package service

import (
	"context"
	"encoding/json"
	"fmt"
	"sync"

	"github.com/gochat/gochat/internal/model"
	"github.com/gochat/gochat/internal/worker"
)

const TaskTypeCaptainDocumentSync = "captain:document_sync"

type captainDocumentSyncJob struct {
	AccountID  uint `json:"account_id"`
	DocumentID uint `json:"document_id"`
}

var captainDocumentRegistrations sync.Map

// RegisterCaptainDocumentJobs wires Captain::Documents::PerformSyncJob into
// the durable worker. The sync backend remains fakeable for tests and disabled
// deployments.
func RegisterCaptainDocumentJobs(wp *worker.WorkerPool, svc *CaptainDocumentService) {
	if wp == nil || svc == nil {
		return
	}
	if _, loaded := captainDocumentRegistrations.LoadOrStore(wp, struct{}{}); loaded {
		return
	}
	wp.Register(TaskTypeCaptainDocumentSync, svc.performDocumentSyncJob)
}

func (s *CaptainDocumentService) performDocumentSyncJob(ctx context.Context, job *model.BackgroundJob) error {
	var payload captainDocumentSyncJob
	if err := json.Unmarshal(job.Payload, &payload); err != nil {
		return fmt.Errorf("unmarshal captain document sync job: %w", err)
	}
	if payload.AccountID == 0 || payload.DocumentID == 0 {
		return fmt.Errorf("invalid captain document sync job payload: %#v", payload)
	}
	_, err := s.SyncDocumentByAccount(ctx, payload.AccountID, payload.DocumentID)
	return err
}