package controller

import (
	"errors"
	"net/http"
	"woord-core-service/model"

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

type RegisterRequest struct {
	Name     string `form:"name" binding:"required"`
	Password string `form:"password" binding:"required"`
}

type RegisterResponse struct {
	UserID uint `json:"id"`
}

// 注册
func Register(c *gin.Context) {
	var request RegisterRequest
	if err := c.ShouldBind(&request); err != nil {
		respondError(c, http.StatusBadRequest, err)
		return
	}

	user := &model.User{Name: request.Name, Password: request.Password}
	if err := model.CreateUser(user); err != nil {
		if errors.Is(err, model.ErrUserNameAlreadyExists) {
			respondError(c, http.StatusConflict, err)
		} else {
			respondUnknownError(c, err)
		}
	} else {
		respondOK(c, &RegisterResponse{UserID: user.ID})
	}
}

type LoginRequest struct {
	Name     string `form:"name" binding:"required"`
	Password string `form:"password" binding:"required"`
}

type LoginResponse struct {
	UserID uint   `json:"id"`
	Token  string `json:"token"`
}

// 登录
func Login(c *gin.Context) {
	var request LoginRequest
	if err := c.ShouldBind(&request); err != nil {
		respondError(c, http.StatusBadRequest, err)
		return
	}

	user := &model.User{Name: request.Name, Password: request.Password}
	if err := model.AuthenticateUser(user); err != nil {
		if errors.Is(err, model.ErrWrongUserNameOrPassword) {
			respondError(c, http.StatusUnauthorized, err)
		} else {
			respondUnknownError(c, err)
		}
	} else if token, err := newToken(user.ID); err != nil {
		respondUnknownError(c, err)
	} else {
		respondOK(c, &LoginResponse{UserID: user.ID, Token: token})
	}
}

type GetCurrentUserResponse struct {
	UserID   uint   `json:"id"`
	UserName string `json:"name"`
}

// 获取当前用户
func GetCurrentUser(c *gin.Context) {
	user := &model.User{Model: gorm.Model{ID: c.MustGet(AuthUserKey).(uint)}}
	if err := model.GetUser(user); err != nil {
		if errors.Is(err, model.ErrUserNotFound) {
			respondError(c, http.StatusNotFound, err)
		} else {
			respondUnknownError(c, err)
		}
	} else {
		respondOK(c, &GetCurrentUserResponse{UserID: user.ID, UserName: user.Name})
	}
}