import path from "path";
import multer from "multer";
import { v4 as uuidv4 } from "uuid";
import fs from "fs";

// Ensure uploads directory exists
const UPLOAD_DIR = path.resolve("uploads");
if (!fs.existsSync(UPLOAD_DIR)) {
    fs.mkdirSync(UPLOAD_DIR, { recursive: true });
}

// Configure multer storage
const storage = multer.diskStorage({
    destination: (req, file, cb) => {
        cb(null, UPLOAD_DIR);
    },
    filename: (req, file, cb) => {
        const ext = path.extname(file.originalname).toLowerCase();
        const filename = `${uuidv4()}${ext}`;
        cb(null, filename);
    },
});

// Configure file filter (images only)
const fileFilter = (req: any, file: any, cb: any) => {
    const allowedTypes = /jpeg|jpg|png|webp|gif/;
    const ext = path.extname(file.originalname).toLowerCase();

    if (allowedTypes.test(ext)) {
        cb(null, true);
    } else {
        cb(new Error("Type de fichier non supporté. Seules les images (JPEG, PNG, WEBP, GIF) sont acceptées."), false);
    }
};

// Export pre-configured upload middleware
export const upload = multer({
    storage: storage,
    limits: {
        fileSize: 5 * 1024 * 1024, // 5 MB limit
    },
    fileFilter: fileFilter,
});