#!/usr/bin/env php
<?php
declare(strict_types=1);
require_once __DIR__ . '/_cli.php';
require_once __DIR__ . '/i18n/I18nCompletionValidator.php';
require_once __DIR__ . '/i18n/I18nData.php';
require_once __DIR__ . '/i18n/I18nFile.php';
require_once __DIR__ . '/i18n/I18nUsageValidator.php';
require_once __DIR__ . '/../constants.php';

$cliOptions = new class extends CliOptionsParser {
	/** @var array<int,string> $language */
	public array $language;
	public string $displayResult;
	public string $help;
	public string $displayReport;

	public function __construct() {
		$this->addOption('language', (new CliOption('language', 'l'))->typeOfArrayOfString());
		$this->addOption('displayResult', (new CliOption('display-result', 'd'))->withValueNone());
		$this->addOption('help', (new CliOption('help', 'h'))->withValueNone());
		$this->addOption('displayReport', (new CliOption('display-report', 'r'))->withValueNone());
		parent::__construct();
	}
};

if (!empty($cliOptions->errors)) {
	fail('FreshRSS error: ' . array_shift($cliOptions->errors) . "\n" . $cliOptions->usage);
}
if (isset($cliOptions->help)) {
	checkHelp();
}

$i18nFile = new I18nFile();
$i18nData = new I18nData($i18nFile->load());

if (isset($cliOptions->language)) {
	$languages = $cliOptions->language;
} else {
	$languages = $i18nData->getAvailableLanguages();
}
$displayResults = isset($cliOptions->displayResult);
$displayReport = isset($cliOptions->displayReport);

$isValidated = true;
$result = [];
$report = [];

foreach ($languages as $language) {
	if ($language === $i18nData::REFERENCE_LANGUAGE) {
		$i18nValidator = new I18nUsageValidator($i18nData->getReferenceLanguage(), findUsedTranslations());
	} else {
		$i18nValidator = new I18nCompletionValidator($i18nData->getReferenceLanguage(), $i18nData->getLanguage($language));
	}
	$isValidated = $i18nValidator->validate() && $isValidated;

	$report[$language] = sprintf('%-5s - %s', $language, $i18nValidator->displayReport());
	$result[$language] = $i18nValidator->displayResult();
}

if ($displayResults) {
	foreach ($result as $lang => $value) {
		echo 'Language: ', $lang, PHP_EOL;
		print_r($value);
		echo PHP_EOL;
	}
}

if ($displayReport) {
	foreach ($report as $value) {
		echo $value;
	}
}

if (!$isValidated) {
	exit(1);
}

/**
 * Find used translation keys in the project
 *
 * Iterates through all php and phtml files in the whole project and extracts all
 * translation keys used.
 *
 * @return array<string>
 */
function findUsedTranslations(): array {
	$directory = new RecursiveDirectoryIterator(__DIR__ . '/..');
	$iterator = new RecursiveIteratorIterator($directory);
	$regex = new RegexIterator($iterator, '/^.+\.(php|phtml)$/i', RecursiveRegexIterator::GET_MATCH);
	$usedI18n = [];
	foreach (array_keys(iterator_to_array($regex)) as $file) {
		$fileContent = file_get_contents($file);
		if ($fileContent === false) {
			continue;
		}
		preg_match_all('/_t\([\'"](?P<strings>[^\'"]+)[\'"]/', $fileContent, $matches);
		$usedI18n = array_merge($usedI18n, $matches['strings']);
	}
	return $usedI18n;
}

/**
 * Output help message.
 */
function checkHelp(): never {
	$file = str_replace(__DIR__ . '/', '', __FILE__);

	echo <<<HELP
NAME
	$file

SYNOPSIS
	php $file [OPTION]...

DESCRIPTION
	Check if translation files have missing keys or missing translations.

	-d, --display-result	display results.
	-h, --help		display this help and exit.
	-l, --language=LANG	filter by LANG.
	-r, --display-report	display completion report.

HELP;
	exit();
}
