package graph

import (
	"context"
	"errors"
	"fmt"
	"tailly_back_v2/internal/domain"
	"tailly_back_v2/internal/repository"
	"time"
)

type deviceResolver struct{ *Resolver }

// Device returns DeviceResolver implementation.
func (r *Resolver) Device() DeviceResolver { return &deviceResolver{r} }

// LastActiveAt is the resolver for the lastActiveAt field.
func (r *deviceResolver) LastActiveAt(ctx context.Context, obj *domain.Device) (string, error) {
	if obj == nil {
		return "", fmt.Errorf("device is nil")
	}
	// Используем ExpiresAt как время последней активности
	return obj.ExpiresAt.Format(time.RFC3339), nil
}

// RenameDevice is the resolver for the renameDevice field.
func (r *mutationResolver) RenameDevice(ctx context.Context, deviceID int, name string) (*domain.Device, error) {
	userID, err := getUserIDFromContext(ctx)
	if err != nil {
		return nil, err
	}

	// Получаем устройство через репозиторий
	device, err := r.DeviceRepo.GetByID(ctx, deviceID)
	if err != nil {
		if errors.Is(err, repository.ErrDeviceNotFound) {
			return nil, fmt.Errorf("device not found")
		}
		return nil, fmt.Errorf("failed to get device: %v", err)
	}

	// Проверяем владельца устройства
	if device.UserID != userID {
		return nil, fmt.Errorf("unauthorized to rename this device")
	}

	// Обновляем имя
	device.Name = name
	if err := r.DeviceRepo.Update(ctx, device); err != nil {
		return nil, fmt.Errorf("failed to update device: %v", err)
	}

	return device, nil
}

// Devices is the resolver for the devices field.
func (r *queryResolver) Devices(ctx context.Context) ([]*domain.Device, error) {
	userID, err := getUserIDFromContext(ctx)
	if err != nil {
		return nil, err
	}

	devices, err := r.DeviceRepo.GetByUser(ctx, userID)
	if err != nil {
		return nil, fmt.Errorf("failed to get user devices: %v", err)
	}

	return devices, nil
}