package setting

import (
	"errors"
	"net/http"
	"toutoukan/init/databaseInit"

	"github.com/gin-gonic/gin"
)

type UserSettingUpdateReq struct {
	UID           string `json:"uid" binding:"required"` // 用户ID，必填
	Password      string `json:"password"`               // 密码，可选
	AvatarURL     string `json:"avatar_url"`             // 头像URL，可选
	Gender        int    `json:"gender"`                 // 性别，可选
	BirthdateDate string `json:"birthdate_date"`         // 生日，可选
	Bio           string `json:"bio"`                    // 个人简介，可选
	Username      string `json:"username"`               // 用户名，可选
}

// 自定义验证函数，确保除uid外至少有一个字段有值
func (u *UserSettingUpdateReq) Validate() error {
	if u.Password == "" && u.AvatarURL == "" && u.Gender == 0 && u.BirthdateDate == "" && u.Bio == "" && u.Username == "" {
		return ErrAtLeastOneFieldRequired
	}
	return nil
}

// 定义错误变量
var ErrAtLeastOneFieldRequired = errors.New("at least one field (password, avatar_url, gender, birthdate_date, bio, username) is required")

type User struct {
	UID           string `gorm:"column:uid;type:varchar(40);primaryKey"`
	Telephone     string `gorm:"column:telephone;type:varchar(255)"`
	Password      string `gorm:"column:password;type:varchar(30)"`
	AvatarURL     string `gorm:"column:avatar_url;type:varchar(255);default:'https://默认头像地址'"`
	Gender        int    `gorm:"column:gender;type:int"`
	BirthdateDate string `gorm:"column:birthdate_date;type:datetime"`
	CreateTime    string `gorm:"column:createtime;type:datetime"`
	UpdateTime    string `gorm:"column:updatetime;type:datetime"`
	Bio           string `gorm:"column:bio;type:varchar(255)"`
	Username      string `gorm:"column:username;type:varchar(30)"`
	TotalPoints   int    `gorm:"column:total_points;type:int;default:0"`
}

// TableName 指定表名
func (User) TableName() string {
	return "user_info"
}

// ChangeUserSetting
func ChangeUserSetting(c *gin.Context) {
	// 1. 绑定请求体到结构体
	var req UserSettingUpdateReq
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 2. 自定义验证：确保至少有一个字段有值
	if err := req.Validate(); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 3. 准备要更新的数据
	var updateData User
	if req.Password != "" {
		updateData.Password = req.Password
	}
	if req.AvatarURL != "" {
		updateData.AvatarURL = req.AvatarURL
	}
	if req.Gender != 0 {
		updateData.Gender = req.Gender
	}
	if req.BirthdateDate != "" {
		updateData.BirthdateDate = req.BirthdateDate
	}
	if req.Bio != "" {
		updateData.Bio = req.Bio
	}
	if req.Username != "" {
		updateData.Username = req.Username
	}

	// 4. 执行数据库更新
	result := databaseInit.UserDB.Model(&User{}).Where("uid = ?", req.UID).Updates(updateData)
	if result.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
		return
	}
	if result.RowsAffected == 0 {
		c.JSON(http.StatusNotFound, gin.H{"error": "user not found"})
		return
	}

	// 5. 返回成功响应
	c.JSON(http.StatusOK, gin.H{"message": "user setting updated successfully", "success": true})
}