const webdav = require('webdav-server').v2;
const fs = require('fs');
const path = require('path');

const adminUser = process.env.WEBDAV_USER || 'admin';
const adminPass = process.env.WEBDAV_PASS || 'password';
const WEB_URL = process.env.WEB_URL || 'localhost';
const PROTOCOLE = process.env.PROTOCOLE || 'http';
const ALLOWED_ORIGIN = `${PROTOCOLE}://${WEB_URL}`;
const ROOT_DIR = '/data';

// Auth
const userManager = new webdav.SimpleUserManager();
const user = userManager.addUser(adminUser, adminPass, false);
const privilegeManager = new webdav.SimplePathPrivilegeManager();
privilegeManager.setRights(user, '/', ['all']);

// ✅ LoggingFileSystem étend PhysicalFileSystem
class LoggingFileSystem extends webdav.PhysicalFileSystem {
    move(ctx, source, destination, callback) {
        console.log(`🟡 MOVE requested from ${source.toString()} to ${destination.toString()}`);

        const srcPath = path.join(ROOT_DIR, source.toString());
        const destPath = path.join(ROOT_DIR, destination.toString());

        fs.promises.mkdir(path.dirname(destPath), { recursive: true })
            .then(() => fs.promises.rename(srcPath, destPath))
            .then(() => {
                console.log(`✅ MOVE succeeded: ${srcPath} -> ${destPath}`);
                if (typeof callback === 'function') callback(null);
            })
            .catch(err => {
                console.error(`❌ MOVE failed: ${err.message}`);
                if (typeof callback === 'function') callback(err);
            });
    }

}

// Serveur WebDAV
const server = new webdav.WebDAVServer({
    port: 9999,
    hostname: '0.0.0.0',
    httpAuthentication: new webdav.HTTPBasicAuthentication(userManager, 'default realm'),
    privilegeManager,
    rootFileSystem: new LoggingFileSystem(ROOT_DIR),
    responseHeaders: {
        'Access-Control-Allow-Origin': ALLOWED_ORIGIN,
        'Access-Control-Allow-Credentials': 'true',
        'Access-Control-Allow-Headers': 'Authorization, Depth, Content-Type',
        'Access-Control-Allow-Methods': 'GET, PUT, OPTIONS, MKCOL, PROPFIND, DELETE, COPY, MOVE, LOCK, UNLOCK'
    }
});

// Ajout header Last-Modified
server.beforeRequest((arg, next) => {
    const { request, response, requested } = arg;

    if (request.method === 'GET' || request.method === 'HEAD') {
        const filePath = path.join(ROOT_DIR, decodeURIComponent(requested.path.toString()));
        fs.stat(filePath, (err, stats) => {
            if (!err && stats.isFile()) {
                response.setHeader('Last-Modified', stats.mtime.toUTCString());
                console.log(`[INFO] Added Last-Modified: ${stats.mtime.toUTCString()} for ${filePath}`);
            }
            next();
        });
    } else {
        next();
    }
});

// Start
server.start(() => {
    console.log(`✅ WebDAV server ready at http://0.0.0.0:9999`);
    console.log(`🔐 Auth: user="${adminUser}", pass="***"`);
    console.log(`🌐 CORS: Allow-Origin = ${ALLOWED_ORIGIN}`);
});