package kernel.peripherals;

import kernel.peripherals.Modem;
import kernel.peripherals.Screen;

using lua.Table;
using Lambda;
using tink.CoreApi;

/**
	Class responseable for retrieving peripherals.
**/
class Peripheral {
	/**
		Depends on: KernelEvents
	**/
	public static var instance:Peripheral;

	@:allow(kernel.Init)
	private function new() {
	}

	public function getAllAddresses(): Array<String> {
		return cc.Peripheral.getNames().toArray();
	}

	public function isPresent(addr: String): Bool {
		return cc.Peripheral.isPresent(addr);
	}

	public function getTypes(addr: String): Array<String> {
		if (!cc.Peripheral.isPresent(addr)) {
			return [];
		}

		return cc.Peripheral.getType(addr).toArray();
	}

	private function findAddrByType(type: String): Array<String> {
		return getAllAddresses().filter(addr -> getTypes(addr).contains(type));
	}
	
	private function safeGetAddr(addr: String, type: String): Null<String> {
		if (!isPresent(addr)) {
			return null;
		}

		var types = getTypes(addr);
		if (!types.contains(type)) {
			return null;
		}

		return addr;
	}

	public function inspect(addr: String): Null<{ types: Array<String>, methods: Array<String>}> {
		if (!isPresent(addr)) {
			return null;
		}

		var types = getTypes(addr);
		var methodsMap = cc.Peripheral.getMethods(addr).toArray();
		var methods: Array<String> = [];
		
		for (method in methodsMap) {
			methods.push(method);
		}

		return {
			types: types,
			methods: methods
		};
	}

	public function getScreen(addr: String): Null<Screen> {
		var addr = safeGetAddr(addr, Screen.TYPE_NAME);
		if (addr == null) return null;
		return new Screen(addr);
	}


	public function getAllScreens(): Array<Screen> {
		return [ for (addr in findAddrByType(Screen.TYPE_NAME)) new Screen(addr)];
	}

	public function getModem(addr: String): Null<Modem> {
		var addr = safeGetAddr(addr, Modem.TYPE_NAME);
		if (addr == null) return null;
		return new Modem(addr);
	}

	public function getAllModems(): Array<Modem> {
		return [ for (addr in findAddrByType(Modem.TYPE_NAME)) new Modem(addr)];
	}

	public function getDrive(addr: String): Null<Drive> {
		var addr = safeGetAddr(addr, Drive.TYPE_NAME);
		if (addr == null) return null;
		return new Drive(addr);
	}

	public function getAllDrives(): Array<Drive> {
		return [ for (addr in findAddrByType(Drive.TYPE_NAME)) new Drive(addr)];
	}

	public function getRedstone(side: String): Redstone {
		// TODO: maybe handle restone differently to not duplicate event listeners
		return new Redstone(side);
	}

	public function getPrinter(addr: String):Null<Printer> {
		var addr = safeGetAddr(addr, Printer.TYPE_NAME);
		if (addr == null) return null;
		return new Printer(addr);
	}

	public function getAllPrinters(): Array<Printer> {
		return [ for (addr in findAddrByType(Printer.TYPE_NAME)) new Printer(addr)];
	}

	public function getEnergyStorage(addr: String): Null<EnergyStorage> {
		var addr = safeGetAddr(addr, EnergyStorage.TYPE_NAME);
		if (addr == null) return null;
		return new EnergyStorage(addr);
	}

	public function getAllEnergyStorages(): Array<EnergyStorage> {
		return [ for (addr in findAddrByType(EnergyStorage.TYPE_NAME)) new EnergyStorage(addr)];
	}
}