import { profile } from '#lib/content';
import { themes } from '#lib/theme/themes';
import { allSitePages, findSitePage, sitePages } from '#lib/site/pages';
import { blankLine, errorLine, line, span } from '../output';
import type { Command } from './types';

function cowsay(message: string): string[] {
	const text = message || 'Moo?';
	const border = '-'.repeat(text.length + 2);
	return [
		` ${border}`,
		`< ${text} >`,
		` ${border}`,
		'        \\   ^__^',
		'         \\  (oo)\\_______',
		'            (__)\\       )\\/\\',
		'                ||----w |',
		'                ||     ||'
	];
}

function easternDate(): string {
	return new Date().toLocaleString('en-US', {
		timeZone: 'America/New_York',
		weekday: 'long',
		year: 'numeric',
		month: 'long',
		day: 'numeric',
		hour: '2-digit',
		minute: '2-digit',
		second: '2-digit',
		timeZoneName: 'short'
	});
}

export const systemCommands: Command[] = [
	{
		name: 'clear',
		aliases: ['cls'],
		description: 'Clear the terminal',
		run: (_args, context) => context.clear()
	},
	{
		name: 'ls',
		aliases: ['dir', 'tree'],
		description: 'List the pages you can open',
		run: (_args, context) => {
			context.print(line(span('~', 'blue', { bold: true })));
			sitePages.forEach((page, pageIndex) => {
				const isLastPage = pageIndex === sitePages.length - 1;
				context.print(line(span(isLastPage ? '└── ' : '├── ', 'muted'), span(`${page.name}/`, 'blue', { bold: true })));
				page.children?.forEach((child, childIndex) => {
					const isLastChild = childIndex === page.children!.length - 1;
					const indent = isLastPage ? '    ' : '│   ';
					context.print(line(span(`${indent}${isLastChild ? '└── ' : '├── '}`, 'muted'), span(`${child.name}/`, 'cyan')));
				});
			});
			context.print(blankLine);
		}
	},
	{
		name: 'cd',
		aliases: ['open', 'goto'],
		description: 'Open a page in a window',
		usage: 'cd <page>, for example cd projects/hackathons',
		argumentOptions: () => ['~', ...allSitePages.map((page) => page.path.slice(1))],
		run: (args, context) => {
			const target = args[0] ?? '~';
			if (target === '~' || target === '/' || target === 'home') {
				context.openPage('/');
				return;
			}
			const page = findSitePage(target);
			if (!page) {
				context.print(errorLine(`no such page: ${target}. Try ls`));
				return;
			}
			context.print(line(span('opening ', 'muted'), span(page.path, 'accent')));
			context.openPage(page.path);
		}
	},
	{
		name: 'theme',
		description: 'List or set the color theme',
		usage: 'theme [name]',
		argumentOptions: () => themes.map((theme) => theme.id),
		run: (args, context) => {
			if (!args[0]) {
				themes.forEach((theme) => {
					const isCurrent = theme.id === context.currentThemeId();
					context.print(line(span(isCurrent ? '* ' : '  ', 'accent'), span(theme.id, isCurrent ? 'accent' : 'foreground'), span(`  ${theme.mode}`, 'muted')));
				});
				return;
			}
			if (context.setTheme(args[0].toLowerCase())) context.print(line(span('theme set to ', 'muted'), span(args[0], 'accent')));
			else context.print(errorLine(`unknown theme ${args[0]}. Run theme to list them`));
		}
	},
	{
		name: 'echo',
		description: 'Print text back',
		usage: 'echo <text>',
		run: (args, context) => context.print(line(args.join(' ')))
	},
	{
		name: 'cowsay',
		description: 'Make a cow say something',
		usage: 'cowsay <text>',
		run: (args, context) => context.print(...cowsay(args.join(' ')).map((text) => line(span(text, 'accent'))))
	},
	{
		name: 'date',
		description: 'Show the current date and time (Eastern)',
		run: (_args, context) => context.print(line(easternDate()))
	},
	{
		name: 'exit',
		description: 'Close this terminal',
		run: (_args, context) => context.exit()
	},
	{
		name: 'sudo',
		hidden: true,
		description: 'Elevated privileges',
		run: (_args, context) =>
			context.print(errorLine(`${profile.username} is not in the sudoers file. This incident will be reported.`))
	},
	{
		name: 'pwd',
		hidden: true,
		description: 'Print working directory',
		run: (_args, context) => context.print(line(`/home/${profile.username}`))
	}
];