package dbservice

import (
	"context"
	"go_dreamfactory/comm"
	"go_dreamfactory/lego/core"
	"go_dreamfactory/lego/sys/log"
	"go_dreamfactory/modules"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)

const (
	WriteMaxNum uint32 = 1000 //一次性最处理条数
	ErrorMaxNum uint32 = 5    // 数据库操作最大失败次数
)

var (
	ErrorLogCount = make(map[string]uint32, 0)
)

type DB_Comp struct {
	modules.Model_Comp
}

// type data struct {
// 	Table     string
// 	Wheremap  map[string]interface{} // 如果是insert 条件就是nil del 只有条件
// 	Modifymap map[string]map[string]interface{}
// }

type QueryStruct struct {
	Selector bson.M
	Query    bson.M
}

const (
	DB_ModelTable core.SqlTable = "model_log"
)

type IModel interface {
	Model_UpdateDBByLog() (err error)                         // 读取日志并更新对应的表
	Model_InsertDBByLog(data *comm.Autogenerated) (err error) // 插入日志
}

func (this *DB_Comp) Model_UpdateDBByLog(uid string) (err error) {
	_data := &mongo.Cursor{}
	if uid == "" {
		_data, err = this.DB.Find(DB_ModelTable, bson.M{}, options.Find().SetLimit(int64(WriteMaxNum)))
		if err != nil {
			return err
		}
	} else {
		_data, err = this.DB.Find(DB_ModelTable, bson.M{"uid": uid}, options.Find())
		if err != nil {
			return err
		}
	}

	_delID := make([]string, 0)      // 处理完成要删除的id
	for _data.Next(context.TODO()) { // 处理删除逻辑

		data := &comm.Autogenerated{}
		if err = _data.Decode(data); err != nil {
			log.Errorf("Decode Data err : %v", err)
			continue
		}

		if data.Act == string(comm.LogHandleType_Insert) {
			if len(data.D) < 2 { // 参数校验
				log.Errorf("parameter len _id : %s,uid : %s d.len:%v", data.ID, data.UID, len(data.D))
				continue
			}
			_obj := bson.M{}
			for _, v := range data.D[1].(bson.D) {
				_obj[v.Key] = v.Value
			}
			_key := data.D[0].(string)

			_, err := this.DB.InsertOne(core.SqlTable(_key), _obj)
			if err != nil {
				log.Errorf("insert %s db err:%v", (core.SqlTable(_key)), err)
				ErrorLogCount[data.ID]++
				if ErrorLogCount[data.ID] >= ErrorMaxNum { // 实在是写失败了那就删除吧
					log.Errorf("insert db err max num %s db err:%v", data.ID, err)
					_, err = this.DB.DeleteOne(DB_ModelTable, bson.M{"_id": data.ID})
					if err != nil {
						log.Errorf("insert %s db err:%v", data.ID, err)
					}
				}
				continue
			}
			// _, err = this.DB.DeleteOne(DB_ModelTable, bson.M{"_id": data.ID})
			// if err != nil {
			// 	log.Errorf("delete %s db err:%v", data.ID, err)
			// }
		} else if data.Act == string(comm.LogHandleType_Delete) {
			if len(data.D) < 2 { // 参数校验
				log.Errorf("parameter len _id : %s,uid : %s d.len:%v", data.ID, data.UID, len(data.D))
				continue
			}
			_key := data.D[0].(string)
			_objKey := make([]string, 0)
			for _, v := range data.D[1].(bson.D) {
				_objKey = append(_objKey, v.Value.(string))
			}
			_, err = this.DB.DeleteMany(core.SqlTable(_key), bson.M{"_id": bson.M{"$in": _objKey}}, options.Delete())
			if err != nil {
				log.Errorf("delete %s db err:%v", core.SqlTable(_key), err)
				ErrorLogCount[data.ID]++
				if ErrorLogCount[data.ID] >= ErrorMaxNum { // 实在是写失败了那就删除吧
					log.Errorf("del db err max num %s db err:%v", data.ID, err)
					_, err = this.DB.DeleteOne(DB_ModelTable, bson.M{"_id": data.ID})
					if err != nil {
						log.Errorf("insert %s db err:%v", data.ID, err)
					}
				}
				continue
			}
		} else { // update
			if len(data.D) < 3 { // 参数校验
				log.Errorf("parameter len _id : %s,uid : %s d.len:%v", data.ID, data.UID, len(data.D))
				continue
			}
			_key := data.D[0].(string)
			where := data.D[1].(bson.D)
			_obj := &QueryStruct{}
			for _, v := range where {
				_obj.Selector[v.Key] = v
			}
			query := data.D[2].(bson.D)
			for _, v := range query {
				_obj.Query[v.Key] = v
			}
			_, err := this.DB.UpdateMany(core.SqlTable(_key), _obj.Selector, _obj.Query)
			if err != nil {
				log.Errorf("Update %s db err:%v", core.SqlTable(_key), err)
				ErrorLogCount[data.ID]++
				if ErrorLogCount[data.ID] >= ErrorMaxNum { // 超过一定次数写失败了那就删除吧
					log.Errorf("update db err max num %s db err:%v", data.ID, err)
					_, err = this.DB.DeleteOne(DB_ModelTable, bson.M{"_id": data.ID})
					if err != nil {
						log.Errorf("insert %s db err:%v", data.ID, err)
					}
				}
				continue
			}
		}
		_delID = append(_delID, data.ID) // 都操作都成功了记录要删除的key
	}
	// 批量删除已处理的数据
	_, err = this.DB.DeleteMany(DB_ModelTable, bson.M{"_id": bson.M{"$in": _delID}}, options.Delete())
	if err != nil {
		log.Errorf("del err %v", err)
	}
	return
}

func (this *DB_Comp) Model_InsertDBByLog(data *comm.Autogenerated) (err error) {

	_, err = this.DB.InsertOne(DB_ModelTable, data)
	if err != nil {
		log.Errorf("insert model db err %v", err)
	}
	return err
}