<?php

namespace Tests\Unit;

use App\Contracts\IceCandidateProviderInterface;
use App\DTOs\IceCandidatesDto;
use App\Services\IceCandidate\IceCandidateManager;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;
use RuntimeException;
use Tests\TestCase;

class IceCandidateManagerTest extends TestCase
{
    protected function setUp(): void
    {
        parent::setUp();
        Cache::flush();
        $this->app->forgetInstance(IceCandidateManager::class);
    }

    public function test_manager_resolves_metered_as_default_driver(): void
    {
        Http::fake([
            '*metered*' => Http::response([
                ['urls' => 'stun:stun.relay.metered.ca:80'],
            ], 200),
        ]);

        $manager = app(IceCandidateManager::class);
        $candidates = $manager->getIceCandidates();

        $this->assertCount(1, $candidates);
        $this->assertEquals('stun:stun.relay.metered.ca:80', $candidates->toArray()[0]['urls']);
    }

    public function test_manager_resolves_convexsol_when_configured(): void
    {
        config([
            'services.ice.default' => 'convexsol',
            'services.ice.providers.convexsol' => [
                'username' => 'convex_usr',
                'password' => 'convex_pwd',
                'turn_urls' => ['turn:turn.convexsol.com:3478'],
                'stun_urls' => ['stun:turn.convexsol.com:3478'],
            ],
        ]);

        $manager = app(IceCandidateManager::class);
        $candidates = $manager->getIceCandidates();

        $this->assertCount(2, $candidates);
        $array = $candidates->toArray();
        $this->assertEquals('convex_usr', $array[1]['username']);
        $this->assertEquals('convex_pwd', $array[1]['credential']);
    }

    public function test_manager_falls_back_and_logs_warning_when_primary_fails(): void
    {
        Log::shouldReceive('warning')
            ->once()
            ->withArgs(function ($message, $context) {
                return str_contains($message, 'Primary ICE candidate provider [metered] failed') &&
                    $context['primary_driver'] === 'metered' &&
                    $context['fallback_driver'] === 'convexsol';
            });

        // Fail primary Metered HTTP request
        Http::fake([
            '*metered*' => Http::response('Gateway Error', 502),
        ]);

        config([
            'services.ice.default' => 'metered',
            'services.ice.fallback' => 'convexsol',
            'services.ice.providers.convexsol' => [
                'username' => 'fallback_user',
                'password' => 'fallback_password',
                'turn_urls' => ['turn:turn.convexsol.com:3478'],
                'stun_urls' => ['stun:turn.convexsol.com:3478'],
            ],
        ]);

        $manager = app(IceCandidateManager::class);
        $candidates = $manager->getIceCandidates();

        $this->assertCount(2, $candidates);
        $array = $candidates->toArray();
        $this->assertEquals('fallback_user', $array[1]['username']);
    }

    public function test_manager_falls_back_to_default_stun_and_logs_error_when_both_fail(): void
    {
        Log::shouldReceive('warning')->once();
        Log::shouldReceive('error')
            ->once()
            ->withArgs(function ($message) {
                return str_contains($message, 'Fallback ICE candidate provider [convexsol] also failed');
            });

        // Fail primary Metered HTTP request
        Http::fake([
            '*metered*' => Http::response('Gateway Error', 502),
        ]);

        $manager = app(IceCandidateManager::class);
        $manager->extend('convexsol', function () {
            return new class implements IceCandidateProviderInterface
            {
                public function getIceCandidates(): IceCandidatesDto
                {
                    throw new RuntimeException('ConvexSol Server Error');
                }
            };
        });

        config([
            'services.ice.default' => 'metered',
            'services.ice.fallback' => 'convexsol',
        ]);

        $candidates = $manager->getIceCandidates();

        $this->assertCount(1, $candidates);
        $this->assertContains('stun:stun.l.google.com:19302', $candidates->toArray()[0]['urls']);
    }

    public function test_container_resolves_interface_to_manager(): void
    {
        $resolved = app(IceCandidateProviderInterface::class);
        $this->assertInstanceOf(IceCandidateManager::class, $resolved);
    }
}