package service

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

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

const TaskTypeContactImport = "contact:import"

type contactImportConfig struct {
	CSVBase64 string `json:"csv_base64"`
}

type contactImportJob struct {
	ImportID uint `json:"import_id"`
}

var contactImportRegistrations sync.Map

// RegisterContactImportJobs wires Chatwoot DataImportJob contacts import into
// the durable worker. Handlers are registered once per WorkerPool instance.
func RegisterContactImportJobs(wp *worker.WorkerPool, svc *ContactService) {
	if wp == nil || svc == nil {
		return
	}
	if _, loaded := contactImportRegistrations.LoadOrStore(wp, struct{}{}); loaded {
		return
	}
	wp.Register(TaskTypeContactImport, svc.performContactImportJob)
}

func (s *ContactService) performContactImportJob(ctx context.Context, job *model.BackgroundJob) error {
	var payload contactImportJob
	if err := json.Unmarshal(job.Payload, &payload); err != nil {
		return fmt.Errorf("unmarshal contact import job: %w", err)
	}
	if payload.ImportID == 0 {
		return fmt.Errorf("invalid contact import job payload: %#v", payload)
	}
	_, err := s.performContactImport(ctx, payload.ImportID)
	return err
}