<?php

namespace Automad\Console;

use Automad\Core\FileSystem;

/**
 * The console class.
 *
 * @author Marc Anton Dahmen
 * @copyright Copyright (c) 2021-2023 by Marc Anton Dahmen - https://marcdahmen.de
 * @license MIT license - https://automad.org/license
 */
class Console
{
	/**
	 * The console constructor.
	 *
	 * @param array $argv
	 */
	public function __construct(array $argv)
	{
		echo 'Automad Console version ' . AM_VERSION . PHP_EOL . PHP_EOL;
		$this->runCommand($argv);
		echo PHP_EOL;
	}


	/**
	 * Get the list of available commands.
	 *
	 * @return array the list of command objects
	 */
	private function getCommands(): array
	{
		$files = FileSystem::glob(AM_BASE_DIR . '/automad/src/server/Console/Commands/*.php');

		foreach ($files as $file) {
			require_once $file;
		}

		$classList = array_filter(get_declared_classes(), function ($cls) {
			return (strpos($cls, 'Automad\Console\Commands') !== false && strpos($cls, 'Commands\AbstractCommand') === false);
		});

		$commands = array();

		foreach ($classList as $cls) {
			$command = new $cls();
			$commands[$command->name()] = (object) array(
				'class' => $cls,
				'help' => $command->help()
			);
		}

		return $commands;
	}


	/**
	 * Show the help for all available commands.
	 *
	 * @param array $commands
	 */
	private function help(array $commands): void
	{
		echo PHP_EOL . 'Commands: ' . PHP_EOL;

		foreach ($commands as $name => $command) {
			echo '    ' . str_pad($name, 15) . $command->help . PHP_EOL;
		}
	}


	/**
	 * Run a command based on the $argv array.
	 *
	 * @param array $argv
	 */
	private function runCommand(array $argv): void
	{
		$commands = $this->getCommands();

		if (empty($argv[1])) {
			echo 'Usage:' . PHP_EOL;
			echo '    php automad/console [command]' . PHP_EOL;
			$this->help($commands);
		} else {
			$name = $argv[1];

			if (array_key_exists($name, $commands)) {
				$cls = $commands[$name]->class;
				$command = new $cls;
				$command->run();
			} else {
				echo "The command $name does not exist." . PHP_EOL;
				$this->help($commands);
			}
		}
	}
}
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