/*
 * DISTRHO CVCRack Plugin
 * Copyright (C) 2021 Filipe Coelho <falktx@falktx.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any purpose with
 * or without fee is hereby granted, provided that the above copyright notice and this
 * permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
 * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <app/common.hpp>
#include <app/Scene.hpp>
#include <context.hpp>
#include <engine/Engine.hpp>
#include <patch.hpp>
#include <ui/common.hpp>
#include <window/Window.hpp>

#include "DistrhoUI.hpp"
#include "ResizeHandle.hpp"

GLFWAPI const char* glfwGetClipboardString(GLFWwindow* window) { return nullptr; }
GLFWAPI void glfwSetClipboardString(GLFWwindow* window, const char*) {}
GLFWAPI const char* glfwGetKeyName(int key, int scancode) { return nullptr; }
GLFWAPI int glfwGetKeyScancode(int key) { return 0; }

namespace rack {
namespace window {
    DISTRHO_NAMESPACE::UI* lastUI = nullptr;

    void mouseButtonCallback(Window* win, int button, int action, int mods);
    void cursorPosCallback(Window* win, double xpos, double ypos);
    void scrollCallback(Window* win, double x, double y);
}
}

START_NAMESPACE_DISTRHO

// -----------------------------------------------------------------------------------------------------------

struct Initializer2 {
    Initializer2()
    {
        using namespace rack;

    }

    ~Initializer2()
    {
        using namespace rack;

    }
};

static const Initializer2& getInitializer2Instance()
{
    static const Initializer2 init;
    return init;
}

class CVCRackUI : public UI
{
    ResizeHandle fResizeHandle;
public:
    CVCRackUI()
        : UI(1280, 720),
          fResizeHandle(this)
    {
        using namespace rack;

        // Initialize context
        INFO("Initializing context");
        window::lastUI = this;
        contextSet(new Context);
        APP->engine = new engine::Engine;
        APP->history = new history::State;
        APP->event = new widget::EventState;
        APP->scene = new app::Scene;
        APP->event->rootWidget = APP->scene;
        APP->patch = new patch::Manager;
        /*if (!settings::headless)*/ {
            APP->window = new window::Window;
        }
        window::lastUI = nullptr;

    	APP->engine->startFallbackThread();
    }

    ~CVCRackUI() override
    {
        using namespace rack;

	    delete APP;
	    contextSet(NULL);
    }

    void onDisplay() override
    {
		APP->window->step();
    }

    void uiIdle() override
    {
        repaint();
    }

protected:
   /* --------------------------------------------------------------------------------------------------------
    * DSP/Plugin Callbacks */

   /**
      A parameter has changed on the plugin side.
      This is called by the host to inform the UI about parameter changes.
    */
    void parameterChanged(uint32_t index, float value) override
    {
    }

    // -------------------------------------------------------------------------------------------------------

    bool onMouse(const MouseEvent& ev) override
    {
        int button;
        int mods = 0;
        int action = ev.press;

        if (ev.mod & kModifierControl)
            mods |= GLFW_MOD_CONTROL;
        if (ev.mod & kModifierShift)
            mods |= GLFW_MOD_SHIFT;
        if (ev.mod & kModifierAlt)
            mods |= GLFW_MOD_ALT;

        switch (ev.button)
        {
        case 0:
            button = GLFW_MOUSE_BUTTON_MIDDLE;
            break;
        case 1:
            button = GLFW_MOUSE_BUTTON_LEFT;
            break;
        case 2:
            button = GLFW_MOUSE_BUTTON_RIGHT;
            break;
        default:
            button = 0;
            break;
        }

        mouseButtonCallback(APP->window, button, action, mods);
        return true;
    }

    bool onMotion(const MotionEvent& ev) override
    {
        cursorPosCallback(APP->window, ev.pos.getX(), ev.pos.getY());
        return true;
    }

    bool onScroll(const ScrollEvent& ev) override
    {
        scrollCallback(APP->window, ev.delta.getX(), ev.delta.getY());
        return true;
    }

    #if 0
    void onResize(const ResizeEvent& ev) override
    {
        UI::onResize(ev);
        // APP->window->setSize(rack::math::Vec(ev.size.getWidth(), ev.size.getHeight()));
    }
    #endif

    // TODO uiFocus

private:
   /**
      Set our UI class as non-copyable and add a leak detector just in case.
    */
    DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CVCRackUI)
};

/* ------------------------------------------------------------------------------------------------------------
 * UI entry point, called by DPF to create a new UI instance. */

UI* createUI()
{
    getInitializer2Instance();
    return new CVCRackUI();
}

// -----------------------------------------------------------------------------------------------------------

END_NAMESPACE_DISTRHO