const c = document.querySelector(".console");
const ps1 = "[fr@website ~]$ ";
const motd = "Welcome to my website!<br>You can use `help` for more informations :)";
let line = "";

function exec(command) {
	switch (command[0]) {
		case "help":
			line = "help<br>author<br>contact<br>clear<br>echo";
			break;
		case "author":
			line = "Filip Rojek, 2023";
			break;
		case "contact":
			line =
				"Filip Rojek &lt<a href='mailto: &#102;&#105;&#108;&#105;&#112;&#064;&#102;&#105;&#108;&#105;&#112;&#114;&#111;&#106;&#101;&#107;&#046;&#099;&#122;'>&#102;&#105;&#108;&#105;&#112;&#064;&#102;&#105;&#108;&#105;&#112;&#114;&#111;&#106;&#101;&#107;&#046;&#099;&#122;</a>&gt<br>web: <a href='https://filiprojek.cz' target='_blank'>www.filiprojek.cz</a><br>telegram: <a href='https://t.me/filiprojek' target='_blank'>@filiprojek</a>";
			break;
		case "clear":
			write("000ctrll");
			return false;
		case "echo":
			line = "";
			command.forEach((cmd, i) => {
				if (i === 0) return;
				line += cmd + " ";
			});
			line = line.substring(0, line.length - 1); // remove last space
			break;
		default:
			line = "frsh: " + command[0] + ": command not found";
			break;
	}

	return line;
}

function write(key, payload) {
	switch (key) {
		case "Enter": {
			command = c.lastChild.textContent.replace(ps1, "");
			command = command.split(" ");
			const out = exec(command);
			if (out !== false) {
				line = document.createElement("p");
				line.innerHTML += out;
				line.innerHTML += "<br>";
				c.appendChild(line);
				line = document.createElement("p");
				line.innerHTML += ps1;
				c.appendChild(line);
			}
			command = "";
			break;
		}
		case "000ctrll":
			c.innerHTML = "";
			if (payload == motd) c.innerHTML = motd;
			line = document.createElement("p");
			line.innerHTML += ps1;
			c.appendChild(line);
			break;
		case "000backspace":
			if (c.lastChild.textContent.slice(0, -1) !== ps1.slice(0, -1)) {
				c.lastChild.innerHTML = c.lastChild.textContent.slice(0, -1);
			}
			break;

		default:
			c.lastChild.innerHTML += key;
	}
}

function customCtrlShortcuts(plusKey) {
	document.addEventListener("keydown", (e) => {
		if (e.ctrlKey && e.key == plusKey) {
			e.preventDefault();
			write("000ctrl" + plusKey);
		}
	});
}

// On load init the terminal
window.addEventListener("load", () => {
	write("000ctrll", motd);
	if (navigator.userAgent.toLowerCase().includes("mobile")) {
		const mi = document.querySelector(".mobile-input");
		mi.style = "opacity: 0; width: 0; height: 0";
		c.addEventListener("click", (e) => {
			mi.focus();
		});
	}
});

// Capture the keypress
window.addEventListener("keypress", (e) => {
	e.preventDefault();
	write(e.key);
});

window.addEventListener("keydown", (e) => {
	if (e.key == "Backspace") {
		e.preventDefault();
		write("000backspace");
	}
});

// Register custom ctrl shortcuts
customCtrlShortcuts("l"); // ctrl + l
customCtrlShortcuts("c"); // ctrl + c