package handler

import (
	"encoding/json"
	"fmt"
	"github.com/rabbitmq/amqp091-go"
	"math/rand"
	"samba/pkg/log"
	"samba/pkg/repo"
	"samba/pkg/rmq"
	"samba/pkg/servername"
	"samba/pkg/service"
	"samba/util/config"
	"samba/util/util"
)

type dbService struct {
	service.IService
	*repo.ClickHouseRepo
}

var gDBServices dbServices

type dbServices struct {
	services []*dbService
}

func (d *dbServices) Get(uid int64) *dbService {
	if uid < 0 {
		i := rand.Int() % len(d.services)
		return d.services[i]
	}
	return d.services[uid%int64(len(d.services))]
}

func (d *dbServices) QueueName(childId int) string {
	return fmt.Sprintf("%v-%v", servername.ClickHouse, childId)
}

func (d *dbServices) Num() int {
	return len(d.services)
}

func hallHandlerMessage(_ service.IService, d *amqp091.Delivery) {
	var msg map[string]interface{}
	if err := json.Unmarshal(d.Body, &msg); err != nil {
		log.Error(fmt.Sprintf("consume message error: %v.body:%v", err, string(d.Body)))
		return
	}
	//log.Debug(fmt.Sprintf("srv:%v recv msg:%v", s.Name(), string(d.Body)))
	if fn, ok := MsgHandler[msg["a"].(string)]; ok {
		fn(d, msg)
	} else {
		log.Error(fmt.Sprintf("msgId:%v not exist", msg["a"]))
	}
}

func InitService() {
	for j := 0; j < config.Cmd.ChildNum; j++ {
		i := j
		opts := []service.Option{
			service.SetOnInit(func(s service.IService) bool {
				if err := s.ExchangeDeclare(util.Direct(servername.ClickHouse), rmq.ExchangeDirect); err != nil {
					log.Error(err.Error())
					return false
				}
				if err := s.ExchangeDeclare(util.Topic(servername.ClickHouse), rmq.ExchangeTopic); err != nil {
					log.Error(err.Error())
					return false
				}
				if err := s.QueueDeclare(gDBServices.QueueName(i)); err != nil {
					log.Error(err.Error())
					return false
				}

				if !RegisterMsgHandler(s, i) {
					return false
				}
				if err := s.Consume(gDBServices.QueueName(i)); err != nil {
					log.Error(err.Error())
					return false
				}
				log.Info(fmt.Sprintf("service:%v init", s.Name()))
				return true
			}),
			service.SetOnNotifyStop(func(s service.IService) {

			}),
			service.SetCanStop(func(s service.IService) bool {
				return true
			}),
			service.SetOnStop(func(s service.IService) {
				if err := s.ConsumeDelete(); err != nil {
					log.Error(err.Error())
				} else {
					log.Info(fmt.Sprintf("delete consume channle"))
				}
				if err := s.QueueDelete(gDBServices.QueueName(i)); err != nil {
					log.Error(err.Error())
				} else {
					log.Info(fmt.Sprintf("delete queue:%v", gDBServices.QueueName(i)))
				}
				log.Info(fmt.Sprintf("service:%v stop", s.Name()))
			}),
		}
		s := service.NewService(servername.ClickHouse, gDBServices.QueueName(i), config.RabbitmqUrl(), hallHandlerMessage, opts...)
		dbs := &dbService{
			IService: s,
		}
		cnf := &config.Config.ClickHouse
		var err error
		dbs.ClickHouseRepo, err = repo.InitClickHouse(cnf.Host, cnf.Port, cnf.Username, cnf.Password, cnf.DbName)
		if err != nil {
			log.Error(err.Error())
		} else {
			gDBServices.services = append(gDBServices.services, dbs)
		}
	}
}

func StopService() {
	for _, s := range gDBServices.services {
		s.NotifyStop()
	}
	for _, s := range gDBServices.services {
		s.WaitStop()
	}
}

func SendMsg(exchange, router, token string, uid int64, msgId string, msg interface{}) error {
	data := service.Message{
		MsgId: msgId,
		Data:  msg,
		Token: token,
		Uid:   uid,
	}
	byteData, err := json.Marshal(data)
	if err != nil {
		return err
	}
	log.Debug(fmt.Sprintf("send msg:%v to exchange:%v, routKey:%v, data:%v", msgId, exchange, router, string(byteData)))
	if err = gDBServices.Get(uid).Publish(exchange, router, byteData); err != nil {
		log.Error(err.Error())
	}
	return err
}

func SendMsgToRPC(d *amqp091.Delivery, svr service.IService, data any, rid string, methodName ...string) {
	rsp := map[string]any{
		"a": util.Tie(len(rid) > 0, rid, "0"),
		"p": data,
	}
	buf, err := json.Marshal(rsp)
	if err == nil {
		err = svr.PublishRpc(d, buf)
	}

	if err != nil {
		log.Error(fmt.Sprintf("response RPC fail method=%s,err:%v", util.TieOrFn(len(methodName) <= 0, "unknown", func() string {
			return methodName[0]
		}), err))
	}

}