package sdbc

import (
	"github.com/glebarez/sqlite"
	"github.com/sirupsen/logrus"
	"gitter.top/common/lormatter"
	"google.golang.org/protobuf/proto"
	"gorm.io/gorm"
	"reflect"
	"time"
)

func init() {
	var formatter = &lormatter.Formatter{
		ShowTime: true,
	}
	formatter.Register()
}

type tabler interface {
	TableName() string
}

type Config struct {
	Dbname      string        // 数据库名
	MaxIdleConn int           // 最大空闲连接
	MaxOpenConn int           // 最大连接
	MaxLifetime time.Duration // 最大生存时长
	Debug       bool          // 是否开启debug
}

type sdbc struct {
	dbname string
	client *gorm.DB
}

func NewSDBC(cfg *Config) *sdbc {
	if cfg == nil {
		logrus.Fatalf("config can not be nil")
	}
	var (
		driver = new(sdbc)
		err    error
	)
	driver.client, err = gorm.Open(sqlite.Open(cfg.Dbname), &gorm.Config{})
	if err != nil {
		logrus.Fatalf("open sqlite file failed: %v", err)
	}
	if cfg.Debug {
		driver.client = driver.client.Debug()
	}
	rawDB, err := driver.client.DB()
	if err != nil {
		logrus.Fatalf("get sqlite instance failed: %v", err)
	}
	if cfg.MaxOpenConn != 0 {
		rawDB.SetMaxOpenConns(cfg.MaxOpenConn)
	}
	if cfg.MaxIdleConn != 0 {
		rawDB.SetMaxIdleConns(cfg.MaxIdleConn)
	}
	if cfg.MaxLifetime != 0 {
		rawDB.SetConnMaxLifetime(cfg.MaxLifetime)
	}
	driver.dbname = cfg.Dbname
	return driver
}

func (s *sdbc) GetClient() *gorm.DB {
	return s.client
}

func (s *sdbc) BindModel(prototype any) Operator {
	if prototype == nil {
		logrus.Panic("model can not be nil")
	}
	if _, impled := prototype.(tabler); !impled {
		logrus.Panic("model does not implement tabler interface")
	}
	protomsg, impled := prototype.(proto.Message)
	if !impled {
		logrus.Panic("model does not implement message interface")
	}
	scope := &scope{
		&model{
			Type:      protomsg,
			modelKind: reflect.TypeOf(protomsg),
			modelName: string(protomsg.ProtoReflect().Descriptor().FullName()),
			tableName: prototype.(tabler).TableName(),
		},
		s,
	}
	if err := s.client.AutoMigrate(prototype); err != nil {
		logrus.Panicf("auto create table failed: %v", err)
	}
	return scope
}