#include "header.h"
#include "readerview.h"
#include "mods.h"
#include <gtk/gtk.h>

Header::Header(ReaderView *reader, Gtk::Window *window)
: back(), forward(), book(), menu(), bookMenu(), menuMenu()
{
    this->mods = new Mods(this, window);
    this->reader = reader;
    this->window = window;
    set_show_close_button(true);
    set_title("Bible Reader");
    set_has_subtitle(false);

    back.set_image_from_icon_name("go-previous-symbolic");
    forward.set_image_from_icon_name("go-next-symbolic");
    menu.set_image_from_icon_name("open-menu-symbolic");

    back.signal_clicked().connect([reader, this]() {
        reader->setChapter(reader->getChapter() - 1);
        updateButtons();
    });

    forward.signal_clicked().connect([reader, this]() {
        reader->setChapter(reader->getChapter() + 1);
        updateButtons();
    });

    pack_start(back);
    pack_start(book);
    pack_start(forward);
    pack_end(menu);

    book.set_popover(bookMenu);
    menu.set_popover(menuMenu);

    updateButtons();
    updateMenus();
}

Header::~Header() {}

void Header::updateButtons() {
    reader->refresh();
    back.set_sensitive(reader->getChapter() > 1);
    forward.set_sensitive(reader->getChapter() < reader->getChapterMax());
    if(reader->getBook() == "") {
        book.set_label("");
        book.set_sensitive(false);
    } else {
        book.set_label(reader->getBook() + " " + std::to_string(reader->getChapter()));
        book.set_sensitive(true);
    }
}

void Header::updateMenus() {
    // Wipe them out and start over
    if(bookMenu.get_children().size() != 0) {
        delete bookMenu.get_children()[0];
    }
    if(menuMenu.get_children().size() != 0) {
        delete menuMenu.get_children()[0];
    }

    // Populate bookMenu
    Gtk::HBox *outer = Gtk::manage(new Gtk::HBox);
    bookMenu.add(*outer);

    //TODO: Disgusting code duplication. Fix with strategy pattern? Or loop?

    Gtk::ScrolledWindow *swl = Gtk::manage(new Gtk::ScrolledWindow);
    Gtk::VBox *boxl = Gtk::manage(new Gtk::VBox);
    outer->add(*swl);
    swl->add(*boxl);
    swl->set_propagate_natural_width(true);
    swl->set_min_content_height(300);
    for(std::string bookName : reader->getAllBooks()) {
        Gtk::Button *item = Gtk::manage(new Gtk::Button(bookName));
        item->set_relief(Gtk::ReliefStyle::RELIEF_NONE);
        item->signal_clicked().connect([bookName, this]() {
            bookMenu.popdown();
            reader->setChapter(1);
            reader->setBook(bookName);
            updateButtons();
            updateMenus();
            showText();
        });
        boxl->add(*item);
    }

    Gtk::ScrolledWindow *swr = Gtk::manage(new Gtk::ScrolledWindow);
    Gtk::VBox *boxr = Gtk::manage(new Gtk::VBox);
    outer->add(*swr);
    swr->add(*boxr);
    swr->set_propagate_natural_width(true);
    swr->set_min_content_height(300);
    for(unsigned int chapter = 1; chapter <= reader->getChapterMax(); chapter++) {
        Gtk::Button *item = Gtk::manage(new Gtk::Button(std::to_string(chapter)));
        item->set_relief(Gtk::ReliefStyle::RELIEF_NONE);
        item->signal_clicked().connect([chapter, this]() {
            bookMenu.popdown();
            reader->setChapter(chapter);
            updateButtons();
            showText();
        });
        boxr->add(*item);
    }

    bool *hasAllocated = new bool(false);
    outer->signal_size_allocate().connect([this, swl, swr, hasAllocated](Gdk::Rectangle rec) {
        if(! *hasAllocated) {
            // First figure out the books
            auto allBooks = reader->getAllBooks();
            int position = std::find(allBooks.begin(), allBooks.end(), reader->getBookFull()) - allBooks.begin();
            swl->get_vadjustment()->set_value(swl->get_vadjustment()->get_upper() * position / allBooks.size());
            swr->get_vadjustment()->set_value(swr->get_vadjustment()->get_upper() * (reader->getChapter() - 1) / reader->getChapterMax());
        }
        *hasAllocated = true;
    });

    bookMenu.show_all_children();
    book.signal_pressed().connect([this, hasAllocated, swl, swr]() {
        *hasAllocated = false;
    });

    // Populate menuMenu
    Gtk::VBox *outerBox = Gtk::manage(new Gtk::VBox);
    menuMenu.add(*outerBox);

    Gtk::VBox *versionBox = Gtk::manage(new Gtk::VBox);
    Gtk::Label *scaleLabel = Gtk::manage(new Gtk::Label);
    scaleLabel->set_text("Text Size");
    versionBox->add(*scaleLabel);
    Gtk::Scale *scale = Gtk::manage(new Gtk::Scale);
    scale->set_range(8000, 20000);
    scale->set_value(libbible::settingsReadInt("fontsize"));
    scale->set_draw_value(false);
    scale->signal_value_changed().connect([scale, this]() {
        libbible::settingsWriteInt("fontsize", (int) scale->get_value());
        this->reader->refresh();
    });
    versionBox->add(*scale);

    vector<string> versions = libbible::getModuleNames();
    if(versions.size() > 8) {
        Gtk::ScrolledWindow *sw = Gtk::manage(new Gtk::ScrolledWindow);
        sw->set_propagate_natural_width(true);
        sw->set_min_content_height(300);
        sw->add(*versionBox);
        outerBox->add(*sw);
    } else {
        outerBox->add(*versionBox);
    }
    for(string version : versions) {
        Gtk::Button *item = Gtk::manage(new Gtk::Button(version));
        item->set_relief(Gtk::ReliefStyle::RELIEF_NONE);
        item->signal_clicked().connect([version, this]() {
            menuMenu.popdown();
            libbible::settingsWrite("biblereader::currMod", version);
            updateButtons();
            updateMenus();
            showText();
        });
        Gtk::Button *delVersion = Gtk::manage(new Gtk::Button);
        delVersion->set_image_from_icon_name("list-remove-symbolic");
        delVersion->set_relief(Gtk::ReliefStyle::RELIEF_NONE);
        delVersion->signal_clicked().connect([version, this]() {
            menuMenu.popdown();
            libbible::uninstallMod(version);
            updateButtons();
            updateMenus();
        });
        item->set_halign(Gtk::ALIGN_FILL);
        delVersion->set_halign(Gtk::ALIGN_END);
        Gtk::HBox *hbox = Gtk::manage(new Gtk::HBox);
        hbox->add(*item);
        hbox->add(*delVersion);
        versionBox->add(*hbox);
        item->set_sensitive(version != libbible::settingsRead("biblereader::currMod"));
    }
    Gtk::Button *add = Gtk::manage(new Gtk::Button);
    add->set_image_from_icon_name("list-add-symbolic");
    add->signal_clicked().connect([this]() {
        menuMenu.popdown();
        showMods();
        updateMenus();
        updateButtons();
    });
    versionBox->add(*add);

    menuMenu.show_all_children();
}

void Header::showMods() {
    window->remove();
    window->add(*this->mods);
    window->show_all_children();
}

void Header::showText() {
    window->remove();
    window->add(*this->reader);
    window->show_all_children();
}