package handler

import (
	"strconv"

	"gotest/internal/middleware"
	"gotest/internal/service"

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

// UserHandler 用户处理器
type UserHandler struct {
	userService *service.UserService
}

// NewUserHandler 创建用户处理器
func NewUserHandler(userService *service.UserService) *UserHandler {
	return &UserHandler{userService: userService}
}

// GetProfile 获取当前用户资料 GET /api/v1/user/profile
func (h *UserHandler) GetProfile(c *gin.Context) {
	userID := middleware.GetUserID(c)
	user, err := h.userService.GetProfile(userID)
	if err != nil {
		FailInternal(c, "获取用户信息失败")
		return
	}
	Success(c, user)
}

// UpdateProfile 更新当前用户资料 PUT /api/v1/user/profile
func (h *UserHandler) UpdateProfile(c *gin.Context) {
	userID := middleware.GetUserID(c)
	var req struct {
		Avatar string `json:"avatar"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		FailBadRequest(c, "参数错误")
		return
	}
	if err := h.userService.UpdateProfile(userID, req.Avatar); err != nil {
		FailInternal(c, "更新失败")
		return
	}
	SuccessMsg(c, "更新成功")
}

// ChangePassword 修改密码 PUT /api/v1/user/password
func (h *UserHandler) ChangePassword(c *gin.Context) {
	userID := middleware.GetUserID(c)
	var req struct {
		OldPassword string `json:"old_password" binding:"required"`
		NewPassword string `json:"new_password" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		FailBadRequest(c, "原密码和新密码不能为空")
		return
	}
	if err := h.userService.ChangePassword(userID, req.OldPassword, req.NewPassword); err != nil {
		FailBadRequest(c, err.Error())
		return
	}
	SuccessMsg(c, "密码修改成功")
}

// ListUsers 用户列表（管理端） GET /api/v1/admin/users
func (h *UserHandler) ListUsers(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "10"))
	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 10
	}

	users, total, err := h.userService.ListUsers(page, pageSize)
	if err != nil {
		FailInternal(c, "查询失败")
		return
	}
	Success(c, gin.H{
		"list":      users,
		"total":     total,
		"page":      page,
		"page_size": pageSize,
	})
}

// CreateUser 创建用户（管理端） POST /api/v1/admin/users
func (h *UserHandler) CreateUser(c *gin.Context) {
	var req struct {
		Username string `json:"username" binding:"required"`
		Password string `json:"password" binding:"required"`
		Phone    string `json:"phone"`
		Role     string `json:"role"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		FailBadRequest(c, "用户名和密码不能为空")
		return
	}
	if req.Role == "" {
		req.Role = "user"
	}
	if err := h.userService.CreateUser(req.Username, req.Password, req.Phone, req.Role); err != nil {
		FailBadRequest(c, err.Error())
		return
	}
	SuccessMsg(c, "创建成功")
}

// UpdateUser 更新用户（管理端） PUT /api/v1/admin/users/:id
func (h *UserHandler) UpdateUser(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		FailBadRequest(c, "无效的用户 ID")
		return
	}
	var req struct {
		Phone  string `json:"phone"`
		Role   string `json:"role"`
		Status int    `json:"status"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		FailBadRequest(c, "参数错误")
		return
	}
	if err := h.userService.UpdateUser(uint(id), req.Phone, req.Role, req.Status); err != nil {
		FailInternal(c, "更新失败")
		return
	}
	SuccessMsg(c, "更新成功")
}

// DeleteUser 删除用户（管理端） DELETE /api/v1/admin/users/:id
func (h *UserHandler) DeleteUser(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		FailBadRequest(c, "无效的用户 ID")
		return
	}
	if err := h.userService.DeleteUser(uint(id)); err != nil {
		FailInternal(c, "删除失败")
		return
	}
	SuccessMsg(c, "删除成功")
}