package model

import (
	"strings"

	"gorm.io/gorm"
)

type KillaraCustomerModel struct {
	// fields ...
	db        *gorm.DB
	TableName string // 表名
}

func (m *KillaraCustomerModel) InsertCustomer(customer *KillaraCustomer) (uint64, error) {

	if err := m.db.Model(&KillaraCustomer{}).Create(customer).Error; err != nil {
		return 0, err
	}

	return *customer.CustomerId, nil
}

func (m *KillaraCustomerModel) UpdateCustomer(customer *KillaraCustomer) error {
	return m.db.Model(&KillaraCustomer{}).Where("customer_id = ?", customer.CustomerId).Updates(customer).Error
}

func (m *KillaraCustomerModel) DeleteCustomer(customer *KillaraCustomer) error {
	return m.db.Where("customer_id = ?", customer.CustomerId).Delete(&KillaraCustomer{}).Error
}

func (m *KillaraCustomerModel) GetCustomer(customerID uint64) (*KillaraCustomer, error) {
	var customer KillaraCustomer
	err := m.db.Where("customer_id = ? AND status = 1", customerID).First(&customer).Error
	return &customer, err
}

func (m *KillaraCustomerModel) CheckTelephoneExists(telephone string) (bool, error) {
	// var count int64
	// err := m.db.Model(&KillaraCustomer{}).Where("telephone = ?", telephone).Count(&count).Error
	err := m.db.Model(&KillaraCustomer{}).Where("telephone = ?", telephone).First(nil).Error
	if err == gorm.ErrRecordNotFound {
		return false, nil
	}
	return err != nil, err
}

func (m *KillaraCustomerModel) CheckEmailExists(email string) (bool, error) {
	// var count int64
	err := m.db.Model(&KillaraCustomer{}).Where("email = ?", email).First(nil).Error
	if err == gorm.ErrRecordNotFound {
		return false, nil
	}
	return err != nil, err
}

func (m *KillaraCustomerModel) GetCustomerByCode(code string) (*KillaraCustomer, error) {
	var customer KillaraCustomer
	err := m.db.Where("code = ? AND status = 1", code).First(&customer).Error
	if err == gorm.ErrRecordNotFound {
		return nil, nil
	}
	return &customer, err
}

func (m *KillaraCustomerModel) GetCustomerByTelephone(telephone string) (*KillaraCustomer, error) {
	var customer KillaraCustomer
	err := m.db.Where("telephone = ? AND status = 1", telephone).Order("customer_id").First(&customer).Error
	if err == gorm.ErrRecordNotFound {
		return nil, nil
	}
	return &customer, err
}

func (m *KillaraCustomerModel) GetCustomerByTelephoneForBackEnd(telephone string) (*KillaraCustomer, error) {
	var customer KillaraCustomer
	err := m.db.Where("telephone = ?", telephone).First(&customer).Error
	if err == gorm.ErrRecordNotFound {
		return nil, nil
	}
	return &customer, err
}

func (m *KillaraCustomerModel) GetCustomerByEmailForBackEnd(email string) (*KillaraCustomer, error) {
	var customer KillaraCustomer
	err := m.db.Where("email = ?", email).First(&customer).Error
	if err == gorm.ErrRecordNotFound {
		return nil, nil
	}
	return &customer, err
}

func (m *KillaraCustomerModel) GetCustomerForBackEnd(customerID uint64) (*KillaraCustomer, error) {
	var customer KillaraCustomer
	err := m.db.Where("customer_id = ?", customerID).First(&customer).Error
	if err == gorm.ErrRecordNotFound {
		return nil, nil
	}
	return &customer, err
}

// 可以用于代替下面的data结构
type Filter struct {
	Type      *int64  `json:"filter_type" form:"filter_type"`
	Email     *string `json:"filter_email" form:"filter_email"`
	Telephone *string `json:"filter_telephone" form:"filter_telephone"`
	Nickname  *string `json:"filter_nickname" form:"filter_nickname"`
	Name      *string `json:"filter_name" form:"filter_name"`
	Code      *string `json:"filter_code" form:"filter_code"`
	Realname  *string `json:"filter_realname" form:"filter_realname"`
	Parents   *[]int  `json:"filter_parents" form:"filter_parents"`
	Status    *int64  `json:"filter_status" form:"filter_status"`
	DisableA  *bool   `json:"filter_disable_a" form:"filter_disable_a"`
	Sort      *string `json:"sort" form:"sort"`
	Order     *string `json:"order" form:"order"`
	Start     *int64  `json:"start" form:"start"`
	Limit     *int64  `json:"limit" form:"limit"`
}

func (m *KillaraCustomerModel) GetCustomersForBackEndForAutocomplete(data map[string]interface{}) ([]*KillaraCustomer, error) {
	var customers []*KillaraCustomer
	query := m.db.Model(&KillaraCustomer{})

	// 过滤客户 ID
	if filterParents, ok := data["filter_parents"]; ok {
		if parentIDs, ok := filterParents.([]uint64); ok && len(parentIDs) > 0 {
			query = query.Where("customer_id IN (?)", parentIDs)
		}
	}

	// 构建模糊搜索条件
	conditions := make([]interface{}, 0)

	if filterTelephone, ok := data["filter_telephone"].(string); ok && filterTelephone != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, telephone) > 0", filterTelephone))
	}

	if filterEmail, ok := data["filter_email"].(string); ok && filterEmail != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, email) > 0", filterEmail))
	}

	if filterNickname, ok := data["filter_nickname"].(string); ok && filterNickname != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, nickname) > 0", filterNickname))
	}

	if len(conditions) > 0 {
		query = query.Where(strings.Join(make([]string, len(conditions)), " OR "), conditions...)
	}

	// 排序和分页
	query = query.Order("customer_id DESC")

	if start, ok := data["start"].(int); ok && start > 0 {
		query = query.Offset(start)
	}

	if limit, ok := data["limit"].(int); ok && limit > 0 {
		query = query.Limit(limit)
	} else {
		query = query.Limit(10)
	}

	err := query.Find(&customers).Error
	if err == gorm.ErrRecordNotFound {
		return nil, nil
	}
	return customers, err
}

func (m *KillaraCustomerModel) GetCustomersForBackEnd(data map[string]interface{}) ([]*KillaraCustomer, error) {
	var customers []*KillaraCustomer
	query := m.db.Model(&KillaraCustomer{})

	conditions := make([]interface{}, 0)

	if filterType, ok := data["filter_type"]; ok {
		conditions = append(conditions, m.db.Where("`type` = ?", filterType))
	}

	if filterRealname, ok := data["filter_realname"].(string); ok && filterRealname != "" {
		conditions = append(conditions, m.db.Where("`realname` = ?", filterRealname))
	}

	if filterCode, ok := data["filter_code"].(string); ok && filterCode != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, code) > 0", filterCode))
	}

	if filterTelephone, ok := data["filter_telephone"].(string); ok && filterTelephone != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, telephone) > 0", filterTelephone))
	}

	if filterEmail, ok := data["filter_email"].(string); ok && filterEmail != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, email) > 0", filterEmail))
	}

	if filterNickname, ok := data["filter_nickname"].(string); ok && filterNickname != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, nickname) > 0", filterNickname))
	}

	if filterName, ok := data["filter_name"].(string); ok && filterName != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, name) > 0", filterName))
	}

	if filterStatus, ok := data["filter_status"]; ok {
		conditions = append(conditions, m.db.Where("`status` = ?", filterStatus))
	}

	if filterDisableA, ok := data["filter_disable_a"]; ok {
		conditions = append(conditions, m.db.Where("`disable_a` = ?", filterDisableA))
	}

	if filterParentID, ok := data["filter_parent_id"]; ok {
		conditions = append(conditions, m.db.Where("`parent_id` = ?", filterParentID))
	}

	if filterParents, ok := data["filter_parents"]; ok {
		if parentIDs, ok := filterParents.([]uint64); ok && len(parentIDs) > 0 {
			conditions = append(conditions, m.db.Where("`parent_id` IN (?)", parentIDs))
		}
	}

	if filterInsertDate, ok := data["filter_insert_date"].(string); ok && filterInsertDate != "" {
		conditions = append(conditions, m.db.Where("DATE(`insert_date`) = ?", filterInsertDate))
	}

	if len(conditions) > 0 {
		query = query.Where(strings.Join(make([]string, len(conditions)), " AND "), conditions...)
	}

	if sort, ok := data["sort"].(string); ok && sort != "" {
		order := "DESC"
		if sortOrder, ok := data["order"].(string); ok {
			order = sortOrder
		}
		query = query.Order(sort + " " + order)
	}

	if start, ok := data["start"].(int); ok && start > 0 {
		query = query.Offset(start)
	}

	if limit, ok := data["limit"].(int); ok && limit > 0 {
		query = query.Limit(limit)
	} else {
		query = query.Limit(10)
	}

	err := query.Find(&customers).Error
	if err == gorm.ErrRecordNotFound {
		return nil, nil
	}
	return customers, err
}

func (m *KillaraCustomerModel) GetTotalCustomersForBackEnd(data map[string]interface{}) (int64, error) {
	var count int64
	query := m.db.Model(&KillaraCustomer{})

	var conditions []interface{}

	if filterType, ok := data["filter_type"]; ok {
		conditions = append(conditions, m.db.Where("`type` = ?", filterType))
	}

	if filterRealname, ok := data["filter_realname"].(string); ok && filterRealname != "" {
		conditions = append(conditions, m.db.Where("`realname` = ?", filterRealname))
	}

	if filterCode, ok := data["filter_code"].(string); ok && filterCode != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, code) > 0", filterCode))
	}

	if filterTelephone, ok := data["filter_telephone"].(string); ok && filterTelephone != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, telephone) > 0", filterTelephone))
	}

	if filterEmail, ok := data["filter_email"].(string); ok && filterEmail != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, email) > 0", filterEmail))
	}

	if filterNickname, ok := data["filter_nickname"].(string); ok && filterNickname != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, nickname) > 0", filterNickname))
	}

	if filterName, ok := data["filter_name"].(string); ok && filterName != "" {
		conditions = append(conditions, m.db.Where("LOCATE(?, name) > 0", filterName))
	}

	if filterStatus, ok := data["filter_status"]; ok {
		conditions = append(conditions, m.db.Where("`status` = ?", filterStatus))
	}

	if filterDisableA, ok := data["filter_disable_a"]; ok {
		conditions = append(conditions, m.db.Where("`disable_a` = ?", filterDisableA))
	}

	if filterParentID, ok := data["filter_parent_id"]; ok {
		conditions = append(conditions, m.db.Where("`parent_id` = ?", filterParentID))
	}

	if filterParents, ok := data["filter_parents"]; ok {
		if parentIDs, ok := filterParents.([]uint64); ok && len(parentIDs) > 0 {
			conditions = append(conditions, m.db.Where("`parent_id` IN (?)", parentIDs))
		}
	}

	if filterInsertDate, ok := data["filter_insert_date"].(string); ok && filterInsertDate != "" {
		conditions = append(conditions, m.db.Where("DATE(`insert_date`) = ?", filterInsertDate))
	}

	if len(conditions) > 0 {
		query = query.Where(strings.Join(make([]string, len(conditions)), " AND "), conditions...)
	}

	err := query.Count(&count).Error
	if err == gorm.ErrRecordNotFound {
		return 0, nil
	}
	return count, err
}

// 获取客户的所有上级
func (m *KillaraCustomerModel) GetFullParents(parentID uint64) ([]*KillaraCustomer, error) {
	var parents []*KillaraCustomer

	// 获取当前父级客户
	parent, err := m.GetCustomer(parentID)
	if err != nil {
		return nil, err
	}
	if parent != nil {
		parents = append(parents, parent)

		// 如果还有上级,则递归获取
		if parent.ParentId != nil {
			upperParents, err := m.GetFullParents(uint64(*parent.ParentId))
			if err != nil {
				return nil, err
			}
			parents = append(parents, upperParents...)
		}
	}

	return parents, nil
}

// 获取客户自身及所有上级
func (m *KillaraCustomerModel) GetFullParentsFromSelf(customerID uint64) ([]*KillaraCustomer, error) {
	customer, err := m.GetCustomer(customerID)
	if err != nil {
		return nil, err
	}

	var parents []*KillaraCustomer
	if customer != nil && customer.ParentId != nil {
		parents, err = m.GetFullParents(uint64(*customer.ParentId))
		if err != nil {
			return nil, err
		}
	}

	parents = append([]*KillaraCustomer{customer}, parents...)
	return parents, nil
}

// 获取客户的所有下级
func (m *KillaraCustomerModel) GetFullChildren(parentID uint64) ([]*KillaraCustomer, error) {
	var children []*KillaraCustomer

	// 获取直接下级
	directChildren, err := m.GetCustomersForBackEnd(map[string]interface{}{
		"filter_parent_id": parentID,
	})
	if err != nil {
		return nil, err
	}

	children = append(children, directChildren...)

	// 递归获取下级的下级
	for _, child := range directChildren {
		grandChildren, err := m.GetFullChildren(*child.CustomerId)
		if err != nil {
			return nil, err
		}
		children = append(children, grandChildren...)
	}

	return children, nil
}

// 获取客户自身及所有下级
func (m *KillaraCustomerModel) GetFullChildrenWithSelf(customerID uint64) ([]*KillaraCustomer, error) {
	customer, err := m.GetCustomer(customerID)
	if err != nil {
		return nil, err
	}

	var children []*KillaraCustomer
	if customer != nil {
		children = append(children, customer)
		childrenOfCustomer, err := m.GetFullChildren(*customer.CustomerId)
		if err != nil {
			return nil, err
		}
		children = append(children, childrenOfCustomer...)
	}

	return children, nil
}