package service

import (
	e "errors"
	"gold-shop/errors"
	"gold-shop/global"
	"gold-shop/model"
	"gold-shop/utils"
	"gorm.io/gorm"
)

var AdminService = adminService{}

type adminService struct {
}

func (adminService) Login(username string, password string) (string, error) {
	admin := &model.Admin{}
	err := global.DB.Where("username", username).First(admin).Error
	if e.Is(err, gorm.ErrRecordNotFound) {
		return "", errors.NewBusinessError("账号或密码错误")
	}
	if utils.PasswordVerify(password, admin.PasswordHash) {
		return utils.GenerateToken(admin.ID, "admin")
	}
	return "", errors.NewBusinessError("账号或密码错误")
}

func (adminService) Add(username string, password string) error {
	admin := &model.Admin{}
	err := global.DB.Where("username", username).First(admin).Error
	if err == nil {
		return errors.NewBusinessError("账号已存在")
	}
	admin.Username = username
	passwordHash, _ := utils.PasswordHash(password)
	admin.PasswordHash = passwordHash
	return global.DB.Save(admin).Error
}

func (adminService) ModifyPassword(password string, oldPassword string, admin *model.Admin) error {
	if !utils.PasswordVerify(oldPassword, admin.PasswordHash) {
		return errors.NewBusinessError("旧密码错误")
	}
	passwordHash, _ := utils.PasswordHash(password)
	admin.PasswordHash = passwordHash
	return global.DB.Save(admin).Error
}

func (adminService) ResetPassword(adminID int, password string) error {
	admin := &model.Admin{}
	err := global.DB.Where("id", adminID).First(admin).Error
	if e.Is(err, gorm.ErrRecordNotFound) {
		return errors.NewBusinessError("账号不存在")
	}
	passwordHash, _ := utils.PasswordHash(password)
	admin.PasswordHash = passwordHash
	return global.DB.Save(admin).Error
}

func (adminService) GetAdminInfo(adminID int) *model.Admin {
	admin := &model.Admin{}
	global.DB.Where("id", adminID).First(admin)
	return admin
}