package storage

import (
	"fmt"
	"log"
	"time"

	"git.apinb.com/quant/collector/models"
	"gorm.io/driver/postgres"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

// Storage 数据库存储器
type Storage struct {
	db *gorm.DB
}

// NewStorage 创建新的数据库连接
func NewStorage(connStr string) (*Storage, error) {
	// 配置GORM日志
	newLogger := logger.New(
		log.New(log.Writer(), "\r\n", log.LstdFlags),
		logger.Config{
			SlowThreshold:             time.Second,
			LogLevel:                  logger.Warn,
			IgnoreRecordNotFoundError: true,
			Colorful:                  true,
		},
	)

	db, err := gorm.Open(postgres.Open(connStr), &gorm.Config{
		Logger: newLogger,
	})
	if err != nil {
		return nil, fmt.Errorf("打开数据库连接失败: %w", err)
	}

	// 获取底层的sql.DB以设置连接池
	sqlDB, err := db.DB()
	if err != nil {
		return nil, fmt.Errorf("获取数据库实例失败: %w", err)
	}

	// 设置连接池参数
	sqlDB.SetMaxOpenConns(25)
	sqlDB.SetMaxIdleConns(5)
	sqlDB.SetConnMaxLifetime(5 * time.Minute)

	log.Println("数据库连接成功")
	return &Storage{db: db}, nil
}

// Close 关闭数据库连接
func (s *Storage) Close() error {
	if s.db != nil {
		sqlDB, err := s.db.DB()
		if err != nil {
			return err
		}
		return sqlDB.Close()
	}
	return nil
}

// AutoMigrate 自动迁移数据库表结构
func (s *Storage) AutoMigrate() error {
	log.Println("开始自动迁移数据库表结构...")

	err := s.db.AutoMigrate(
		&models.AssetSnapshot{},
		&models.OrderRecord{},
		&models.PositionRecord{},
		&models.TickRecord{},
		&models.CollectionLog{},
	)

	if err != nil {
		return fmt.Errorf("自动迁移失败: %w", err)
	}

	log.Println("数据库表结构迁移完成")
	return nil
}

// SaveStatus 保存完整状态数据(使用事务)
func (s *Storage) SaveStatus(status *models.Status, dataHash string) error {
	return s.db.Transaction(func(tx *gorm.DB) error {
		// 保存资产快照
		asset := models.AssetSnapshot{
			AccountID:   status.Data.Assets.AccountID,
			Cash:        status.Data.Assets.Cash,
			FrozenCash:  status.Data.Assets.FrozenCash,
			MarketValue: status.Data.Assets.MarketValue,
			Profit:      status.Data.Assets.Profit,
			TotalAsset:  status.Data.Assets.TotalAsset,
			DataHash:    dataHash,
			CollectedAt: time.Now(),
		}
		if err := tx.Create(&asset).Error; err != nil {
			return fmt.Errorf("保存资产快照失败: %w", err)
		}

		// 批量保存订单
		if len(status.Data.Orders) > 0 {
			orders := make([]models.OrderRecord, 0, len(status.Data.Orders))
			for _, order := range status.Data.Orders {
				orders = append(orders, models.OrderRecord{
					OrderID:      order.OrderID,
					AccountID:    status.Data.Assets.AccountID,
					StockCode:    order.StockCode,
					Price:        order.Price,
					Volume:       order.Volume,
					TradedPrice:  order.TradedPrice,
					TradedVolume: order.TradedVolume,
					OrderStatus:  order.OrderStatus,
					OrderTime:    order.OrderTime,
					OrderRemark:  order.OrderRemark,
					DataHash:     dataHash,
					CollectedAt:  time.Now(),
				})
			}
			if err := tx.CreateInBatches(orders, 100).Error; err != nil {
				return fmt.Errorf("保存订单失败: %w", err)
			}
		}

		// 批量保存持仓
		if len(status.Data.Positions) > 0 {
			positions := make([]models.PositionRecord, 0, len(status.Data.Positions))
			for _, pos := range status.Data.Positions {
				positions = append(positions, models.PositionRecord{
					AccountID:     status.Data.Assets.AccountID,
					Code:          pos.Code,
					Volume:        pos.Volume,
					CanUseVolume:  pos.CanUseVolume,
					FrozenVolume:  pos.FrozenVolume,
					AvgPrice:      pos.AvgPrice,
					OpenPrice:     pos.OpenPrice,
					CurrentPrice:  pos.CurrentPrice,
					MarketValue:   pos.MarketValue,
					Profit:        pos.Profit,
					ProfitRate:    pos.ProfitRate,
					MinProfitRate: pos.MinProfitRate,
					DataHash:      dataHash,
					CollectedAt:   time.Now(),
				})
			}
			if err := tx.CreateInBatches(positions, 100).Error; err != nil {
				return fmt.Errorf("保存持仓失败: %w", err)
			}
		}

		// 批量保存行情数据
		if len(status.Data.TickData) > 0 {
			ticks := make([]models.TickRecord, 0, len(status.Data.TickData))
			for code, tick := range status.Data.TickData {
				ticks = append(ticks, models.TickRecord{
					StockCode:   code,
					LastPrice:   tick.LastPrice,
					Open:        tick.Open,
					High:        tick.High,
					Low:         tick.Low,
					LastClose:   tick.LastClose,
					Volume:      tick.Volume,
					Amount:      tick.Amount,
					PVolume:     tick.PVolume,
					BidPrices:   tick.BidPrice,
					BidVolumes:  tick.BidVol,
					AskPrices:   tick.AskPrice,
					AskVolumes:  tick.AskVol,
					Time:        tick.Time,
					TimeTag:     tick.TimeTag,
					StockStatus: tick.StockStatus,
					DataHash:    dataHash,
					CollectedAt: time.Now(),
				})
			}
			if err := tx.CreateInBatches(ticks, 100).Error; err != nil {
				return fmt.Errorf("保存行情数据失败: %w", err)
			}
		}

		return nil
	})
}

// SaveCollectionLog 保存采集日志
func (s *Storage) SaveCollectionLog(dataHash string, hasChanged bool, statusMessage string) error {
	log := models.CollectionLog{
		DataHash:      dataHash,
		HasChanged:    hasChanged,
		StatusMessage: statusMessage,
		CollectedAt:   time.Now(),
	}

	if err := s.db.Create(&log).Error; err != nil {
		return fmt.Errorf("保存采集日志失败: %w", err)
	}

	return nil
}

// GetDB 获取GORM DB实例(用于高级查询)
func (s *Storage) GetDB() *gorm.DB {
	return s.db
}