#include "Environment.h"

#include "utils/Utils.h"

#ifdef __ANDROID__
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#else
#include <GL/gl.h>
#endif

#ifdef EMSCRIPTEN
#include <emscripten/html5.h>
#endif

namespace FRG {



int Environment::windowHeaderHeight = 0;
int Environment::width = CONST_DEFAULT_WIDTH;
int Environment::height = CONST_DEFAULT_HEIGHT;
float Environment::zoom = DEFAULT_ZOOM;

bool Environment::enableLogging = false;
//bool Environment::enableLogging = true;

SDL_Window* Environment::window = nullptr;

#ifdef EMSCRIPTEN
bool Environment::isFullscreen = false;
#else
bool Environment::isFullscreen = true;
#endif

bool Environment::isHighDPIEnabled = false;
int Environment::customDpiScale = 1;

bool Environment::showMouse = false;

bool Environment::exitGameLoop = false;

Eigen::Matrix3f Environment::inverseShipMatrix = Eigen::Matrix3f::Identity();


bool Environment::tapDownHold = false;
Eigen::Vector2f Environment::tapDownStartPos = { 0, 0 };
Eigen::Vector2f Environment::tapDownCurrentPos = { 0, 0 };

const float Environment::CONST_Z_NEAR = 0.1f;
const float Environment::CONST_Z_FAR = 100.f;

float Environment::projectionWidth = 1280.0f;
float Environment::projectionHeight = 720.0f;

void Environment::computeProjectionDimensions()
{
	if (width <= 0 || height <= 0) return;

	const float refShortSide = 720.0f;
	float aspect = (float)width / (float)height;

	if (width >= height) {
		// Landscape: fix height to 720, scale width to preserve aspect
		projectionHeight = refShortSide;
		projectionWidth = refShortSide * aspect;
	} else {
		// Portrait: fix width to 720, scale height to preserve aspect
		projectionWidth = refShortSide;
		projectionHeight = refShortSide / aspect;
	}
}

void Environment::setFullscreen(bool enable) {
#ifdef EMSCRIPTEN
	if (enable) {
		EmscriptenFullscreenStrategy strategy{};
		strategy.scaleMode = EMSCRIPTEN_FULLSCREEN_SCALE_STRETCH;
		strategy.canvasResolutionScaleMode = EMSCRIPTEN_FULLSCREEN_CANVAS_SCALE_STDDEF;
		strategy.filteringMode = EMSCRIPTEN_FULLSCREEN_FILTERING_DEFAULT;
		emscripten_request_fullscreen_strategy("#canvas", EM_TRUE, &strategy);
	} else {
		emscripten_exit_fullscreen();
	}
	// isFullscreen is updated by onFullscreenChanged once the browser confirms —
	// the request above is deferred/async and can fail silently (e.g. denied).
#else
	if (window) {
		SDL_SetWindowFullscreen(window, enable ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
	}
	isFullscreen = enable;
#endif
}

} // namespace FRG