-- Migration: Add reposts, profile_layouts, and post_feed_scores tables
-- Also adds engagement count columns to posts for feed algorithm

-- ─── Engagement columns on posts ──────────────────────────────────────────────
ALTER TABLE public.posts
    ADD COLUMN IF NOT EXISTS like_count    INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS comment_count INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS share_count   INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS repost_count  INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS boost_count   INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS amplify_count INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS view_count    INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS video_url     TEXT;

-- Backfill existing like/comment/view counts from post_metrics
UPDATE public.posts p
SET
    like_count    = COALESCE(m.like_count, 0),
    comment_count = COALESCE(m.comment_count, 0),
    view_count    = COALESCE(m.view_count, 0)
FROM public.post_metrics m
WHERE p.id = m.post_id;

-- ─── Reposts ──────────────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS public.reposts (
    id               UUID        PRIMARY KEY DEFAULT uuid_generate_v4(),
    original_post_id UUID        NOT NULL REFERENCES public.posts(id) ON DELETE CASCADE,
    author_id        UUID        NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    type             TEXT        NOT NULL CHECK (type IN ('standard', 'quote', 'boost', 'amplify')),
    comment          TEXT,
    metadata         JSONB,
    created_at       TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- One repost per type per user per post
CREATE UNIQUE INDEX IF NOT EXISTS idx_reposts_unique
    ON public.reposts (original_post_id, author_id, type);

CREATE INDEX IF NOT EXISTS idx_reposts_original_post_id ON public.reposts (original_post_id);
CREATE INDEX IF NOT EXISTS idx_reposts_author_id        ON public.reposts (author_id);
CREATE INDEX IF NOT EXISTS idx_reposts_created_at       ON public.reposts (created_at DESC);

-- ─── Repost reports ───────────────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS public.repost_reports (
    id          UUID        PRIMARY KEY DEFAULT uuid_generate_v4(),
    repost_id   UUID        NOT NULL REFERENCES public.reposts(id) ON DELETE CASCADE,
    reporter_id UUID        NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    reason      TEXT        NOT NULL,
    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE (repost_id, reporter_id)
);

-- ─── Profile widget layouts ───────────────────────────────────────────────────
CREATE TABLE IF NOT EXISTS public.profile_layouts (
    user_id          UUID        PRIMARY KEY REFERENCES public.profiles(id) ON DELETE CASCADE,
    widgets          JSONB       NOT NULL DEFAULT '[]',
    theme            VARCHAR(50) NOT NULL DEFAULT 'default',
    accent_color     VARCHAR(20),
    banner_image_url TEXT,
    updated_at       TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- ─── Post feed scores (feed algorithm) ───────────────────────────────────────
CREATE TABLE IF NOT EXISTS public.post_feed_scores (
    post_id          UUID             PRIMARY KEY REFERENCES public.posts(id) ON DELETE CASCADE,
    score            DOUBLE PRECISION NOT NULL DEFAULT 0,
    engagement_score DOUBLE PRECISION NOT NULL DEFAULT 0,
    quality_score    DOUBLE PRECISION NOT NULL DEFAULT 0,
    recency_score    DOUBLE PRECISION NOT NULL DEFAULT 0,
    network_score    DOUBLE PRECISION NOT NULL DEFAULT 0,
    personalization  DOUBLE PRECISION NOT NULL DEFAULT 0,
    updated_at       TIMESTAMPTZ      NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_post_feed_scores_score ON public.post_feed_scores (score DESC);