import std.stdio: writeln;
import std.exception;

import raylib;
import grimoire;
import utils.log;
import std.string : toStringz;
import std.format;
import std.conv : to;
import core.time;
import toki.symbols;
import world;


extern(C) __gshared string[] rt_options = [ "gcopt=initReserve:128 minPoolSize:256 parallel:2 profile:1" ];

int main(string[] args) {
	try {
        worldContents = new WorldObjectList;
        InitWindow(800,600,"Unnamed project");
        log(LogLevel.INFOHIGH, "Window Initialized...");
        Screen.x = Screen.y = 0;
        Screen.width = Screen.px_width = 800;
        Screen.height = Screen.px_height = 600;
        log(LogLevel.INFOHIGH, "Readying the engine...");
        GrEngine engine = new GrEngine();
        auto grstd = grLoadStdLibrary();
        auto grloglib = getLogLibrary();
        engine.addLibrary(grstd);
        engine.addLibrary(grloglib);
        log(LogLevel.INFOHIGH, "Readying the compiler...");
        GrCompiler compiler = new GrCompiler();
        compiler.addLibrary(grstd);
        compiler.addLibrary(grloglib);
        compiler.addFile("./assets/scripts/dummy.gr");
        log(LogLevel.INFOHIGH, "Compiling Scripts...");
        auto bytecode = compiler.compile(GrOption.symbols);
        if(! bytecode) {
            throw new Exception(compiler.getError().prettify(GrLocale.en_US));
        }
        log(LogLevel.INFOHIGH, "Booting Scripts...");
        engine.load(bytecode);
        log(LogLevel.INFOHIGH, "Go Hot Dog, Go...");
        engine.process();

        auto reference = MonoTime.currTime();
        auto deltaTime = 1f/60f;

        while(! WindowShouldClose()) {
            if(engine.isPanicking()) {
                throw new Exception(engine.panicMessage());
            }
            log(LogLevel.INFOLOW, format("Frame begin %fs...", deltaTime));
            log(LogLevel.INFOLOW, "Processing inputs...");
            log(LogLevel.INFOLOW, "Processing coros...");
            engine.process();
            log(LogLevel.INFOLOW, "Processing changes...");
            
            log(LogLevel.INFOLOW, "Render start...");
            BeginDrawing();{
                ClearBackground(Colors.WHITE);

                foreach (obj; worldContents)
                {
                    obj.render(deltaTime);
                }

                DrawFPS(0,0);
                auto pos = GetMousePosition();
                DrawText(toStringz(format("%f, %f", pos.x, pos.y)), 0, 24, 20, Colors.GREEN);
            }EndDrawing();
            auto new_reference = MonoTime.currTime();
            deltaTime = (new_reference - reference).total!("hnsecs")/10_000_000.0;
            reference = new_reference;
        }

        CloseWindow();
        return 0;
	}
	catch(Exception e) {
		log(LogLevel.ERROR, e.msg);
		foreach (trace; e.info)
			log(LogLevel.ERROR, format("at: %s", trace));
	}
    return 1;
}