package handlers

import (
	"fmt"
	"net/http"
	"path/filepath"
	"strconv"
	"threadr/models"
)

func FileHandler(app *App) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		fileIDStr := r.URL.Query().Get("id")
		fileID, err := strconv.ParseInt(fileIDStr, 10, 64)
		if err != nil {
			http.NotFound(w, r)
			return
		}

		file, err := models.GetFileByID(app.DB, fileID)
		if err != nil || file == nil {
			http.NotFound(w, r)
			return
		}

		fileExt := filepath.Ext(file.OriginalName)
		fileName := fmt.Sprintf("%d%s", fileID, fileExt)
		filePath := filepath.Join(app.Config.FileStorageDir, fileName)

		http.ServeFile(w, r, filePath)
	}
}