#include "vconfigmanager.h"
#include <QDir>
#include <QFile>
#include <QString>
#include <QJsonArray>
#include <QJsonObject>
#include <QJsonDocument>
#include <QtDebug>
#include <QTextEdit>
#include "utils/vutils.h"
#include "vstyleparser.h"

const QString VConfigManager::dirConfigFileName = QString(".vnote.json");
VConfigManager* VConfigManager::instance = NULL;

VConfigManager::VConfigManager()
    : baseEditFont(QFont())
{
}

VConfigManager* VConfigManager::getInst()
{
    if (!instance) {
        instance = new VConfigManager();
        instance->initialize();
    }
    return instance;
}

void VConfigManager::initialize()
{
    baseEditFont.setPointSize(11);
    baseEditPalette = QTextEdit().palette();

    updateMarkdownEditStyle();
}

QJsonObject VConfigManager::readDirectoryConfig(const QString &path)
{
    QString configFile = QDir(path).filePath(dirConfigFileName);

    qDebug() << "read config file:" << configFile;
    QFile config(configFile);
    if (!config.open(QIODevice::ReadOnly)) {
        qWarning() << "error: fail to read directory configuration file:"
                   << configFile;
        return QJsonObject();
    }

    QByteArray configData = config.readAll();
    return QJsonDocument::fromJson(configData).object();
}

bool VConfigManager::writeDirectoryConfig(const QString &path, const QJsonObject &configJson)
{
    QString configFile = QDir(path).filePath(dirConfigFileName);

    qDebug() << "write config file:" << configFile;
    QFile config(configFile);
    if (!config.open(QIODevice::WriteOnly)) {
        qWarning() << "error: fail to open directory configuration file for write:"
                   << configFile;
        return false;
    }

    QJsonDocument configDoc(configJson);
    config.write(configDoc.toJson());
    return true;
}

bool VConfigManager::deleteDirectoryConfig(const QString &path)
{
    QString configFile = QDir(path).filePath(dirConfigFileName);

    QFile config(configFile);
    if (!config.remove()) {
        qWarning() << "error: fail to delete directory configuration file:"
                   << configFile;
        return false;
    }
    qDebug() << "delete config file:" << configFile;
    return true;
}

void VConfigManager::updateMarkdownEditStyle()
{
    // Read style file .mdhl
    QString file(":/resources/styles/default.mdhl");

    QString styleStr = VUtils::readFileFromDisk(file);
    if (styleStr.isEmpty()) {
        return;
    }

    VStyleParser parser;
    parser.parseMarkdownStyle(styleStr);
    mdHighlightingStyles = parser.fetchMarkdownStyles(baseEditFont);
    mdEditPalette = parser.fetchMarkdownEditorStyles(baseEditPalette);
}