#include <include/argdialog.h>
#include <ui_argdialog.h>
#include <algorithm>
#include <QDebug>
#include <QStringList>
#include <QIODevice>
#include <vector>
#include <QTableWidgetItem>
#include <QDateTime>
#include <QCalendarWidget>
#include <QMimeDatabase>

ArgDialog::ArgDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::ArgDialog),
    m_task(Task{}),
    m_ig_post(IGPost{})
{
    ui->setupUi(this);
    QObject::connect(ui->addFile, &QPushButton::clicked, this, [this]() {
        QFileDialog file_dialog;
        file_dialog.setStyleSheet("QFileDialog QWidget { color: white; font-weight: 700}");
        auto file_path = file_dialog.getOpenFileName(this,
                                                     tr("Open File"), "~", tr("All Files (*.*)"), nullptr, QFileDialog::DontUseNativeDialog);
        qDebug() << "Selected file:" << file_path;
        if (file_path.size() > 0) {
            auto slash_index = file_path.lastIndexOf("/") + 1;
            QString file_name = file_path.right(file_path.size() - slash_index);
            QString dir = file_path.left(slash_index);
            qDebug() << "Dir is " << dir;
            QMimeDatabase db;
            auto is_video = db.mimeTypeForFile(file_path).name().contains("video");
            addItem(file_name, "file");
            m_ig_post.files.push_back(KFile{
                .name=file_name, .path=file_path, .type = is_video ? FileType::VIDEO : FileType::IMAGE
            });

            if (is_video) {
                qDebug() << "File discovered to be video";
                m_ig_post.is_video = true; // rename to "sending_video"
                QString preview_filename = FileUtils::generatePreview(file_path, file_name);
                // TODO: create some way of verifying preview generation was successful
                addFile("assets/previews/" + preview_filename);
                addItem(preview_filename, "file");
                addFile("assets/previews/" + preview_filename);
                m_ig_post.files.push_back(KFile{
                    .name=preview_filename, .path=QCoreApplication::applicationDirPath() + "/assets/previews/" + preview_filename, .type = is_video ? FileType::VIDEO : FileType::IMAGE
                });
            } else {
                addFile(file_path);
            }
        }
    });

    ui->argList->setHorizontalHeaderLabels(QStringList{"Value", "Type"});
    ui->argList->setColumnWidth(0, 300);
    ui->argList->setColumnWidth(1, 40);
    ui->argList->setColumnWidth(2, 100);
    ui->argList->setColumnWidth(3, 30);
    ui->argList->verticalHeader()->setDefaultSectionSize(100);

    QObject::connect(ui->addArgument, &QPushButton::clicked, this, [this]() {
        QString text = ui->argInput->toPlainText();
        auto type = ui->argType->currentText();
        if (text.size() > 0) {
            if (type == Args::HASHTAG_TYPE) {
                addHashtag(text);
            } else if (type == Args::DESCRIPTION_TYPE) {
                addItem(text, type);
                m_ig_post.description = escapeText(text).toUtf8().constData();
            } else if (type == Args::PROMOTE_TYPE) {
                addOrReplaceInArgList(text, "promote/share");
                m_ig_post.promote_share = text.toUtf8().constData();
            } else if (type == Args::LINK_BIO_TYPE) {
                addOrReplaceInArgList(text, "link/bio");
                m_ig_post.link_in_bio = text.toUtf8().constData();
            } else if (type == Args::REQUESTED_BY_TYPE) {
                addRequestedBy(text);
            }
            ui->argInput->clear();
        }
    });

    QDateTime date_time = QDateTime::currentDateTime();
//    date_time.
    ui->dateTime->setDateTime(QDateTime::currentDateTime());

    QObject::connect(ui->dateTime, &QDateTimeEdit::dateTimeChanged, this, [this]() {
        auto date_time = ui->dateTime->dateTime();
        m_ig_post.datetime = std::string{std::to_string(date_time.toTime_t())};
        qDebug() << "Time changed to" << date_time;
    });

    QObject::connect(ui->argCommandButtons, static_cast<void (QDialogButtonBox::*)(QAbstractButton*)>(&QDialogButtonBox::clicked), this, [this](QAbstractButton* button) {
        if (button->text() == "Save") {
            if (m_ig_post.isReady()) {
                setTaskArguments();
                QVector<KFileData> k_file_v{};
                k_file_v.reserve(m_ig_post.files.size());

                for (const auto& kfile : m_ig_post.files) {
                    QFile file(kfile.path);
                    if (file.open(QIODevice::ReadOnly)) {
                        k_file_v.push_back(KFileData{
                            .type = kfile.type,
                            .name = kfile.name,
                            .bytes = file.readAll()
                        });
                    } else {
                        QMessageBox::warning(
                            this,
                            tr("File Error"),
                            tr("Unable to read file")
                        );
                    }
                }
                if (!k_file_v.empty()) {
                    emit ArgDialog::uploadFiles(k_file_v);
                }

                emit ArgDialog::taskRequestReady(m_task, true);
            }
            defaultPost(); // reset m_ig_post to default values
        }
    });

    QObject::connect(ui->devTestButton, &QPushButton::clicked, this, [this]() {
        clearPost();

        m_ig_post = IGPost{
            .description = escapeText("My description yay!!!").toUtf8().constData(),
            .datetime = std::to_string(QDateTime::currentDateTime().toTime_t() + 12000),
            .promote_share = escapeText("If you enjoy the phrase, please like and share 🙋‍♀️").toUtf8().constData(),
            .link_in_bio = escapeText("Download a FREE PDF of 245 basic verbs (link 🔗 in bio 👆").toUtf8().constData(),
            .hashtags = {"love", "life"},
            .requested_by = {"unwillingagent"},
            .files = {{ .name = "holy.jpg", .path = "/data/c/ky_gui/assets/holy.jpg", .type = FileType::IMAGE }}
        };
    });

    QObject::connect(ui->clear, &QPushButton::clicked, this, [this]() {
        clearPost();
        ui->argList->setRowCount(0);
        qDebug() << "Task cleared";
    });

    QObject::connect(ui->default_args, &QPushButton::clicked, this, [this]() {
        defaultPost();
        ui->argList->setRowCount(0);
        qDebug() << "Task set to default values";
    });
}

void ArgDialog::setTaskArguments() {
    m_task.args.clear();
    std::string hashtags{};
    for (const auto & tag : m_ig_post.hashtags) {
        hashtags += "#" + tag + " ";
    }
    hashtags.pop_back();

    std::string requested_by{};
    for (const auto & name : m_ig_post.requested_by) {
        requested_by += "@" + name + "";
    }
    if (m_ig_post.requested_by.size() > 1) {
        requested_by.pop_back();
    }

//    m_task.args.push_back(m_ig_post.file.name.toUtf8().constData());
    m_task.args.push_back(m_ig_post.datetime);
    m_task.args.push_back(m_ig_post.description);
    m_task.args.push_back(hashtags);
    m_task.args.push_back(requested_by);
    m_task.args.push_back(m_ig_post.requested_by_phrase);
    m_task.args.push_back(m_ig_post.promote_share);
    m_task.args.push_back(m_ig_post.link_in_bio);
    m_task.args.push_back(std::to_string(m_ig_post.is_video));
    m_task.args.push_back(m_ig_post.header);
}

void ArgDialog::addItem(QString value, QString type) {
    QTableWidgetItem* item = new QTableWidgetItem(value);
    QTableWidgetItem* item2 = new QTableWidgetItem(type);
    auto row = ui->argList->rowCount();
    ui->argList->insertRow(row);
    QPushButton* q_pb = new QPushButton();
    q_pb->setText("Delete");
    q_pb->setIcon(std::move(QIcon(":/icons/icons/quit.png")));
    QObject::connect(q_pb, &QPushButton::clicked, this, [this, row]() {
        ui->argList->removeRow(row);
    });
    ui->argList->setItem(row, 0, item);
    ui->argList->setItem(row, 1, item2);
    ui->argList->setCellWidget(row, 2, q_pb);
}

void ArgDialog::addFile(QString path) {
    auto row_count = ui->argList->rowCount();

    QTableWidgetItem* file_item = new QTableWidgetItem();
    QPixmap pm{path};
    file_item->setData(
        Qt::DecorationRole,
        pm.scaledToHeight(ui->argList->rowHeight(0), Qt::TransformationMode::SmoothTransformation)
    );
    ui->argList->setItem(row_count - 1, 2, file_item);

}

void ArgDialog::clearPost() {
    m_ig_post.files.clear();
    m_ig_post.header = "";
    m_ig_post.datetime = "";
    m_ig_post.hashtags = {};
    m_ig_post.description = "";
    m_ig_post.link_in_bio = "";
    m_ig_post.requested_by = {};
    m_ig_post.promote_share = "";
    m_ig_post.requested_by_phrase = "";
}

void ArgDialog::defaultPost() {
    m_ig_post.files.clear();
    m_ig_post.header = "Learn to speak like native Korean speakers 🙆‍♀️🇰🇷";
    m_ig_post.datetime = "";
    m_ig_post.hashtags.clear();
    m_ig_post.description = "";
    m_ig_post.link_in_bio = "Subscribe to my YouTube channel (link 🔗in bio) to learn more about Korean language and culture ❤";
    m_ig_post.requested_by.clear();
    m_ig_post.promote_share = "Share the post through IG story if you enjoy the phrase 🙋‍♀️";
    m_ig_post.requested_by_phrase = "The phrase was requested by ";
}

void ArgDialog::clearTask() {
    m_task.args = {};
    m_task.mask = -1;
}

void ArgDialog::addRequestedBy(QString value) {
    if (std::find(m_ig_post.requested_by.begin(), m_ig_post.requested_by.end(), value.toUtf8().constData()) == m_ig_post.requested_by.end()) {
        m_ig_post.requested_by.push_back(value.toUtf8().constData());
        addToArgList(value, "requested_by");
    } else {
        const char* message = "You have already inputed this name under \"requested_by\"";
        qDebug() << message;
        QMessageBox::warning(
            this,
            tr("Requested By"),
            tr(message)
            );
    }
}

void ArgDialog::addToArgList(QString value, QString type) {
    for (int i = 0; i < ui->argList->rowCount(); i++) {
        auto item = ui->argList->item(i, 1);
        if (item) {
            if (QString::compare(item->text(), type) == 0) {
                auto text = ui->argList->item(i, 0)->text();
                text.append("\n");
                text += value;
                ui->argList->item(i, 0)->setText(text);
                return;
            }
        }
    }
    addItem(value, type);
}

void ArgDialog::addOrReplaceInArgList(QString value, QString type) {
    for (int i = 0; i < ui->argList->rowCount(); i++) {
        auto item = ui->argList->item(i, 1);
        if (item) {
            if (QString::compare(item->text(), type) == 0) {
                ui->argList->item(i, 0)->setText(value);
                return;
            }
        }
    }
    addItem(value, type);
}

void ArgDialog::addHashtag(QString tag) {
    QStringList tags = tag.split(" ");
    for (const auto& tag : tags) {
        if (std::find(m_ig_post.hashtags.begin(), m_ig_post.hashtags.end(), tag.toUtf8().constData()) == m_ig_post.hashtags.end()) {
            m_ig_post.hashtags.push_back(tag.toUtf8().constData());
            addToArgList(tag, "hashtag");
        } else {
            const char* message = "Can't add the same hashtag twice";
            qDebug() << message;
            QMessageBox::warning(
                this,
                tr("Hashtags"),
                tr(message)
                );
        }
    }
}

void ArgDialog::keyPressEvent(QKeyEvent *e) {
    if (Qt::ControlModifier) {
        if(e->key()==Qt::Key_Return || e->key()==Qt::Key_Enter) {
            ui->addArgument->clicked();
            auto idx = ui->argType->currentIndex();
            if (idx != (ui->argType->count() - 1)) {
                ui->argType->setCurrentIndex(idx + 1);
            }
        }
    }
}

ArgDialog::~ArgDialog()
{
    delete ui;
}