CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
CREATE EXTENSION IF NOT EXISTS pg_trgm;

CREATE TABLE IF NOT EXISTS root_dirs (
    path TEXT PRIMARY KEY NOT NULL
);

CREATE TABLE IF NOT EXISTS media_items (
    id UUID PRIMARY KEY NOT NULL,
    path TEXT NOT NULL UNIQUE,
    file_name TEXT NOT NULL,
    media_type TEXT NOT NULL,
    content_hash TEXT NOT NULL UNIQUE,
    file_size BIGINT NOT NULL,
    title TEXT,
    artist TEXT,
    album TEXT,
    genre TEXT,
    year INTEGER,
    duration_secs DOUBLE PRECISION,
    description TEXT,
    created_at TIMESTAMPTZ NOT NULL,
    updated_at TIMESTAMPTZ NOT NULL
);

CREATE TABLE IF NOT EXISTS tags (
    id UUID PRIMARY KEY NOT NULL,
    name TEXT NOT NULL,
    parent_id UUID REFERENCES tags(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL
);

CREATE UNIQUE INDEX IF NOT EXISTS idx_tags_name_parent ON tags(name, COALESCE(parent_id, '00000000-0000-0000-0000-000000000000'));

CREATE TABLE IF NOT EXISTS media_tags (
    media_id UUID NOT NULL REFERENCES media_items(id) ON DELETE CASCADE,
    tag_id UUID NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
    PRIMARY KEY (media_id, tag_id)
);

CREATE TABLE IF NOT EXISTS collections (
    id UUID PRIMARY KEY NOT NULL,
    name TEXT NOT NULL,
    description TEXT,
    kind TEXT NOT NULL,
    filter_query TEXT,
    created_at TIMESTAMPTZ NOT NULL,
    updated_at TIMESTAMPTZ NOT NULL
);

CREATE TABLE IF NOT EXISTS collection_members (
    collection_id UUID NOT NULL REFERENCES collections(id) ON DELETE CASCADE,
    media_id UUID NOT NULL REFERENCES media_items(id) ON DELETE CASCADE,
    position INTEGER NOT NULL DEFAULT 0,
    added_at TIMESTAMPTZ NOT NULL,
    PRIMARY KEY (collection_id, media_id)
);

CREATE TABLE IF NOT EXISTS audit_log (
    id UUID PRIMARY KEY NOT NULL,
    media_id UUID REFERENCES media_items(id) ON DELETE SET NULL,
    action TEXT NOT NULL,
    details TEXT,
    timestamp TIMESTAMPTZ NOT NULL
);

CREATE TABLE IF NOT EXISTS custom_fields (
    media_id UUID NOT NULL REFERENCES media_items(id) ON DELETE CASCADE,
    field_name TEXT NOT NULL,
    field_type TEXT NOT NULL,
    field_value TEXT NOT NULL,
    PRIMARY KEY (media_id, field_name)
);