package gormx

import (
	"fmt"
	"time"

	"gorm.io/driver/mysql"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/schema"
)

func NewGorm(opts ...Option) *gorm.DB {
	defaultOpts := defaultOptions()
	for _, apply := range opts {
		apply(&defaultOpts)
	}

	if defaultOpts.Db == "" {
		panic("db is empty")
	}
	var dialector gorm.Dialector
	if defaultOpts.Db == "mysql" {
		if defaultOpts.Mysql == nil {
			panic("mysql is not supported")
		}

		dsn := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=%s&parseTime=True",
			defaultOpts.Mysql.User,
			defaultOpts.Mysql.Password,
			defaultOpts.Mysql.Host,
			defaultOpts.Mysql.Port,
			defaultOpts.Mysql.Database,
			defaultOpts.Charset,
		)
		dialector = mysql.Open(dsn)

	} else if defaultOpts.Db == "sqlite" {
		if defaultOpts.Sqlite == nil {
			panic("sqlite is not supported")
		}
		dialector = sqlite.Open(defaultOpts.Sqlite.DbPath)
	}

	db, err := gorm.Open(dialector, &gorm.Config{
		NamingStrategy: schema.NamingStrategy{
			TablePrefix:   defaultOpts.Prefix,        // 表名前缀，`Article` 的表名应该是 `it_articles`
			SingularTable: defaultOpts.SingularTable, // 使用单数表名，启用该选项，此时，`Article` 的表名应该是 `it_article`
		},
		NowFunc: func() time.Time {
			return time.Now().In(defaultOpts.Location) // 设置时区
		},
		Logger: NewGormxLogger(defaultOpts.Logger),
	})
	if err != nil {
		panic(err)
	}

	// 连接池设置
	// sqlDB, _ := db.DB()
	// sqlDB.SetMaxIdleConns(m.MaxIdleConns)
	// sqlDB.SetMaxOpenConns(m.MaxOpenConns)

	return db
}