package handlers

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"strconv"
	"strings"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/gin-gonic/gin"
	"github.com/golang-jwt/jwt/v5"
	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgxpool"
	"github.com/patbritton/sojorn-backend/internal/services"
	"github.com/rs/zerolog/log"
	"golang.org/x/crypto/bcrypt"
)

type AdminHandler struct {
	pool              *pgxpool.Pool
	moderationService *services.ModerationService
	appealService     *services.AppealService
	jwtSecret         string
	turnstileSecret   string
	s3Client          *s3.Client
	mediaBucket       string
	videoBucket       string
	imgDomain         string
	vidDomain         string
}

func NewAdminHandler(pool *pgxpool.Pool, moderationService *services.ModerationService, appealService *services.AppealService, jwtSecret string, turnstileSecret string, s3Client *s3.Client, mediaBucket string, videoBucket string, imgDomain string, vidDomain string) *AdminHandler {
	return &AdminHandler{
		pool:              pool,
		moderationService: moderationService,
		appealService:     appealService,
		jwtSecret:         jwtSecret,
		turnstileSecret:   turnstileSecret,
		s3Client:          s3Client,
		mediaBucket:       mediaBucket,
		videoBucket:       videoBucket,
		imgDomain:         imgDomain,
		vidDomain:         vidDomain,
	}
}

// ──────────────────────────────────────────────
// Admin Login (invisible Turnstile verification)
// ──────────────────────────────────────────────

func (h *AdminHandler) AdminLogin(c *gin.Context) {
	ctx := c.Request.Context()

	var req struct {
		Email          string `json:"email" binding:"required,email"`
		Password       string `json:"password" binding:"required"`
		TurnstileToken string `json:"turnstile_token"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	req.Email = strings.ToLower(strings.TrimSpace(req.Email))

	// Verify Turnstile token (invisible mode)
	if h.turnstileSecret != "" {
		turnstileService := services.NewTurnstileService(h.turnstileSecret)
		remoteIP := c.ClientIP()
		turnstileResp, err := turnstileService.VerifyToken(req.TurnstileToken, remoteIP)
		if err != nil {
			log.Error().Err(err).Msg("Admin login: Turnstile verification failed")
			c.JSON(http.StatusBadRequest, gin.H{"error": "Security verification failed"})
			return
		}
		if !turnstileResp.Success {
			log.Warn().Strs("errors", turnstileResp.ErrorCodes).Msg("Admin login: Turnstile validation failed")
			c.JSON(http.StatusForbidden, gin.H{"error": "Security verification failed. Please try again."})
			return
		}
	}

	// Look up user
	var userID uuid.UUID
	var passwordHash, status string
	err := h.pool.QueryRow(ctx,
		`SELECT id, encrypted_password, COALESCE(status, 'active') FROM users WHERE email = $1 AND deleted_at IS NULL`,
		req.Email).Scan(&userID, &passwordHash, &status)
	if err != nil {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid credentials"})
		return
	}

	if err := bcrypt.CompareHashAndPassword([]byte(passwordHash), []byte(req.Password)); err != nil {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid credentials"})
		return
	}

	if status != "active" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Account is not active"})
		return
	}

	// Check admin role
	var role string
	err = h.pool.QueryRow(ctx,
		`SELECT COALESCE(role, 'user') FROM profiles WHERE id = $1`, userID).Scan(&role)
	if err != nil || role != "admin" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Admin access required"})
		return
	}

	// Generate JWT
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
		"sub":  userID.String(),
		"exp":  time.Now().Add(24 * time.Hour).Unix(),
		"role": "authenticated",
	})
	tokenString, err := token.SignedString([]byte(h.jwtSecret))
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to generate token"})
		return
	}

	// Get profile info
	var handle, displayName string
	var avatarURL *string
	h.pool.QueryRow(ctx,
		`SELECT handle, display_name, avatar_url FROM profiles WHERE id = $1`, userID).Scan(&handle, &displayName, &avatarURL)

	c.JSON(http.StatusOK, gin.H{
		"access_token": tokenString,
		"user": gin.H{
			"id":           userID,
			"email":        req.Email,
			"handle":       handle,
			"display_name": displayName,
			"avatar_url":   avatarURL,
			"role":         role,
		},
	})
}

// ──────────────────────────────────────────────
// Dashboard / Stats
// ──────────────────────────────────────────────

func (h *AdminHandler) GetDashboardStats(c *gin.Context) {
	ctx := c.Request.Context()

	stats := gin.H{}

	// Total users
	var totalUsers, activeUsers, suspendedUsers, bannedUsers int
	err := h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM public.profiles`).Scan(&totalUsers)
	if err != nil {
		log.Error().Err(err).Msg("Failed to count users")
	}
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM users WHERE status = 'active'`).Scan(&activeUsers)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM users WHERE status = 'suspended'`).Scan(&suspendedUsers)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM users WHERE status = 'banned'`).Scan(&bannedUsers)

	// Total posts
	var totalPosts, activePosts, flaggedPosts, removedPosts int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM posts`).Scan(&totalPosts)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM posts WHERE status = 'active'`).Scan(&activePosts)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM posts WHERE status = 'flagged'`).Scan(&flaggedPosts)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM posts WHERE status = 'removed'`).Scan(&removedPosts)

	// Moderation
	var pendingFlags, reviewedFlags int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM moderation_flags WHERE status = 'pending'`).Scan(&pendingFlags)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM moderation_flags WHERE status != 'pending'`).Scan(&reviewedFlags)

	// Appeals
	var pendingAppeals, approvedAppeals, rejectedAppeals int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM user_appeals WHERE status = 'pending'`).Scan(&pendingAppeals)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM user_appeals WHERE status = 'approved'`).Scan(&approvedAppeals)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM user_appeals WHERE status = 'rejected'`).Scan(&rejectedAppeals)

	// New users today
	var newUsersToday int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM users WHERE created_at >= CURRENT_DATE`).Scan(&newUsersToday)

	// New posts today
	var newPostsToday int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM posts WHERE created_at >= CURRENT_DATE`).Scan(&newPostsToday)

	// Reports
	var pendingReports int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM reports WHERE status = 'pending'`).Scan(&pendingReports)

	stats["users"] = gin.H{
		"total":     totalUsers,
		"active":    activeUsers,
		"suspended": suspendedUsers,
		"banned":    bannedUsers,
		"new_today": newUsersToday,
	}
	stats["posts"] = gin.H{
		"total":     totalPosts,
		"active":    activePosts,
		"flagged":   flaggedPosts,
		"removed":   removedPosts,
		"new_today": newPostsToday,
	}
	stats["moderation"] = gin.H{
		"pending_flags":  pendingFlags,
		"reviewed_flags": reviewedFlags,
	}
	stats["appeals"] = gin.H{
		"pending":  pendingAppeals,
		"approved": approvedAppeals,
		"rejected": rejectedAppeals,
	}
	stats["reports"] = gin.H{
		"pending": pendingReports,
	}

	c.JSON(http.StatusOK, stats)
}

// GetGrowthStats returns user/post growth over time for charts
func (h *AdminHandler) GetGrowthStats(c *gin.Context) {
	ctx := c.Request.Context()
	days, _ := strconv.Atoi(c.DefaultQuery("days", "30"))
	if days > 365 {
		days = 365
	}

	// User growth
	userRows, err := h.pool.Query(ctx, `
		SELECT DATE(created_at) as day, COUNT(*) as count
		FROM users
		WHERE created_at >= NOW() - $1::int * INTERVAL '1 day'
		GROUP BY DATE(created_at)
		ORDER BY day
	`, days)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch growth stats"})
		return
	}
	defer userRows.Close()

	var userGrowth []gin.H
	for userRows.Next() {
		var day time.Time
		var count int
		if err := userRows.Scan(&day, &count); err == nil {
			userGrowth = append(userGrowth, gin.H{"date": day.Format("2006-01-02"), "count": count})
		}
	}

	// Post growth
	postRows, err := h.pool.Query(ctx, `
		SELECT DATE(created_at) as day, COUNT(*) as count
		FROM posts
		WHERE created_at >= NOW() - $1::int * INTERVAL '1 day'
		GROUP BY DATE(created_at)
		ORDER BY day
	`, days)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch post growth"})
		return
	}
	defer postRows.Close()

	var postGrowth []gin.H
	for postRows.Next() {
		var day time.Time
		var count int
		if err := postRows.Scan(&day, &count); err == nil {
			postGrowth = append(postGrowth, gin.H{"date": day.Format("2006-01-02"), "count": count})
		}
	}

	c.JSON(http.StatusOK, gin.H{
		"user_growth": userGrowth,
		"post_growth": postGrowth,
		"days":        days,
	})
}

// ──────────────────────────────────────────────
// User Management
// ──────────────────────────────────────────────

func (h *AdminHandler) ListUsers(c *gin.Context) {
	ctx := c.Request.Context()
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "50"))
	offset, _ := strconv.Atoi(c.DefaultQuery("offset", "0"))
	search := c.Query("search")
	statusFilter := c.Query("status")
	roleFilter := c.Query("role")

	if limit > 200 {
		limit = 200
	}

	query := `
		SELECT u.id, u.email, u.status, u.created_at,
		       p.handle, p.display_name, p.avatar_url, p.role, p.is_official, p.is_private, p.strikes
		FROM users u
		LEFT JOIN profiles p ON u.id = p.id
		WHERE u.deleted_at IS NULL
	`
	args := []interface{}{}
	argIdx := 1

	if search != "" {
		query += fmt.Sprintf(` AND (p.handle ILIKE $%d OR p.display_name ILIKE $%d OR u.email ILIKE $%d)`, argIdx, argIdx, argIdx)
		args = append(args, "%"+search+"%")
		argIdx++
	}
	if statusFilter != "" {
		query += fmt.Sprintf(` AND u.status = $%d`, argIdx)
		args = append(args, statusFilter)
		argIdx++
	}
	if roleFilter != "" {
		query += fmt.Sprintf(` AND p.role = $%d`, argIdx)
		args = append(args, roleFilter)
		argIdx++
	}

	// Count total
	countQuery := "SELECT COUNT(*) FROM (" + query + ") sub"
	var total int
	h.pool.QueryRow(ctx, countQuery, args...).Scan(&total)

	query += fmt.Sprintf(` ORDER BY u.created_at DESC LIMIT $%d OFFSET $%d`, argIdx, argIdx+1)
	args = append(args, limit, offset)

	rows, err := h.pool.Query(ctx, query, args...)
	if err != nil {
		log.Error().Err(err).Msg("Failed to list users")
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list users"})
		return
	}
	defer rows.Close()

	var users []gin.H
	for rows.Next() {
		var id uuid.UUID
		var email, status string
		var createdAt time.Time
		var handle, displayName, avatarURL, role *string
		var isOfficial, isPrivate *bool
		var strikes *int

		if err := rows.Scan(&id, &email, &status, &createdAt, &handle, &displayName, &avatarURL, &role, &isOfficial, &isPrivate, &strikes); err != nil {
			log.Error().Err(err).Msg("Failed to scan user row")
			continue
		}

		users = append(users, gin.H{
			"id":           id,
			"email":        email,
			"status":       status,
			"created_at":   createdAt,
			"handle":       handle,
			"display_name": displayName,
			"avatar_url":   avatarURL,
			"role":         role,
			"is_official":  isOfficial,
			"is_private":   isPrivate,
			"strikes":      strikes,
		})
	}

	if users == nil {
		users = []gin.H{}
	}

	c.JSON(http.StatusOK, gin.H{
		"users":  users,
		"total":  total,
		"limit":  limit,
		"offset": offset,
	})
}

func (h *AdminHandler) GetUser(c *gin.Context) {
	ctx := c.Request.Context()
	userID := c.Param("id")

	// User + profile details
	var id uuid.UUID
	var email, status string
	var createdAt time.Time
	var lastLogin *time.Time
	var handle, displayName, bio, avatarURL, coverURL, role, location, website, originCountry *string
	var isOfficial, isPrivate, isVerified *bool
	var strikes int
	var beaconEnabled, hasCompletedOnboarding bool

	err := h.pool.QueryRow(ctx, `
		SELECT u.id, u.email, u.status, u.created_at, u.last_login,
		       p.handle, p.display_name, p.bio, p.avatar_url, p.cover_url,
		       p.role, p.is_official, p.is_private, p.is_verified, p.strikes,
		       p.beacon_enabled, p.location, p.website, p.origin_country, p.has_completed_onboarding
		FROM users u
		LEFT JOIN profiles p ON u.id = p.id
		WHERE u.id = $1::uuid
	`, userID).Scan(
		&id, &email, &status, &createdAt, &lastLogin,
		&handle, &displayName, &bio, &avatarURL, &coverURL,
		&role, &isOfficial, &isPrivate, &isVerified, &strikes,
		&beaconEnabled, &location, &website, &originCountry, &hasCompletedOnboarding,
	)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "User not found"})
		return
	}

	// Counts
	var followerCount, followingCount, postCount int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM follows WHERE following_id = $1::uuid AND status = 'accepted'`, userID).Scan(&followerCount)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM follows WHERE follower_id = $1::uuid AND status = 'accepted'`, userID).Scan(&followingCount)
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM posts WHERE author_id = $1::uuid AND deleted_at IS NULL`, userID).Scan(&postCount)

	// Violation count
	var violationCount int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM user_violations WHERE user_id = $1::uuid`, userID).Scan(&violationCount)

	// Report count (received)
	var reportCount int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM reports WHERE target_user_id = $1::uuid`, userID).Scan(&reportCount)

	c.JSON(http.StatusOK, gin.H{
		"id": id, "email": email, "status": status, "created_at": createdAt, "last_login": lastLogin,
		"handle": handle, "display_name": displayName, "bio": bio, "avatar_url": avatarURL, "cover_url": coverURL,
		"role": role, "is_official": isOfficial, "is_private": isPrivate, "is_verified": isVerified,
		"strikes": strikes, "beacon_enabled": beaconEnabled, "location": location, "website": website,
		"origin_country": originCountry, "has_completed_onboarding": hasCompletedOnboarding,
		"follower_count": followerCount, "following_count": followingCount, "post_count": postCount,
		"violation_count": violationCount, "report_count": reportCount,
	})
}

func (h *AdminHandler) UpdateUserStatus(c *gin.Context) {
	ctx := c.Request.Context()
	adminID, _ := c.Get("user_id")
	targetUserID := c.Param("id")

	var req struct {
		Status string `json:"status" binding:"required,oneof=active suspended banned deactivated"`
		Reason string `json:"reason" binding:"required,min=3"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// Get old status
	var oldStatus string
	h.pool.QueryRow(ctx, `SELECT status FROM users WHERE id = $1::uuid`, targetUserID).Scan(&oldStatus)

	// Update user status
	_, err := h.pool.Exec(ctx, `UPDATE users SET status = $1 WHERE id = $2::uuid`, req.Status, targetUserID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update user status"})
		return
	}

	// Log status change
	adminUUID, _ := uuid.Parse(adminID.(string))
	h.pool.Exec(ctx, `
		INSERT INTO user_status_history (user_id, old_status, new_status, reason, changed_by)
		VALUES ($1::uuid, $2, $3, $4, $5)
	`, targetUserID, oldStatus, req.Status, req.Reason, adminUUID)

	c.JSON(http.StatusOK, gin.H{"message": "User status updated", "status": req.Status})
}

func (h *AdminHandler) UpdateUserRole(c *gin.Context) {
	ctx := c.Request.Context()
	targetUserID := c.Param("id")

	var req struct {
		Role string `json:"role" binding:"required,oneof=user moderator admin"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	_, err := h.pool.Exec(ctx, `UPDATE profiles SET role = $1 WHERE id = $2::uuid`, req.Role, targetUserID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update user role"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "User role updated", "role": req.Role})
}

func (h *AdminHandler) UpdateUserVerification(c *gin.Context) {
	ctx := c.Request.Context()
	targetUserID := c.Param("id")

	var req struct {
		IsOfficial bool `json:"is_official"`
		IsVerified bool `json:"is_verified"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	_, err := h.pool.Exec(ctx, `UPDATE profiles SET is_official = $1, is_verified = $2 WHERE id = $3::uuid`,
		req.IsOfficial, req.IsVerified, targetUserID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update verification"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Verification updated"})
}

func (h *AdminHandler) ResetUserStrikes(c *gin.Context) {
	ctx := c.Request.Context()
	targetUserID := c.Param("id")

	_, err := h.pool.Exec(ctx, `UPDATE profiles SET strikes = 0 WHERE id = $1::uuid`, targetUserID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to reset strikes"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Strikes reset"})
}

// ──────────────────────────────────────────────
// Post Management
// ──────────────────────────────────────────────

func (h *AdminHandler) ListPosts(c *gin.Context) {
	ctx := c.Request.Context()
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "50"))
	offset, _ := strconv.Atoi(c.DefaultQuery("offset", "0"))
	search := c.Query("search")
	statusFilter := c.Query("status")
	authorFilter := c.Query("author_id")

	if limit > 200 {
		limit = 200
	}

	query := `
		SELECT p.id, p.author_id, p.body, p.status, p.image_url, p.video_url,
		       p.like_count, p.comment_count, p.is_beacon, p.visibility, p.created_at,
		       pr.handle, pr.display_name, pr.avatar_url
		FROM posts p
		LEFT JOIN profiles pr ON p.author_id = pr.id
		WHERE p.deleted_at IS NULL
	`
	args := []interface{}{}
	argIdx := 1

	if search != "" {
		query += fmt.Sprintf(` AND p.body ILIKE $%d`, argIdx)
		args = append(args, "%"+search+"%")
		argIdx++
	}
	if statusFilter != "" {
		query += fmt.Sprintf(` AND p.status = $%d`, argIdx)
		args = append(args, statusFilter)
		argIdx++
	}
	if authorFilter != "" {
		query += fmt.Sprintf(` AND p.author_id = $%d::uuid`, argIdx)
		args = append(args, authorFilter)
		argIdx++
	}

	countQuery := "SELECT COUNT(*) FROM (" + query + ") sub"
	var total int
	h.pool.QueryRow(ctx, countQuery, args...).Scan(&total)

	query += fmt.Sprintf(` ORDER BY p.created_at DESC LIMIT $%d OFFSET $%d`, argIdx, argIdx+1)
	args = append(args, limit, offset)

	rows, err := h.pool.Query(ctx, query, args...)
	if err != nil {
		log.Error().Err(err).Msg("Failed to list posts")
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list posts"})
		return
	}
	defer rows.Close()

	var posts []gin.H
	for rows.Next() {
		var id, authorID uuid.UUID
		var body, status, visibility string
		var imageURL, videoURL *string
		var likeCount, commentCount int
		var isBeacon bool
		var createdAt time.Time
		var authorHandle, authorDisplayName, authorAvatarURL *string

		if err := rows.Scan(&id, &authorID, &body, &status, &imageURL, &videoURL,
			&likeCount, &commentCount, &isBeacon, &visibility, &createdAt,
			&authorHandle, &authorDisplayName, &authorAvatarURL); err != nil {
			log.Error().Err(err).Msg("Failed to scan post row")
			continue
		}

		posts = append(posts, gin.H{
			"id": id, "author_id": authorID, "body": body, "status": status,
			"image_url": imageURL, "video_url": videoURL,
			"like_count": likeCount, "comment_count": commentCount,
			"is_beacon": isBeacon, "visibility": visibility, "created_at": createdAt,
			"author": gin.H{
				"handle": authorHandle, "display_name": authorDisplayName, "avatar_url": authorAvatarURL,
			},
		})
	}

	if posts == nil {
		posts = []gin.H{}
	}

	c.JSON(http.StatusOK, gin.H{
		"posts":  posts,
		"total":  total,
		"limit":  limit,
		"offset": offset,
	})
}

func (h *AdminHandler) GetPost(c *gin.Context) {
	ctx := c.Request.Context()
	postID := c.Param("id")

	var id, authorID uuid.UUID
	var body, status, bodyFormat, visibility string
	var imageURL, videoURL, thumbnailURL, toneLabel, beaconType, backgroundID *string
	var cisScore *float64
	var durationMS, likeCount, commentCount int
	var isBeacon, allowChain bool
	var createdAt time.Time
	var editedAt *time.Time
	var authorHandle, authorDisplayName, authorAvatarURL *string

	err := h.pool.QueryRow(ctx, `
		SELECT p.id, p.author_id, p.body, p.status, p.body_format, p.image_url, p.video_url,
		       p.thumbnail_url, p.tone_label, p.cis_score, COALESCE(p.duration_ms, 0),
		       p.background_id, p.is_beacon, p.beacon_type, p.allow_chain, p.visibility,
		       p.like_count, p.comment_count, p.created_at, p.edited_at,
		       pr.handle, pr.display_name, pr.avatar_url
		FROM posts p
		LEFT JOIN profiles pr ON p.author_id = pr.id
		WHERE p.id = $1::uuid
	`, postID).Scan(
		&id, &authorID, &body, &status, &bodyFormat, &imageURL, &videoURL,
		&thumbnailURL, &toneLabel, &cisScore, &durationMS,
		&backgroundID, &isBeacon, &beaconType, &allowChain, &visibility,
		&likeCount, &commentCount, &createdAt, &editedAt,
		&authorHandle, &authorDisplayName, &authorAvatarURL,
	)
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Post not found"})
		return
	}

	// Get moderation flags
	flagRows, _ := h.pool.Query(ctx, `
		SELECT id, flag_reason, scores, status, reviewed_by, reviewed_at, created_at
		FROM moderation_flags WHERE post_id = $1::uuid ORDER BY created_at DESC
	`, postID)
	defer flagRows.Close()

	var flags []gin.H
	for flagRows.Next() {
		var fID uuid.UUID
		var fReason, fStatus string
		var fScores []byte
		var fReviewedBy *uuid.UUID
		var fReviewedAt *time.Time
		var fCreatedAt time.Time

		if err := flagRows.Scan(&fID, &fReason, &fScores, &fStatus, &fReviewedBy, &fReviewedAt, &fCreatedAt); err == nil {
			var scores map[string]float64
			json.Unmarshal(fScores, &scores)
			flags = append(flags, gin.H{
				"id": fID, "flag_reason": fReason, "scores": scores, "status": fStatus,
				"reviewed_by": fReviewedBy, "reviewed_at": fReviewedAt, "created_at": fCreatedAt,
			})
		}
	}

	c.JSON(http.StatusOK, gin.H{
		"id": id, "author_id": authorID, "body": body, "status": status, "body_format": bodyFormat,
		"image_url": imageURL, "video_url": videoURL, "thumbnail_url": thumbnailURL,
		"tone_label": toneLabel, "cis_score": cisScore, "duration_ms": durationMS,
		"background_id": backgroundID, "is_beacon": isBeacon, "beacon_type": beaconType,
		"allow_chain": allowChain, "visibility": visibility,
		"like_count": likeCount, "comment_count": commentCount,
		"created_at": createdAt, "edited_at": editedAt,
		"author": gin.H{
			"handle": authorHandle, "display_name": authorDisplayName, "avatar_url": authorAvatarURL,
		},
		"moderation_flags": flags,
	})
}

func (h *AdminHandler) UpdatePostStatus(c *gin.Context) {
	ctx := c.Request.Context()
	adminID, _ := c.Get("user_id")
	postID := c.Param("id")

	var req struct {
		Status string `json:"status" binding:"required,oneof=active flagged removed"`
		Reason string `json:"reason"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	_, err := h.pool.Exec(ctx, `UPDATE posts SET status = $1 WHERE id = $2::uuid`, req.Status, postID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update post status"})
		return
	}

	// Log the action
	adminUUID, _ := uuid.Parse(adminID.(string))
	h.pool.Exec(ctx, `
		INSERT INTO audit_log (actor_id, action, target_type, target_id, details)
		VALUES ($1, $2, 'post', $3::uuid, $4)
	`, adminUUID, "post_status_change", postID, fmt.Sprintf(`{"status":"%s","reason":"%s"}`, req.Status, req.Reason))

	c.JSON(http.StatusOK, gin.H{"message": "Post status updated", "status": req.Status})
}

func (h *AdminHandler) DeletePost(c *gin.Context) {
	ctx := c.Request.Context()
	adminID, _ := c.Get("user_id")
	postID := c.Param("id")

	_, err := h.pool.Exec(ctx, `UPDATE posts SET deleted_at = NOW(), status = 'removed' WHERE id = $1::uuid`, postID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to delete post"})
		return
	}

	adminUUID, _ := uuid.Parse(adminID.(string))
	h.pool.Exec(ctx, `
		INSERT INTO audit_log (actor_id, action, target_type, target_id, details)
		VALUES ($1, 'admin_delete_post', 'post', $2::uuid, '{}')
	`, adminUUID, postID)

	c.JSON(http.StatusOK, gin.H{"message": "Post deleted"})
}

// ──────────────────────────────────────────────
// Moderation Queue
// ──────────────────────────────────────────────

func (h *AdminHandler) GetModerationQueue(c *gin.Context) {
	ctx := c.Request.Context()
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "50"))
	offset, _ := strconv.Atoi(c.DefaultQuery("offset", "0"))
	statusFilter := c.DefaultQuery("status", "pending")

	if limit > 200 {
		limit = 200
	}

	rows, err := h.pool.Query(ctx, `
		SELECT mf.id, mf.post_id, mf.comment_id, mf.flag_reason, mf.scores,
		       mf.status, mf.reviewed_by, mf.reviewed_at, mf.created_at,
		       p.body as post_body, p.image_url as post_image, p.video_url as post_video, p.author_id as post_author_id,
		       c.body as comment_body, c.author_id as comment_author_id,
		       COALESCE(pr_post.handle, pr_comment.handle) as author_handle,
		       COALESCE(pr_post.display_name, pr_comment.display_name) as author_display_name
		FROM moderation_flags mf
		LEFT JOIN posts p ON mf.post_id = p.id
		LEFT JOIN comments c ON mf.comment_id = c.id
		LEFT JOIN profiles pr_post ON p.author_id = pr_post.id
		LEFT JOIN profiles pr_comment ON c.author_id = pr_comment.id
		WHERE mf.status = $1
		ORDER BY mf.created_at ASC
		LIMIT $2 OFFSET $3
	`, statusFilter, limit, offset)
	if err != nil {
		log.Error().Err(err).Msg("Failed to fetch moderation queue")
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch moderation queue"})
		return
	}
	defer rows.Close()

	var total int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM moderation_flags WHERE status = $1`, statusFilter).Scan(&total)

	var items []gin.H
	for rows.Next() {
		var fID uuid.UUID
		var postID, commentID *uuid.UUID
		var flagReason, fStatus string
		var fScores []byte
		var reviewedBy *uuid.UUID
		var reviewedAt *time.Time
		var fCreatedAt time.Time
		var postBody, postImage, postVideo *string
		var postAuthorID, commentAuthorID *uuid.UUID
		var commentBody *string
		var authorHandle, authorDisplayName *string

		if err := rows.Scan(&fID, &postID, &commentID, &flagReason, &fScores,
			&fStatus, &reviewedBy, &reviewedAt, &fCreatedAt,
			&postBody, &postImage, &postVideo, &postAuthorID,
			&commentBody, &commentAuthorID,
			&authorHandle, &authorDisplayName); err != nil {
			log.Error().Err(err).Msg("Failed to scan moderation flag")
			continue
		}

		var scores map[string]float64
		json.Unmarshal(fScores, &scores)

		contentType := "post"
		if commentID != nil {
			contentType = "comment"
		}

		items = append(items, gin.H{
			"id": fID, "post_id": postID, "comment_id": commentID,
			"flag_reason": flagReason, "scores": scores, "status": fStatus,
			"reviewed_by": reviewedBy, "reviewed_at": reviewedAt, "created_at": fCreatedAt,
			"content_type":      contentType,
			"post_body":         postBody,
			"post_image":        postImage,
			"post_video":        postVideo,
			"comment_body":      commentBody,
			"author_handle":     authorHandle,
			"author_name":       authorDisplayName,
			"post_author_id":    postAuthorID,
			"comment_author_id": commentAuthorID,
		})
	}

	if items == nil {
		items = []gin.H{}
	}

	c.JSON(http.StatusOK, gin.H{
		"items":  items,
		"total":  total,
		"limit":  limit,
		"offset": offset,
	})
}

func (h *AdminHandler) ReviewModerationFlag(c *gin.Context) {
	ctx := c.Request.Context()
	adminID, _ := c.Get("user_id")
	flagID := c.Param("id")

	var req struct {
		Action string `json:"action" binding:"required,oneof=approve dismiss remove_content ban_user"`
		Reason string `json:"reason"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	adminUUID, _ := uuid.Parse(adminID.(string))
	flagUUID, err := uuid.Parse(flagID)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid flag ID"})
		return
	}

	switch req.Action {
	case "approve":
		// Content is fine, dismiss the flag
		h.moderationService.UpdateFlagStatus(ctx, flagUUID, "dismissed", adminUUID)

	case "dismiss":
		h.moderationService.UpdateFlagStatus(ctx, flagUUID, "dismissed", adminUUID)

	case "remove_content":
		// Remove the flagged content
		h.moderationService.UpdateFlagStatus(ctx, flagUUID, "actioned", adminUUID)

		// Get the post/comment ID and remove
		var postID, commentID *uuid.UUID
		h.pool.QueryRow(ctx, `SELECT post_id, comment_id FROM moderation_flags WHERE id = $1`, flagUUID).Scan(&postID, &commentID)
		if postID != nil {
			h.pool.Exec(ctx, `UPDATE posts SET status = 'removed', deleted_at = NOW() WHERE id = $1`, postID)
		}
		if commentID != nil {
			h.pool.Exec(ctx, `UPDATE comments SET status = 'removed', deleted_at = NOW() WHERE id = $1`, commentID)
		}

	case "ban_user":
		h.moderationService.UpdateFlagStatus(ctx, flagUUID, "actioned", adminUUID)

		// Get the author and ban them
		var postID, commentID *uuid.UUID
		h.pool.QueryRow(ctx, `SELECT post_id, comment_id FROM moderation_flags WHERE id = $1`, flagUUID).Scan(&postID, &commentID)

		var authorID *uuid.UUID
		if postID != nil {
			h.pool.QueryRow(ctx, `SELECT author_id FROM posts WHERE id = $1`, postID).Scan(&authorID)
		}
		if commentID != nil {
			h.pool.QueryRow(ctx, `SELECT author_id FROM comments WHERE id = $1`, commentID).Scan(&authorID)
		}
		if authorID != nil {
			h.moderationService.UpdateUserStatus(ctx, *authorID, "banned", adminUUID, req.Reason)
		}
	}

	c.JSON(http.StatusOK, gin.H{"message": "Flag reviewed", "action": req.Action})
}

// ──────────────────────────────────────────────
// Appeal Management
// ──────────────────────────────────────────────

func (h *AdminHandler) ListAppeals(c *gin.Context) {
	ctx := c.Request.Context()
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "50"))
	offset, _ := strconv.Atoi(c.DefaultQuery("offset", "0"))
	statusFilter := c.DefaultQuery("status", "pending")

	if limit > 200 {
		limit = 200
	}

	rows, err := h.pool.Query(ctx, `
		SELECT ua.id, ua.user_violation_id, ua.user_id, ua.appeal_reason, ua.appeal_context,
		       ua.status, ua.reviewed_by, ua.review_decision, ua.reviewed_at, ua.created_at,
		       uv.violation_type, uv.violation_reason, uv.severity_score,
		       mf.flag_reason, mf.scores,
		       p.body as post_body, p.image_url,
		       c.body as comment_body,
		       pr.handle, pr.display_name, pr.avatar_url
		FROM user_appeals ua
		JOIN user_violations uv ON ua.user_violation_id = uv.id
		LEFT JOIN moderation_flags mf ON uv.moderation_flag_id = mf.id
		LEFT JOIN posts p ON mf.post_id = p.id
		LEFT JOIN comments c ON mf.comment_id = c.id
		JOIN profiles pr ON ua.user_id = pr.id
		WHERE ua.status = $1
		ORDER BY ua.created_at ASC
		LIMIT $2 OFFSET $3
	`, statusFilter, limit, offset)
	if err != nil {
		log.Error().Err(err).Msg("Failed to list appeals")
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list appeals"})
		return
	}
	defer rows.Close()

	var total int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM user_appeals WHERE status = $1`, statusFilter).Scan(&total)

	var appeals []gin.H
	for rows.Next() {
		var aID, violationID, userID uuid.UUID
		var appealReason, appealContext, aStatus string
		var reviewedBy *uuid.UUID
		var reviewDecision *string
		var reviewedAt *time.Time
		var aCreatedAt time.Time
		var violationType, violationReason string
		var severityScore float64
		var flagReason *string
		var flagScores []byte
		var postBody, postImage, commentBody *string
		var handle, displayName, avatarURL *string

		if err := rows.Scan(&aID, &violationID, &userID, &appealReason, &appealContext,
			&aStatus, &reviewedBy, &reviewDecision, &reviewedAt, &aCreatedAt,
			&violationType, &violationReason, &severityScore,
			&flagReason, &flagScores,
			&postBody, &postImage, &commentBody,
			&handle, &displayName, &avatarURL); err != nil {
			log.Error().Err(err).Msg("Failed to scan appeal")
			continue
		}

		var scores map[string]float64
		if flagScores != nil {
			json.Unmarshal(flagScores, &scores)
		}

		appeals = append(appeals, gin.H{
			"id": aID, "violation_id": violationID, "user_id": userID,
			"appeal_reason": appealReason, "appeal_context": appealContext,
			"status": aStatus, "reviewed_by": reviewedBy, "review_decision": reviewDecision,
			"reviewed_at": reviewedAt, "created_at": aCreatedAt,
			"violation_type": violationType, "violation_reason": violationReason,
			"severity_score": severityScore, "flag_reason": flagReason, "flag_scores": scores,
			"post_body": postBody, "post_image": postImage, "comment_body": commentBody,
			"user": gin.H{
				"handle": handle, "display_name": displayName, "avatar_url": avatarURL,
			},
		})
	}

	if appeals == nil {
		appeals = []gin.H{}
	}

	c.JSON(http.StatusOK, gin.H{
		"appeals": appeals,
		"total":   total,
		"limit":   limit,
		"offset":  offset,
	})
}

func (h *AdminHandler) ReviewAppeal(c *gin.Context) {
	ctx := c.Request.Context()
	adminID, _ := c.Get("user_id")
	appealID := c.Param("id")

	var req struct {
		Decision       string `json:"decision" binding:"required,oneof=approved rejected"`
		ReviewDecision string `json:"review_decision" binding:"required,min=5"`
		RestoreContent bool   `json:"restore_content"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	adminUUID, _ := uuid.Parse(adminID.(string))
	appealUUID, err := uuid.Parse(appealID)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid appeal ID"})
		return
	}

	err = h.appealService.ReviewAppeal(ctx, appealUUID, adminUUID, req.Decision, req.ReviewDecision)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to review appeal"})
		return
	}

	// If approved and restore_content, restore the content
	if req.Decision == "approved" && req.RestoreContent {
		var violationID uuid.UUID
		h.pool.QueryRow(ctx, `SELECT user_violation_id FROM user_appeals WHERE id = $1`, appealUUID).Scan(&violationID)

		var flagID uuid.UUID
		h.pool.QueryRow(ctx, `SELECT moderation_flag_id FROM user_violations WHERE id = $1`, violationID).Scan(&flagID)

		var postID, commentID *uuid.UUID
		h.pool.QueryRow(ctx, `SELECT post_id, comment_id FROM moderation_flags WHERE id = $1`, flagID).Scan(&postID, &commentID)

		if postID != nil {
			h.pool.Exec(ctx, `UPDATE posts SET status = 'active', deleted_at = NULL WHERE id = $1`, postID)
		}
		if commentID != nil {
			h.pool.Exec(ctx, `UPDATE comments SET status = 'active', deleted_at = NULL WHERE id = $1`, commentID)
		}
	}

	c.JSON(http.StatusOK, gin.H{"message": "Appeal reviewed", "decision": req.Decision})
}

// ──────────────────────────────────────────────
// Reports Management
// ──────────────────────────────────────────────

func (h *AdminHandler) ListReports(c *gin.Context) {
	ctx := c.Request.Context()
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "50"))
	offset, _ := strconv.Atoi(c.DefaultQuery("offset", "0"))
	statusFilter := c.DefaultQuery("status", "pending")

	rows, err := h.pool.Query(ctx, `
		SELECT r.id, r.reporter_id, r.target_user_id, r.post_id, r.comment_id,
		       r.violation_type, r.description, r.status, r.created_at,
		       pr_reporter.handle as reporter_handle,
		       pr_target.handle as target_handle
		FROM reports r
		LEFT JOIN profiles pr_reporter ON r.reporter_id = pr_reporter.id
		LEFT JOIN profiles pr_target ON r.target_user_id = pr_target.id
		WHERE r.status = $1
		ORDER BY r.created_at ASC
		LIMIT $2 OFFSET $3
	`, statusFilter, limit, offset)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list reports"})
		return
	}
	defer rows.Close()

	var total int
	h.pool.QueryRow(ctx, `SELECT COUNT(*) FROM reports WHERE status = $1`, statusFilter).Scan(&total)

	var reports []gin.H
	for rows.Next() {
		var rID, reporterID, targetUserID uuid.UUID
		var postID, commentID *uuid.UUID
		var violationType, description, rStatus string
		var rCreatedAt time.Time
		var reporterHandle, targetHandle *string

		if err := rows.Scan(&rID, &reporterID, &targetUserID, &postID, &commentID,
			&violationType, &description, &rStatus, &rCreatedAt,
			&reporterHandle, &targetHandle); err != nil {
			continue
		}

		reports = append(reports, gin.H{
			"id": rID, "reporter_id": reporterID, "target_user_id": targetUserID,
			"post_id": postID, "comment_id": commentID,
			"violation_type": violationType, "description": description,
			"status": rStatus, "created_at": rCreatedAt,
			"reporter_handle": reporterHandle, "target_handle": targetHandle,
		})
	}

	if reports == nil {
		reports = []gin.H{}
	}

	c.JSON(http.StatusOK, gin.H{"reports": reports, "total": total, "limit": limit, "offset": offset})
}

func (h *AdminHandler) UpdateReportStatus(c *gin.Context) {
	ctx := c.Request.Context()
	reportID := c.Param("id")

	var req struct {
		Status string `json:"status" binding:"required,oneof=reviewed dismissed actioned"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	_, err := h.pool.Exec(ctx, `UPDATE reports SET status = $1 WHERE id = $2::uuid`, req.Status, reportID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update report"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Report updated"})
}

// ──────────────────────────────────────────────
// Algorithm / Feed Settings
// ──────────────────────────────────────────────

func (h *AdminHandler) GetAlgorithmConfig(c *gin.Context) {
	ctx := c.Request.Context()

	rows, err := h.pool.Query(ctx, `
		SELECT key, value, description, updated_at
		FROM algorithm_config
		ORDER BY key
	`)
	if err != nil {
		// Table may not exist yet, return defaults
		c.JSON(http.StatusOK, gin.H{
			"config": []gin.H{
				{"key": "feed_recency_weight", "value": "0.4", "description": "Weight for post recency in feed ranking"},
				{"key": "feed_engagement_weight", "value": "0.3", "description": "Weight for engagement metrics"},
				{"key": "feed_harmony_weight", "value": "0.2", "description": "Weight for author harmony score"},
				{"key": "feed_diversity_weight", "value": "0.1", "description": "Weight for content diversity"},
				{"key": "moderation_auto_flag_threshold", "value": "0.7", "description": "AI score threshold for auto-flagging"},
				{"key": "moderation_auto_remove_threshold", "value": "0.95", "description": "AI score threshold for auto-removal"},
			},
		})
		return
	}
	defer rows.Close()

	var configs []gin.H
	for rows.Next() {
		var key, value string
		var description *string
		var updatedAt time.Time
		if err := rows.Scan(&key, &value, &description, &updatedAt); err == nil {
			configs = append(configs, gin.H{
				"key": key, "value": value, "description": description, "updated_at": updatedAt,
			})
		}
	}

	if configs == nil {
		configs = []gin.H{}
	}

	c.JSON(http.StatusOK, gin.H{"config": configs})
}

func (h *AdminHandler) UpdateAlgorithmConfig(c *gin.Context) {
	ctx := c.Request.Context()

	var req struct {
		Key   string `json:"key" binding:"required"`
		Value string `json:"value" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	_, err := h.pool.Exec(ctx, `
		INSERT INTO algorithm_config (key, value, updated_at)
		VALUES ($1, $2, NOW())
		ON CONFLICT (key) DO UPDATE SET value = $2, updated_at = NOW()
	`, req.Key, req.Value)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update config"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Config updated"})
}

// ──────────────────────────────────────────────
// Categories Management
// ──────────────────────────────────────────────

func (h *AdminHandler) ListCategories(c *gin.Context) {
	ctx := c.Request.Context()

	rows, err := h.pool.Query(ctx, `
		SELECT id, slug, name, description, is_sensitive, created_at
		FROM categories ORDER BY name
	`)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list categories"})
		return
	}
	defer rows.Close()

	var categories []gin.H
	for rows.Next() {
		var id uuid.UUID
		var slug, name string
		var description *string
		var isSensitive bool
		var createdAt time.Time

		if err := rows.Scan(&id, &slug, &name, &description, &isSensitive, &createdAt); err == nil {
			categories = append(categories, gin.H{
				"id": id, "slug": slug, "name": name, "description": description,
				"is_sensitive": isSensitive, "created_at": createdAt,
			})
		}
	}

	c.JSON(http.StatusOK, gin.H{"categories": categories})
}

func (h *AdminHandler) CreateCategory(c *gin.Context) {
	ctx := c.Request.Context()

	var req struct {
		Slug        string `json:"slug" binding:"required"`
		Name        string `json:"name" binding:"required"`
		Description string `json:"description"`
		IsSensitive bool   `json:"is_sensitive"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	var id uuid.UUID
	err := h.pool.QueryRow(ctx, `
		INSERT INTO categories (slug, name, description, is_sensitive)
		VALUES ($1, $2, $3, $4) RETURNING id
	`, req.Slug, req.Name, req.Description, req.IsSensitive).Scan(&id)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create category"})
		return
	}

	c.JSON(http.StatusCreated, gin.H{"id": id, "message": "Category created"})
}

func (h *AdminHandler) UpdateCategory(c *gin.Context) {
	ctx := c.Request.Context()
	catID := c.Param("id")

	var req struct {
		Name        string `json:"name"`
		Description string `json:"description"`
		IsSensitive *bool  `json:"is_sensitive"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if req.Name != "" {
		h.pool.Exec(ctx, `UPDATE categories SET name = $1 WHERE id = $2::uuid`, req.Name, catID)
	}
	if req.Description != "" {
		h.pool.Exec(ctx, `UPDATE categories SET description = $1 WHERE id = $2::uuid`, req.Description, catID)
	}
	if req.IsSensitive != nil {
		h.pool.Exec(ctx, `UPDATE categories SET is_sensitive = $1 WHERE id = $2::uuid`, *req.IsSensitive, catID)
	}

	c.JSON(http.StatusOK, gin.H{"message": "Category updated"})
}

// ──────────────────────────────────────────────
// System Health
// ──────────────────────────────────────────────

func (h *AdminHandler) GetSystemHealth(c *gin.Context) {
	ctx := c.Request.Context()

	health := gin.H{"status": "healthy"}

	// Database check
	start := time.Now()
	err := h.pool.Ping(ctx)
	dbLatency := time.Since(start).Milliseconds()
	if err != nil {
		health["database"] = gin.H{"status": "unhealthy", "error": err.Error()}
	} else {
		health["database"] = gin.H{"status": "healthy", "latency_ms": dbLatency}
	}

	// Pool stats
	poolStats := h.pool.Stat()
	health["connection_pool"] = gin.H{
		"total":        poolStats.TotalConns(),
		"idle":         poolStats.IdleConns(),
		"acquired":     poolStats.AcquiredConns(),
		"max":          poolStats.MaxConns(),
		"constructing": poolStats.ConstructingConns(),
	}

	// Table sizes
	var dbSize string
	h.pool.QueryRow(ctx, `SELECT pg_size_pretty(pg_database_size('sojorn'))`).Scan(&dbSize)
	health["database_size"] = dbSize

	c.JSON(http.StatusOK, health)
}

// ──────────────────────────────────────────────
// Audit Log
// ──────────────────────────────────────────────

func (h *AdminHandler) GetAuditLog(c *gin.Context) {
	ctx := c.Request.Context()
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "50"))
	offset, _ := strconv.Atoi(c.DefaultQuery("offset", "0"))

	rows, err := h.pool.Query(ctx, `
		SELECT al.id, al.actor_id, al.action, al.target_type, al.target_id, al.details, al.created_at,
		       pr.handle as actor_handle
		FROM audit_log al
		LEFT JOIN profiles pr ON al.actor_id = pr.id
		ORDER BY al.created_at DESC
		LIMIT $1 OFFSET $2
	`, limit, offset)
	if err != nil {
		// Table may not exist
		c.JSON(http.StatusOK, gin.H{"entries": []gin.H{}, "total": 0})
		return
	}
	defer rows.Close()

	var entries []gin.H
	for rows.Next() {
		var id uuid.UUID
		var actorID *uuid.UUID
		var action, targetType string
		var targetID *uuid.UUID
		var details *string
		var createdAt time.Time
		var actorHandle *string

		if err := rows.Scan(&id, &actorID, &action, &targetType, &targetID, &details, &createdAt, &actorHandle); err == nil {
			entries = append(entries, gin.H{
				"id": id, "actor_id": actorID, "action": action,
				"target_type": targetType, "target_id": targetID,
				"details": details, "created_at": createdAt, "actor_handle": actorHandle,
			})
		}
	}

	if entries == nil {
		entries = []gin.H{}
	}

	c.JSON(http.StatusOK, gin.H{"entries": entries, "limit": limit, "offset": offset})
}

// ──────────────────────────────────────────────
// R2 Storage Browser
// ──────────────────────────────────────────────

func (h *AdminHandler) GetStorageStats(c *gin.Context) {
	if h.s3Client == nil {
		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "R2 storage not configured"})
		return
	}

	ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
	defer cancel()

	type bucketStats struct {
		Name        string `json:"name"`
		ObjectCount int    `json:"object_count"`
		TotalSize   int64  `json:"total_size"`
		Domain      string `json:"domain"`
	}

	getBucketStats := func(bucket, domain string) bucketStats {
		stats := bucketStats{Name: bucket, Domain: domain}
		var continuationToken *string
		for {
			input := &s3.ListObjectsV2Input{
				Bucket:            aws.String(bucket),
				ContinuationToken: continuationToken,
				MaxKeys:           aws.Int32(1000),
			}
			output, err := h.s3Client.ListObjectsV2(ctx, input)
			if err != nil {
				log.Error().Err(err).Str("bucket", bucket).Msg("Failed to list R2 objects for stats")
				break
			}
			for _, obj := range output.Contents {
				stats.ObjectCount++
				stats.TotalSize += aws.ToInt64(obj.Size)
			}
			if !aws.ToBool(output.IsTruncated) {
				break
			}
			continuationToken = output.NextContinuationToken
		}
		return stats
	}

	mediaStats := getBucketStats(h.mediaBucket, h.imgDomain)
	videoStats := getBucketStats(h.videoBucket, h.vidDomain)

	c.JSON(http.StatusOK, gin.H{
		"buckets":       []bucketStats{mediaStats, videoStats},
		"total_objects": mediaStats.ObjectCount + videoStats.ObjectCount,
		"total_size":    mediaStats.TotalSize + videoStats.TotalSize,
	})
}

func (h *AdminHandler) ListStorageObjects(c *gin.Context) {
	if h.s3Client == nil {
		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "R2 storage not configured"})
		return
	}

	ctx, cancel := context.WithTimeout(c.Request.Context(), 10*time.Second)
	defer cancel()

	bucket := c.DefaultQuery("bucket", h.mediaBucket)
	prefix := c.Query("prefix")
	marker := c.Query("cursor")
	limitStr := c.DefaultQuery("limit", "50")
	limit, _ := strconv.Atoi(limitStr)
	if limit > 200 {
		limit = 200
	}

	// Validate bucket
	if bucket != h.mediaBucket && bucket != h.videoBucket {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid bucket name"})
		return
	}

	// Determine public domain
	domain := h.imgDomain
	if bucket == h.videoBucket {
		domain = h.vidDomain
	}

	input := &s3.ListObjectsV2Input{
		Bucket:  aws.String(bucket),
		MaxKeys: aws.Int32(int32(limit)),
	}
	if prefix != "" {
		input.Prefix = aws.String(prefix)
		input.Delimiter = aws.String("/")
	}
	if marker != "" {
		input.ContinuationToken = aws.String(marker)
	}

	output, err := h.s3Client.ListObjectsV2(ctx, input)
	if err != nil {
		log.Error().Err(err).Str("bucket", bucket).Msg("Failed to list R2 objects")
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to list objects"})
		return
	}

	// Folders (common prefixes)
	var folders []string
	for _, cp := range output.CommonPrefixes {
		folders = append(folders, aws.ToString(cp.Prefix))
	}

	// Objects
	var objects []gin.H
	for _, obj := range output.Contents {
		key := aws.ToString(obj.Key)
		publicURL := fmt.Sprintf("https://%s/%s", domain, key)

		objects = append(objects, gin.H{
			"key":           key,
			"size":          aws.ToInt64(obj.Size),
			"last_modified": obj.LastModified,
			"etag":          strings.Trim(aws.ToString(obj.ETag), "\""),
			"url":           publicURL,
		})
	}

	if objects == nil {
		objects = []gin.H{}
	}
	if folders == nil {
		folders = []string{}
	}

	var nextCursor *string
	if aws.ToBool(output.IsTruncated) {
		nextCursor = output.NextContinuationToken
	}

	c.JSON(http.StatusOK, gin.H{
		"objects":     objects,
		"folders":     folders,
		"bucket":      bucket,
		"prefix":      prefix,
		"next_cursor": nextCursor,
		"count":       len(objects),
	})
}

func (h *AdminHandler) GetStorageObject(c *gin.Context) {
	if h.s3Client == nil {
		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "R2 storage not configured"})
		return
	}

	ctx, cancel := context.WithTimeout(c.Request.Context(), 10*time.Second)
	defer cancel()

	bucket := c.DefaultQuery("bucket", h.mediaBucket)
	key := c.Query("key")
	if key == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "key parameter required"})
		return
	}

	if bucket != h.mediaBucket && bucket != h.videoBucket {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid bucket name"})
		return
	}

	domain := h.imgDomain
	if bucket == h.videoBucket {
		domain = h.vidDomain
	}

	output, err := h.s3Client.HeadObject(ctx, &s3.HeadObjectInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	})
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Object not found"})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"key":           key,
		"bucket":        bucket,
		"size":          aws.ToInt64(output.ContentLength),
		"content_type":  aws.ToString(output.ContentType),
		"last_modified": output.LastModified,
		"etag":          strings.Trim(aws.ToString(output.ETag), "\""),
		"url":           fmt.Sprintf("https://%s/%s", domain, key),
		"cache_control": aws.ToString(output.CacheControl),
	})
}

func (h *AdminHandler) DeleteStorageObject(c *gin.Context) {
	if h.s3Client == nil {
		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "R2 storage not configured"})
		return
	}

	ctx, cancel := context.WithTimeout(c.Request.Context(), 10*time.Second)
	defer cancel()

	adminID, _ := c.Get("user_id")

	var req struct {
		Bucket string `json:"bucket" binding:"required"`
		Key    string `json:"key" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if req.Bucket != h.mediaBucket && req.Bucket != h.videoBucket {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid bucket name"})
		return
	}

	_, err := h.s3Client.DeleteObject(ctx, &s3.DeleteObjectInput{
		Bucket: aws.String(req.Bucket),
		Key:    aws.String(req.Key),
	})
	if err != nil {
		log.Error().Err(err).Str("bucket", req.Bucket).Str("key", req.Key).Msg("Failed to delete R2 object")
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to delete object"})
		return
	}

	// Audit log
	adminUUID, _ := uuid.Parse(adminID.(string))
	h.pool.Exec(ctx, `
		INSERT INTO audit_log (actor_id, action, target_type, target_id, details)
		VALUES ($1, 'admin_delete_storage_object', 'storage', NULL, $2)
	`, adminUUID, fmt.Sprintf(`{"bucket":"%s","key":"%s"}`, req.Bucket, req.Key))

	c.JSON(http.StatusOK, gin.H{"message": "Object deleted"})
}