package usecase

import (
	"context"
	"fmt"

	appnotifDomain "apps/backend/internal/module/appnotif/domain"

	"github.com/google/uuid"
)

// AppNotifWriter is satisfied by appnotif usecase for system notifications.
type AppNotifWriter interface {
	// InsertSystem creates a one-shot system notification.
	InsertSystem(ctx context.Context, ownerUID int64, title, body, refType, refID string) error
}

// AppNotifBridge adapts appnotif.Service-like insert.
type AppNotifBridge struct {
	Insert func(ctx context.Context, n *appnotifDomain.Notification) error
}

func (b *AppNotifBridge) InsertSystem(ctx context.Context, ownerUID int64, title, body, refType, refID string) error {
	if b == nil || b.Insert == nil {
		return nil
	}
	return b.Insert(ctx, &appnotifDomain.Notification{
		ID:        uuid.NewString(),
		OwnerUID:  ownerUID,
		Title:     title,
		Body:      body,
		Kind:      appnotifDomain.KindSystem,
		RefType:   refType,
		RefID:     refID,
		CreatedAt: appnotifDomain.NowNano(),
	})
}

// NotifierFromAppNotif builds SweepNotifier from appnotif bridge.
func NotifierFromAppNotif(w AppNotifWriter) SweepNotifier {
	return sweepNotifyFunc(func(ctx context.Context, ownerUID int64, sweepID, watchID, reason string) error {
		if w == nil {
			return nil
		}
		title := "雷達巡檢失敗"
		body := reason
		if body == "" {
			body = "今天的雷達巡檢沒有完成，請稍後重試或檢查抓取設定。"
		}
		return w.InsertSystem(ctx, ownerUID, title, body, "sweep", sweepID)
	})
}

type sweepNotifyFunc func(ctx context.Context, ownerUID int64, sweepID, watchID, reason string) error

func (f sweepNotifyFunc) NotifySweepFailed(ctx context.Context, ownerUID int64, sweepID, watchID, reason string) error {
	return f(ctx, ownerUID, sweepID, watchID, reason)
}

// Ensure compile-time string for watchID usage in future deep-links.
var _ = fmt.Sprintf