package relation

import (
	"Open_IM/pkg/common/config"
	"fmt"
	"time"

	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

func NewGormDB() (*gorm.DB, error) {
	dsn := fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true&loc=Local",
		config.Config.Mysql.DBUserName, config.Config.Mysql.DBPassword, config.Config.Mysql.DBAddress[0], "mysql")
	db, err := gorm.Open(mysql.Open(dsn), nil)
	if err != nil {
		time.Sleep(time.Duration(30) * time.Second)
		db, err = gorm.Open(mysql.Open(dsn), nil)
		if err != nil {
			panic(err.Error() + " open failed " + dsn)
		}
	}
	sqlDB, err := db.DB()
	if err != nil {
		return nil, err
	}
	defer sqlDB.Close()
	sql := fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s default charset utf8 COLLATE utf8_general_ci;", config.Config.Mysql.DBDatabaseName)
	err = db.Exec(sql).Error
	if err != nil {
		return nil, fmt.Errorf("init db %w", err)
	}
	dsn = fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true&loc=Local",
		config.Config.Mysql.DBUserName, config.Config.Mysql.DBPassword, config.Config.Mysql.DBAddress[0], config.Config.Mysql.DBDatabaseName)
	newLogger := logger.New(
		Writer{},
		logger.Config{
			SlowThreshold:             time.Duration(config.Config.Mysql.SlowThreshold) * time.Millisecond, // Slow SQL threshold
			LogLevel:                  logger.LogLevel(config.Config.Mysql.LogLevel),                       // Log level
			IgnoreRecordNotFoundError: true,                                                                // Ignore ErrRecordNotFound error for logger
			Colorful:                  true,                                                                // Disable color
		},
	)
	db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{
		Logger: newLogger,
	})
	if err != nil {
		return nil, err
	}
	sqlDB, err = db.DB()
	if err != nil {
		return nil, err
	}
	sqlDB.SetConnMaxLifetime(time.Second * time.Duration(config.Config.Mysql.DBMaxLifeTime))
	sqlDB.SetMaxOpenConns(config.Config.Mysql.DBMaxOpenConns)
	sqlDB.SetMaxIdleConns(config.Config.Mysql.DBMaxIdleConns)
	return db, nil
}

type Mysql struct {
	gormConn *gorm.DB
}

func (m *Mysql) GormConn() *gorm.DB {
	return m.gormConn
}

//func (m *Mysql) SetGormConn(gormConn *gorm.DB) {
//	m.gormConn = gormConn
//}
//
//func (m *Mysql) InitConn() *Mysql {
//	dsn := fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true&loc=Local",
//		config.Config.Mysql.DBUserName, config.Config.Mysql.DBPassword, config.Config.Mysql.DBAddress[0], "mysql")
//	var db *gorm.DB
//	db, err := gorm.Open(mysql.Open(dsn), nil)
//	if err != nil {
//		time.Sleep(time.Duration(30) * time.Second)
//		db, err = gorm.Open(mysql.Open(dsn), nil)
//		if err != nil {
//			panic(err.Error() + " open failed " + dsn)
//		}
//	}
//	sql := fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s default charset utf8 COLLATE utf8_general_ci;", config.Config.Mysql.DBDatabaseName)
//	err = db.Exec(sql).Error
//	if err != nil {
//		panic(err.Error() + " Exec failed:" + sql)
//	}
//	dsn = fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=true&loc=Local",
//		config.Config.Mysql.DBUserName, config.Config.Mysql.DBPassword, config.Config.Mysql.DBAddress[0], config.Config.Mysql.DBDatabaseName)
//	newLogger := logger.New(
//		Writer{},
//		logger.Config{
//			SlowThreshold:             time.Duration(config.Config.Mysql.SlowThreshold) * time.Millisecond, // Slow SQL threshold
//			LogLevel:                  logger.LogLevel(config.Config.Mysql.LogLevel),                       // Log level
//			IgnoreRecordNotFoundError: true,                                                                // Ignore ErrRecordNotFound error for logger
//			Colorful:                  true,                                                                // Disable color
//		},
//	)
//	db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{
//		Logger: newLogger,
//	})
//	if err != nil {
//		panic(err.Error() + " Open failed " + dsn)
//	}
//	sqlDB, err := db.DB()
//	if err != nil {
//		panic(err.Error() + " DB.DB() failed ")
//	}
//	sqlDB.SetConnMaxLifetime(time.Second * time.Duration(config.Config.Mysql.DBMaxLifeTime))
//	sqlDB.SetMaxOpenConns(config.Config.Mysql.DBMaxOpenConns)
//	sqlDB.SetMaxIdleConns(config.Config.Mysql.DBMaxIdleConns)
//	if db == nil {
//		panic("db is nil")
//	}
//	m.SetGormConn(db)
//	return m
//}

//models := []interface{}{&Friend{}, &FriendRequest{}, &Group{}, &GroupMember{}, &GroupRequest{},
//	&User{}, &Black{}, &ChatLog{}, &Conversation{}, &AppVersion{}}

//func (m *Mysql) AutoMigrateModel(model interface{}) error {
//	err := m.gormConn.AutoMigrate(model)
//	if err != nil {
//		return err
//	}
//	m.gormConn.Set("gorm:table_options", "CHARSET=utf8")
//	m.gormConn.Set("gorm:table_options", "collation=utf8_unicode_ci")
//	_ = m.gormConn.Migrator().CreateTable(model)
//	return nil
//}

type Writer struct{}

func (w Writer) Printf(format string, args ...interface{}) {
	fmt.Printf(format, args...)
}

func getDBConn(db *gorm.DB, tx []any) *gorm.DB {
	if len(tx) > 0 {
		if txDB, ok := tx[0].(*gorm.DB); ok {
			return txDB
		}
	}
	return db
}