package repository

import (
	"context"
	"strings"

	"apskel-pos-be/internal/entities"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

type UserDeviceRepositoryImpl struct {
	db *gorm.DB
}

func NewUserDeviceRepositoryImpl(db *gorm.DB) *UserDeviceRepositoryImpl {
	return &UserDeviceRepositoryImpl{
		db: db,
	}
}

func (r *UserDeviceRepositoryImpl) Create(ctx context.Context, device *entities.UserDevice) error {
	return r.db.WithContext(ctx).Create(device).Error
}

func (r *UserDeviceRepositoryImpl) GetByID(ctx context.Context, id uuid.UUID) (*entities.UserDevice, error) {
	var device entities.UserDevice
	err := r.db.WithContext(ctx).First(&device, "id = ?", id).Error
	if err != nil {
		return nil, err
	}
	return &device, nil
}

func (r *UserDeviceRepositoryImpl) GetByDeviceID(ctx context.Context, deviceID string, userID uuid.UUID) (*entities.UserDevice, error) {
	var device entities.UserDevice
	err := r.db.WithContext(ctx).Where("device_id = ? AND user_id = ?", deviceID, userID).First(&device).Error
	if err != nil {
		return nil, err
	}
	return &device, nil
}

func (r *UserDeviceRepositoryImpl) GetByUserID(ctx context.Context, userID uuid.UUID) ([]*entities.UserDevice, error) {
	var devices []*entities.UserDevice
	err := r.db.WithContext(ctx).Where("user_id = ?", userID).Order("created_at DESC").Find(&devices).Error
	return devices, err
}

func (r *UserDeviceRepositoryImpl) Update(ctx context.Context, device *entities.UserDevice) error {
	return r.db.WithContext(ctx).Save(device).Error
}

func (r *UserDeviceRepositoryImpl) Delete(ctx context.Context, id uuid.UUID) error {
	return r.db.WithContext(ctx).Delete(&entities.UserDevice{}, "id = ?", id).Error
}

func (r *UserDeviceRepositoryImpl) DeleteByUserID(ctx context.Context, userID uuid.UUID) error {
	return r.db.WithContext(ctx).Delete(&entities.UserDevice{}, "user_id = ?", userID).Error
}

func (r *UserDeviceRepositoryImpl) List(ctx context.Context, filters map[string]interface{}, limit, offset int) ([]*entities.UserDevice, int64, error) {
	var devices []*entities.UserDevice
	var total int64

	query := r.db.WithContext(ctx).Model(&entities.UserDevice{})

	for key, value := range filters {
		switch key {
		case "user_id":
			query = query.Where("user_id = ?", value)
		case "platform":
			if platform, ok := value.(string); ok && platform != "" {
				query = query.Where("platform = ?", platform)
			}
		case "search":
			if searchStr, ok := value.(string); ok && searchStr != "" {
				searchPattern := "%" + strings.ToLower(searchStr) + "%"
				query = query.Where("LOWER(device_name) LIKE ? OR LOWER(device_id) LIKE ?",
					searchPattern, searchPattern)
			}
		default:
			query = query.Where(key+" = ?", value)
		}
	}

	if err := query.Count(&total).Error; err != nil {
		return nil, 0, err
	}

	err := query.Order("created_at DESC").Limit(limit).Offset(offset).Find(&devices).Error
	return devices, total, err
}