PRAGMA foreign_keys = ON;

CREATE TABLE IF NOT EXISTS users (
  id TEXT PRIMARY KEY,
  openid TEXT NOT NULL UNIQUE,
  unionid TEXT,
  phone TEXT,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  last_login_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE UNIQUE INDEX IF NOT EXISTS users_phone_unique_idx
ON users(phone)
WHERE phone IS NOT NULL AND phone <> '';

CREATE TABLE IF NOT EXISTS project_categories (
  id TEXT PRIMARY KEY,
  name TEXT NOT NULL,
  sort INTEGER NOT NULL DEFAULT 0,
  status TEXT NOT NULL DEFAULT 'active',
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS projects (
  id TEXT PRIMARY KEY,
  category_id TEXT NOT NULL REFERENCES project_categories(id),
  name TEXT NOT NULL,
  subtitle TEXT NOT NULL DEFAULT '',
  price_text TEXT NOT NULL,
  image TEXT NOT NULL DEFAULT '',
  status TEXT NOT NULL DEFAULT 'active',
  sort INTEGER NOT NULL DEFAULT 0,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS app_config (
  config_key TEXT PRIMARY KEY,
  config_value TEXT NOT NULL DEFAULT '',
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS schedule_days (
  id TEXT PRIMARY KEY,
  project_id TEXT NOT NULL REFERENCES projects(id),
  date TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'available',
  note TEXT NOT NULL DEFAULT '',
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  UNIQUE(project_id, date)
);

CREATE TABLE IF NOT EXISTS time_slots (
  id TEXT PRIMARY KEY,
  schedule_day_id TEXT NOT NULL REFERENCES schedule_days(id),
  start_time TEXT NOT NULL,
  end_time TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'available',
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  UNIQUE(schedule_day_id, start_time)
);

CREATE TABLE IF NOT EXISTS bookings (
  id TEXT PRIMARY KEY,
  user_id TEXT REFERENCES users(id),
  project_id TEXT NOT NULL REFERENCES projects(id),
  slot_id TEXT NOT NULL REFERENCES time_slots(id),
  phone TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'pending',
  remark TEXT NOT NULL DEFAULT '',
  confirm_token TEXT NOT NULL,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS price_inquiries (
  id TEXT PRIMARY KEY,
  user_id TEXT REFERENCES users(id),
  phone TEXT NOT NULL,
  province TEXT NOT NULL,
  city TEXT NOT NULL,
  district TEXT NOT NULL,
  project_name TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'pending',
  remark TEXT NOT NULL DEFAULT '',
  last_submitted_at TEXT NOT NULL DEFAULT (STRFTIME('%Y-%m-%d %H:%M:%f', 'now', '+8 hours')),
  created_at TEXT NOT NULL DEFAULT (STRFTIME('%Y-%m-%d %H:%M:%f', 'now', '+8 hours')),
  updated_at TEXT NOT NULL DEFAULT (STRFTIME('%Y-%m-%d %H:%M:%f', 'now', '+8 hours'))
);

CREATE UNIQUE INDEX IF NOT EXISTS price_inquiries_phone_unique_idx
ON price_inquiries(phone);

CREATE UNIQUE INDEX IF NOT EXISTS bookings_effective_unique_idx
ON bookings(phone, project_id, slot_id)
WHERE status IN ('pending', 'confirmed');

CREATE TABLE IF NOT EXISTS config_audit_logs (
  id TEXT PRIMARY KEY,
  admin_id TEXT NOT NULL,
  target_type TEXT NOT NULL,
  target_id TEXT NOT NULL,
  action TEXT NOT NULL,
  before_json TEXT NOT NULL DEFAULT '{}',
  after_json TEXT NOT NULL DEFAULT '{}',
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS projects_category_idx ON projects(category_id, sort);
CREATE INDEX IF NOT EXISTS schedule_days_project_date_idx ON schedule_days(project_id, date);
CREATE INDEX IF NOT EXISTS time_slots_day_idx ON time_slots(schedule_day_id, start_time);
CREATE INDEX IF NOT EXISTS bookings_phone_idx ON bookings(phone, created_at DESC);
CREATE INDEX IF NOT EXISTS bookings_status_idx ON bookings(status, created_at DESC);
CREATE INDEX IF NOT EXISTS price_inquiries_region_idx ON price_inquiries(province, city, district, created_at DESC);