package postgres

import (
	"context"
	"time"

	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/internal/store"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	"github.com/redis/go-redis/v9"
	"gorm.io/gorm"
)

type DeviceStore struct {
	db    *gorm.DB
	redis *redis.Client
}

func NewDeviceStore(db *gorm.DB, redis *redis.Client) *DeviceStore {
	return &DeviceStore{
		db:    db,
		redis: redis,
	}
}

func (s *DeviceStore) Create(ctx context.Context, device *model.Device) error {
	return s.db.WithContext(ctx).Create(device).Error
}

func (s *DeviceStore) CreateBatch(ctx context.Context, devices []*model.Device) error {
	if len(devices) == 0 {
		return nil
	}
	return s.db.WithContext(ctx).CreateInBatches(devices, 100).Error
}

func (s *DeviceStore) GetByID(ctx context.Context, id uint) (*model.Device, error) {
	var device model.Device
	if err := s.db.WithContext(ctx).First(&device, id).Error; err != nil {
		return nil, err
	}
	return &device, nil
}

func (s *DeviceStore) GetByDeviceNo(ctx context.Context, deviceNo string) (*model.Device, error) {
	var device model.Device
	if err := s.db.WithContext(ctx).Where("device_no = ?", deviceNo).First(&device).Error; err != nil {
		return nil, err
	}
	return &device, nil
}

func (s *DeviceStore) GetByIDs(ctx context.Context, ids []uint) ([]*model.Device, error) {
	var devices []*model.Device
	if len(ids) == 0 {
		return devices, nil
	}
	if err := s.db.WithContext(ctx).Where("id IN ?", ids).Find(&devices).Error; err != nil {
		return nil, err
	}
	return devices, nil
}

func (s *DeviceStore) Update(ctx context.Context, device *model.Device) error {
	return s.db.WithContext(ctx).Save(device).Error
}

func (s *DeviceStore) Delete(ctx context.Context, id uint) error {
	return s.db.WithContext(ctx).Delete(&model.Device{}, id).Error
}

func (s *DeviceStore) List(ctx context.Context, opts *store.QueryOptions, filters map[string]any) ([]*model.Device, int64, error) {
	var devices []*model.Device
	var total int64

	query := s.db.WithContext(ctx).Model(&model.Device{})

	if deviceNo, ok := filters["device_no"].(string); ok && deviceNo != "" {
		query = query.Where("device_no LIKE ?", "%"+deviceNo+"%")
	}
	if deviceName, ok := filters["device_name"].(string); ok && deviceName != "" {
		query = query.Where("device_name LIKE ?", "%"+deviceName+"%")
	}
	if status, ok := filters["status"].(int); ok && status > 0 {
		query = query.Where("status = ?", status)
	}
	if shopID, ok := filters["shop_id"].(*uint); ok {
		if shopID == nil {
			query = query.Where("shop_id IS NULL")
		} else {
			query = query.Where("shop_id = ?", *shopID)
		}
	}
	if batchNo, ok := filters["batch_no"].(string); ok && batchNo != "" {
		query = query.Where("batch_no = ?", batchNo)
	}
	if deviceType, ok := filters["device_type"].(string); ok && deviceType != "" {
		query = query.Where("device_type = ?", deviceType)
	}
	if manufacturer, ok := filters["manufacturer"].(string); ok && manufacturer != "" {
		query = query.Where("manufacturer LIKE ?", "%"+manufacturer+"%")
	}
	if createdAtStart, ok := filters["created_at_start"].(time.Time); ok && !createdAtStart.IsZero() {
		query = query.Where("created_at >= ?", createdAtStart)
	}
	if createdAtEnd, ok := filters["created_at_end"].(time.Time); ok && !createdAtEnd.IsZero() {
		query = query.Where("created_at <= ?", createdAtEnd)
	}
	if seriesID, ok := filters["series_id"].(uint); ok && seriesID > 0 {
		query = query.Where("series_id = ?", seriesID)
	}

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

	if opts == nil {
		opts = &store.QueryOptions{
			Page:     1,
			PageSize: constants.DefaultPageSize,
		}
	}
	offset := (opts.Page - 1) * opts.PageSize
	query = query.Offset(offset).Limit(opts.PageSize)

	if opts.OrderBy != "" {
		query = query.Order(opts.OrderBy)
	} else {
		query = query.Order("created_at DESC")
	}

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

	return devices, total, nil
}

func (s *DeviceStore) UpdateShopID(ctx context.Context, id uint, shopID *uint) error {
	return s.db.WithContext(ctx).Model(&model.Device{}).Where("id = ?", id).Update("shop_id", shopID).Error
}

func (s *DeviceStore) BatchUpdateShopIDAndStatus(ctx context.Context, ids []uint, shopID *uint, status int) error {
	if len(ids) == 0 {
		return nil
	}
	updates := map[string]any{
		"shop_id":    shopID,
		"status":     status,
		"updated_at": time.Now(),
	}
	return s.db.WithContext(ctx).Model(&model.Device{}).Where("id IN ?", ids).Updates(updates).Error
}

func (s *DeviceStore) ExistsByDeviceNoBatch(ctx context.Context, deviceNos []string) (map[string]bool, error) {
	result := make(map[string]bool)
	if len(deviceNos) == 0 {
		return result, nil
	}

	var existingDevices []struct {
		DeviceNo string
	}
	if err := s.db.WithContext(ctx).Model(&model.Device{}).
		Select("device_no").
		Where("device_no IN ?", deviceNos).
		Find(&existingDevices).Error; err != nil {
		return nil, err
	}

	for _, d := range existingDevices {
		result[d.DeviceNo] = true
	}
	return result, nil
}

func (s *DeviceStore) GetByDeviceNos(ctx context.Context, deviceNos []string) ([]*model.Device, error) {
	var devices []*model.Device
	if len(deviceNos) == 0 {
		return devices, nil
	}
	if err := s.db.WithContext(ctx).Where("device_no IN ?", deviceNos).Find(&devices).Error; err != nil {
		return nil, err
	}
	return devices, nil
}

// BatchUpdateSeriesID 批量更新设备的套餐系列ID
func (s *DeviceStore) BatchUpdateSeriesID(ctx context.Context, deviceIDs []uint, seriesID *uint) error {
	if len(deviceIDs) == 0 {
		return nil
	}
	return s.db.WithContext(ctx).Model(&model.Device{}).
		Where("id IN ?", deviceIDs).
		Update("series_id", seriesID).Error
}

// ListBySeriesID 根据套餐系列ID查询设备列表
func (s *DeviceStore) ListBySeriesID(ctx context.Context, seriesID uint) ([]*model.Device, error) {
	var devices []*model.Device
	if err := s.db.WithContext(ctx).Where("series_id = ?", seriesID).Find(&devices).Error; err != nil {
		return nil, err
	}
	return devices, nil
}
