package job

import (
	"context"
	"encoding/json"
	"fmt"
	"github.com/go-nunu/nunu-layout-advanced/internal/service"
	"go.uber.org/zap"
)

// WhitelistJob 定义了处理白名单相关任务的接口
type WhitelistJob interface {
	// DomainConsumer 启动消费者，处理域名白名单任务
	DomainConsumer(ctx context.Context)
}

// NewWhitelistJob 创建一个新的 WhitelistJob
func NewWhitelistJob(job *Job, aoDunService service.AoDunService) WhitelistJob {
	return &whitelistJob{
		Job:          job,
		aoDunService: aoDunService,
	}
}

type whitelistJob struct {
	*Job
	aoDunService service.AoDunService
}

// DomainConsumer 是处理域名白名单任务的消费者
func (j *whitelistJob) DomainConsumer(ctx context.Context) {
	taskName := "domain_whitelist"
	taskCfg, ok := j.Rabbitmq.GetTaskConfig(taskName)
	if !ok {
		j.logger.Error(fmt.Sprintf("未找到任务 '%s' 的配置", taskName))
		return
	}

	consumerName := "domain_whitelist_consumer"
	j.logger.Info("正在启动域名白名单消费者...",
		zap.String("task", taskName),
		zap.String("queue", taskCfg.Queue),
		zap.String("consumer", consumerName),
	)

	msgs, err := j.Rabbitmq.Consume(taskCfg.Queue, consumerName, taskCfg.PrefetchCount)
	if err != nil {
		j.logger.Error("启动域名白名单消费者失败", zap.Error(err))
		return
	}

	// Define the message payload structure, now including an action field
	type domainTaskPayload struct {
		Domain string `json:"domain"`
		Action string `json:"action"` // "add" or "del"
	}

	for {
		select {
		case <-ctx.Done():
			j.logger.Info("域名白名单消费者正在关闭...", zap.String("task", taskName))
			return
		case d, ok := <-msgs:
			if !ok {
				j.logger.Warn("消息通道已关闭，域名白名单消费者退出。", zap.String("task", taskName))
				return
			}

			// 解析消息
			var payload domainTaskPayload
			if err := json.Unmarshal(d.Body, &payload); err != nil {
				j.logger.Error("解析域名白名单消息失败", zap.Error(err), zap.ByteString("body", d.Body))
				// 消息格式错误，直接拒绝且不重新入队
				_ = d.Nack(false, false)
				continue
			}

			j.logger.Info("收到域名白名单任务",
				zap.String("domain", payload.Domain),
				zap.String("routing_key", d.RoutingKey),
			)

			// Call business logic based on the action
			switch payload.Action {
			case "add":
				if err := j.aoDunService.AddDomainWhiteList(ctx, []string{payload.Domain}); err != nil {
					j.logger.Error("Failed to handle 'add' domain whitelist task", zap.Error(err), zap.String("domain", payload.Domain))
					_ = d.Reject(false) // Business failure, reject message
					continue
				}
				j.logger.Info("Successfully processed 'add' domain whitelist task", zap.String("domain", payload.Domain))
			case "del":
				if err := j.aoDunService.DeleteDomainWhiteList(ctx, []string{payload.Domain}); err != nil {
					j.logger.Error("Failed to handle 'delete' domain whitelist task", zap.Error(err), zap.String("domain", payload.Domain))
					_ = d.Reject(false) // Business failure, reject message
					continue
				}
				j.logger.Info("Successfully processed 'delete' domain whitelist task", zap.String("domain", payload.Domain))
			default:
				j.logger.Warn("Received unknown action in domain whitelist task", zap.String("action", payload.Action), zap.String("domain", payload.Domain))
				_ = d.Reject(false) // Reject message with unknown action
				continue
			}

			// 业务处理完成后，手动发送确认
			if err := d.Ack(false); err != nil {
				j.logger.Error("域名白名单任务消息确认失败", zap.Error(err))
			}
		}
	}
}