CREATE TABLE IF NOT EXISTS users (
    id TEXT PRIMARY KEY NOT NULL,
    email TEXT NOT NULL UNIQUE,
    password_hash TEXT NOT NULL,
    name TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE UNIQUE INDEX IF NOT EXISTS users_email_lower_idx ON users (lower(email));

CREATE TABLE IF NOT EXISTS galleries (
    id TEXT PRIMARY KEY NOT NULL,
    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    slug TEXT NOT NULL UNIQUE,
    title TEXT NOT NULL,
    client_name TEXT NOT NULL,
    description TEXT NOT NULL DEFAULT '',
    status TEXT NOT NULL DEFAULT 'draft',
    password_hash TEXT,
    downloads_enabled INTEGER NOT NULL DEFAULT 1,
    favorites_enabled INTEGER NOT NULL DEFAULT 1,
    download_all_enabled INTEGER NOT NULL DEFAULT 1,
    watermark_enabled INTEGER NOT NULL DEFAULT 0,
    expires_at TEXT,
    cover_media_id TEXT,
    theme_config TEXT NOT NULL DEFAULT '{}',
    branding_config TEXT NOT NULL DEFAULT '{}',
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    published_at TEXT,
    CONSTRAINT galleries_status_check CHECK (status IN ('draft', 'published', 'archived'))
);

CREATE INDEX IF NOT EXISTS galleries_user_id_created_at_idx ON galleries (user_id, created_at DESC);

CREATE TABLE IF NOT EXISTS media (
    id TEXT PRIMARY KEY NOT NULL,
    gallery_id TEXT NOT NULL REFERENCES galleries(id) ON DELETE CASCADE,
    original_filename TEXT NOT NULL,
    mime_type TEXT NOT NULL,
    file_size INTEGER NOT NULL DEFAULT 0,
    storage_key TEXT NOT NULL,
    external_url TEXT,
    thumbnail_key TEXT,
    preview_key TEXT,
    processing_status TEXT NOT NULL DEFAULT 'UPLOADING',
    processing_error TEXT,
    width INTEGER,
    height INTEGER,
    duration_seconds REAL,
    sort_order INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT media_processing_status_check CHECK (processing_status IN ('UPLOADING', 'PROCESSING', 'READY', 'FAILED'))
);

CREATE INDEX IF NOT EXISTS media_gallery_sort_order_idx ON media (gallery_id, sort_order, id);

CREATE TABLE IF NOT EXISTS favorites (
    id TEXT PRIMARY KEY NOT NULL,
    gallery_id TEXT NOT NULL REFERENCES galleries(id) ON DELETE CASCADE,
    media_id TEXT NOT NULL REFERENCES media(id) ON DELETE CASCADE,
    visitor_id TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    UNIQUE (gallery_id, media_id, visitor_id)
);

CREATE TABLE IF NOT EXISTS downloads (
    id TEXT PRIMARY KEY NOT NULL,
    gallery_id TEXT NOT NULL REFERENCES galleries(id) ON DELETE CASCADE,
    media_id TEXT REFERENCES media(id) ON DELETE SET NULL,
    visitor_id TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS downloads_gallery_created_at_idx ON downloads (gallery_id, created_at DESC);

CREATE TABLE IF NOT EXISTS download_jobs (
    id TEXT PRIMARY KEY NOT NULL,
    gallery_id TEXT NOT NULL REFERENCES galleries(id) ON DELETE CASCADE,
    visitor_id TEXT NOT NULL,
    status TEXT NOT NULL DEFAULT 'QUEUED',
    storage_key TEXT,
    error TEXT,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    completed_at TEXT,
    CONSTRAINT download_jobs_status_check CHECK (status IN ('QUEUED', 'PROCESSING', 'READY', 'FAILED'))
);

CREATE INDEX IF NOT EXISTS download_jobs_gallery_visitor_idx ON download_jobs (gallery_id, visitor_id, created_at DESC);