import {ArgParser} from './scripts/lib/arg-parser';

/**
 * Manages hacknet nodes, purchasing nodes to reach the desired amount.
 * Upgrades (Level, RAM, Cores & Cache) will be automatically purchased.
 */
export async function main(ns) {
	ns.disableLog('ALL');

	/**
	 * Print header with logs
	 * @param message - message to append to logs
	 */
	function log(message) {
		ns.clearLog();
		ns.print('===================================================');
		ns.print(`🖥️ Node Manager: ${nodeCount}/${limit} Nodes`);
		ns.print('===================================================');
		if(message != null) messageHistory.push(message);
		messageHistory.splice(0, messageHistory.length - historyLength);
		messageHistory.forEach(m => ns.print(m));
	}

	// Initilize script arguments
	const argParser = new ArgParser({
		desc: 'Buy, upgrade & manage Hacknet nodes automatically. Tail for live updates.',
		examples: [
			'run node-manager.js [OPTIONS] LIMIT',
			'run node-manager.js --balance 1E6 4',
			'run node-manager.js --help',
		],
		args: [
			{key: 'LIMIT', desc: 'Limit the number of nodes the manager will buy'},
			{key: 'balance', alias: 'b', type: 'num', optional: true, desc: 'Prevent spending bellow this point'},
			{key: 'help', alias: 'h', optional: true, desc: 'Display help message'},
		]
	});
	const args = argParser.parse(ns.args);

	// Check arguments
	if(args['help']) return ns.tprint(argParser.help());
	if(!args['LIMIT']) return ns.tprint(argParser.help('Missing LIMIT'));
	if(isNaN(args['LIMIT'])) return ns.tprint(argParser.help('LIMIT must be a number'));
	if(!!args['balance'] && isNaN(args['balance'])) return ns.tprint(argParser.help('LIMIT must be a number'));
	
	// Setup
	const historyLength = 17;
	const messageHistory = Array(historyLength).fill('');
	const limit = args['LIMIT'];
	const savings = args['balance'] ?? 0
	const nodeCount = ns.hacknet.numNodes();

	log();
    while(true) {
		const balance = ns.getServerMoneyAvailable('home');

		// Check if we should buy a new node
		if(nodeCount < limit && balance - ns.hacknet.getPurchaseNodeCost() >= savings) {
 			nodeCount++;
			ns.hacknet.purchaseNode();
			log(`Buying Node ${nodeCount}`);
		} else {
			// Create an ordered list of nodes by their cheapest upgrade
			const nodes = Array(nodeCount).fill(null)
				.map((ignore, i) => ({ // Gather information
					index: i,
					cacheCost: ns.hacknet.getCacheUpgradeCost(i),
					coreCost: ns.hacknet.getCoreUpgradeCost(i),
					levelCost: ns.hacknet.getLevelUpgradeCost(i),
					ramCost: ns.hacknet.getRamUpgradeCost(i),
					...ns.hacknet.getNodeStats(i)
				})).map(node => { // Figure out cheapest upgrade
					if(node.cacheCost != 0 && node.cacheCost != Infinity && node.cacheCost <= node.coreCost && node.cacheCost <= node.levelCost && node.cacheCost <= node.ramCost) {
						node.bestUpgrade = {
							name: 'cache',
							cost: node.cacheCost,
							purchase: () => ns.hacknet.upgradeCache(node.index)
						};
					} else if(node.coreCost != 0 && node.coreCost != Infinity && node.coreCost <= node.cacheCost && node.coreCost <= node.levelCost && node.coreCost <= node.ramCost) {
						node.bestUpgrade = {
							name: 'cores',
							cost: node.coreCost,
							purchase: () => ns.hacknet.upgradeCore(node.index)
						};
					} else if(node.ramCost != 0 && node.ramCost != Infinity && node.ramCost <= node.cacheCost && node.ramCost <= node.levelCost && node.ramCost <= node.coreCost) {
						node.bestUpgrade = {
							name: 'ram',
							cost: node.ramCost,
							purchase: () => ns.hacknet.upgradeRam(node.index)
						};
					} else {
						node.bestUpgrade = {
							name: 'level',
							cost: node.levelCost,
							purchase: () => ns.hacknet.upgradeLevel(node.index)
						};
					}
					return node;
				}).sort((a, b) => { // Sort by cheapest upgrade
					if(a.bestUpgrade.cost > b.bestUpgrade.cost) return 1;
					if(a.bestUpgrade.cost < b.bestUpgrade.cost) return -1;
					return 0;
				});
			
			// Apply the cheapest upgrade
			if(nodes.length && balance - nodes[0].bestUpgrade.cost >= savings) {
				const cost = Math.round(nodes[0].bestUpgrade.cost * 100) / 100;
				log(`Node ${nodes[0].index} - ${nodes[0].bestUpgrade.name} ${nodes[0][nodes[0].bestUpgrade.name] + 1} - $${cost}`);
				nodes[0].bestUpgrade.purchase();
			}
		}

		// Check again in 1s
		await ns.sleep(1000);
	}
}