CREATE SEQUENCE IF NOT EXISTS users_id_seq;
CREATE SEQUENCE IF NOT EXISTS sources_id_seq;
CREATE SEQUENCE IF NOT EXISTS source_runs_id_seq;
CREATE SEQUENCE IF NOT EXISTS entries_id_seq;
CREATE SEQUENCE IF NOT EXISTS tags_id_seq;
CREATE SEQUENCE IF NOT EXISTS comments_id_seq;
CREATE SEQUENCE IF NOT EXISTS audit_logs_id_seq;

CREATE TABLE IF NOT EXISTS users (
  id INTEGER PRIMARY KEY DEFAULT nextval('users_id_seq'),
  username VARCHAR UNIQUE NOT NULL,
  password_hash VARCHAR NOT NULL,
  role VARCHAR NOT NULL DEFAULT 'editor',
  status VARCHAR NOT NULL DEFAULT 'active',
  last_login_at TIMESTAMPTZ
);

CREATE TABLE IF NOT EXISTS sources (
  id INTEGER PRIMARY KEY DEFAULT nextval('sources_id_seq'),
  kind VARCHAR NOT NULL,
  name VARCHAR UNIQUE NOT NULL,
  enabled BOOLEAN NOT NULL DEFAULT TRUE,
  url VARCHAR,
  adapter VARCHAR,
  cron_expr VARCHAR DEFAULT '0 9 * * 1',
  api_key_hash VARCHAR,
  api_key VARCHAR,
  direct_publish BOOLEAN NOT NULL DEFAULT FALSE,
  last_run_at TIMESTAMPTZ,
  last_run_status VARCHAR
);

CREATE TABLE IF NOT EXISTS source_runs (
  id INTEGER PRIMARY KEY DEFAULT nextval('source_runs_id_seq'),
  source_id INTEGER NOT NULL REFERENCES sources(id),
  started_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  finished_at TIMESTAMPTZ,
  status VARCHAR,
  found INTEGER DEFAULT 0,
  created INTEGER DEFAULT 0,
  skipped INTEGER DEFAULT 0,
  error TEXT
);

CREATE TABLE IF NOT EXISTS tags (
  id INTEGER PRIMARY KEY DEFAULT nextval('tags_id_seq'),
  name VARCHAR NOT NULL,
  parent_id INTEGER REFERENCES tags(id),
  sort INTEGER NOT NULL DEFAULT 0
);

CREATE TABLE IF NOT EXISTS entries (
  id INTEGER PRIMARY KEY DEFAULT nextval('entries_id_seq'),
  title VARCHAR NOT NULL,
  slug VARCHAR UNIQUE NOT NULL,
  type VARCHAR NOT NULL,
  summary VARCHAR DEFAULT '',
  description_md TEXT DEFAULT '',
  url VARCHAR DEFAULT '',
  license VARCHAR DEFAULT '',
  stars BIGINT DEFAULT 0,
  status VARCHAR NOT NULL DEFAULT 'pending',
  source_id INTEGER REFERENCES sources(id),
  verified_at TIMESTAMPTZ,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS entry_tags (
  entry_id INTEGER NOT NULL REFERENCES entries(id),
  tag_id INTEGER NOT NULL REFERENCES tags(id),
  PRIMARY KEY (entry_id, tag_id)
);

CREATE TABLE IF NOT EXISTS comments (
  id INTEGER PRIMARY KEY DEFAULT nextval('comments_id_seq'),
  entry_id INTEGER NOT NULL REFERENCES entries(id),
  user_id INTEGER REFERENCES users(id),
  author_name VARCHAR NOT NULL,
  body TEXT NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS audit_logs (
  id INTEGER PRIMARY KEY DEFAULT nextval('audit_logs_id_seq'),
  actor VARCHAR NOT NULL,
  action VARCHAR NOT NULL,
  target VARCHAR DEFAULT '',
  detail TEXT DEFAULT '',
  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);