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

/* Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * FILE INFORMATION
 * DEFGROUP: mokocli.CLI
 * INGROUP: mokocli
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/mokocli
 * PATH: /cli/release_cascade.php
 * VERSION: 10.00.00
 * BRIEF: Cascade release zip to all lower stability channels
 */

declare(strict_types=1);

require_once __DIR__ . '/../lib/Enterprise/CliFramework.php';

use MokoEnterprise\CliFramework;

class ReleaseCascadeCli extends CliFramework
{
    /** Channel hierarchy: highest stability first. */
    private const CHANNELS = ['stable', 'release-candidate', 'beta', 'alpha', 'development'];

    /** Map stability input names to canonical tag names. */
    private const TAG_MAP = [
        'stable'            => 'stable',
        'release-candidate' => 'release-candidate',
        'rc'                => 'release-candidate',
        'beta'              => 'beta',
        'alpha'             => 'alpha',
        'development'       => 'development',
        'dev'               => 'development',
    ];

    protected function configure(): void
    {
        $this->setDescription('Cascade release zip to all lower stability channels');
        $this->addArgument('--stability', 'Source stability channel (required)', '');
        $this->addArgument('--token', 'Gitea API token (required)', '');
        $this->addArgument('--api-base', 'Gitea API base URL for the repo (required)', '');
    }

    protected function run(): int
    {
        $stability = strtolower($this->getArgument('--stability'));
        $token     = $this->getArgument('--token');
        $apiBase   = rtrim($this->getArgument('--api-base'), '/');

        if ($token === '') {
            $envToken = getenv('MOKOGITEA_TOKEN');
            if ($envToken === false || $envToken === '') {
                $envToken = getenv('GITEA_TOKEN');
            }
            if ($envToken !== false && $envToken !== '') {
                $token = $envToken;
            }
        }

        if ($stability === '' || $token === '' || $apiBase === '') {
            $this->log('ERROR', 'Usage: release_cascade.php --stability CHANNEL --token TOKEN --api-base URL');
            return 1;
        }

        $sourceTag = self::TAG_MAP[$stability] ?? null;
        if ($sourceTag === null) {
            $this->log('ERROR', "Unknown stability: {$stability}");
            return 1;
        }

        // Find lower channels to cascade to
        $lowerChannels = $this->getLowerChannels($sourceTag);
        if (count($lowerChannels) === 0) {
            $this->log('INFO', "No lower channels for '{$stability}' — nothing to cascade.");
            return 0;
        }

        $this->log('INFO', "Cascading from '{$sourceTag}' to: " . implode(', ', $lowerChannels));

        if ($this->dryRun) {
            $this->log('INFO', '[DRY RUN] No changes will be made.');
        }

        // 1. Get source release
        $sourceRelease = $this->giteaApi("{$apiBase}/releases/tags/{$sourceTag}", $token);
        if ($sourceRelease === null) {
            $this->log('WARN', "No release found at tag '{$sourceTag}' — nothing to cascade.");
            return 0;
        }

        $sourceVersion = $sourceRelease['name'] ?? $sourceTag;
        $sourceBody    = $sourceRelease['body'] ?? '';
        $sourceAssets  = $sourceRelease['assets'] ?? [];

        // Find zip assets (exclude .sha256 sidecars)
        $zipAssets = array_filter($sourceAssets, function (array $asset): bool {
            $name = strtolower($asset['name'] ?? '');
            return str_ends_with($name, '.zip') && !str_ends_with($name, '.sha256');
        });

        // Also grab sha256 sidecars
        $sha256Assets = array_filter($sourceAssets, function (array $asset): bool {
            return str_ends_with(strtolower($asset['name'] ?? ''), '.zip.sha256');
        });

        if (count($zipAssets) === 0) {
            $this->log('WARN', "Source release '{$sourceTag}' has no zip assets — nothing to cascade.");
            return 0;
        }

        $this->log('INFO', "Source: {$sourceVersion} — " . count($zipAssets) . " zip(s)");
        echo "\n";

        // 2. Download source assets to temp files
        $downloads = [];
        foreach (array_merge($zipAssets, $sha256Assets) as $asset) {
            $url = $asset['browser_download_url'] ?? '';
            if ($url === '') {
                continue;
            }
            $tmpFile = tempnam(sys_get_temp_dir(), 'cascade_');
            if ($this->downloadFile($url, $token, $tmpFile)) {
                $downloads[] = ['name' => $asset['name'], 'path' => $tmpFile];
                $this->log('INFO', "Downloaded: {$asset['name']}");
            } else {
                $this->log('ERROR', "Failed to download: {$asset['name']}");
            }
        }

        if (count($downloads) === 0) {
            $this->log('ERROR', 'Could not download any source assets.');
            return 1;
        }

        // 3. Cascade to each lower channel
        $errors = 0;
        foreach ($lowerChannels as $targetTag) {
            echo "\n";
            $result = $this->cascadeToChannel(
                $apiBase, $token, $targetTag,
                $sourceVersion, $sourceBody, $downloads
            );
            if (!$result) {
                $errors++;
            }
        }

        // 4. Cleanup temp files
        foreach ($downloads as $dl) {
            @unlink($dl['path']);
        }

        echo "\n";
        $this->log('INFO', "Cascade complete. " . (count($lowerChannels) - $errors)
            . "/" . count($lowerChannels) . " channels updated.");

        return $errors > 0 ? 1 : 0;
    }

    /**
     * Cascade assets to a single target channel.
     */
    private function cascadeToChannel(
        string $apiBase,
        string $token,
        string $targetTag,
        string $sourceVersion,
        string $sourceBody,
        array $downloads
    ): bool {
        $this->log('INFO', "→ {$targetTag}");

        if ($this->dryRun) {
            $this->log('INFO', "  [DRY RUN] Would cascade to {$targetTag}");
            return true;
        }

        // Find existing release at target tag
        $existing = $this->giteaApi("{$apiBase}/releases/tags/{$targetTag}", $token);

        if ($existing !== null && !empty($existing['id'])) {
            $releaseId = (int) $existing['id'];

            // Delete existing assets
            $existingAssets = $existing['assets'] ?? [];
            foreach ($existingAssets as $asset) {
                $assetId = $asset['id'] ?? 0;
                if ($assetId > 0) {
                    $this->giteaApi(
                        "{$apiBase}/releases/{$releaseId}/assets/{$assetId}",
                        $token, 'DELETE'
                    );
                }
            }

            // Update release metadata
            $updatePayload = json_encode([
                'name' => $sourceVersion,
                'body' => $sourceBody,
            ]);
            $this->giteaApi(
                "{$apiBase}/releases/{$releaseId}",
                $token, 'PATCH', $updatePayload
            );

            $this->log('INFO', "  Updated release metadata (id: {$releaseId})");
        } else {
            // Create new release at target tag
            // Use the source release's target commitish so the tag points to the same commit
            $createPayload = json_encode([
                'tag_name'          => $targetTag,
                'target_commitish'  => 'main',
                'name'              => $sourceVersion,
                'body'              => $sourceBody,
                'prerelease'        => ($targetTag !== 'stable'),
            ]);
            $newRelease = $this->giteaApi("{$apiBase}/releases", $token, 'POST', $createPayload);
            if ($newRelease === null || empty($newRelease['id'])) {
                $this->log('ERROR', "  Failed to create release at tag '{$targetTag}'");
                return false;
            }
            $releaseId = (int) $newRelease['id'];
            $this->log('INFO', "  Created release (id: {$releaseId})");
        }

        // Upload assets
        foreach ($downloads as $dl) {
            $uploadUrl = "{$apiBase}/releases/{$releaseId}/assets?name=" . rawurlencode($dl['name']);
            $success = $this->uploadAsset($uploadUrl, $token, $dl['path'], $dl['name']);
            if ($success) {
                $this->log('INFO', "  Uploaded: {$dl['name']}");
            } else {
                $this->log('ERROR', "  Failed to upload: {$dl['name']}");
            }
        }

        return true;
    }

    /**
     * Get all channels below the given source channel.
     */
    private function getLowerChannels(string $sourceTag): array
    {
        $idx = array_search($sourceTag, self::CHANNELS, true);
        if ($idx === false) {
            return [];
        }
        return array_slice(self::CHANNELS, $idx + 1);
    }

    /**
     * Download a file via HTTP.
     */
    private function downloadFile(string $url, string $token, string $destPath): bool
    {
        $ch = curl_init($url);
        if ($ch === false) {
            return false;
        }
        $fp = fopen($destPath, 'wb');
        if ($fp === false) {
            return false;
        }
        curl_setopt_array($ch, [
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_FILE           => $fp,
            CURLOPT_HTTPHEADER     => ["Authorization: token {$token}"],
            CURLOPT_TIMEOUT        => 120,
        ]);
        curl_exec($ch);
        $code = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        fclose($fp);
        return $code >= 200 && $code < 300;
    }

    /**
     * Upload a file as a release asset via multipart form.
     */
    private function uploadAsset(string $url, string $token, string $filePath, string $fileName): bool
    {
        $ch = curl_init($url);
        if ($ch === false) {
            return false;
        }
        $cfile = new CURLFile($filePath, 'application/octet-stream', $fileName);
        curl_setopt_array($ch, [
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_POST           => true,
            CURLOPT_POSTFIELDS     => ['attachment' => $cfile],
            CURLOPT_HTTPHEADER     => ["Authorization: token {$token}"],
            CURLOPT_TIMEOUT        => 120,
        ]);
        $response = curl_exec($ch);
        $code = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        return $code >= 200 && $code < 300;
    }

    /**
     * Make an HTTP request to the Gitea API.
     */
    private function giteaApi(
        string $url,
        string $token,
        string $method = 'GET',
        ?string $body = null
    ): ?array {
        $ch = curl_init($url);
        if ($ch === false) {
            return null;
        }
        curl_setopt_array($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);
        $httpCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($httpCode < 200 || $httpCode >= 300 || empty($response) || !is_string($response)) {
            return null;
        }

        $decoded = json_decode($response, true);
        return is_array($decoded) ? $decoded : null;
    }
}

$app = new ReleaseCascadeCli();
exit($app->execute());