#!/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.Maintenance
 * INGROUP: MokoStandards
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /maintenance/repo_inventory.php
 * BRIEF: Generate a live inventory dashboard of all governed repos as a GitHub issue
 *
 * USAGE
 *   php maintenance/repo_inventory.php                    # Generate and post dashboard
 *   php maintenance/repo_inventory.php --dry-run          # Preview only
 *   php maintenance/repo_inventory.php --json             # JSON output to stdout
 */

declare(strict_types=1);

$dryRun  = in_array('--dry-run', $argv);
$jsonOut = in_array('--json', $argv);

$org = 'mokoconsulting-tech';
foreach ($argv as $i => $arg) {
	if ($arg === '--org' && isset($argv[$i + 1])) { $org = $argv[$i + 1]; }
}

$config = \MokoEnterprise\Config::load();
try {
	$_adapter = \MokoEnterprise\PlatformAdapterFactory::create($config);
	$_api     = $_adapter->getApiClient();
} catch (\Exception $e) {
	fwrite(STDERR, "Platform init failed: " . $e->getMessage() . "\n");
	exit(1);
}
$token = $config->getString('platform', 'gitea') === 'gitea'
	? $config->getString('gitea.token', '')
	: $config->getString('github.token', '');

$ALWAYS_EXCLUDE = ['MokoStandards', '.github-private'];

/**
 * @return array{int, array<string, mixed>}
 */
function ghApi(string $method, string $path, ?array $body, string $token): array
{
	global $_api;
	try {
		$result = match ($method) {
			'GET'    => $_api->get("/{$path}"),
			'POST'   => $_api->post("/{$path}", $body ?? []),
			'PATCH'  => $_api->patch("/{$path}", $body ?? []),
			'PUT'    => $_api->put("/{$path}", $body ?? []),
			'DELETE' => $_api->delete("/{$path}"),
			default  => throw new \RuntimeException("Unsupported method: {$method}"),
		};
		return [200, $result];
	} catch (\Exception $e) {
		return [500, ['message' => $e->getMessage()]];
	}
}

/**
 * GitHub GraphQL helper.
 *
 * @return array<string, mixed>
 */
function graphql(string $query, array $variables, string $token): array
{
	global $config;
	$pf = isset($config) ? $config->getString('platform', 'gitea') : 'gitea';
	if ($pf !== 'github') {
		return [];
	}
	$payload = json_encode(['query' => $query, 'variables' => $variables]);
	$ch = curl_init('https://api.github.com/graphql');
	curl_setopt_array($ch, [
		CURLOPT_RETURNTRANSFER => true,
		CURLOPT_POST           => true,
		CURLOPT_POSTFIELDS     => $payload,
		CURLOPT_HTTPHEADER     => [
			'Authorization: bearer ' . $token,
			'Content-Type: application/json',
			'User-Agent: MokoStandards-Inventory',
		],
	]);
	$body = (string) curl_exec($ch);
	curl_close($ch);
	return json_decode($body, true)['data'] ?? [];
}

// ── Fetch all repos ─────────────────────────────────────────────────────
if (!$jsonOut) { echo "Fetching repositories from {$org}...\n"; }

$allRepos = [];
$page = 1;
do {
	[$_, $batch] = ghApi('GET', "orgs/{$org}/repos?per_page=100&page={$page}&type=all&sort=full_name", null, $token);
	$allRepos = array_merge($allRepos, $batch);
	$page++;
} while (count($batch) === 100);

if (!$jsonOut) { echo "Found " . count($allRepos) . " total repositories\n\n"; }

// ── Build inventory ─────────────────────────────────────────────────────
$inventory = [];

foreach ($allRepos as $repo) {
	$name = $repo['name'];
	if (in_array($name, $ALWAYS_EXCLUDE, true)) { continue; }

	$entry = [
		'name'        => $name,
		'visibility'  => $repo['private'] ? 'private' : 'public',
		'archived'    => $repo['archived'] ?? false,
		'platform'    => '-',
		'version'     => '-',
		'last_push'   => $repo['pushed_at'] ?? '-',
		'open_issues' => $repo['open_issues_count'] ?? 0,
		'has_project' => false,
		'rulesets'    => 0,
	];

	if ($entry['archived']) {
		$inventory[] = $entry;
		continue;
	}

	// Detect platform from .mokostandards
	foreach (['.github/.mokostandards', '.mokostandards'] as $path) {
		[$status, $data] = ghApi('GET', "repos/{$org}/{$name}/contents/{$path}", null, $token);
		if ($status === 200 && !empty($data['content'])) {
			$content = base64_decode($data['content']);
			if (preg_match('/^platform:\s*(.+)/m', $content, $m)) {
				$entry['platform'] = trim($m[1], " \t\n\r\"'");
			}
			if (preg_match('/^version:\s*(.+)/m', $content, $m)) {
				$entry['version'] = trim($m[1], " \t\n\r\"'");
			}
			break;
		}
	}

	// Check rulesets count
	[$status, $rulesets] = ghApi('GET', "repos/{$org}/{$name}/rulesets?per_page=100&includes_parents=true", null, $token);
	if ($status === 200 && is_array($rulesets)) {
		$entry['rulesets'] = count($rulesets);
	}

	// Check for GitHub Project
	$gql = graphql(
		'query($owner:String!,$name:String!){repository(owner:$owner,name:$name){projectsV2(first:1){totalCount}}}',
		['owner' => $org, 'name' => $name],
		$token
	);
	$entry['has_project'] = ($gql['repository']['projectsV2']['totalCount'] ?? 0) > 0;

	$inventory[] = $entry;

	if (!$jsonOut) {
		echo "  {$name}: {$entry['platform']} | v{$entry['version']} | rulesets:{$entry['rulesets']} | project:" . ($entry['has_project'] ? 'yes' : 'no') . "\n";
	}
}

// ── JSON output ─────────────────────────────────────────────────────────
if ($jsonOut) {
	echo json_encode($inventory, JSON_PRETTY_PRINT) . "\n";
	exit(0);
}

// ── Build dashboard ─────────────────────────────────────────────────────
$now       = gmdate('Y-m-d H:i:s') . ' UTC';
$active    = array_filter($inventory, fn($r) => !$r['archived']);
$archived  = array_filter($inventory, fn($r) => $r['archived']);
$withRules = count(array_filter($active, fn($r) => $r['rulesets'] >= 3));
$withProj  = count(array_filter($active, fn($r) => $r['has_project']));
$activeN   = count($active);
$archivedN = count($archived);

$rows = [];
foreach ($inventory as $r) {
	$vis  = $r['visibility'] === 'private' ? 'prv' : 'pub';
	$arch = $r['archived'] ? ' archived' : '';
	$proj = $r['has_project'] ? 'yes' : '-';
	$rs   = $r['archived'] ? '-' : ($r['rulesets'] >= 3 ? '3/3' : "{$r['rulesets']}/3");
	$rows[] = "| `{$r['name']}` | {$vis}{$arch} | {$r['platform']} | {$r['version']} | {$rs} | {$proj} | {$r['open_issues']} |";
}
$table = implode("\n", $rows);

$body = "## Repository Inventory Dashboard\n\n";
$body .= "**Organisation:** `{$org}`\n";
$body .= "**Generated:** {$now}\n";
$body .= "**Active:** {$activeN} | **Archived:** {$archivedN} | **Rulesets 3/3:** {$withRules} | **Projects:** {$withProj}\n\n";
$body .= "| Repository | Visibility | Platform | Version | Rulesets | Project | Issues |\n";
$body .= "|---|---|---|---|---|---|---|\n";
$body .= $table . "\n\n";
$body .= "---\n*Auto-generated by `repo_inventory.php`*\n";

echo "\n" . str_repeat('-', 50) . "\n";
echo "Active: {$activeN} | Archived: {$archivedN} | Rulesets 3/3: {$withRules} | Projects: {$withProj}\n";

// ── Post as issue ───────────────────────────────────────────────────────
if (!$dryRun) {
	$title = "dashboard: repository inventory ({$org})";
	[$_, $existing] = ghApi('GET', "repos/{$org}/MokoStandards/issues?labels=inventory&state=all&per_page=1&sort=created&direction=desc", null, $token);

	if (!empty($existing[0]['number'])) {
		$num = $existing[0]['number'];
		ghApi('PATCH', "repos/{$org}/MokoStandards/issues/{$num}", [
			'title' => $title, 'body' => $body, 'state' => 'open', 'assignees' => ['jmiller'],
		], $token);
		echo "Updated inventory issue #{$num}\n";
	} else {
		[$_, $issue] = ghApi('POST', "repos/{$org}/MokoStandards/issues", [
			'title' => $title, 'body' => $body,
			'labels' => ['inventory', 'type: chore', 'automation'],
			'assignees' => ['jmiller'],
		], $token);
		echo "Created inventory issue #{$issue['number']}\n";
	}
} else {
	echo "(dry-run) would post inventory dashboard issue\n";
}