package controllers

import (
	"hr_receiver/config"
	"hr_receiver/models"
	"hr_receiver/util"
	"net/http"

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

type LoginRequest struct {
	Username string `json:"username" binding:"required"`
	Password string `json:"password" binding:"required"`
}

type RegisterRequest struct {
	Username string `json:"username" form:"username"`
	Password string `json:"password" form:"password"`
}

type AuthResponse struct {
	Token string      `json:"token"`
	User  models.User `json:"user"`
}

// Register 用户注册
func Register(c *gin.Context) {
	var req RegisterRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 检查用户名是否已存在
	var existingUser models.User
	if result := config.DB.Where("username = ?", req.Username).First(&existingUser); result.Error == nil {
		c.JSON(http.StatusConflict, gin.H{"error": "Username already exists"})
		return
	}

	// 创建新用户
	user := models.User{
		Username: req.Username,
		Password: req.Password, // BeforeCreate钩子会自动加密
	}

	if result := config.DB.Create(&user); result.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create user"})
		return
	}

	// 生成Token
	token, err := util.GenerateToken(user.ID, user.Username)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to generate token"})
		return
	}

	c.JSON(http.StatusCreated, AuthResponse{
		Token: token,
		User:  user,
	})
}

// Login 用户登录
func Login(c *gin.Context) {
	var req LoginRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 查找用户
	var user models.User
	result := config.DB.Where("username = ?", req.Username).First(&user)

	if result.Error != nil {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid username or password"})
		return
	}

	// 验证密码
	if !user.CheckPassword(req.Password) {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid username or password"})
		return
	}

	// 生成JWT Token
	token, err := util.GenerateToken(user.ID, user.Username)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to generate token"})
		return
	}

	c.JSON(http.StatusOK, AuthResponse{
		Token: token,
		User:  user,
	})
}

// GetProfile 获取用户信息（需要认证）
func GetProfile(c *gin.Context) {
	userID, exists := c.Get("userID")
	if !exists {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
		return
	}

	var user models.User
	if result := config.DB.First(&user, userID); result.Error != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "User not found"})
		return
	}

	c.JSON(http.StatusOK, user)
}