#!/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/workflow_sync.php
 * VERSION: 09.25.02
 * BRIEF: Sync workflows from Generic → platform templates → live repos based on manifest.platform
 */

declare(strict_types=1);

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

use MokoEnterprise\CliFramework;

class WorkflowSyncCli extends CliFramework
{
    private const PLATFORM_TEMPLATES = [
        'joomla'   => 'Template-Joomla',
        'dolibarr' => 'Template-Dolibarr',
        'go'       => 'Template-Go',
        'mcp'      => 'Template-MCP',
        'platform' => 'Template-Generic',
        'generic'  => 'Template-Generic',
    ];

    private const DEFAULT_TEMPLATE = 'Template-Generic';
    private const GENERIC_TEMPLATE = 'Template-Generic';

    private int $updated = 0;
    private int $created = 0;
    private int $skipped = 0;
    private int $errors = 0;

    protected function configure(): void
    {
        $this->setDescription('Sync workflows from Generic → platform templates → live repos based on manifest.platform');
        $this->addArgument('--gitea-url', 'Gitea URL (default: https://git.mokoconsulting.tech)', 'https://git.mokoconsulting.tech');
        $this->addArgument('--token', 'Gitea API token', '');
        $this->addArgument('--org', 'Target organization', '');
        $this->addArgument('--branch', 'Target branch (default: main)', 'main');
        $this->addArgument('--phase', 'Phase to run: all, templates, repos (default: all)', 'all');
        $this->addArgument('--platform-filter', 'Only sync repos matching this platform', '');
    }

    protected function run(): int
    {
        $giteaUrl = rtrim($this->getArgument('--gitea-url'), '/');
        $token = $this->getArgument('--token');
        $org = $this->getArgument('--org');
        $branch = $this->getArgument('--branch');
        $phase = $this->getArgument('--phase');
        $platformFilter = $this->getArgument('--platform-filter');

        if ($token === '') {
            $this->log('ERROR', '--token is required.');
            return 1;
        }

        if ($org === '') {
            $this->log('ERROR', '--org is required.');
            return 1;
        }

        if (!in_array($phase, ['all', 'templates', 'repos'], true)) {
            $this->log('ERROR', "--phase must be one of: all, templates, repos (got: {$phase})");
            return 1;
        }

        $this->log('INFO', "Workflow Sync — org: {$org}, branch: {$branch}, phase: {$phase}");

        if ($platformFilter !== '') {
            $this->log('INFO', "Platform filter: {$platformFilter}");
        }

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

        echo "\n";

        // Phase 1: Sync Generic → Platform Templates
        if ($phase === 'all' || $phase === 'templates') {
            $result = $this->syncGenericToTemplates($giteaUrl, $token, $org, $branch, $platformFilter);

            if ($result !== 0) {
                return $result;
            }
        }

        // Phase 2: Sync Platform Templates → Live Repos
        if ($phase === 'all' || $phase === 'repos') {
            $result = $this->syncTemplatesToRepos($giteaUrl, $token, $org, $branch, $platformFilter);

            if ($result !== 0) {
                return $result;
            }
        }

        echo "\n";
        $this->log('INFO', "Done: {$this->created} created, {$this->updated} updated, "
            . "{$this->skipped} skipped, {$this->errors} error(s).");

        return $this->errors > 0 ? 1 : 0;
    }

    /**
     * Phase 1: Push all Generic workflows to each platform template repo.
     * Skips platform-specific overrides (files that exist in the platform template but NOT in Generic).
     */
    private function syncGenericToTemplates(
        string $giteaUrl,
        string $token,
        string $org,
        string $branch,
        string $platformFilter
    ): int {
        $this->log('INFO', '=== Phase 1: Sync Generic → Platform Templates ===');
        echo "\n";

        // Get all workflow files from Template-Generic
        $genericWorkflows = $this->listWorkflows($giteaUrl, $token, $org, self::GENERIC_TEMPLATE, $branch);

        if ($genericWorkflows === null) {
            $this->log('ERROR', 'Could not list workflows from ' . self::GENERIC_TEMPLATE);
            return 1;
        }

        if (count($genericWorkflows) === 0) {
            $this->log('WARN', 'No workflows found in ' . self::GENERIC_TEMPLATE);
            return 0;
        }

        $this->log('INFO', 'Found ' . count($genericWorkflows) . ' workflow(s) in ' . self::GENERIC_TEMPLATE);
        echo "\n";

        // Get unique platform templates (exclude Generic itself)
        $platformTemplates = array_unique(array_filter(
            array_values(self::PLATFORM_TEMPLATES),
            fn(string $t) => $t !== self::GENERIC_TEMPLATE
        ));

        // If platform-filter is set, only sync to the matching template
        if ($platformFilter !== '') {
            $targetTemplate = self::PLATFORM_TEMPLATES[$platformFilter] ?? null;

            if ($targetTemplate === null || $targetTemplate === self::GENERIC_TEMPLATE) {
                $this->log('INFO', "Platform filter '{$platformFilter}' does not map to a non-generic template, skipping Phase 1.");
                return 0;
            }

            $platformTemplates = [$targetTemplate];
        }

        fprintf(STDERR, "%-45s | %s\n", 'Template / File', 'Status');
        fprintf(STDERR, "%s\n", str_repeat('-', 70));

        foreach ($platformTemplates as $templateRepo) {
            foreach ($genericWorkflows as $workflow) {
                $filename = $workflow['name'];
                $destPath = '.mokogitea/workflows/' . $filename;
                $label = "{$templateRepo}/{$filename}";

                // Get file content from Generic
                $sourceContent = $this->getFileContent(
                    $giteaUrl, $token, $org,
                    self::GENERIC_TEMPLATE, $destPath, $branch
                );

                if ($sourceContent === null) {
                    fprintf(STDERR, "%-45s | %s\n", $label, 'ERROR (read source)');
                    $this->errors++;
                    continue;
                }

                $commitMsg = "chore: sync {$filename} from " . self::GENERIC_TEMPLATE . " [skip ci]";

                $this->pushFile(
                    $giteaUrl, $token, $org, $templateRepo,
                    $destPath, $sourceContent, $branch, $commitMsg, $label
                );
            }
        }

        echo "\n";
        return 0;
    }

    /**
     * Phase 2: Sync platform template workflows to live repos based on manifest.platform.
     */
    private function syncTemplatesToRepos(
        string $giteaUrl,
        string $token,
        string $org,
        string $branch,
        string $platformFilter
    ): int {
        $this->log('INFO', '=== Phase 2: Sync Platform Templates → Live Repos ===');
        echo "\n";

        $repos = $this->fetchOrgRepos($giteaUrl, $token, $org);

        if ($repos === null) {
            return 1;
        }

        $this->log('INFO', 'Found ' . count($repos) . " repo(s) in \"{$org}\".");
        echo "\n";

        fprintf(STDERR, "%-45s | %s\n", 'Repo / File', 'Status');
        fprintf(STDERR, "%s\n", str_repeat('-', 70));

        // Cache template workflows to avoid repeated API calls
        $templateWorkflowCache = [];

        foreach ($repos as $repoFullName) {
            [, $repoName] = explode('/', $repoFullName, 2);

            // Skip template repos
            if (str_starts_with($repoName, 'Template-')) {
                continue;
            }

            // Read manifest.platform
            $platform = $this->getRepoPlatform($giteaUrl, $token, $org, $repoName, $branch);

            // Apply platform filter
            if ($platformFilter !== '' && $platform !== $platformFilter) {
                continue;
            }

            // Resolve template
            $templateRepo = self::PLATFORM_TEMPLATES[$platform] ?? self::DEFAULT_TEMPLATE;

            // Get workflows from the template (cached)
            if (!isset($templateWorkflowCache[$templateRepo])) {
                $workflows = $this->listWorkflows($giteaUrl, $token, $org, $templateRepo, $branch);

                if ($workflows === null) {
                    $this->log('WARN', "Could not list workflows from {$templateRepo}, falling back to " . self::GENERIC_TEMPLATE);
                    $workflows = $this->listWorkflows($giteaUrl, $token, $org, self::GENERIC_TEMPLATE, $branch);
                }

                $templateWorkflowCache[$templateRepo] = $workflows ?? [];
            }

            $workflows = $templateWorkflowCache[$templateRepo];

            if (count($workflows) === 0) {
                continue;
            }

            foreach ($workflows as $workflow) {
                $filename = $workflow['name'];
                $destPath = '.mokogitea/workflows/' . $filename;
                $label = "{$repoFullName}/{$filename}";

                // Get source content from template
                $sourceContent = $this->getFileContent(
                    $giteaUrl, $token, $org,
                    $templateRepo, $destPath, $branch
                );

                if ($sourceContent === null) {
                    fprintf(STDERR, "%-45s | %s\n", $label, 'ERROR (read source)');
                    $this->errors++;
                    continue;
                }

                $commitMsg = "chore: sync {$filename} from {$templateRepo} [skip ci]";

                $this->pushFile(
                    $giteaUrl, $token, $org, $repoName,
                    $destPath, $sourceContent, $branch, $commitMsg, $label
                );
            }
        }

        echo "\n";
        return 0;
    }

    /**
     * Push a file to a repo — create or update, skip if identical.
     */
    private function pushFile(
        string $giteaUrl,
        string $token,
        string $org,
        string $repoName,
        string $destPath,
        string $localContent,
        string $branch,
        string $commitMsg,
        string $label
    ): void {
        $existing = $this->apiRequest(
            $giteaUrl,
            $token,
            'GET',
            "/api/v1/repos/{$org}/{$repoName}/contents/"
                . "{$destPath}?ref={$branch}"
        );

        $encodedContent = base64_encode($localContent);

        if ($existing['code'] === 200) {
            $data = json_decode($existing['body'], true);
            $remoteSha = $data['sha'] ?? '';
            $remoteContent = base64_decode($data['content'] ?? '');

            if ($remoteContent === $localContent) {
                fprintf(STDERR, "%-45s | %s\n", $label, 'IDENTICAL (skipped)');
                $this->skipped++;
                return;
            }

            if ($this->dryRun) {
                fprintf(STDERR, "%-45s | %s\n", $label, 'WOULD UPDATE');
                $this->updated++;
                return;
            }

            $payload = json_encode([
                'content' => $encodedContent,
                'sha' => $remoteSha,
                'message' => $commitMsg,
                'branch' => $branch,
            ]);

            $response = $this->apiRequest(
                $giteaUrl,
                $token,
                'PUT',
                "/api/v1/repos/{$org}/{$repoName}/contents/" . $destPath,
                $payload
            );

            if ($response['code'] === 200) {
                fprintf(STDERR, "%-45s | %s\n", $label, 'UPDATED');
                $this->updated++;
            } else {
                fprintf(STDERR, "%-45s | %s\n", $label, "ERROR (HTTP {$response['code']})");
                $this->errors++;
            }
        } elseif ($existing['code'] === 404) {
            if ($this->dryRun) {
                fprintf(STDERR, "%-45s | %s\n", $label, 'WOULD CREATE');
                $this->created++;
                return;
            }

            $payload = json_encode([
                'content' => $encodedContent,
                'message' => $commitMsg,
                'branch' => $branch,
            ]);

            $response = $this->apiRequest(
                $giteaUrl,
                $token,
                'POST',
                "/api/v1/repos/{$org}/{$repoName}/contents/" . $destPath,
                $payload
            );

            if ($response['code'] === 201) {
                fprintf(STDERR, "%-45s | %s\n", $label, 'CREATED');
                $this->created++;
            } else {
                fprintf(STDERR, "%-45s | %s\n", $label, "ERROR (HTTP {$response['code']})");
                $this->errors++;
            }
        } else {
            fprintf(STDERR, "%-45s | %s\n", $label, "ERROR (HTTP {$existing['code']})");
            $this->errors++;
        }
    }

    /**
     * List workflow files in a repo's .mokogitea/workflows/ directory.
     */
    private function listWorkflows(
        string $giteaUrl,
        string $token,
        string $org,
        string $repoName,
        string $branch
    ): ?array {
        $response = $this->apiRequest(
            $giteaUrl,
            $token,
            'GET',
            "/api/v1/repos/{$org}/{$repoName}/contents/.mokogitea/workflows?ref={$branch}"
        );

        if ($response['code'] !== 200) {
            return null;
        }

        $data = json_decode($response['body'], true);

        if (!is_array($data)) {
            return null;
        }

        // Filter to only files (not directories)
        return array_values(array_filter($data, fn($item) => ($item['type'] ?? '') === 'file'));
    }

    /**
     * Get file content from a repo as a raw string.
     */
    private function getFileContent(
        string $giteaUrl,
        string $token,
        string $org,
        string $repoName,
        string $filePath,
        string $branch
    ): ?string {
        $response = $this->apiRequest(
            $giteaUrl,
            $token,
            'GET',
            "/api/v1/repos/{$org}/{$repoName}/contents/{$filePath}?ref={$branch}"
        );

        if ($response['code'] !== 200) {
            return null;
        }

        $data = json_decode($response['body'], true);

        if (!is_array($data) || !isset($data['content'])) {
            return null;
        }

        return base64_decode($data['content']);
    }

    /**
     * Read a repo's manifest.xml and extract the platform value.
     * Returns 'generic' if the manifest is missing or has no platform field.
     */
    private function getRepoPlatform(
        string $giteaUrl,
        string $token,
        string $org,
        string $repoName,
        string $branch
    ): string {
        $response = $this->apiRequest(
            $giteaUrl,
            $token,
            'GET',
            "/api/v1/repos/{$org}/{$repoName}/contents/.mokogitea/manifest.xml?ref={$branch}"
        );

        if ($response['code'] !== 200) {
            return 'generic';
        }

        $data = json_decode($response['body'], true);

        if (!is_array($data) || !isset($data['content'])) {
            return 'generic';
        }

        $xmlContent = base64_decode($data['content']);

        if ($xmlContent === false || $xmlContent === '') {
            return 'generic';
        }

        // Suppress XML warnings for malformed manifests
        $previous = libxml_use_internal_errors(true);
        $xml = simplexml_load_string($xmlContent);
        libxml_use_internal_errors($previous);

        if ($xml === false) {
            return 'generic';
        }

        // Try <governance><platform> (standard location)
        $platform = '';

        // Register namespace if present
        $namespaces = $xml->getNamespaces(true);

        if (!empty($namespaces)) {
            $ns = reset($namespaces);
            $xml->registerXPathNamespace('mp', $ns);

            $nodes = $xml->xpath('//mp:governance/mp:platform');

            if (!empty($nodes)) {
                $platform = trim((string) $nodes[0]);
            }

            // Fallback: <identity><platform>
            if ($platform === '') {
                $nodes = $xml->xpath('//mp:identity/mp:platform');

                if (!empty($nodes)) {
                    $platform = trim((string) $nodes[0]);
                }
            }

            // Fallback: top-level <platform>
            if ($platform === '') {
                $nodes = $xml->xpath('//mp:platform');

                if (!empty($nodes)) {
                    $platform = trim((string) $nodes[0]);
                }
            }
        } else {
            // No namespace
            if (isset($xml->governance->platform)) {
                $platform = trim((string) $xml->governance->platform);
            } elseif (isset($xml->identity->platform)) {
                $platform = trim((string) $xml->identity->platform);
            } elseif (isset($xml->platform)) {
                $platform = trim((string) $xml->platform);
            }
        }

        if ($platform === '') {
            return 'generic';
        }

        return strtolower($platform);
    }

    /**
     * Fetch all non-archived repos in an org (paginated).
     */
    private function fetchOrgRepos(string $giteaUrl, string $token, string $org): ?array
    {
        $this->log('INFO', "Fetching repos from org: {$org}");

        $page = 1;
        $repos = [];

        while (true) {
            $response = $this->apiRequest(
                $giteaUrl,
                $token,
                'GET',
                "/api/v1/orgs/{$org}/repos?"
                    . "limit=50&page={$page}"
            );

            if ($response['code'] < 200 || $response['code'] >= 300) {
                if ($page === 1) {
                    $this->log('ERROR', "Could not fetch repos "
                        . "(HTTP {$response['code']}).");
                    return null;
                }

                break;
            }

            $data = json_decode($response['body'], true);

            if (!is_array($data) || count($data) === 0) {
                break;
            }

            foreach ($data as $repo) {
                if (!empty($repo['archived'])) {
                    continue;
                }

                $fullName = $repo['full_name'] ?? '';

                if ($fullName !== '') {
                    $repos[] = $fullName;
                }
            }

            $page++;
        }

        return $repos;
    }

    /**
     * Make an HTTP request to the Gitea API.
     */
    private function apiRequest(
        string $giteaUrl,
        string $token,
        string $method,
        string $endpoint,
        ?string $body = null
    ): array {
        $url = $giteaUrl . $endpoint;

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: application/json',
            'Accept: application/json',
            "Authorization: token {$token}",
        ]);

        if ($body !== null) {
            curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
        }

        $responseBody = curl_exec($ch);
        $httpCode = (int) curl_getinfo(
            $ch,
            CURLINFO_HTTP_CODE
        );

        if (curl_errno($ch)) {
            $error = curl_error($ch);
            curl_close($ch);

            return [
                'code' => 0,
                'body' => "cURL error: {$error}",
            ];
        }

        curl_close($ch);

        return ['code' => $httpCode, 'body' => $responseBody];
    }
}

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