<?php

declare(strict_types=1);

namespace Monitor\Api\Tests;

use Monitor\Api\Application;
use Monitor\Api\Config;
use Monitor\Api\Db\Database;
use Monitor\Api\Http\Request;
use PHPUnit\Framework\TestCase;

final class ApplicationTest extends TestCase
{
    private Application $app;

    protected function setUp(): void
    {
        $config = new Config(['MONITOR_ADMIN_API_KEY' => 'admin-secret', 'MONITOR_STATUS_FILE' => '/does/not/exist']);
        $this->app = new Application(Database::inMemory(), $config);
    }

    public function testUnknownRouteReturns404(): void
    {
        $response = $this->app->handle(Request::create('GET', '/nope'));

        self::assertSame(404, $response->status);
    }

    public function testWrongMethodReturns405(): void
    {
        $response = $this->app->handle(Request::create('DELETE', '/api/v1/tickets'));

        self::assertSame(405, $response->status);
    }

    public function testWritingWithoutAgentKeyReturns401(): void
    {
        $response = $this->app->handle(Request::create('POST', '/api/v1/tickets', body: ['title' => 'X']));

        self::assertSame(401, $response->status);
    }

    public function testRegisterAgentRequiresAdminKey(): void
    {
        $response = $this->app->handle(Request::create('POST', '/api/v1/agents', body: [
            'display_name' => 'Alice', 'role' => 'entwickler',
        ]));

        self::assertSame(401, $response->status);
    }

    public function testFullFlowRegisterAgentThenCreateTicket(): void
    {
        $registerResponse = $this->app->handle(Request::create(
            'POST',
            '/api/v1/agents',
            body: ['display_name' => 'Alice', 'role' => 'entwickler'],
            headers: ['X-Admin-Key' => 'admin-secret']
        ));
        self::assertSame(201, $registerResponse->status);
        $apiKey = $registerResponse->body()['api_key'];

        $createResponse = $this->app->handle(Request::create(
            'POST',
            '/api/v1/tickets',
            body: ['title' => 'Neues Ticket'],
            headers: ['X-Api-Key' => $apiKey]
        ));
        self::assertSame(201, $createResponse->status);

        $listResponse = $this->app->handle(Request::create('GET', '/api/v1/tickets'));
        self::assertCount(1, $listResponse->body()['tickets']);
    }

    /**
     * Regression: Ein unbekanntes Ticket lief bis in die FOREIGN-KEY-Constraint und kam als
     * ungefangene PDOException samt Stacktrace beim Client an.
     */
    public function testActivityWithUnknownTicketReturns422WithoutInternals(): void
    {
        $registerResponse = $this->app->handle(Request::create(
            'POST',
            '/api/v1/agents',
            body: ['display_name' => 'Alice', 'role' => 'entwickler'],
            headers: ['X-Admin-Key' => 'admin-secret']
        ));
        $apiKey = $registerResponse->body()['api_key'];
        $agentId = $registerResponse->body()['agent']['id'];

        $response = $this->app->handle(Request::create(
            'POST',
            '/api/v1/agents/' . $agentId . '/activity',
            body: ['state' => 'working', 'current_ticket' => 999],
            headers: ['X-Api-Key' => $apiKey]
        ));

        self::assertSame(422, $response->status);
        self::assertStringNotContainsString('PDOException', json_encode($response->body()));
    }

    public function testPatchUnknownTicketReturns404(): void
    {
        $registerResponse = $this->app->handle(Request::create(
            'POST',
            '/api/v1/agents',
            body: ['display_name' => 'Alice', 'role' => 'entwickler'],
            headers: ['X-Admin-Key' => 'admin-secret']
        ));
        $apiKey = $registerResponse->body()['api_key'];

        $response = $this->app->handle(Request::create(
            'PATCH',
            '/api/v1/tickets/999',
            body: ['column' => 'bereit'],
            headers: ['X-Api-Key' => $apiKey]
        ));

        self::assertSame(404, $response->status);
    }

    /**
     * Issue #27: die Projektliste des Codeberg-Sync ist ueber ein Modal im Frontend
     * editierbar - lesend oeffentlich (fuer das Modal beim Oeffnen), schreibend hinter dem
     * Admin-Key wie die Agenten-Registrierung.
     */
    public function testRepoConfigsIndexIsPublic(): void
    {
        $response = $this->app->handle(Request::create('GET', '/api/v1/repo-configs'));

        self::assertSame(200, $response->status);
        self::assertIsArray($response->body()['repos']);
    }

    /**
     * Der X-Admin-Key-Header macht aus dem fetch() im Projekte-Modal einen preflighted
     * request. Wird OPTIONS nicht mit 2xx beantwortet, sendet der Browser den POST nie und
     * das Modal zeigt nur "Netzwerkfehler beim Abrufen der Ressource".
     */
    public function testCorsPreflightOnAdminEndpointSucceeds(): void
    {
        $response = $this->app->handle(Request::create('OPTIONS', '/api/v1/repo-configs'));

        self::assertSame(204, $response->status);
    }

    public function testCreateRepoConfigRequiresAdminKey(): void
    {
        $response = $this->app->handle(Request::create('POST', '/api/v1/repo-configs', body: [
            'owner' => 'fds2610', 'repo' => 'monitor', 'color' => '#fbca04',
        ]));

        self::assertSame(401, $response->status);
    }

    public function testFullFlowCreateUpdateAndDeleteRepoConfigWithAdminKey(): void
    {
        // Bewusst ein Repo, das die Migration nicht schon geseedet hat (monitor/Steuerkram/
        // nc-gantt, siehe 003_repo_configs.sql) - sonst scheitert schon das Anlegen an der
        // Dublettenpruefung, und der eigentliche Ablauf wird gar nicht geprueft.
        $createResponse = $this->app->handle(Request::create(
            'POST',
            '/api/v1/repo-configs',
            body: ['owner' => 'fds2610', 'repo' => 'weiteres-projekt', 'color' => '#fbca04'],
            headers: ['X-Admin-Key' => 'admin-secret']
        ));
        self::assertSame(201, $createResponse->status);
        $id = $createResponse->body()['repo']['id'];

        $updateResponse = $this->app->handle(Request::create(
            'PATCH',
            '/api/v1/repo-configs/' . $id,
            body: ['owner' => 'fds2610', 'repo' => 'weiteres-projekt', 'color' => '#000000'],
            headers: ['X-Admin-Key' => 'admin-secret']
        ));
        self::assertSame(200, $updateResponse->status);
        self::assertSame('#000000', $updateResponse->body()['repo']['color']);

        $deleteResponse = $this->app->handle(Request::create(
            'DELETE',
            '/api/v1/repo-configs/' . $id,
            headers: ['X-Admin-Key' => 'admin-secret']
        ));
        self::assertSame(200, $deleteResponse->status);

        $listResponse = $this->app->handle(Request::create('GET', '/api/v1/repo-configs'));
        self::assertSame([], array_filter(
            $listResponse->body()['repos'],
            static fn (array $r): bool => (int) $r['id'] === (int) $id
        ));
    }

    /**
     * Der SSE-Endpoint (F13) ist wie die anderen GET-Endpunkte oeffentlich und liefert eine
     * Stream-Antwort - der eigentliche Polling-Loop wird hier bewusst NICHT ausgefuehrt
     * (siehe StreamControllerTest fuer die Schleifenlogik selbst), das wuerde echte sleep()-
     * Aufrufe ausloesen.
     */
    public function testStreamRouteIsPublicAndReturnsAStreamResponse(): void
    {
        $response = $this->app->handle(Request::create('GET', '/api/v1/stream'));

        self::assertSame(200, $response->status);
        self::assertTrue($response->isStream());
    }

    /**
     * Der Webhook-Endpunkt ist aus dem Internet erreichbar - ohne gueltige Signatur darf er
     * nichts ausloesen. Die setUp()-Config setzt kein CODEBERG_WEBHOOK_SECRET, also weist
     * er hier grundsaetzlich ab (siehe WebhookAuthenticatorTest fuer die Signaturlogik).
     */
    public function testCodebergWebhookWithoutSignatureReturns401(): void
    {
        $response = $this->app->handle(Request::create(
            'POST',
            '/api/v1/webhooks/codeberg',
            rawBody: '{"action":"opened"}'
        ));

        self::assertSame(401, $response->status);
    }

    public function testCodebergWebhookWithValidSignatureIsAccepted(): void
    {
        $payload = '{"action":"opened","issue":{"number":1}}';
        $triggerPath = sys_get_temp_dir() . '/monitor-app-webhook-' . uniqid() . '/sync-requested';
        $hooksPath = sys_get_temp_dir() . '/monitor-app-webhook-' . uniqid() . '/hooks-count';

        $app = new Application(Database::inMemory(), new Config([
            'MONITOR_STATUS_FILE' => '/does/not/exist',
            'CODEBERG_WEBHOOK_SECRET' => 'webhook-secret',
            'MONITOR_SYNC_TRIGGER_FILE' => $triggerPath,
            'MONITOR_HOOKS_COUNTER_FILE' => $hooksPath,
        ]));

        $response = $app->handle(Request::create(
            'POST',
            '/api/v1/webhooks/codeberg',
            headers: ['X-Forgejo-Signature' => hash_hmac('sha256', $payload, 'webhook-secret')],
            rawBody: $payload
        ));

        self::assertSame(202, $response->status);
        self::assertFileExists($triggerPath);

        unlink($triggerPath);
        rmdir(dirname($triggerPath));
        unlink($hooksPath);
        rmdir(dirname($hooksPath));
    }

    /**
     * Hooks-KPI (Issue #38): oeffentlich wie die anderen GET-Endpunkte, zaehlt akzeptierte
     * Webhook-Zustellungen unabhaengig vom Event-Typ.
     */
    public function testWebhookStatsRouteIsPublicAndCountsAcceptedWebhooks(): void
    {
        $payload = '{"action":"opened","issue":{"number":1}}';
        $triggerPath = sys_get_temp_dir() . '/monitor-app-webhook-stats-' . uniqid() . '/sync-requested';
        $hooksPath = sys_get_temp_dir() . '/monitor-app-webhook-stats-' . uniqid() . '/hooks-count';

        $app = new Application(Database::inMemory(), new Config([
            'MONITOR_STATUS_FILE' => '/does/not/exist',
            'CODEBERG_WEBHOOK_SECRET' => 'webhook-secret',
            'MONITOR_SYNC_TRIGGER_FILE' => $triggerPath,
            'MONITOR_HOOKS_COUNTER_FILE' => $hooksPath,
        ]));

        $emptyStatsResponse = $app->handle(Request::create('GET', '/api/v1/webhooks/stats'));
        self::assertSame(200, $emptyStatsResponse->status);
        self::assertSame(0, $emptyStatsResponse->body()['count']);

        $app->handle(Request::create(
            'POST',
            '/api/v1/webhooks/codeberg',
            headers: ['X-Forgejo-Signature' => hash_hmac('sha256', $payload, 'webhook-secret')],
            rawBody: $payload
        ));

        $statsResponse = $app->handle(Request::create('GET', '/api/v1/webhooks/stats'));
        self::assertSame(1, $statsResponse->body()['count']);

        unlink($triggerPath);
        rmdir(dirname($triggerPath));
        unlink($hooksPath);
        rmdir(dirname($hooksPath));
    }
}