package handler

import (
	"net/http"

	"fashionapi/internal/dto"
	"fashionapi/internal/middleware"
	"fashionapi/internal/pkg/response"
	"fashionapi/internal/service"

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

// AuthHandler 账号体系接口（JWT 无状态）。
type AuthHandler struct {
	auth service.AuthService
}

// NewAuthHandler 创建账号 handler。
func NewAuthHandler(auth service.AuthService) *AuthHandler {
	return &AuthHandler{auth: auth}
}

// Register 注册。
//
// POST /api/auth/register
// 请求体：{ username, email, password }
// 成功：201 { token, user }
func (h *AuthHandler) Register(c *gin.Context) {
	var req dto.AuthRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Error(c, http.StatusBadRequest, "invalid request")
		return
	}

	result, err := h.auth.Register(c.Request.Context(), req)
	if err != nil {
		fail(c, err)
		return
	}
	c.JSON(http.StatusCreated, result)
}

// Login 登录。
//
// POST /api/auth/login
// 请求体：{ account, password }，account 可填邮箱或用户名
// 成功：200 { token, user }
func (h *AuthHandler) Login(c *gin.Context) {
	var req dto.AuthRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.Error(c, http.StatusBadRequest, "invalid request")
		return
	}

	result, err := h.auth.Login(c.Request.Context(), req)
	if err != nil {
		fail(c, err)
		return
	}
	c.JSON(http.StatusOK, result)
}

// Me 当前登录用户，需 Authorization: Bearer <token>。
//
// GET /api/auth/me
// 成功：200 { user }
func (h *AuthHandler) Me(c *gin.Context) {
	userID, ok := middleware.UserIDFrom(c)
	if !ok {
		response.Error(c, http.StatusUnauthorized, "unauthorized")
		return
	}

	user, err := h.auth.Me(c.Request.Context(), userID)
	if err != nil {
		fail(c, err)
		return
	}
	c.JSON(http.StatusOK, gin.H{"user": user})
}