#include "photoitemwidget.h"

#include <QDate>
#include <QDateEdit>
#include <QHBoxLayout>
#include <QImageReader>
#include <QLabel>
#include <QLineEdit>
#include <QPixmap>
#include <QPushButton>
#include <QVBoxLayout>

namespace {
constexpr int kThumbSize = 72;
}

PhotoItemWidget::PhotoItemWidget(QString sourcePath, QWidget *parent)
    : QWidget(parent)
    , m_sourcePath(std::move(sourcePath))
{
    auto *row = new QHBoxLayout(this);
    row->setContentsMargins(0, 4, 0, 4);

    m_thumb = new QLabel;
    m_thumb->setFixedSize(kThumbSize, kThumbSize);
    m_thumb->setAlignment(Qt::AlignCenter);
    m_thumb->setFrameShape(QFrame::Box);
    {
        QImageReader reader(m_sourcePath);
        reader.setAutoTransform(true);
        const QImage image = reader.read();
        if (!image.isNull())
            m_thumb->setPixmap(QPixmap::fromImage(image).scaled(
                kThumbSize, kThumbSize, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation));
        else
            m_thumb->setText(QStringLiteral("?"));
    }
    row->addWidget(m_thumb);

    auto *fields = new QVBoxLayout;
    m_caption = new QLineEdit;
    m_caption->setPlaceholderText(QStringLiteral("Caption (defaults to the filename)"));
    fields->addWidget(m_caption);

    m_date = new QDateEdit(QDate::currentDate());
    m_date->setCalendarPopup(true);
    m_date->setDisplayFormat(QStringLiteral("yyyy-MM-dd"));
    fields->addWidget(m_date);

    m_statusLabel = new QLabel;
    m_statusLabel->setOpenExternalLinks(true);
    m_statusLabel->setWordWrap(true);
    fields->addWidget(m_statusLabel);
    row->addLayout(fields, 1);

    m_remove = new QPushButton(QStringLiteral("✕"));
    m_remove->setFlat(true);
    m_remove->setFixedWidth(32);
    connect(m_remove, &QPushButton::clicked, this, [this]() { emit removeRequested(this); });
    row->addWidget(m_remove, 0, Qt::AlignTop);
}

QString PhotoItemWidget::caption() const
{
    return m_caption->text();
}

QString PhotoItemWidget::date() const
{
    return m_date->date().toString(QStringLiteral("yyyy-MM-dd"));
}

void PhotoItemWidget::setStatus(Status status, const QString &message, const QString &url)
{
    m_status = status;

    // Inputs are frozen once the photo is in flight; the remove button stays
    // usable except mid-transfer.
    const bool editable = status == Status::Pending || status == Status::Error;
    m_caption->setEnabled(editable);
    m_date->setEnabled(editable);
    m_remove->setEnabled(status != Status::Preparing && status != Status::Uploading);

    switch (status) {
    case Status::Pending:
        m_statusLabel->clear();
        break;
    case Status::Preparing:
        m_statusLabel->setText(QStringLiteral("Preparing…"));
        break;
    case Status::Uploading:
        m_statusLabel->setText(QStringLiteral("Uploading…"));
        break;
    case Status::Success:
        m_statusLabel->setText(QStringLiteral("Posted — <a href=\"%1\">View</a>").arg(url));
        break;
    case Status::Error:
        m_statusLabel->setText(QStringLiteral("<span style=\"color:#fb4934\">%1</span>").arg(message));
        break;
    }
}