-- Telegram Bot Rolling Summary Schema
-- D1 Database for Cloudflare Workers

-- 사용자 테이블
CREATE TABLE IF NOT EXISTS users (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  telegram_id TEXT UNIQUE NOT NULL,
  username TEXT,
  first_name TEXT,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

-- 메시지 버퍼 (요약 전 임시 저장)
CREATE TABLE IF NOT EXISTS message_buffer (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL,
  chat_id TEXT NOT NULL,
  role TEXT NOT NULL CHECK(role IN ('user', 'bot')),
  message TEXT NOT NULL,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id)
);

-- 요약 저장 테이블 (슬라이딩 윈도우: 최대 3개만 유지)
CREATE TABLE IF NOT EXISTS summaries (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL,
  chat_id TEXT NOT NULL,
  generation INTEGER NOT NULL DEFAULT 1,
  summary TEXT NOT NULL,
  message_count INTEGER NOT NULL,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id)
);

-- 도메인 소유권 테이블
CREATE TABLE IF NOT EXISTS user_domains (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL,
  domain TEXT UNIQUE NOT NULL,
  verified INTEGER DEFAULT 0,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id)
);

-- 예치금 계정 테이블
CREATE TABLE IF NOT EXISTS user_deposits (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL UNIQUE,
  balance INTEGER NOT NULL DEFAULT 0,
  version INTEGER NOT NULL DEFAULT 1,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id)
);

-- 은행 입금 알림 테이블 (SMS → 메일 → 파싱)
CREATE TABLE IF NOT EXISTS bank_notifications (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  bank_name TEXT,
  depositor_name TEXT NOT NULL,
  depositor_name_prefix TEXT,
  amount INTEGER NOT NULL,
  balance_after INTEGER,
  transaction_time DATETIME,
  raw_message TEXT,
  matched_transaction_id INTEGER,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (matched_transaction_id) REFERENCES deposit_transactions(id)
);

-- 예치금 거래 내역 테이블
CREATE TABLE IF NOT EXISTS deposit_transactions (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL,
  type TEXT NOT NULL CHECK(type IN ('deposit', 'withdrawal', 'refund')),
  amount INTEGER NOT NULL,
  status TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending', 'confirmed', 'rejected', 'cancelled')),
  depositor_name TEXT,
  depositor_name_prefix TEXT,
  description TEXT,
  confirmed_at DATETIME,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id)
);

-- 서버 주문 테이블
CREATE TABLE IF NOT EXISTS server_orders (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL,
  telegram_user_id TEXT NOT NULL,
  spec_id INTEGER NOT NULL,
  region TEXT NOT NULL,
  label TEXT,
  price_paid INTEGER NOT NULL,
  status TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending', 'provisioning', 'active', 'failed', 'cancelled', 'terminated')),
  provider TEXT NOT NULL CHECK(provider IN ('linode', 'vultr', 'anvil')),
  provider_instance_id TEXT,
  ip_address TEXT,
  root_password TEXT,
  error_message TEXT,
  provisioned_at DATETIME,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  idempotency_key TEXT UNIQUE,
  FOREIGN KEY (user_id) REFERENCES users(id)
);

-- 사용자 서버 테이블 (활성 서버 관리)
CREATE TABLE IF NOT EXISTS user_servers (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  user_id INTEGER NOT NULL,
  order_id INTEGER NOT NULL UNIQUE,
  provider TEXT NOT NULL,
  instance_id TEXT NOT NULL,
  label TEXT,
  ip_address TEXT,
  region TEXT,
  spec_label TEXT,
  monthly_price INTEGER,
  status TEXT NOT NULL DEFAULT 'active' CHECK(status IN ('active', 'stopped', 'terminated')),
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  FOREIGN KEY (user_id) REFERENCES users(id),
  FOREIGN KEY (order_id) REFERENCES server_orders(id)
);

-- 서버 관리 세션 테이블
CREATE TABLE IF NOT EXISTS server_sessions (
  user_id TEXT PRIMARY KEY,
  status TEXT NOT NULL DEFAULT 'idle',
  collected_info TEXT NOT NULL DEFAULT '{}',
  messages TEXT NOT NULL DEFAULT '[]',
  created_at INTEGER NOT NULL,
  updated_at INTEGER NOT NULL,
  expires_at INTEGER NOT NULL
);

-- 인덱스
CREATE INDEX IF NOT EXISTS idx_user_domains_user ON user_domains(user_id);
CREATE INDEX IF NOT EXISTS idx_user_domains_domain ON user_domains(domain);
CREATE INDEX IF NOT EXISTS idx_deposits_user ON user_deposits(user_id);
CREATE INDEX IF NOT EXISTS idx_deposits_user_version ON user_deposits(user_id, version);
CREATE INDEX IF NOT EXISTS idx_transactions_user ON deposit_transactions(user_id);
CREATE INDEX IF NOT EXISTS idx_transactions_status ON deposit_transactions(status, created_at DESC);
CREATE INDEX IF NOT EXISTS idx_transactions_prefix_pending ON deposit_transactions(status, type, depositor_name_prefix, amount, created_at) WHERE status = 'pending' AND type = 'deposit';
CREATE INDEX IF NOT EXISTS idx_bank_notifications_prefix_unmatched ON bank_notifications(depositor_name_prefix, amount, created_at DESC) WHERE matched_transaction_id IS NULL;
CREATE INDEX IF NOT EXISTS idx_buffer_user ON message_buffer(user_id);
CREATE INDEX IF NOT EXISTS idx_buffer_chat ON message_buffer(user_id, chat_id);
CREATE INDEX IF NOT EXISTS idx_summary_user ON summaries(user_id, chat_id);
CREATE INDEX IF NOT EXISTS idx_summary_latest ON summaries(user_id, chat_id, generation DESC);
CREATE INDEX IF NOT EXISTS idx_users_telegram ON users(telegram_id);
CREATE INDEX IF NOT EXISTS idx_server_orders_user ON server_orders(user_id);
CREATE INDEX IF NOT EXISTS idx_server_orders_status ON server_orders(status);
CREATE INDEX IF NOT EXISTS idx_server_orders_idempotency ON server_orders(idempotency_key) WHERE idempotency_key IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_user_servers_user ON user_servers(user_id);
CREATE INDEX IF NOT EXISTS idx_user_servers_status ON user_servers(status);
CREATE INDEX IF NOT EXISTS idx_server_sessions_expires ON server_sessions(expires_at);