package handler

import (
	"errors"
	"net/http"

	"github.com/gin-gonic/gin"

	qiniuservice "wx_service/internal/common/qiniu/service"
	"wx_service/internal/middleware"
	"wx_service/internal/model"
)

type UploadHandler struct {
	qiniuService *qiniuservice.QiniuService
}

func NewUploadHandler(qiniuService *qiniuservice.QiniuService) *UploadHandler {
	return &UploadHandler{qiniuService: qiniuService}
}

type qiniuTokenRequest struct {
	// filename 用于保留文件后缀（可选），例如："a.png"、"video.mp4"
	Filename string `json:"filename"`
}

// QiniuToken 返回七牛直传所需的 token/key/upload_url 等信息。
// 建议放在鉴权后：用当前登录用户生成 key，避免前端写入任意路径。
func (h *UploadHandler) QiniuToken(c *gin.Context) {
	user, ok := middleware.CurrentUser(c)
	if !ok {
		c.JSON(http.StatusUnauthorized, model.Error(http.StatusUnauthorized, "未登录或登录已过期"))
		return
	}

	var req qiniuTokenRequest
	_ = c.ShouldBindJSON(&req) // filename 可选，解析失败也不影响生成 token

	token, err := h.qiniuService.CreateUploadToken(user.MiniProgramID, user.ID, req.Filename)
	if err != nil {
		if errors.Is(err, qiniuservice.ErrQiniuNotConfigured) {
			c.JSON(http.StatusServiceUnavailable, model.Error(http.StatusServiceUnavailable, "未配置七牛上传服务，请联系管理员"))
			return
		}
		c.JSON(http.StatusInternalServerError, model.Error(http.StatusInternalServerError, "获取上传凭证失败，请稍后重试"))
		return
	}

	c.JSON(http.StatusOK, model.Success(token))
}