"use strict";

const COLORS = [
	"\x1b[34m", // blue
	"\x1b[31m", // red
	"\x1b[33m", // yellow
	"\x1b[32m", // green
	"\x1b[36m", // cyan
	"\x1b[35m", // magenta
	"\x1b[37m"  // white
];

const BOLD = "\x1b[1m";
const CLEAR = "\x1b[0m";

const START_MARKER = "●";
const CONTINUATION_MARKER = "|";
const END_MARKER = "+";
const SINGLE_MARKER = "●";

export function make() {
	let channelMap = new Map<string, string>();

	function create(data: LoggerCreationData) {
		channelMap.set(data.logger, COLORS[channelMap.size % COLORS.length]);
		process.stdout.write(`${BOLD}${channelMap.get(data.logger)}${START_MARKER} ${data.logger}${CLEAR}\n`);
	}

	function message(data: LoggerMessageData) {
		let lines = data.message.split("\n");
		let color = channelMap.get(data.logger);
		let message = " ";

		if (data.delta !== undefined) {
			message += `${color}[+${data.delta}ms]${CLEAR} `;
		}

		if (data.callsite !== undefined) {
			message += `[${data.callsite}] `;
		}

		if (lines.length === 1) {
			message = `${color}${SINGLE_MARKER}${CLEAR}` + message;
			message += lines[0];
			message += "\n";
		} else {
			message = `${channelMap.get(data.logger)}${START_MARKER}${CLEAR}` + message;
			message += lines.slice(0, lines.length - 1).join(`\n${channelMap.get(data.logger)}${CONTINUATION_MARKER}${CLEAR} `);
			message += `\n${channelMap.get(data.logger)}${END_MARKER}${CLEAR} `;
			message += lines[lines.length - 1];
			message += "\n";
		}

		process.stdout.write(message);
	}

	return { create, message };
}