#include "getsuyomi.hpp"
#include "main_window.hpp"

namespace getsuyomi {

Getsuyomi::Getsuyomi()
{
    m_layout = new QHBoxLayout();

    m_layout->addStretch();

    m_layout->addWidget(&m_pageLeft);
    m_layout->addWidget(&m_pageRight);

    m_layout->addStretch();

    setLayout(m_layout);
}

Getsuyomi::~Getsuyomi() {
    if (m_archive != nullptr) {
        delete m_archive;
    }
}

void Getsuyomi::setArchive(Archive* archive) {
    if (archive == m_archive) {
        return;
    }
    delete(m_archive);
    m_archive = archive;
    m_pageNumber = 0;
    setPages();
}

void Getsuyomi::next() {
    auto numPages = m_archive->numPages();
    size_t increment = 1;
    if (m_pageLayout != PageLayout::Single) {
        increment = 2;
    }
    if ((m_pageNumber + increment) >= numPages)
    {
        return;
    }
    m_pageNumber += increment;
    setPages();
}

void Getsuyomi::back() {
    // auto numPages = m_archive->numPages();
    size_t decrement = 1;
    if (m_pageLayout != PageLayout::Single) {
        decrement = 2;
    }
    if (m_pageNumber < decrement)
    {
        m_pageNumber = 0;
        decrement = 0;
    }
    m_pageNumber -= decrement;
    setPages();
}

void Getsuyomi::setPages() {
    m_pageLeft.setPixmap(QPixmap());
    m_pageRight.setPixmap(QPixmap());

    switch (m_pageLayout)
    {
    case PageLayout::Dual:
        return setPagesDual();
    case PageLayout::Manga:
        return setPagesManga();
    case PageLayout::Single:
    default:
        return setPagesNormal();
    }
}

void Getsuyomi::setPagesNormal() {
    auto page1 = m_archive->getPage(m_pageNumber);
    auto& label1 = m_pageLeft;

    if (page1.isOkay()) {
        label1.setPixmap(QPixmap::fromImage(page1.getOkay()));
    }
}

void Getsuyomi::setPagesDual() {
    auto& label1 = m_pageLeft;
    auto& label2 = m_pageRight;
    setPages(label1, label2);
}

void Getsuyomi::setPagesManga() {
    auto& label1 = m_pageRight;
    auto& label2 = m_pageLeft;
    setPages(label1, label2);
}

void Getsuyomi::setPages(QLabel& label1, QLabel& label2) {
    auto page1 = m_archive->getPage(m_pageNumber);
    auto page2 = m_archive->getPage(m_pageNumber + 1);

    if (page1.isOkay()) {
        label1.setPixmap(QPixmap::fromImage(page1.getOkay()));
    }


    if (page2.isOkay()) {
        label2.setPixmap(QPixmap::fromImage(page1.getOkay()));
    }
}

} // namespace getsuyomi