package handlers

import (
	"fmt"
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
	"github.com/niangaodev/art-code/models"
	"github.com/niangaodev/art-code/repositories"
	"golang.org/x/crypto/bcrypt"
)

// GetUsers 获取所有用户
func AdminGetUsers(c *gin.Context) {
	users, err := repositories.GetUsers()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get users"})
		return
	}

	c.JSON(http.StatusOK, repositories.BuildUsersResponse(users))
}

// GetUser 获取单个用户
func AdminGetUser(c *gin.Context) {
	idStr := c.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid user ID"})
		return
	}

	user, err := repositories.GetUserByID(uint(id))
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get user"})
		return
	}

	if user == nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "User not found"})
		return
	}

	// 构建响应
	response := repositories.BuildUserResponse(user)

	// 设置响应头
	c.Header("Content-Type", "application/json; charset=utf-8")

	// 返回JSON响应
	c.JSON(http.StatusOK, response)
}

// CreateUser 创建用户
func AdminCreateUser(c *gin.Context) {
	var user models.User
	if err := c.ShouldBindJSON(&user); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"})
		return
	}

	// 设置默认密码并使用bcrypt哈希
	defaultPassword := "admin123"
	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(defaultPassword), bcrypt.DefaultCost)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to hash password"})
		return
	}
	user.PasswordHash = string(hashedPassword)

	// 创建用户
	if err := repositories.CreateUser(&user); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create user"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "User created successfully"})
}

// UpdateUser 更新用户
func AdminUpdateUser(c *gin.Context) {
	userID := c.Param("id")
	var user models.User
	if err := c.ShouldBindJSON(&user); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"})
		return
	}

	// 转换用户ID为uint
	var idUint uint
	_, err := fmt.Sscanf(userID, "%d", &idUint)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid user ID"})
		return
	}

	// 设置用户ID
	user.ID = idUint

	// 更新用户
	if err := repositories.UpdateUser(&user); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update user"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "User updated successfully"})
}

// DeleteUser 删除用户
func AdminDeleteUser(c *gin.Context) {
	userID := c.Param("id")

	// 转换用户ID为uint
	var idUint uint
	_, err := fmt.Sscanf(userID, "%d", &idUint)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid user ID"})
		return
	}

	// 删除用户
	if err := repositories.DeleteUser(idUint); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to delete user"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "User deleted successfully"})
}