#include <psemek/app/ui_scene.hpp>

#include <psemek/log/log.hpp>

namespace psemek::app
{

	ui_scene::ui_scene(ui::controller & controller)
		: controller_(controller)
	{}

	void ui_scene::on_scene_enter(app * parent)
	{
		scene_base::on_scene_enter(parent);
		controller_.set_root(ui_);
		update_clock_.restart();
	}

	void ui_scene::on_scene_exit()
	{
		scene_base::on_scene_exit();
		controller_.set_root(nullptr);
	}

	void ui_scene::on_resize(int width, int height)
	{
		scene_base::on_resize(width, height);
		controller_.reshape({{{0.f, width}, {0.f, height}}});
	}

	void ui_scene::on_mouse_move(int x, int y, int dx, int dy)
	{
		scene_base::on_mouse_move(x, y, dx, dy);
		controller_.event(ui::mouse_move{{x, y}});
	}

	void ui_scene::on_mouse_wheel(int delta)
	{
		scene_base::on_mouse_wheel(delta);
		controller_.event(ui::mouse_wheel{delta});
	}

	void ui_scene::on_left_button_down()
	{
		scene_base::on_left_button_down();
		controller_.event(ui::mouse_click{ui::mouse_button::left, true});
	}

	void ui_scene::on_left_button_up()
	{
		scene_base::on_left_button_up();
		controller_.event(ui::mouse_click{ui::mouse_button::left, false});
	}

	void ui_scene::on_middle_button_down()
	{
		scene_base::on_left_button_down();
		controller_.event(ui::mouse_click{ui::mouse_button::middle, true});
	}

	void ui_scene::on_middle_button_up()
	{
		scene_base::on_left_button_down();
		controller_.event(ui::mouse_click{ui::mouse_button::middle, false});
	}

	void ui_scene::on_right_button_down()
	{
		scene_base::on_right_button_down();
		controller_.event(ui::mouse_click{ui::mouse_button::right, true});
	}

	void ui_scene::on_right_button_up()
	{
		scene_base::on_right_button_down();
		controller_.event(ui::mouse_click{ui::mouse_button::right, false});
	}

	void ui_scene::on_key_down(SDL_Keycode key)
	{
		scene_base::on_key_down(key);
		controller_.event(ui::key_press{key, true});
	}

	void ui_scene::on_key_up(SDL_Keycode key)
	{
		scene_base::on_key_up(key);
		controller_.event(ui::key_press{key, false});
	}

	void ui_scene::on_text_input(std::string_view text)
	{
		scene_base::on_text_input(text);
		controller_.event(ui::text_input{text});
	}

	void ui_scene::update()
	{
		controller_.update(update_clock_.restart().count());
		std::size_t events = controller_.loop()->pump(max_events_per_frame_);
		if (max_events_per_frame_ && events == *max_events_per_frame_)
			log::warning() << "UI event loop had more than " << *max_events_per_frame_ << " events, delaying others";
	}

	void ui_scene::present()
	{
		gfx::render_target rt;
		rt.viewport = {{{0, width()}, {0, height()}}};
		rt.framebuffer = &gfx::framebuffer::null();
		rt.draw_buffer = gl::BACK_LEFT;
		controller_.render(rt);
	}

	void ui_scene::set_ui(std::shared_ptr<ui::element> ui)
	{
		ui_ = std::move(ui);
		if (active())
			controller_.set_root(ui_);
	}

}