package worker

import (
	"context"
	"errors"
	"fmt"
	"goRedisDLM/engine"
	"goRedisDLM/redisLock"
	"log"
	"math/rand"
	"strconv"
	"time"

	"github.com/go-redis/redis/v8"
	"github.com/google/uuid"
)

type Inventory struct {
	Client *redis.Client
}

func (i *Inventory) Work(request engine.Request, response *engine.Response) error {
	value := uuid.New()

	log.Printf("uuid: %s, lock key: %s\n", value.String(), request.Dlock)

	lock := redisLock.CreateRedisLock(i.Client, context.Background(), request.Dlock, value.String(), 300)
	lock.Lock()

	time.Sleep(time.Duration(rand.Int31n(100)) * time.Millisecond)

	get := i.Client.Get(context.Background(), "inventory")
	log.Printf("%s\n", get)

	inventory, err := strconv.Atoi(get.Val())
	if err != nil {
		goto Error
	}
	inventory = inventory - 1
	if inventory >= 0 {
		i.Client.Set(context.Background(), "inventory", fmt.Sprintf("%d", inventory), redis.KeepTTL)
	} else {
		log.Printf("error DLock error :%d\n", inventory)
		err = errors.New("inventory err")
		goto Error
	}
	lock.Unlock()

	response.Id = request.Id

	return nil

Error:
	lock.Unlock()
	return err
}