#include "vnotefile.h"

#include <QDir>
#include <QDebug>
#include <QTextEdit>
#include <QFileInfo>
#include <QJsonObject>
#include <QJsonArray>
#include <QDebug>

#include "utils/vutils.h"
#include "vdirectory.h"

VNoteFile::VNoteFile(VDirectory *p_directory,
                     const QString &p_name,
                     FileType p_type,
                     bool p_modifiable,
                     QDateTime p_createdTimeUtc,
                     QDateTime p_modifiedTimeUtc,
                     const QString &p_attachmentFolder,
                     const QVector<VAttachment> &p_attachments)
    : VFile(p_directory, p_name, p_type, p_modifiable, p_createdTimeUtc, p_modifiedTimeUtc),
      m_attachmentFolder(p_attachmentFolder),
      m_attachments(p_attachments)
{
}

QString VNoteFile::fetchPath() const
{
    return QDir(getDirectory()->fetchPath()).filePath(m_name);
}

QString VNoteFile::fetchBasePath() const
{
    return getDirectory()->fetchPath();
}

QString VNoteFile::fetchImageFolderPath() const
{
    return QDir(fetchBasePath()).filePath(getNotebook()->getImageFolder());
}

bool VNoteFile::useRelativeImageFolder() const
{
    // Always use relative image folder.
    return true;
}

QString VNoteFile::getImageFolderInLink() const
{
    return getNotebook()->getImageFolder();
}

void VNoteFile::setName(const QString &p_name)
{
    Q_ASSERT(m_name.isEmpty()
             || (m_docType == VUtils::docTypeFromName(p_name)));

    m_name = p_name;
}

bool VNoteFile::rename(const QString &p_name)
{
    if (m_name == p_name) {
        return true;
    }

    QString oldName = m_name;

    VDirectory *dir = getDirectory();
    Q_ASSERT(dir);

    // Rename it in disk.
    QDir diskDir(dir->fetchPath());
    if (!diskDir.rename(m_name, p_name)) {
        qWarning() << "fail to rename file" << m_name << "to" << p_name << "in disk";
        return false;
    }

    m_name = p_name;

    // Update parent directory's config file.
    if (!dir->writeToConfig()) {
        m_name = oldName;
        diskDir.rename(p_name, m_name);
        return false;
    }

    // Can't not change doc type.
    Q_ASSERT(m_docType == VUtils::docTypeFromName(m_name));

    qDebug() << "file renamed from" << oldName << "to" << m_name;
    return true;
}

VDirectory *VNoteFile::getDirectory()
{
    Q_ASSERT(parent());
    return (VDirectory *)parent();
}

const VDirectory *VNoteFile::getDirectory() const
{
    Q_ASSERT(parent());
    return (const VDirectory *)parent();
}

VNotebook *VNoteFile::getNotebook()
{
    return getDirectory()->getNotebook();
}

const VNotebook *VNoteFile::getNotebook() const
{
    return getDirectory()->getNotebook();
}

QString VNoteFile::getNotebookName() const
{
    return getDirectory()->getNotebookName();
}

QString VNoteFile::fetchRelativePath() const
{
    return QDir(getDirectory()->fetchRelativePath()).filePath(m_name);
}

VNoteFile *VNoteFile::fromJson(VDirectory *p_directory,
                               const QJsonObject &p_json,
                               FileType p_type,
                               bool p_modifiable)
{
    // Attachments.
    QJsonArray attachmentJson = p_json[DirConfig::c_attachments].toArray();
    QVector<VAttachment> attachments;
    for (int i = 0; i < attachmentJson.size(); ++i) {
        QJsonObject attachmentItem = attachmentJson[i].toObject();
        attachments.push_back(VAttachment(attachmentItem[DirConfig::c_name].toString()));
    }

    return new VNoteFile(p_directory,
                         p_json[DirConfig::c_name].toString(),
                         p_type,
                         p_modifiable,
                         QDateTime::fromString(p_json[DirConfig::c_createdTime].toString(),
                                               Qt::ISODate),
                         QDateTime::fromString(p_json[DirConfig::c_modifiedTime].toString(),
                                               Qt::ISODate),
                         p_json[DirConfig::c_attachmentFolder].toString(),
                         attachments);
}

QJsonObject VNoteFile::toConfigJson() const
{
    QJsonObject item;
    item[DirConfig::c_name] = m_name;
    item[DirConfig::c_createdTime] = m_createdTimeUtc.toString(Qt::ISODate);
    item[DirConfig::c_modifiedTime] = m_modifiedTimeUtc.toString(Qt::ISODate);
    item[DirConfig::c_attachmentFolder] = m_attachmentFolder;

    // Attachments.
    QJsonArray attachmentJson;
    for (int i = 0; i < m_attachments.size(); ++i) {
        const VAttachment &item = m_attachments[i];
        QJsonObject attachmentItem;
        attachmentItem[DirConfig::c_name] = item.m_name;
        attachmentJson.append(attachmentItem);
    }

    item[DirConfig::c_attachments] = attachmentJson;

    return item;
}

bool VNoteFile::deleteFile()
{
    Q_ASSERT(parent());

    bool ret = false;

    // Delete local images if it is Markdown.
    if (m_docType == DocType::Markdown) {
        deleteInternalImages();
    }

    // TODO: Delete attachments.

    // Delete the file.
    QString filePath = fetchPath();
    if (VUtils::deleteFile(getNotebook(), filePath, false)) {
        ret = true;
        qDebug() << "deleted" << m_name << filePath;
    } else {
        qWarning() << "fail to delete" << m_name << filePath;
    }

    return ret;
}

void VNoteFile::deleteInternalImages()
{
    Q_ASSERT(parent() && m_docType == DocType::Markdown);

    QVector<ImageLink> images = VUtils::fetchImagesFromMarkdownFile(this,
                                                                    ImageLink::LocalRelativeInternal);
    int deleted = 0;
    for (int i = 0; i < images.size(); ++i) {
        if (VUtils::deleteFile(getNotebook(), images[i].m_path, false)) {
            ++deleted;
        }
    }

    qDebug() << "delete" << deleted << "images for" << m_name << fetchPath();
}

bool VNoteFile::addAttachment(const QString &p_file)
{
    if (p_file.isEmpty() || !QFileInfo::exists(p_file)) {
        return false;
    }

    QString folderPath = fetchAttachmentFolderPath();
    QString name = VUtils::fileNameFromPath(p_file);
    Q_ASSERT(!name.isEmpty());
    name = VUtils::getFileNameWithSequence(folderPath, name);
    QString destPath = QDir(folderPath).filePath(name);
    if (!VUtils::copyFile(p_file, destPath, false)) {
        return false;
    }

    m_attachments.push_back(VAttachment(name));

    if (!getDirectory()->updateFileConfig(this)) {
        qWarning() << "fail to update config of file" << m_name
                   << "in directory" << fetchBasePath();
        return false;
    }

    return true;
}

QString VNoteFile::fetchAttachmentFolderPath()
{
    QString folderPath = QDir(fetchBasePath()).filePath(getNotebook()->getAttachmentFolder());
    if (m_attachmentFolder.isEmpty()) {
        m_attachmentFolder = VUtils::getRandomFileName(folderPath);
    }

    folderPath = QDir(folderPath).filePath(m_attachmentFolder);
    if (!QFileInfo::exists(folderPath)) {
        QDir dir;
        if (!dir.mkpath(folderPath)) {
            qWarning() << "fail to create attachment folder of notebook" << m_name << folderPath;
        }
    }

    return folderPath;
}

bool VNoteFile::deleteAttachments()
{
    if (m_attachments.isEmpty()) {
        return true;
    }

    QVector<QString> attas;
    for (int i = 0; i < m_attachments.size(); ++i) {
        attas.push_back(m_attachments[i].m_name);
    }

    return deleteAttachments(attas);
}

bool VNoteFile::deleteAttachments(const QVector<QString> &p_names)
{
    if (p_names.isEmpty()) {
        return true;
    }

    QDir dir(fetchAttachmentFolderPath());
    bool ret = true;
    for (int i = 0; i < p_names.size(); ++i) {
        int idx = findAttachment(p_names[i]);
        if (idx == -1) {
            ret = false;
            continue;
        }

        m_attachments.remove(idx);
        if (!VUtils::deleteFile(getNotebook(), dir.filePath(p_names[i]), false)) {
            ret = false;
            qWarning() << "fail to delete attachment" << p_names[i]
                       << "for note" << m_name;
        }
    }

    if (!getDirectory()->updateFileConfig(this)) {
        qWarning() << "fail to update config of file" << m_name
                   << "in directory" << fetchBasePath();
        ret = false;
    }

    return ret;
}

int VNoteFile::findAttachment(const QString &p_name, bool p_caseSensitive)
{
    const QString name = p_caseSensitive ? p_name : p_name.toLower();
    for (int i = 0; i < m_attachments.size(); ++i) {
        QString attaName = p_caseSensitive ? m_attachments[i].m_name
                                           : m_attachments[i].m_name.toLower();
        if (name == attaName) {
            return i;
        }
    }

    return -1;
}

void VNoteFile::sortAttachments(QVector<int> p_sortedIdx)
{
    V_ASSERT(m_opened);
    V_ASSERT(p_sortedIdx.size() == m_attachments.size());

    auto oriFiles = m_attachments;

    for (int i = 0; i < p_sortedIdx.size(); ++i) {
        m_attachments[i] = oriFiles[p_sortedIdx[i]];
    }

    if (!getDirectory()->updateFileConfig(this)) {
        qWarning() << "fail to reorder files in config" << p_sortedIdx;
        m_attachments = oriFiles;
    }
}

bool VNoteFile::renameAttachment(const QString &p_oldName, const QString &p_newName)
{
    int idx = findAttachment(p_oldName);
    if (idx == -1) {
        return false;
    }

    QDir dir(fetchAttachmentFolderPath());
    if (!dir.rename(p_oldName, p_newName)) {
        qWarning() << "fail to rename attachment file" << p_oldName << p_newName;
        return false;
    }

    m_attachments[idx].m_name = p_newName;

    if (!getDirectory()->updateFileConfig(this)) {
        qWarning() << "fail to rename attachment in config" << p_oldName << p_newName;

        m_attachments[idx].m_name = p_oldName;
        dir.rename(p_newName, p_oldName);

        return false;
    }

    return true;
}