package task

import (
	"fmt"
	"net/http"
	"path/filepath"
	"strconv"
	"time"

	"task-track-backend/model"
	"task-track-backend/pkg/database"

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

func (h *TaskHandler) AddTaskAttachment(c *gin.Context) {
	// 获取任务ID
	taskIDStr := c.Param("id")
	taskID, err := strconv.ParseUint(taskIDStr, 10, 32)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的任务ID"})
		return
	}

	// 获取上传的用户ID
	userIDStr := c.PostForm("user_id")
	if userIDStr == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "用户ID不能为空"})
		return
	}

	userID, err := strconv.ParseUint(userIDStr, 10, 32)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的用户ID"})
		return
	}

	// 处理文件上传
	file, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "文件上传失败"})
		return
	}

	db := database.GetDB()

	// 检查任务是否存在
	var existingTask model.Task
	if err := db.First(&existingTask, uint(taskID)).Error; err != nil {
		if err.Error() == "record not found" {
			c.JSON(http.StatusNotFound, gin.H{"error": "任务不存在"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "查询任务失败"})
		return
	}

	// 生成文件名和路径
	timestamp := time.Now().UnixNano()
	fileName := file.Filename
	filePath := fmt.Sprintf("uploads/%d_%s", timestamp, fileName)

	// 保存文件
	if err := c.SaveUploadedFile(file, filePath); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "保存文件失败"})
		return
	}

	// 创建附件记录
	attachment := model.TaskAttachment{
		TaskID:     uint(taskID),
		FileName:   fileName,
		FilePath:   filePath,
		FileSize:   file.Size,
		FileType:   filepath.Ext(fileName),
		UploadedBy: uint(userID),
		CreatedAt:  time.Now(),
	}

	if err := db.Create(&attachment).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "创建附件记录失败"})
		return
	}

	c.JSON(http.StatusCreated, attachment)
}