/*
    Copyright (C) 2022 Lari Varjonen <[email protected]>

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    This program 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 this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

#include "draw_pixmap.h"


void DrawPixmap::draw_pixmap(const QString SIGNATURE_TEXT)
{
    if (images.isEmpty())
    {
        return;
    }

    QPixmap *pixmap = new QPixmap(width_spin, starting_height);
    pixmap->fill(Qt::black);

    QPainter *painter = new QPainter(pixmap);
    painter->setPen(Qt::white);

    QFont font;
    font.setFamily("Arial");
    font.setPixelSize(16);
    font.setItalic(true);
    font.setWeight(QFont::Thin);
    painter->setFont(font);

    QPoint point;
    int y_pos = 0;

    if (!file_text.isEmpty())
    {
        y_pos += 16;
        point = QPoint(2, y_pos);
        painter->drawText(point, QString("File: ") + file_text);
        y_pos += 2;
    }

    if (!size_text.isEmpty())
    {
        y_pos += 16;
        point = QPoint(2, y_pos);
        painter->drawText(point, QString("Size: ") + size_text);
        y_pos += 2;
    }

    if (!audio_text.isEmpty())
    {
        y_pos += 16;
        point = QPoint(2, y_pos);
        painter->drawText(point, QString("Audio: ") + audio_text);
        y_pos += 2;
    }

    if (!video_text.isEmpty())
    {
        y_pos += 16;
        point = QPoint(2, y_pos);
        painter->drawText(point, QString("Video: ") + video_text);
        y_pos += 2;
    }

    if (!hide_signature)
    {
        y_pos += 16;
        point = QPoint(2, y_pos);
        painter->drawText(point, QString("Generated by ") + SIGNATURE_TEXT);
        y_pos += 2;
    }

    if (y_pos != 0)
    {
        y_pos += 4;
    }

    int x = 0;
    int f = divider_spin;
    int img_scaled_height = images.at(0).height();

    for (qsizetype i = 0; i < images.size(); i++)
    {
        if (i == f)
        {
            f = i + divider_spin;
            y_pos += images.at(i).height();
            x = 0;
        }

        if (y_pos + images.at(i).height() > starting_height)
        {
            starting_height = y_pos + images.at(i).height();

            QPixmap *new_pixmap = new QPixmap(width_spin, starting_height);
            new_pixmap->fill(Qt::black);

            QPainter *new_painter = new QPainter(new_pixmap);
            new_painter->drawPixmap(0, 0, pixmap->width(), pixmap->height(), *pixmap);

            delete painter;
            delete pixmap;

            pixmap = new_pixmap;
            painter = new_painter;
        }

        point = QPoint(x, y_pos);
        painter->drawImage(point, images.at(i));

        if (!hide_timestamp)
        {
            font.setFamily("Arial");
            font.setStyle(QFont::StyleItalic);
            font.setStyleHint(QFont::AnyStyle);
            font.setPixelSize(12);
            font.setItalic(true);
            font.setWeight(QFont::Thin);
            painter->setFont(font);

            QString time = time_stamps[i];
            QFontMetrics fm(font);
            int text_width = fm.horizontalAdvance(time);

            int text_x = x + images.at(i).width() - text_width - 1;
            int text_y = (y_pos + images.at(i).height()) - 1;

            point = QPoint(text_x, text_y);
            painter->setPen(Qt::black);
            painter->drawText(point, time);

            point = QPoint(text_x - 1, text_y - 1);
            painter->setPen(Qt::white);
            painter->drawText(point, time);
        }

        x += images.at(i).width();
    }

    QRect rect(0, 0, width_spin, y_pos + img_scaled_height);
    generated_pixmap = pixmap->copy(rect);

    delete painter;
    delete pixmap;
}