package analytics

import (
	"context"
	"encoding/json"
	"fmt"
	"tercul/internal/app/analytics"

	"github.com/hibiken/asynq"
)

type Worker struct {
	analyticsService analytics.Service
}

func NewWorker(analyticsService analytics.Service) *Worker {
	return &Worker{analyticsService: analyticsService}
}

func (w *Worker) ProcessTask(ctx context.Context, t *asynq.Task) error {
	var event analytics.AnalyticsEvent
	if err := json.Unmarshal(t.Payload(), &event); err != nil {
		return fmt.Errorf("failed to unmarshal analytics event: %w", err)
	}

	switch event.EventType {
	case analytics.EventTypeWorkViewed:
		if event.WorkID != nil {
			return w.analyticsService.IncrementWorkViews(ctx, *event.WorkID)
		}
	case analytics.EventTypeWorkLiked:
		if event.WorkID != nil {
			return w.analyticsService.IncrementWorkLikes(ctx, *event.WorkID)
		}
	case analytics.EventTypeWorkCommented:
		if event.WorkID != nil {
			return w.analyticsService.IncrementWorkComments(ctx, *event.WorkID)
		}
	case analytics.EventTypeWorkBookmarked:
		if event.WorkID != nil {
			return w.analyticsService.IncrementWorkBookmarks(ctx, *event.WorkID)
		}
	case analytics.EventTypeTranslationViewed:
		if event.TranslationID != nil {
			return w.analyticsService.IncrementTranslationViews(ctx, *event.TranslationID)
		}
	case analytics.EventTypeTranslationLiked:
		if event.TranslationID != nil {
			return w.analyticsService.IncrementTranslationLikes(ctx, *event.TranslationID)
		}
	case analytics.EventTypeTranslationCommented:
		if event.TranslationID != nil {
			return w.analyticsService.IncrementTranslationComments(ctx, *event.TranslationID)
		}
	default:
		return fmt.Errorf("unknown analytics event type: %s", event.EventType)
	}

	return nil
}