<?php

declare(strict_types=1);

namespace Tests\Unit;

uses(\Tests\TestCase::class);

use App\Http\Controllers\SamlIdpController;
use App\Models\{ConnectedApp, ConnectionStatus, User};
use App\Services\SamlIdpService;
use Exception;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Mockery;

beforeEach(function (): void {
    $this->mockService = Mockery::mock(SamlIdpService::class);
    $this->controller = new SamlIdpController($this->mockService);
});

afterEach(function (): void {
    Mockery::close();
});

test('sso throws 400 bad request when SAMLRequest is empty', function (): void {
    $request = Request::create('/saml/sso', 'GET');

    expect(fn () => $this->controller->sso($request))
        ->toThrow(\Symfony\Component\HttpKernel\Exception\HttpException::class, 'Missing SAMLRequest parameter.');
});

test('sso throws 400 bad request when SAMLRequest fails to parse', function (): void {
    $request = Request::create('/saml/sso', 'GET', ['SAMLRequest' => 'invalid-base64']);

    $this->mockService->shouldReceive('parseRequest')
        ->once()
        ->with('invalid-base64')
        ->andThrow(new Exception('SAML XML parsing error.'));

    expect(fn () => $this->controller->sso($request))
        ->toThrow(\Symfony\Component\HttpKernel\Exception\HttpException::class, 'Invalid SAMLRequest: SAML XML parsing error.');
});

test('sso throws 403 forbidden when Service Provider is unregistered', function (): void {
    $request = Request::create('/saml/sso', 'GET', ['SAMLRequest' => 'valid-request']);

    $this->mockService->shouldReceive('parseRequest')
        ->once()
        ->with('valid-request')
        ->andReturn([
            'requestId' => '_req_1',
            'issuer' => 'urn:unregistered',
            'acsUrl' => 'https://acs.url',
        ]);

    $this->mockService->shouldReceive('findConnectedApp')
        ->once()
        ->with('urn:unregistered')
        ->andReturn(null);

    expect(fn () => $this->controller->sso($request))
        ->toThrow(\Symfony\Component\HttpKernel\Exception\HttpException::class, 'The Service Provider [urn:unregistered] is not authorized in this system.');
});

test('sso throws 403 forbidden when Service Provider is registered but disconnected', function (): void {
    $request = Request::create('/saml/sso', 'GET', ['SAMLRequest' => 'valid-request']);

    $status = new ConnectionStatus();
    $status->name = 'disconnected';

    $app = new ConnectedApp();
    $app->name = 'Test Disconnected App';
    $app->setRelation('status', $status);

    $this->mockService->shouldReceive('parseRequest')
        ->once()
        ->with('valid-request')
        ->andReturn([
            'requestId' => '_req_1',
            'issuer' => 'urn:disconnected',
            'acsUrl' => 'https://acs.url',
        ]);

    $this->mockService->shouldReceive('findConnectedApp')
        ->once()
        ->with('urn:disconnected')
        ->andReturn($app);

    expect(fn () => $this->controller->sso($request))
        ->toThrow(\Symfony\Component\HttpKernel\Exception\HttpException::class, 'The Service Provider [Test Disconnected App] is currently deactivated.');
});

test('sso redirects guest user to login page and stores SAML parameters in session', function (): void {
    $request = Request::create('/saml/sso', 'GET', [
        'SAMLRequest' => 'valid-request',
        'RelayState' => 'https://relay.state',
    ]);

    $status = new ConnectionStatus();
    $status->name = 'connected';

    $app = new ConnectedApp();
    $app->name = 'Active SAML App';
    $app->setRelation('status', $status);
    $app->settings = ['saml' => ['acs_url' => 'https://acs.url']];

    $this->mockService->shouldReceive('parseRequest')
        ->once()
        ->with('valid-request')
        ->andReturn([
            'requestId' => '_req_1',
            'issuer' => 'urn:active',
            'acsUrl' => 'https://acs.url',
        ]);

    $this->mockService->shouldReceive('findConnectedApp')
        ->once()
        ->with('urn:active')
        ->andReturn($app);

    // Mock guest Auth state
    Auth::shouldReceive('check')->once()->andReturn(false);

    $response = $this->controller->sso($request);

    expect($response->isRedirect(route('login')))->toBeTrue()
        ->and(session('saml_pending_request'))->toBe('valid-request')
        ->and(session('saml_pending_relay_state'))->toBe('https://relay.state');
});

test('sso generates SAML Response and auto-submitting POST view for authenticated user', function (): void {
    $request = Request::create('/saml/sso', 'GET', [
        'SAMLRequest' => 'valid-request',
        'RelayState' => 'https://relay.state',
    ]);

    $status = new ConnectionStatus();
    $status->name = 'connected';

    $app = new ConnectedApp();
    $app->name = 'Active SAML App';
    $app->setRelation('status', $status);
    $app->settings = ['saml' => ['acs_url' => 'https://acs.url']];

    $user = new User();
    $user->email = 'activeuser@sso.local';

    $this->mockService->shouldReceive('parseRequest')
        ->once()
        ->with('valid-request')
        ->andReturn([
            'requestId' => '_req_1',
            'issuer' => 'urn:active',
            'acsUrl' => 'https://acs.url',
        ]);

    $this->mockService->shouldReceive('findConnectedApp')
        ->once()
        ->with('urn:active')
        ->andReturn($app);

    // Mock authenticated Auth state
    Auth::shouldReceive('check')->once()->andReturn(true);
    Auth::shouldReceive('user')->once()->andReturn($user);

    $this->mockService->shouldReceive('generateResponse')
        ->once()
        ->with($user, $app, '_req_1', 'https://acs.url')
        ->andReturn('base64-signed-saml-response-xml-payload');

    // Populate session to assert it gets cleared
    session([
        'saml_pending_request' => 'valid-request',
        'saml_pending_relay_state' => 'https://relay.state',
    ]);

    $view = $this->controller->sso($request);

    expect($view->name())->toBe('saml.post_response')
        ->and($view->getData()['appName'])->toBe('Active SAML App')
        ->and($view->getData()['acsUrl'])->toBe('https://acs.url')
        ->and($view->getData()['samlResponse'])->toBe('base64-signed-saml-response-xml-payload')
        ->and($view->getData()['relayState'])->toBe('https://relay.state')
        ->and(session('saml_pending_request'))->toBeNull()
        ->and(session('saml_pending_relay_state'))->toBeNull();
});

test('metadata returns XML response containing clean endpoints', function (): void {
    $this->mockService->shouldReceive('generateMetadata')
        ->once()
        ->with(route('saml.metadata'), route('saml.sso'))
        ->andReturn('<EntityDescriptor></EntityDescriptor>');

    $response = $this->controller->metadata();

    expect($response->getStatusCode())->toBe(200)
        ->and($response->headers->get('Content-Type'))->toBe('application/xml; charset=utf-8')
        ->and($response->getContent())->toBe('<EntityDescriptor></EntityDescriptor>');
});