#!/usr/bin/env php
<?php

/* Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
 *
 * This file is part of a Moko Consulting project.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * FILE INFORMATION
 * DEFGROUP: MokoStandards.Scripts.Validate
 * INGROUP: MokoStandards
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /validate/check_license_headers.php
 * BRIEF: Validates SPDX license headers in source files (advisory)
 */

declare(strict_types=1);

require_once __DIR__ . '/../../vendor/autoload.php';

use MokoEnterprise\CliFramework;

/**
 * Checks that tracked PHP, JS, CSS and Shell files contain an SPDX license identifier.
 *
 * This is an advisory check — always exits 0 regardless of findings.
 */
class CheckLicenseHeaders extends CliFramework
{
    /**
     * Configure available arguments.
     */
    protected function configure(): void
    {
        $this->setDescription('Validates SPDX license headers in source files (advisory)');
        $this->addArgument('--path', 'Repository path to check', '.');
    }

    /**
     * Run the license-header check (advisory — always exits 0).
     *
     * @return int  Exit code: always 0.
     */
    protected function run(): int
    {
        $path     = $this->getArgument('--path');
        $patterns = ['*.php', '*.js', '*.css', '*.sh'];
        $quoted   = implode(' ', array_map('escapeshellarg', $patterns));
        $output   = shell_exec('git -C ' . escapeshellarg($path) . " ls-files {$quoted} 2>/dev/null") ?? '';
        $files    = array_filter(explode("\n", $output));
        $missing  = 0;
        $i        = 0;
        $total    = count($files);

        $this->section('Scanning license headers');

        foreach ($files as $file) {
            $fullPath = $path . '/' . $file;
            if (!is_file($fullPath)) {
                continue;
            }
            if ($total >= 3) {
                $this->progress(++$i, $total, basename((string) $file));
            }
            $handle = fopen($fullPath, 'r');
            if ($handle === false) {
                continue;
            }
            $header = '';
            for ($j = 0; $j < 20 && !feof($handle); $j++) {
                $header .= (string) fgets($handle);
            }
            fclose($handle);
            if (!str_contains($header, 'SPDX-License-Identifier:')) {
                $this->warning("Missing SPDX license identifier: {$file}");
                $missing++;
            }
        }
        if ($total >= 3) {
            $this->progress($total, $total, 'done', true);
        }

        if ($missing === 0) {
            $this->status(true, 'All source files have license headers');
        } else {
            $this->status(false, 'Some files missing license headers (advisory)', "{$missing} file(s)");
        }

        $this->printSummary(max(0, $total - $missing), $missing, $this->elapsed());
        return 0;
    }
}

$script = new CheckLicenseHeaders('check_license_headers', 'Validates SPDX license headers in source files');
exit($script->execute());