/* 
 * Copyright (C) 2024 Petr Mironychev
 *
 * This file is part of QodeAssist.
 *
 * QodeAssist is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * QodeAssist is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
 */

#include "ContextManager.hpp"

#include <QFile>
#include <QFileInfo>
#include <QTextStream>

#include <projectexplorer/project.h>
#include <projectexplorer/projectnodes.h>

#include "FileChunker.hpp"

namespace QodeAssist::Context {

ContextManager &ContextManager::instance()
{
    static ContextManager manager;
    return manager;
}

ContextManager::ContextManager(QObject *parent)
    : QObject(parent)
{}

QString ContextManager::readFile(const QString &filePath) const
{
    QFile file(filePath);
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
        return QString();

    QTextStream in(&file);
    return in.readAll();
}

QList<ContentFile> ContextManager::getContentFiles(const QStringList &filePaths) const
{
    QList<ContentFile> files;
    for (const QString &path : filePaths) {
        ContentFile contentFile = createContentFile(path);
        files.append(contentFile);
    }
    return files;
}

ContentFile ContextManager::createContentFile(const QString &filePath) const
{
    ContentFile contentFile;
    QFileInfo fileInfo(filePath);
    contentFile.filename = fileInfo.fileName();
    contentFile.content = readFile(filePath);
    return contentFile;
}

bool ContextManager::isInBuildDirectory(const QString &filePath) const
{
    static const QStringList buildDirPatterns
        = {QString(QDir::separator()) + QLatin1String("build") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("Build") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("BUILD") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("debug") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("Debug") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("DEBUG") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("release") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("Release") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("RELEASE") + QDir::separator(),
           QString(QDir::separator()) + QLatin1String("builds") + QDir::separator()};

    // Нормализуем путь
    QString normalizedPath = QDir::fromNativeSeparators(filePath);

    // Проверяем, содержит ли путь паттерны build-директории
    for (const QString &pattern : buildDirPatterns) {
        // Сравниваем с нормализованным паттерном
        QString normalizedPattern = QDir::fromNativeSeparators(pattern);
        if (normalizedPath.contains(normalizedPattern)) {
            qDebug() << "Skipping build file:" << filePath;
            return true;
        }
    }

    return false;
}

QStringList ContextManager::getProjectSourceFiles(ProjectExplorer::Project *project) const
{
    QStringList sourceFiles;
    if (!project)
        return sourceFiles;

    auto projectNode = project->rootProjectNode();
    if (!projectNode)
        return sourceFiles;

    projectNode->forEachNode(
        [&sourceFiles, this](ProjectExplorer::FileNode *fileNode) {
            if (fileNode) {
                QString filePath = fileNode->filePath().toString();
                if (shouldProcessFile(filePath) && !isInBuildDirectory(filePath)) {
                    sourceFiles.append(filePath);
                }
            }
        },
        nullptr);

    return sourceFiles;
}

bool ContextManager::shouldProcessFile(const QString &filePath) const
{
    static const QStringList supportedExtensions
        = {"cpp", "hpp", "c", "h", "cc", "hh", "cxx", "hxx", "qml", "js", "py"};

    QFileInfo fileInfo(filePath);
    return supportedExtensions.contains(fileInfo.suffix().toLower());
}

void ContextManager::testProjectChunks(
    ProjectExplorer::Project *project, const FileChunker::ChunkingConfig &config)
{
    if (!project) {
        qDebug() << "No project provided";
        return;
    }

    qDebug() << "\nStarting test chunking for project:" << project->displayName();

    // Get source files
    QStringList sourceFiles = getProjectSourceFiles(project);
    qDebug() << "Found" << sourceFiles.size() << "source files";

    // Create chunker
    auto chunker = new FileChunker(config, this);

    // Connect progress and error signals
    connect(chunker, &FileChunker::progressUpdated, this, [](int processed, int total) {
        qDebug() << "Progress:" << processed << "/" << total << "files";
    });

    connect(chunker, &FileChunker::error, this, [](const QString &error) {
        qDebug() << "Error:" << error;
    });

    // Start chunking and handle results
    auto future = chunker->chunkFiles(sourceFiles);

    // Используем QFutureWatcher для обработки результатов
    auto watcher = new QFutureWatcher<QList<FileChunk>>(this);

    connect(watcher, &QFutureWatcher<QList<FileChunk>>::finished, this, [watcher, chunker]() {
        // Очистка
        watcher->deleteLater();
        chunker->deleteLater();
    });

    watcher->setFuture(future);
}

} // namespace QodeAssist::Context