#include "settings-window.hpp"
#include "settings-manager.hpp"

#include <linux/videodev2.h>
#include <iostream>
#include <filesystem>
#include <stdexcept>
#include <fcntl.h>
#include <libv4l2.h>
#include <sys/dir.h>

using namespace std;

SettingsWindow::SettingsWindow(OBSManager* obs)
: mBox(Gtk::Orientation::ORIENTATION_VERTICAL, 2),
  mBoxSettings(Gtk::Orientation::ORIENTATION_VERTICAL, 2),
  mBoxPluginDir(Gtk::Orientation::ORIENTATION_HORIZONTAL, 2),
  mLabelPluginDir("Plugin Dir: "),
  mBoxOutputDir(Gtk::Orientation::ORIENTATION_HORIZONTAL, 2),
  mLabelOutputDir("Saved Files Dir: "),
  mCheckButtonDesktop("Enable desktop recording"),
  mBoxWebcam(Gtk::Orientation::ORIENTATION_VERTICAL, 2),
  mCheckButtonWebcam("Enable webcam recording"),
  mCheckButtonAudio("Enable audio recording"),
  mButtonClose("Close"),
  mButtonSave("Save")
{
    set_title("Settings");
    set_default_size(640, 480);
    set_border_width(10);
    set_modal(true);
    set_type_hint(Gdk::WindowTypeHint::WINDOW_TYPE_HINT_DIALOG);
    
    settings = new SettingsManager();
    
    signal_key_press_event().connect(
        sigc::mem_fun(*this, &SettingsWindow::onKeyPressed));
    
    mButtonClose.signal_clicked().connect(
        sigc::mem_fun(*this, &SettingsWindow::onClosePressed));
    mButtonSave.signal_clicked().connect(
        sigc::mem_fun(*this, &SettingsWindow::onSavePressed));
    
    mBoxSettings.set_border_width(10);
    
    mEntryPluginDir.set_hexpand(true);
    mEntryPluginDir.set_text(settings->GetWithDefault(SETTINGS_KEY_PLUGIN_DIR, SETTINGS_DEFAULT_PLUGIN_DIR));
    
    mBoxPluginDir.set_border_width(10);
    mBoxPluginDir.add(mLabelPluginDir);
    mBoxPluginDir.add(mEntryPluginDir);
    
    mEntryOutputDir.set_hexpand(true);
    mEntryOutputDir.set_text(settings->GetWithDefault(SETTINGS_KEY_OUTPUT_DIR, std::filesystem::current_path()));
    
    mBoxOutputDir.set_border_width(10);
    mBoxOutputDir.add(mLabelOutputDir);
    mBoxOutputDir.add(mEntryOutputDir);
    
    mFrameDesktop.set_label("Desktop");
    mFrameDesktop.set_border_width(10);
    mCheckButtonDesktop.set_border_width(10);
    mCheckButtonDesktop.set_active(settings->GetBoolWithDefault(SETTINGS_KEY_SCREEN_ENABLED, true));
    mFrameDesktop.add(mCheckButtonDesktop);
    
    mComboBoxVideoDevice.set_border_width(10);
    mFrameWebcam.set_label("Webcam");
    mFrameWebcam.set_border_width(10);
    mBoxWebcam.set_border_width(10);
    mCheckButtonWebcam.set_active(settings->GetBoolWithDefault(SETTINGS_KEY_WEBCAM_ENABLED, true));
    mBoxWebcam.add(mCheckButtonWebcam);
    mBoxWebcam.add(mComboBoxVideoDevice);
    mFrameWebcam.add(mBoxWebcam);
    
    mFrameAudio.set_label("Microphone");
    mFrameAudio.set_border_width(10);
    mCheckButtonAudio.set_border_width(10);
    mCheckButtonAudio.set_active(settings->GetBoolWithDefault(SETTINGS_KEY_AUDIO_ENABLED, true));
    mFrameAudio.add(mCheckButtonAudio);
    
    mBoxSettings.add(mBoxPluginDir);
    mBoxSettings.add(mBoxOutputDir);
    mBoxSettings.add(mFrameDesktop);
    mBoxSettings.add(mFrameWebcam);
    mBoxSettings.add(mFrameAudio);
    
    mFrameSettings.set_label("Settings");
    mFrameSettings.set_border_width(10);
    mFrameSettings.add(mBoxSettings);
    
    mActionBar.pack_end(mButtonSave);
    mActionBar.pack_end(mButtonClose);
    
    mBox.add(mFrameSettings);
    mBox.add(mActionBar);
    
    mBox.show_all();
    add(mBox);
}

SettingsWindow::~SettingsWindow()
{
}

void SettingsWindow::on_show()
{
    Gtk::Window::on_show();
    populateVideoDevices();
}

bool SettingsWindow::onKeyPressed(GdkEventKey *event)
{
    if (event->keyval == GDK_KEY_Escape)
    {
        close();
        return true;
    }
    
    return false;
}

void SettingsWindow::onClosePressed()
{
    close();
}

void SettingsWindow::onSavePressed()
{
    settings->Update(SETTINGS_KEY_PLUGIN_DIR, mEntryPluginDir.get_text());
    settings->Update(SETTINGS_KEY_OUTPUT_DIR, mEntryOutputDir.get_text());
    settings->UpdateBool(SETTINGS_KEY_SCREEN_ENABLED, mCheckButtonDesktop.get_active());
    settings->UpdateBool(SETTINGS_KEY_WEBCAM_ENABLED, mCheckButtonWebcam.get_active());
    settings->Update(SETTINGS_KEY_VIDEO_DEVICE_ID, mComboBoxVideoDevice.get_active_id());
    settings->UpdateBool(SETTINGS_KEY_AUDIO_ENABLED, mCheckButtonAudio.get_active());
    settings->SaveAll();
    close();
}

void SettingsWindow::populateVideoDevices()
{
    v4l2_capability cap;
    dirent *dp;
    
    auto dirp = opendir("/sys/class/video4linux");
    if (!dirp)
        throw runtime_error("Failed to get video devices");
    
    while ((dp = readdir(dirp)) != nullptr)
    {
        int fd;
        if (dp->d_type == DT_DIR)
            continue;
        
        auto name = string(dp->d_name);
        if (name.find("video") == string::npos)
            continue;
        
        auto device = "/dev/" + name;
        
        if ((fd = v4l2_open(device.c_str(), O_RDWR | O_NONBLOCK)) == -1)
        {
            cout << "Failed to open device: " << device << endl;
            continue;
        }
        
        if (v4l2_ioctl(fd, VIDIOC_QUERYCAP, &cap) == -1)
        {
            cout << "Failed to query device: " << device << endl;
            v4l2_close(fd);
            continue;
        }
        
        auto n = string(reinterpret_cast<char*>(cap.card));
        n += " (" + device + ")";
        
        mComboBoxVideoDevice.append(device, n);
        if (settings->Get(SETTINGS_KEY_VIDEO_DEVICE_ID) == device)
            mComboBoxVideoDevice.set_active_id(device);
        
        v4l2_close(fd);
    }
}