//
// Application.cpp
// libscgui
//
// Created by Bob Polis at 2020-10-23
// Copyright (c) 2020 SwiftCoder. All rights reserved.
//

#include "Application.hpp"
#include "Window.hpp"
#include <algorithm>

using namespace sc::gui;

Application Application::app;

void Application::run() {
    bool quit {false};
    while (!quit) {
        SDL_Event event;
        if (SDL_PollEvent(&event)) {
            switch (event.type) {
                case SDL_QUIT:
                    quit = true;
                    break;
                case SDL_WINDOWEVENT:
                    quit = Window::handle_window_event(event);
                    break;
                default:
                    quit = handle_event(event);
            }
        }
        for (const Window& window : Window::windows()) {
            window.update();
        }
        for (RunLoopAction action : _actions) {
            action();
        }
    }
}

void Application::add_event_handler(EventHandler handler, SDL_EventType event) {
    auto it = _event_handlers.find(event);
    if (it != _event_handlers.end()) {
        it->second.push_back(handler);
    } else {
        std::vector<EventHandler> handlers {handler};
        _event_handlers.emplace(event, handlers);
    }
}

bool Application::handle_event(const SDL_Event& event) {
    bool quit {false};
    auto it  = _event_handlers.find(static_cast<SDL_EventType>(event.type));
    if (it != _event_handlers.end()) {
        for (EventHandler handler : it->second) {
            quit |= handler(event);
        }
    }
    return quit;
}

void Application::add_run_loop_action(RunLoopAction action) {
    _actions.push_back(action);
}

void Application::remove_run_loop_action(RunLoopAction action) {
    _actions.erase(std::remove(_actions.begin(), _actions.end(), action), _actions.end());
}