"use strict";

const chalk = require("chalk");
const util = require("util");

const INDENT = chalk.gray("│") + " ";

function formatProperties(node) {
	let relevantProperties = Object.keys(node)
		.filter((property) => property !== "type" && typeof node[property] !== "object");

	return relevantProperties
		.map((property) => `${chalk.yellow.bold(property)}: ${util.inspect(node[property], { colors: true })}`)
		.join("  ");
}

function printNode(node, level) {
	if (node != null) {
		console.log(INDENT.repeat(level) + chalk.bold(node.type ?? "") + "   " + formatProperties(node));

		for (let [ key, value ] of Object.entries(node)) {
			if (typeof value === "object" && value != null) {
				let isArray = Array.isArray(value);
	
				console.log(INDENT.repeat(level + 1) + chalk.cyan(key) + ":" + (isArray ? chalk.gray(" []") : ""));
	
				if (isArray) {
					value.forEach((item) => printNode(item, level + 1));
				} else {
					printNode(value, level + 1);
				}
			}
		}
	} else {
		// This should never happen!
		console.log(INDENT.repeat(level) + chalk.bold.red(`! ${node}`));
	}
}

// TODO: Add a non-printing renderAST method, for embedding in existing console.* calls

module.exports = function printAST(ast) {
	return printNode(ast, 0);
};