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

/* Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * FILE INFORMATION
 * DEFGROUP: moko-platform.CLI
 * INGROUP: moko-platform
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /cli/release_mirror.php
 * BRIEF: Mirror a Gitea release (with assets) to a GitHub repository
 *
 * Usage:
 *   php release_mirror.php --version 09.01.00 --tag stable --token TOKEN --api-base URL \
 *       --gh-token GH_TOKEN --gh-repo MokoConsulting/MokoWaaS
 *
 * Mirrors a Gitea release (title, body, assets) to a corresponding GitHub release.
 * If the GitHub release already exists at the same tag, its title is updated via PATCH.
 * All assets from the Gitea release are downloaded and uploaded to the GitHub release.
 */

declare(strict_types=1);

// ── Argument parsing ─────────────────────────────────────────────────────────

$version = null;
$tag = null;
$token = null;
$apiBase = null;
$ghToken = null;
$ghRepo = null;
$branch = 'main';

foreach ($argv as $i => $arg) {
    if ($arg === '--version' && isset($argv[$i + 1])) {
        $version = $argv[$i + 1];
    }
    if ($arg === '--tag' && isset($argv[$i + 1])) {
        $tag = $argv[$i + 1];
    }
    if ($arg === '--token' && isset($argv[$i + 1])) {
        $token = $argv[$i + 1];
    }
    if ($arg === '--api-base' && isset($argv[$i + 1])) {
        $apiBase = $argv[$i + 1];
    }
    if ($arg === '--gh-token' && isset($argv[$i + 1])) {
        $ghToken = $argv[$i + 1];
    }
    if ($arg === '--gh-repo' && isset($argv[$i + 1])) {
        $ghRepo = $argv[$i + 1];
    }
    if ($arg === '--branch' && isset($argv[$i + 1])) {
        $branch = $argv[$i + 1];
    }
}

// Allow tokens from environment
$token = $token ?: (getenv('GA_TOKEN') ?: (getenv('GITEA_TOKEN') ?: null));
$ghToken = $ghToken ?: (getenv('GH_TOKEN') ?: null);

if (
    $version === null || $tag === null || $token === null || $apiBase === null
    || $ghToken === null || $ghRepo === null
) {
    fwrite(STDERR, "Usage: release_mirror.php --version VER --tag TAG --token TOKEN " .
        "--api-base URL --gh-token GH_TOKEN --gh-repo org/repo [--branch main]\n");
    fwrite(STDERR, "  --token: Gitea token (or GA_TOKEN / GITEA_TOKEN env)\n");
    fwrite(STDERR, "  --gh-token: GitHub token (or GH_TOKEN env)\n");
    exit(1);
}

// ── Helper: Gitea API request ────────────────────────────────────────────────

/**
 * Send a request to the Gitea API.
 *
 * @param string      $url    Full Gitea API URL
 * @param string      $token  Gitea API token
 * @param string      $method HTTP method (GET, POST, PATCH, DELETE)
 * @param string|null $body   JSON request body or null
 *
 * @return array<string, mixed>|null Decoded response or null on failure
 */
function giteaApi(string $url, string $token, string $method = 'GET', ?string $body = null): ?array
{
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HTTPHEADER => [
            "Authorization: token {$token}",
            'Content-Type: application/json',
        ],
        CURLOPT_TIMEOUT => 30,
        CURLOPT_CUSTOMREQUEST => $method,
    ]);
    if ($body !== null) {
        curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
    }
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($httpCode < 200 || $httpCode >= 300 || empty($response)) {
        return null;
    }
    return json_decode($response, true) ?: null;
}

/**
 * Download a file from Gitea to a local path.
 *
 * @param string $url   Download URL
 * @param string $token Gitea API token
 * @param string $dest  Local destination path
 *
 * @return bool True on success
 */
function giteaDownload(string $url, string $token, string $dest): bool
{
    $ch = curl_init($url);
    $fp = fopen($dest, 'wb');
    curl_setopt_array($ch, [
        CURLOPT_HTTPHEADER => ["Authorization: token {$token}"],
        CURLOPT_FILE => $fp,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_TIMEOUT => 120,
    ]);
    curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    fclose($fp);
    return $httpCode >= 200 && $httpCode < 300;
}

/**
 * Send a request to the GitHub API.
 *
 * @param string      $url    Full GitHub API URL
 * @param string      $token  GitHub personal access token
 * @param string      $method HTTP method (GET, POST, PATCH, DELETE)
 * @param string|null $body   JSON request body or null
 *
 * @return array<string, mixed>|null Decoded response or null on failure
 */
function githubApi(string $url, string $token, string $method = 'GET', ?string $body = null): ?array
{
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HTTPHEADER => [
            "Authorization: token {$token}",
            'Accept: application/vnd.github+json',
            'User-Agent: moko-platform',
            'Content-Type: application/json',
        ],
        CURLOPT_TIMEOUT => 30,
        CURLOPT_CUSTOMREQUEST => $method,
    ]);
    if ($body !== null) {
        curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
    }
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($httpCode < 200 || $httpCode >= 300 || empty($response)) {
        return null;
    }
    return json_decode($response, true) ?: null;
}

/**
 * Upload a binary asset to a GitHub release.
 *
 * @param string $uploadUrl GitHub upload URL (uploads.github.com)
 * @param string $token     GitHub personal access token
 * @param string $filePath  Local file path to upload
 * @param string $name      Asset filename for GitHub
 *
 * @return int HTTP status code
 */
function githubUploadAsset(string $uploadUrl, string $token, string $filePath, string $name): int
{
    $url = $uploadUrl . '?name=' . urlencode($name);
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_POST => true,
        CURLOPT_HTTPHEADER => [
            "Authorization: token {$token}",
            'Accept: application/vnd.github+json',
            'User-Agent: moko-platform',
            'Content-Type: application/octet-stream',
        ],
        CURLOPT_POSTFIELDS => file_get_contents($filePath),
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_TIMEOUT => 120,
    ]);
    curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    return $httpCode;
}

// ── Step 1: Get Gitea release by tag ─────────────────────────────────────────

echo "Fetching Gitea release: {$tag}\n";
$giteaRelease = giteaApi("{$apiBase}/releases/tags/{$tag}", $token);
if (!$giteaRelease || empty($giteaRelease['id'])) {
    fwrite(STDERR, "No Gitea release found with tag: {$tag}\n");
    exit(1);
}

$giteaId = $giteaRelease['id'];
$releaseName = $giteaRelease['name'] ?? "{$version}";
$releaseBody = $giteaRelease['body'] ?? '';
$assets = $giteaRelease['assets'] ?? [];

echo "  Name: {$releaseName}\n";
echo "  Assets: " . count($assets) . " file(s)\n";

// ── Step 2: Check / create GitHub release ────────────────────────────────────

$ghApiBase = "https://api.github.com/repos/{$ghRepo}";
$ghUploadBase = "https://uploads.github.com/repos/{$ghRepo}";

echo "Checking GitHub release: {$tag}\n";
$ghRelease = githubApi("{$ghApiBase}/releases/tags/{$tag}", $ghToken);

if ($ghRelease && !empty($ghRelease['id'])) {
    // Update existing release title
    $ghReleaseId = $ghRelease['id'];
    echo "  GitHub release exists (id: {$ghReleaseId}), updating title\n";
    $patchPayload = json_encode([
        'name' => $releaseName,
        'body' => $releaseBody,
    ]);
    githubApi("{$ghApiBase}/releases/{$ghReleaseId}", $ghToken, 'PATCH', $patchPayload);
} else {
    // Create new release
    echo "  Creating GitHub release\n";
    $createPayload = json_encode([
        'tag_name'         => $tag,
        'target_commitish' => $branch,
        'name'             => $releaseName,
        'body'             => $releaseBody,
        'draft'            => false,
        'prerelease'       => ($tag !== 'stable'),
    ]);
    $ghRelease = githubApi("{$ghApiBase}/releases", $ghToken, 'POST', $createPayload);
    if (!$ghRelease || empty($ghRelease['id'])) {
        fwrite(STDERR, "Failed to create GitHub release\n");
        exit(1);
    }
    $ghReleaseId = $ghRelease['id'];
    echo "  Created GitHub release (id: {$ghReleaseId})\n";
}

// ── Step 3: Download assets from Gitea ───────────────────────────────────────

$tmpDir = sys_get_temp_dir() . '/moko-mirror-' . getmypid();
@mkdir($tmpDir, 0755, true);

$uploadUrl = "{$ghUploadBase}/releases/{$ghReleaseId}/assets";

foreach ($assets as $asset) {
    $name = $asset['name'] ?? '';
    $downloadUrl = $asset['browser_download_url'] ?? '';
    if ($name === '' || $downloadUrl === '') {
        continue;
    }

    $localPath = "{$tmpDir}/{$name}";
    echo "  Downloading: {$name}\n";

    if (!giteaDownload($downloadUrl, $token, $localPath)) {
        fwrite(STDERR, "  Failed to download: {$name}\n");
        continue;
    }

    // ── Step 4: Upload asset to GitHub ───────────────────────────────────────
    echo "  Uploading: {$name}\n";
    $code = githubUploadAsset($uploadUrl, $ghToken, $localPath, $name);
    $status = ($code >= 200 && $code < 300) ? 'OK' : "FAILED ({$code})";
    echo "    {$status}\n";
}

// ── Cleanup ──────────────────────────────────────────────────────────────────

array_map('unlink', glob("{$tmpDir}/*") ?: []);
@rmdir($tmpDir);

// ── Summary ──────────────────────────────────────────────────────────────────

echo "\nMirror complete: {$tag} -> github.com/{$ghRepo}\n";
echo "  Version: {$version}\n";
echo "  Assets: " . count($assets) . " file(s)\n";
exit(0);