// Package define ...
//
// Description : define ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2024-08-20 17:36
package database

import (
	"context"
	"fmt"
	"git.zhangdeman.cn/zhangdeman/consts"
	"git.zhangdeman.cn/zhangdeman/database/define"
	"git.zhangdeman.cn/zhangdeman/logger/wrapper"
	"go.uber.org/zap"
	"gorm.io/driver/mysql"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	gormLogger "gorm.io/gorm/logger"
)

// DBClient 包装日志实例
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 3:09 PM 2021/12/24
type DBClient struct {
	DbFlag         string        // 数据库标识
	LoggerInstance *zap.Logger   // 日志实例
	master         *gorm.DB      // 主库
	slave          *gorm.DB      // 从库
	ExtraFieldList []string      // 提取的字段
	Cfg            define.Driver // 数据库配置
}

// Init 初始化客户端
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 17:44 2024/8/20
func (dc *DBClient) Init(databaseConfig *define.Database) error {
	var err error
	if dc.master, err = dc.GetDatabaseClient(databaseConfig.Master, dc.LoggerInstance); nil != err {
		return err
	}
	if dc.slave, err = dc.GetDatabaseClient(databaseConfig.Slave, dc.LoggerInstance); nil != err {
		return err
	}
	return nil
}

// GetMaster 获取主库连接
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 3:28 PM 2021/12/24
func (dc *DBClient) GetMaster(ctx context.Context) *gorm.DB {
	session := dc.master.Session(&gorm.Session{})
	session.Logger = dc.getLogger(ctx, session, "master")
	return session
}

// GetSlave 获取从库链接
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 3:29 PM 2021/12/24
func (dc *DBClient) GetSlave(ctx context.Context) *gorm.DB {
	session := dc.slave.Session(&gorm.Session{})
	session.Logger = dc.getLogger(ctx, session, "slave")
	return session
}

// getLogger 获取日志实例
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 3:45 PM 2021/12/24
func (dc *DBClient) getLogger(ctx context.Context, dbClient *gorm.DB, node string) gormLogger.Interface {
	return wrapper.NewGormLoggerWithInstance(ctx, dbClient, dc.LoggerInstance, dc.DbFlag+"|"+node, dc.ExtraFieldList)
}

// GetDatabaseClient 获取数据库连接
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 18:41 2022/6/11
func (dc *DBClient) GetDatabaseClient(conf *define.Driver, logInstance *zap.Logger) (*gorm.DB, error) {
	var (
		instance *gorm.DB
		err      error
	)

	if nil == logInstance {
		logInstance = dc.LoggerInstance
	}

	if conf.DBType == consts.DatabaseDriverMysql {
		if instance, err = gorm.Open(mysql.Open(dc.buildConnectionDSN(conf)), &gorm.Config{}); nil != err {
			return nil, err
		}
	} else if conf.DBType == consts.DatabaseDriverSqlite3 {
		if instance, err = gorm.Open(sqlite.Open(dc.buildConnectionDSN(conf)), &gorm.Config{}); nil != err {
			return nil, err
		}
	} else {
		return nil, fmt.Errorf("%v : db driver is not support", conf.DBType)
	}

	instance.Logger = wrapper.NewGormLoggerWithInstance(nil, instance, logInstance, "", nil)

	return instance, nil
}

// buildConnectionDSN 构建连接信息
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 18:42 2022/6/11
func (dc *DBClient) buildConnectionDSN(conf *define.Driver) string {
	if conf.DBType == consts.DatabaseDriverSqlite3 {
		// 兼容sqlite3
		return conf.Host
	}
	return fmt.Sprintf(
		"%s:%s@tcp(%s:%d)/%s?charset=%s&parseTime=True&loc=%s",
		conf.Username,
		conf.Password,
		conf.Host,
		conf.Port,
		conf.Database,
		conf.Charset,
		conf.Timezone,
	)
}