package repository

import (
	"gofaster/internal/auth/model"
	"gofaster/internal/shared/repository"

	"gorm.io/gorm"
)

type PermissionRepo struct {
	repository.BaseRepo
}

func NewPermissionRepo(db *gorm.DB) *PermissionRepo {
	return &PermissionRepo{BaseRepo: *repository.NewBaseRepo(db)}
}

func (r *PermissionRepo) FindAll(permissions *[]model.Permission) error {
	return r.DB().Find(permissions).Error
}

func (r *PermissionRepo) Create(permission *model.Permission) error {
	return r.DB().Create(permission).Error
}

func (r *PermissionRepo) GetByID(id uint) (*model.Permission, error) {
	var permission model.Permission
	err := r.DB().First(&permission, id).Error
	return &permission, err
}

func (r *PermissionRepo) GetByName(name string) (*model.Permission, error) {
	var permission model.Permission
	err := r.DB().Where("name = ?", name).First(&permission).Error
	return &permission, err
}

func (r *PermissionRepo) Update(permission *model.Permission) error {
	return r.DB().Save(permission).Error
}

func (r *PermissionRepo) Delete(id uint) error {
	return r.DB().Delete(&model.Permission{}, id).Error
}

func (r *PermissionRepo) List(page, pageSize int) ([]model.Permission, int64, error) {
	var permissions []model.Permission
	var count int64

	err := r.DB().Model(&model.Permission{}).Count(&count).Error
	if err != nil {
		return nil, 0, err
	}

	offset := (page - 1) * pageSize
	err = r.DB().Offset(offset).Limit(pageSize).Find(&permissions).Error
	return permissions, count, err
}

func (r *PermissionRepo) GetByResourceAction(resource, action string) (*model.Permission, error) {
	var permission model.Permission
	err := r.DB().Where("resource = ? AND action = ?", resource, action).First(&permission).Error
	return &permission, err
}

func (r *PermissionRepo) CheckUserPermission(userID uint, permissionName string) bool {
	var count int64

	// 查询用户是否有该权限
	r.DB().Model(&model.UserRole{}).
		Joins("JOIN role_permissions ON user_roles.role_id = role_permissions.role_id").
		Joins("JOIN permissions ON role_permissions.permission_id = permissions.id").
		Where("user_roles.user_id = ? AND permissions.name = ?", userID, permissionName).
		Count(&count)

	return count > 0
}