#include <SDL2/SDL_image.h>
#include <memory>
#include <iostream>
#include "Sprite.hpp"
#include "GameRenderer.hpp"

GameRenderer::GameRenderer(const std::string &title, const int screen_width, const int screen_height)
	: title(title), screen_width(screen_width), screen_height(screen_height)
{
	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
		std::cerr << "Unable to initialize SDL" << std::endl;
		exit(EXIT_FAILURE);
	}

	SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");

	window = SDL_CreateWindow(
		title.c_str(),
		SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
		screen_width, screen_height,
		SDL_WINDOW_SHOWN
	);

	if (!window) {
		std::cerr << "Could not create window" << std::endl;
		exit(EXIT_FAILURE);
	}

	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

	if (!renderer) {
		std::cerr << "Could not create renderer" << std::endl;
		exit(EXIT_FAILURE);
	}
}

GameRenderer::~GameRenderer()
{
	SDL_DestroyRenderer(renderer);
	SDL_DestroyWindow(window);
}

std::unique_ptr<Sprite> GameRenderer::load_sprite(const std::string &file, const int width, const int height) const
{
	return std::make_unique<Sprite>(Sprite({ renderer, file, width, height }));
}

void GameRenderer::draw_sprite(const Sprite sprite, const int x, const int y) const
{
	const SDL_Rect rect = { .x = x, .y = y, .w = sprite.width, .h = sprite.height };
	SDL_RenderCopy(renderer, sprite.texture, nullptr, &rect);
}

void GameRenderer::draw_sprite_rotated(const Sprite sprite, const int x, const int y, const double angle) const
{
	const SDL_Rect rect = { .x = x, .y = y, .w = sprite.width, .h = sprite.height };
	SDL_RenderCopyEx(renderer, sprite.texture, nullptr, &rect, angle, nullptr, SDL_FLIP_NONE);
}

void GameRenderer::clear_screen(const uint8_t r, const uint8_t g, const uint8_t b, const uint8_t a) const
{
	SDL_SetRenderDrawColor(renderer, r, g, b, a);
	SDL_RenderClear(renderer);
}

void GameRenderer::flush() const
{
	SDL_RenderPresent(renderer);
}

void GameRenderer::redraw() const
{
	SDL_Event event;
	event.type = SDL_WINDOWEVENT;
	event.window.event = SDL_WINDOWEVENT_EXPOSED;
	event.window.windowID = SDL_GetWindowID(window);
	SDL_PushEvent(&event);
}