CREATE TABLE IF NOT EXISTS users (
  id BIGSERIAL PRIMARY KEY, username TEXT UNIQUE NOT NULL,
  password_hash TEXT NOT NULL, role TEXT NOT NULL CHECK (role IN ('admin','member')),
  created_at TIMESTAMPTZ NOT NULL DEFAULT now());
CREATE TABLE IF NOT EXISTS libraries (
  id BIGSERIAL PRIMARY KEY, name TEXT NOT NULL, root_path TEXT UNIQUE NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now());
CREATE TABLE IF NOT EXISTS books (
  id BIGSERIAL PRIMARY KEY, library_id BIGINT NOT NULL REFERENCES libraries(id),
  path TEXT NOT NULL, title TEXT NOT NULL,
  format TEXT NOT NULL CHECK (format IN ('cbz','pdf','epub','txt','md')),
  file_size BIGINT NOT NULL, mod_ts BIGINT NOT NULL, page_count INT NOT NULL DEFAULT 0,
  state TEXT NOT NULL DEFAULT 'ready' CHECK (state IN ('ready','error')),
  error_msg TEXT NOT NULL DEFAULT '', added_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  UNIQUE (library_id, path));
CREATE TABLE IF NOT EXISTS reading_progress (
  user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  library_id BIGINT NOT NULL, book_path TEXT NOT NULL,
  locator JSONB NOT NULL DEFAULT '{}', percent DOUBLE PRECISION NOT NULL DEFAULT 0,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  PRIMARY KEY (user_id, library_id, book_path));
CREATE TABLE IF NOT EXISTS bookmarks (
  id BIGSERIAL PRIMARY KEY,
  user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  library_id BIGINT NOT NULL, book_path TEXT NOT NULL,
  locator JSONB NOT NULL, percent DOUBLE PRECISION NOT NULL DEFAULT 0,
  note TEXT NOT NULL DEFAULT '',
  created_at TIMESTAMPTZ NOT NULL DEFAULT now());
CREATE INDEX IF NOT EXISTS bookmarks_user_book_idx ON bookmarks (user_id, library_id, book_path);