//
//  HttpManager.cpp
//  hifi
//
//  Created by Stephen Birarda on 1/16/14.
//  Copyright (c) 2014 HighFidelity, Inc. All rights reserved.
//
//  Heavily based on Andrzej Kapolka's original HttpManager class
//  found from another one of his projects.
//  (https://github.com/ey6es/witgap/tree/master/src/cpp/server/http)
//

#include <QtCore/QDebug>
#include <QtCore/QFile>
#include <QtCore/QFileInfo>
#include <QtCore/QMimeDatabase>
#include <QtNetwork/QTcpSocket>

#include "HttpConnection.h"
#include "HttpManager.h"

bool HttpManager::handleRequest(HttpConnection* connection, const QString& path) {
    QString subPath = path;
    
    // remove any slash at the beginning of the path
    if (subPath.startsWith('/')) {
        subPath.remove(0, 1);
    }
    
    QString filePath;
    
    // if the last thing is a trailing slash then we want to look for index file
    if (subPath.endsWith('/') || subPath.size() == 0) {
        QStringList possibleIndexFiles = QStringList() << "index.html" << "index.shtml";
        
        foreach (const QString& possibleIndexFilename, possibleIndexFiles) {
            if (QFileInfo(_documentRoot + subPath + possibleIndexFilename).exists()) {
                filePath = _documentRoot + subPath + possibleIndexFilename;
                break;
            }
        }
    } else if (QFileInfo(_documentRoot + subPath).isFile()) {
        filePath = _documentRoot + subPath;
    }
    
    if (!filePath.isEmpty()) {
        static QMimeDatabase mimeDatabase;
        
        qDebug() << "Serving file at" << filePath;
        
        QFile localFile(filePath);
        localFile.open(QIODevice::ReadOnly);
        
        connection->respond("200 OK", localFile.readAll(), qPrintable(mimeDatabase.mimeTypeForFile(filePath).name()));
    } else {
        // respond with a 404
        connection->respond("404 Not Found", "Resource not found.");
    }
    
    return true;
}

HttpManager::HttpManager(quint16 port, const QString& documentRoot, QObject* parent) :
    QTcpServer(parent),
    _documentRoot(documentRoot) {
    // start listening on the passed port
    if (!listen(QHostAddress("0.0.0.0"), port)) {
        qDebug() << "Failed to open HTTP server socket:" << errorString();
        return;
    }
    
    // connect the connection signal
    connect(this, SIGNAL(newConnection()), SLOT(acceptConnections()));
}

void HttpManager::acceptConnections() {
    QTcpSocket* socket;
    while ((socket = nextPendingConnection()) != 0) {
        new HttpConnection(socket, this);
    }
}