<?php

declare(strict_types=1);

namespace LIT\MCP;

use LIT\MCP\Abilities\AbilityRegistrar;
use LIT\MCP\Abilities\ExposurePolicy;
use LIT\MCP\Abilities\ToolAvailability;
use LIT\MCP\Admin\AccessTab;
use LIT\MCP\Admin\AdminNotices;
use LIT\MCP\Admin\ConnectionRepository;
use LIT\MCP\Admin\ConnectionStatus;
use LIT\MCP\Admin\ConnectionTab;
use LIT\MCP\Admin\ConnectionUsage;
use LIT\MCP\Admin\LimitsTab;
use LIT\MCP\Admin\LogTab;
use LIT\MCP\Admin\SettingsPage;
use LIT\MCP\Admin\SiteHealth;
use LIT\MCP\Admin\ToolsTab;
use LIT\MCP\ChangeLog\ChangeLog;
use LIT\MCP\ChangeLog\ChangeLogCleanup;
use LIT\MCP\ChangeLog\ChangeLogInstaller;
use LIT\MCP\Guides\InstructionsBuilder;
use LIT\MCP\Integrations\Core\CoreIntegration;
use LIT\MCP\Integrations\Divi\DiviIntegration;
use LIT\MCP\Integrations\Divi\Release\DiviFeatureGate;
use LIT\MCP\Integrations\IntegrationRegistry;
use LIT\MCP\Integrations\Media\MediaIntegration;
use LIT\MCP\Integrations\Pods\PodsFieldSource;
use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
use LIT\MCP\Integrations\WordPress\Schema\RegisteredMetaSource;
use LIT\MCP\Integrations\WordPress\Schema\SampledMetaSource;
use LIT\MCP\Integrations\WordPress\WordPressIntegration;
use LIT\MCP\Server\AuthorizeGate;
use LIT\MCP\Server\DiscoveryCanonical;
use LIT\MCP\Server\RequestContext;
use LIT\MCP\Server\ServerRegistrar;
use LIT\MCP\Server\VisibilityFilter;
use LIT\MCP\Updater\GiteaUpdater;
use LIT\MCP\Updater\RecheckOnInstall;

defined('ABSPATH') || exit;

/**
 * Wires WP-LIT-MCP into WordPress.
 */
final class Plugin
{
    public const VERSION = '1.1.0';

    private static string $pluginFile = '';
    private static ?SettingsPage $settingsPage = null;

    public static function boot(string $pluginFile): void
    {
        self::$pluginFile = $pluginFile;

        // Before the dependency check: a plugin that is inactive for a missing dependency must still be updatable.
        (new GiteaUpdater(plugin_basename($pluginFile), dirname($pluginFile)))->register();
        (new RecheckOnInstall(self::VERSION))->register();

        $missing = (new Dependencies())->missing();
        if ($missing !== []) {
            self::noticeMissing($missing);
            return;
        }

        $access = new Access();
        $access->register();
        (new RequestContext())->register();
        (new VisibilityFilter())->register();
        (new DiscoveryCanonical())->register();
        (new AuthorizeGate())->register();

        $limits = new Limits();
        $changeLog = new ChangeLog();
        (new ChangeLogInstaller($changeLog))->maybeInstall();
        (new ChangeLogCleanup($changeLog, $limits))->register();

        $schema = self::contentSchema();
        $tools = new ToolAvailability();
        $registry = self::integrations($schema, $changeLog, $limits, $tools);
        $policy = ExposurePolicy::fromOption()->withGroups($registry->groupMap(...));
        $tools->bind($registry, $policy);
        // Integration-owned hooks (Divi: upgrader hook, check route, CLI command, tab "Divi") – before the settings
        // page reads its tabs.
        $registry->boot();

        (new AbilityRegistrar(
            $registry,
            $policy,
            [new DiviFeatureGate($changeLog)]
        ))->register();
        (new ServerRegistrar(
            $registry,
            new InstructionsBuilder($registry, static fn (): array => $schema->postTypeNames(), $policy),
            null,
            null,
            null,
            $policy
        ))->register();

        $status = new ConnectionStatus();
        (new SiteHealth($status))->register();
        $tabs = [
            new ConnectionTab($status),
            new AccessTab($access, new ConnectionRepository()),
            new ToolsTab($registry, $policy),
            new LogTab($changeLog, $limits, $registry),
            new LimitsTab(),
        ];
        self::$settingsPage = new SettingsPage(
            $tabs,
            plugins_url('assets/img/loosen-it-logo.svg', self::$pluginFile),
            plugins_url('assets', self::$pluginFile),
            self::VERSION
        );
        (new ConnectionUsage())->register();
        if (is_admin()) {
            self::$settingsPage->register();
            (new AdminNotices($status))->register();
        }

        \WPMedia\MCP\OAuth\Bootstrap::instance();
    }

    /**
     * The integrations in registry order – the order of the Tools tab, the guide and the server instructions. The
     * Divi integration and its groups share $tools, which Plugin binds once registry and policy exist.
     *
     * @internal Public for PluginTest only.
     */
    public static function integrations(
        ContentSchema $schema,
        ChangeLog $changeLog,
        Limits $limits,
        ToolAvailability $tools
    ): IntegrationRegistry {
        // E3: lit-site-status and the Divi tab name the tools each feature affects; the registry exists only after
        // the Divi integration, so it is asked at call time.
        $registry = null;
        $allAbilities = static function () use (&$registry): array {
            return $registry instanceof IntegrationRegistry ? $registry->abilities() : [];
        };
        $divi = new DiviIntegration($schema, $changeLog, $tools, $allAbilities);

        $registry = new IntegrationRegistry(
            new CoreIntegration(self::pluginDir() . '/docs/guides', [$divi->environmentComponent()]),
            new WordPressIntegration(
                $schema,
                $changeLog,
                $divi->contentComposer(),
                $divi->libraryIdsVisible(...),
                $divi->builderDetector()
            ),
            new MediaIntegration($schema, $changeLog, $limits, $divi->mediaUsageSources()),
            $divi,
            $divi->library(),
            $divi->themeBuilder()
        );

        return $registry;
    }

    public static function settingsPage(): ?SettingsPage
    {
        return self::$settingsPage;
    }

    public static function pluginDir(): string
    {
        return dirname(self::$pluginFile);
    }

    /**
     * @param list<string> $missing
     */
    public static function noticeMissing(array $missing): void
    {
        add_action('admin_notices', static function () use ($missing): void {
            printf(
                '<div class="notice notice-error"><p>%s</p></div>',
                esc_html(sprintf(
                    /* translators: %s: comma separated list of missing components */
                    __('WP-LIT-MCP ist inaktiv. Es fehlt: %s', 'wp-lit-mcp'),
                    implode(', ', $missing)
                ))
            );
        });
    }

    private static function contentSchema(): ContentSchema
    {
        // Pods active but unusable: its meta keys (sampled, or registered via Pods' register_meta integration) must not
        // be written past Pods.
        $podsUnusable = defined('PODS_VERSION') && ! PodsFieldSource::isAvailable();
        $sources = [new RegisteredMetaSource(readOnly: $podsUnusable), new SampledMetaSource(readOnly: $podsUnusable)];
        if (PodsFieldSource::isAvailable()) {
            array_unshift($sources, new PodsFieldSource());
        }

        // Divi's post types and builder check come in statically: the schema exists before the Divi integration.
        return new ContentSchema(
            $sources,
            DiviIntegration::builderEnabledFor(...),
            DiviIntegration::internalPostTypes()
        );
    }
}