-- Admin Panel Support Tables

-- Algorithm configuration (key-value store for feed/moderation tuning)
CREATE TABLE IF NOT EXISTS public.algorithm_config (
    key TEXT PRIMARY KEY,
    value TEXT NOT NULL,
    description TEXT,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Seed default algorithm config values
INSERT INTO public.algorithm_config (key, value, description) VALUES
    ('feed_recency_weight', '0.4', 'Weight for post recency in feed ranking'),
    ('feed_engagement_weight', '0.3', 'Weight for engagement metrics (likes, comments)'),
    ('feed_harmony_weight', '0.2', 'Weight for author harmony/trust score'),
    ('feed_diversity_weight', '0.1', 'Weight for content diversity in feed'),
    ('moderation_auto_flag_threshold', '0.7', 'AI score threshold for auto-flagging content'),
    ('moderation_auto_remove_threshold', '0.95', 'AI score threshold for automatic content removal'),
    ('moderation_greed_keyword_threshold', '0.7', 'Keyword-based spam/greed detection threshold'),
    ('feed_max_posts_per_author', '3', 'Max posts from same author in a single feed page'),
    ('feed_boost_mutual_follow', '1.5', 'Multiplier boost for posts from mutual follows'),
    ('feed_beacon_boost', '1.2', 'Multiplier boost for beacon posts in nearby feeds')
ON CONFLICT (key) DO NOTHING;

-- Audit log for admin actions
CREATE TABLE IF NOT EXISTS public.audit_log (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    actor_id UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    action TEXT NOT NULL,
    target_type TEXT NOT NULL,  -- 'user', 'post', 'comment', 'appeal', 'report', 'config'
    target_id UUID,
    details TEXT,  -- JSON string with action-specific details
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_audit_log_created_at ON public.audit_log(created_at DESC);
CREATE INDEX IF NOT EXISTS idx_audit_log_actor_id ON public.audit_log(actor_id);
CREATE INDEX IF NOT EXISTS idx_audit_log_action ON public.audit_log(action);

-- Ensure profiles.role column exists (may already exist from prior migrations)
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'profiles' AND column_name = 'role'
    ) THEN
        ALTER TABLE public.profiles ADD COLUMN role TEXT NOT NULL DEFAULT 'user';
    END IF;
END $$;

-- Ensure profiles.is_verified column exists
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'profiles' AND column_name = 'is_verified'
    ) THEN
        ALTER TABLE public.profiles ADD COLUMN is_verified BOOLEAN DEFAULT FALSE;
    END IF;
END $$;

-- Ensure profiles.is_private column exists
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'profiles' AND column_name = 'is_private'
    ) THEN
        ALTER TABLE public.profiles ADD COLUMN is_private BOOLEAN DEFAULT FALSE;
    END IF;
END $$;

-- Ensure users.status column exists
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'users' AND column_name = 'status'
    ) THEN
        ALTER TABLE public.users ADD COLUMN status TEXT NOT NULL DEFAULT 'active';
    END IF;
END $$;

-- Ensure users.last_login column exists
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public' AND table_name = 'users' AND column_name = 'last_login'
    ) THEN
        ALTER TABLE public.users ADD COLUMN last_login TIMESTAMPTZ;
    END IF;
END $$;