#include "widgets/volumeWidget.hpp"

#include <cmath>
#include <iostream>
#include <regex>
#include <sigc++/functors/mem_fun.h>

#include "helpers/command.hpp"

#include "giomm/applicationcommandline.h"

VolumeWidget::VolumeWidget() : Gtk::Box(Gtk::Orientation::HORIZONTAL) {
    set_valign(Gtk::Align::CENTER);
    set_halign(Gtk::Align::CENTER);

    label.set_halign(Gtk::Align::CENTER);
    label.set_valign(Gtk::Align::CENTER);
    label.set_text("Vol");

    append(label);

    click = Gtk::GestureClick::create();
    click->set_button(GDK_BUTTON_PRIMARY);
    click->signal_released().connect([this](int, double, double) {
        try {
            (void)CommandHelper::exec(
                "wpctl set-mute @DEFAULT_SINK@ toggle");
        } catch (const std::exception &ex) {
            std::cerr << "[VolumeWidget] failed to toggle mute: " << ex.what()
                      << std::endl;
        }
        this->update();
    });

    add_controller(click);
    update();

    this->timeoutConn = Glib::signal_timeout().connect(
        sigc::mem_fun(*this, &VolumeWidget::on_timeout), 100);
}

VolumeWidget::~VolumeWidget() {
    if (this->timeoutConn.connected())
        this->timeoutConn.disconnect();
}

void VolumeWidget::update() {
    try {
        const std::string out = CommandHelper::exec("wpctl get-volume @DEFAULT_SINK@");

        std::smatch m;
        std::regex r_percent(R"((\d+(?:\.\d+)?)%)");
        std::regex r_number(R"((\d+(?:\.\d+)?))");

        std::string text = out;
        int percent      = -1;

        if (std::regex_search(text, m, r_percent)) {
            percent = static_cast<int>(std::round(std::stod(m[1].str())));
        } else if (std::regex_search(text, m, r_number)) {
            const double v = std::stod(m[1].str());
            if (v <= 1.0)
                percent = static_cast<int>(std::round(v * 100.0));
            else
                percent = static_cast<int>(std::round(v));
        }

        if (percent >= 0) {
            label.set_text(std::to_string(percent) + "%");
        } else {
            auto pos = text.find_first_not_of(" \t\n\r");
            if (pos != std::string::npos) {
                auto end = text.find_last_not_of(" \t\n\r");
                label.set_text(text.substr(pos, end - pos + 1));
            } else {
                label.set_text("?");
            }
        }
    } catch (const std::exception &ex) {
        std::cerr << "[VolumeWidget] failed to read volume: " << ex.what()
                  << std::endl;
        label.set_text("N/A");
    }
}

bool VolumeWidget::on_timeout() {
    update();

    return true; // keep timeout active
}