use fmt;
use os;
use fs;
use io;
use strings;
use unix;
use unix::poll;
use uxn;

def MAX_CONSOLE_INPUT = 0x1000;

export fn main() void = {
	let run = true;
	if(len(os::args) < 2){
		fmt::printf("usage: %s file.rom [args..]\n")!;
		return;
	};
	let path = os::args[1];

	//Setting up pollfds for unix::poll
	const consolefd: []unix::poll::pollfd = [unix::poll::pollfd {
		fd = os::stdin_file,
		events = unix::poll::event::POLLIN,
		revents = 0,
	} ];
	let state: *uxn::uxn = uxn::uxn_init(path)!;
	uxn::uxn_reset(state);


	for (run) {
		if(state.running){
			// fmt::printf("Next Step!\n")!;
			uxn::uxn_step(state)!;
			yield;
		}else{
			 if(state.console_vector != 0){
				 // fmt::printf("Console!\n")!;
			 	let args = os::args[2..];
			 	let i: u8 = 0;
			 	let argcount = len(args): u8;
			 	for (let arg .. args){
			 		// fmt::println("Console input args")!;
			 		for(let char: u8 .. strings::toutf8(arg)){
			 			// fmt::printfln("Console input arg char: {:x}", char)!;
			 			match (uxn::console_input(char,2,state)) {
			 					case done =>
			 						yield done;
			 					case let val: u8  =>
			 						fmt::fatalf("Unhandled Opcode: {:x}", val);
			 				};
			 		};
			 		let ctype: u8 = if(i == (argcount - 1)){
			 			yield 4;
			 		} else {
			 			yield 3;
			 		};
			 		match (uxn::console_input('\n',ctype,state)) {
			 				case done =>
			 					yield done;
			 				case let val: u8  =>
			 					fmt::fatalf("Unhandled Opcode: {:x}", val);
			 			};
			 		i+=1; //TODO using i here seems inelegant
			 	};
		 		const pollr = unix::poll::poll(consolefd, unix::poll::NONBLOCK);
				if(pollr > 0){
					// fmt::println("Input!")!;
					let buf: [MAX_CONSOLE_INPUT]u8 = [0...]; 
			 		io::read(os::stdin_file, buf)!;
					for( let b .. buf ){
						// fmt::printfln("Input: {}",buf[0])!;
			 			match (uxn::console_input(b,1,state)) {
		 					case done =>
		 						yield done;
		 					case let val: u8  =>
		 						fmt::fatalf("Unhandled Opcode: {:x}", val);
			 				};
						// uxn::console_input(b,1,state);
					};
				};
					
			 };
		};

		if(state.dev[0x0f] != 0) run = false;


	};
};