// Package mapper 数据访问层
package mapper

import (
	"server/config"
	"server/modules/user/entity"

	"gorm.io/gorm"
)

type PlatformUserMapper struct {
	db *gorm.DB
}

func NewPlatformUserMapper() *PlatformUserMapper {
	return &PlatformUserMapper{db: config.DB}
}

func (m *PlatformUserMapper) baseDB() *gorm.DB {
	return m.db
}

// GetDB 获取数据库实例，默认过滤软删除
func (m *PlatformUserMapper) GetDB() *gorm.DB {
	return m.baseDB().Where("deleted = 0")
}

// FindAll 分页查询
func (m *PlatformUserMapper) FindAll(page, size int) ([]entity.PlatformUser, int64, error) {
	var items []entity.PlatformUser
	var total int64
	query := m.GetDB().Model(&entity.PlatformUser{})
	query.Count(&total)
	err := query.Offset((page - 1) * size).Limit(size).Find(&items).Error
	return items, total, err
}

// FindByID 根据 ID 查询
func (m *PlatformUserMapper) FindByID(id int64) (*entity.PlatformUser, error) {
	var item entity.PlatformUser
	err := m.GetDB().First(&item, "id = ?", id).Error
	return &item, err
}

// FindByPlatformOpenID 根据平台类型与 openid 查询
func (m *PlatformUserMapper) FindByPlatformOpenID(platformType int8, openid string) (*entity.PlatformUser, error) {
	var item entity.PlatformUser
	err := m.GetDB().First(&item, "platform_type = ? AND platform_openid = ?", platformType, openid).Error
	return &item, err
}

// FindByUserIDAndPlatformType 根据用户ID与平台类型查询
func (m *PlatformUserMapper) FindByUserIDAndPlatformType(userID int64, platformType int8) (*entity.PlatformUser, error) {
	var item entity.PlatformUser
	err := m.GetDB().First(&item, "user_id = ? AND platform_type = ?", userID, platformType).Error
	return &item, err
}

// Create 创建记录
func (m *PlatformUserMapper) Create(item *entity.PlatformUser) error {
	return m.baseDB().Create(item).Error
}

// Update 更新记录
func (m *PlatformUserMapper) Update(item *entity.PlatformUser) error {
	return m.baseDB().Save(item).Error
}

// UpdateFields 更新指定字段
func (m *PlatformUserMapper) UpdateFields(id int64, fields map[string]interface{}) error {
	return m.baseDB().Model(&entity.PlatformUser{}).Where("id = ?", id).Updates(fields).Error
}

// Delete 逻辑删除
func (m *PlatformUserMapper) Delete(id int64) error {
	return m.baseDB().Model(&entity.PlatformUser{}).Where("id = ?", id).Update("deleted", 1).Error
}