-- 多账号迁移脚本（在已有库上执行一次）
-- 目标：
-- 1) 新增 accounts 表（存加密后的 API KEY/SECRET）
-- 2) trading_config/trades/account_snapshots 增加 account_id（默认=1）
-- 3) trading_config 的唯一约束从 config_key 改为 (account_id, config_key)
--
-- ⚠️ 注意：
-- - 不同 MySQL 版本对 "ADD COLUMN IF NOT EXISTS" 支持不一致，因此这里用 INFORMATION_SCHEMA + 动态SQL。
-- - 执行前建议先备份数据库。

USE `auto_trade_sys`;

-- 1) accounts 表
CREATE TABLE IF NOT EXISTS `accounts` (
  `id` INT PRIMARY KEY AUTO_INCREMENT,
  `name` VARCHAR(100) NOT NULL,
  `status` VARCHAR(20) DEFAULT 'active' COMMENT 'active, disabled',
  `api_key_enc` TEXT NULL COMMENT '加密后的 API KEY（enc:v1:...）',
  `api_secret_enc` TEXT NULL COMMENT '加密后的 API SECRET（enc:v1:...）',
  `use_testnet` BOOLEAN DEFAULT FALSE,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='账号表（多账号）';

INSERT INTO `accounts` (`id`, `name`, `status`, `use_testnet`)
VALUES (1, 'default', 'active', false)
ON DUPLICATE KEY UPDATE `name`=VALUES(`name`);

-- 2) trading_config.account_id
SET @has_col := (
  SELECT COUNT(1)
  FROM INFORMATION_SCHEMA.COLUMNS
  WHERE TABLE_SCHEMA = DATABASE()
    AND TABLE_NAME = 'trading_config'
    AND COLUMN_NAME = 'account_id'
);
SET @sql := IF(@has_col = 0, 'ALTER TABLE trading_config ADD COLUMN account_id INT NOT NULL DEFAULT 1 AFTER id', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 3) trades.account_id
SET @has_col := (
  SELECT COUNT(1)
  FROM INFORMATION_SCHEMA.COLUMNS
  WHERE TABLE_SCHEMA = DATABASE()
    AND TABLE_NAME = 'trades'
    AND COLUMN_NAME = 'account_id'
);
SET @sql := IF(@has_col = 0, 'ALTER TABLE trades ADD COLUMN account_id INT NOT NULL DEFAULT 1 AFTER id', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 4) account_snapshots.account_id
SET @has_col := (
  SELECT COUNT(1)
  FROM INFORMATION_SCHEMA.COLUMNS
  WHERE TABLE_SCHEMA = DATABASE()
    AND TABLE_NAME = 'account_snapshots'
    AND COLUMN_NAME = 'account_id'
);
SET @sql := IF(@has_col = 0, 'ALTER TABLE account_snapshots ADD COLUMN account_id INT NOT NULL DEFAULT 1 AFTER id', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 5) trading_config 唯一键：改为 (account_id, config_key)
-- 尝试删除旧 UNIQUE(config_key)（名字可能是 config_key 或其他）
SET @idx_name := (
  SELECT INDEX_NAME
  FROM INFORMATION_SCHEMA.STATISTICS
  WHERE TABLE_SCHEMA = DATABASE()
    AND TABLE_NAME = 'trading_config'
    AND NON_UNIQUE = 0
    AND COLUMN_NAME = 'config_key'
  LIMIT 1
);
SET @sql := IF(@idx_name IS NOT NULL, CONCAT('ALTER TABLE trading_config DROP INDEX ', @idx_name), 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 添加新唯一键（如果不存在）
SET @has_uk := (
  SELECT COUNT(1)
  FROM INFORMATION_SCHEMA.STATISTICS
  WHERE TABLE_SCHEMA = DATABASE()
    AND TABLE_NAME = 'trading_config'
    AND INDEX_NAME = 'uk_account_config_key'
);
SET @sql := IF(@has_uk = 0, 'ALTER TABLE trading_config ADD UNIQUE KEY uk_account_config_key (account_id, config_key)', 'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 6) 索引（可选，老版本 MySQL 不支持 IF NOT EXISTS，可忽略报错后手动检查）
-- 如果你看到 “Duplicate key name” 可直接忽略。
CREATE INDEX idx_trades_account_id ON trades(account_id);
CREATE INDEX idx_account_snapshots_account_id ON account_snapshots(account_id);