package sd

import (
	"chatplus/core/types"
	"chatplus/service/oss"
	"chatplus/store"
	"fmt"

	"github.com/go-redis/redis/v8"
	"gorm.io/gorm"
)

type ServicePool struct {
	services    []*Service
	taskQueue   *store.RedisQueue
	notifyQueue *store.RedisQueue
	Clients     *types.LMap[uint, *types.WsClient] // UserId => Client
}

func NewServicePool(db *gorm.DB, redisCli *redis.Client, manager *oss.UploaderManager, appConfig *types.AppConfig) *ServicePool {
	services := make([]*Service, 0)
	taskQueue := store.NewRedisQueue("StableDiffusion_Task_Queue", redisCli)
	notifyQueue := store.NewRedisQueue("StableDiffusion_Queue", redisCli)
	// create mj client and service
	for k, config := range appConfig.SdConfigs {
		if config.Enabled == false {
			continue
		}

		// create sd service
		name := fmt.Sprintf("StableDifffusion Service-%d", k)
		service := NewService(name, 1, 300, config, taskQueue, notifyQueue, db, manager)
		// run sd service
		go func() {
			service.Run()
		}()

		services = append(services, service)
	}

	return &ServicePool{
		taskQueue:   taskQueue,
		notifyQueue: notifyQueue,
		services:    services,
		Clients:     types.NewLMap[uint, *types.WsClient](),
	}
}

// PushTask push a new mj task in to task queue
func (p *ServicePool) PushTask(task types.SdTask) {
	logger.Debugf("add a new MidJourney task to the task list: %+v", task)
	p.taskQueue.RPush(task)
}

func (p *ServicePool) CheckTaskNotify() {
	go func() {
		for {
			var userId uint
			err := p.notifyQueue.LPop(&userId)
			if err != nil {
				continue
			}
			client := p.Clients.Get(userId)
			if client == nil {
				continue
			}
			err = client.Send([]byte("Task Updated"))
			if err != nil {
				continue
			}
		}
	}()
}

// HasAvailableService check if it has available mj service in pool
func (p *ServicePool) HasAvailableService() bool {
	return len(p.services) > 0
}