<?php

use App\Models\InstanceSettings;
use App\Models\OauthIdentity;
use App\Models\OauthSetting;
use App\Models\User;
use App\Services\Auth\OauthLoginService;
use Illuminate\Database\UniqueConstraintViolationException;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Once;
use Laravel\Fortify\Features;
use Laravel\Socialite\Facades\Socialite;
use SocialiteProviders\Discord\Provider as DiscordProvider;
use Symfony\Component\HttpKernel\Exception\HttpException;

uses(RefreshDatabase::class);

beforeEach(function () {
    InstanceSettings::forceCreate([
        'id' => 0,
        'is_registration_enabled' => false,
    ]);

    Once::flush();

    OauthSetting::create([
        'provider' => 'google',
        'client_id' => 'client-id',
        'client_secret' => 'client-secret',
        'redirect_uri' => 'https://coolify.example.com/auth/google/callback',
        'tenant' => 'example.com',
        'enabled' => true,
    ]);
});

it('logs in an existing user when the oauth provider returns a mixed-case email', function () {
    config()->set('app.maintenance.driver', 'file');

    $user = User::factory()->create([
        'email' => 'username@example.edu',
    ]);

    $provider = Mockery::mock();
    $provider->shouldReceive('setConfig')->once()->andReturnSelf();
    $provider->shouldReceive('with')->once()->with(['hd' => 'example.com'])->andReturnSelf();
    $provider->shouldReceive('user')->once()->andReturn((object) [
        'email' => 'UserName@example.edu',
        'name' => 'Example User',
        'id' => 'google-user-id',
        'user' => ['verified_email' => true],
    ]);

    Socialite::shouldReceive('driver')->once()->with('google')->andReturn($provider);

    $response = $this->get(route('auth.callback', 'google'));

    $response->assertRedirect('/');
    $this->assertAuthenticatedAs($user);
    expect(User::count())->toBe(1);
    expect(OauthIdentity::where([
        'user_id' => $user->id,
        'provider' => 'google',
        'provider_user_id' => 'google-user-id',
    ])->exists())->toBeTrue();
});

it('never moves an existing oauth identity when the provider email changes', function () {
    config()->set('app.maintenance.driver', 'file');

    $identityOwner = User::factory()->create(['email' => 'old@example.com']);
    $otherUser = User::factory()->create(['email' => 'new@example.com']);
    $identity = OauthIdentity::create([
        'user_id' => $identityOwner->id,
        'provider' => 'google',
        'issuer' => 'google',
        'provider_user_id' => 'google-user-id',
        'email' => 'old@example.com',
    ]);

    $provider = Mockery::mock();
    $provider->shouldReceive('setConfig')->once()->andReturnSelf();
    $provider->shouldReceive('with')->once()->with(['hd' => 'example.com'])->andReturnSelf();
    $provider->shouldReceive('user')->once()->andReturn((object) [
        'email' => 'new@example.com',
        'name' => 'Example User',
        'id' => 'google-user-id',
        'user' => ['verified_email' => true],
    ]);

    Socialite::shouldReceive('driver')->once()->with('google')->andReturn($provider);

    $this->get(route('auth.callback', 'google'))->assertRedirect('/');

    $this->assertAuthenticatedAs($identityOwner);
    expect($identity->refresh()->user_id)->toBe($identityOwner->id)
        ->and($identity->email)->toBe('new@example.com')
        ->and($identity->user_id)->not->toBe($otherUser->id);
});

it('keeps an existing oauth identity working without new email verification evidence', function () {
    $user = User::factory()->create(['email' => 'existing@example.com']);
    OauthIdentity::create([
        'user_id' => $user->id,
        'provider' => 'discord',
        'issuer' => 'discord',
        'provider_user_id' => 'existing-discord-id',
        'email' => $user->email,
    ]);
    $discordSetting = OauthSetting::create([
        'provider' => 'discord',
        'client_id' => 'discord-client-id',
        'client_secret' => 'discord-client-secret',
        'enabled' => true,
    ]);

    $resolvedUser = app(OauthLoginService::class)->login('discord', (object) [
        'email' => 'changed@example.com',
        'name' => 'Existing Discord User',
        'id' => 'existing-discord-id',
        'user' => ['verified' => false],
    ], $discordSetting);

    expect($resolvedUser->is($user))->toBeTrue();
    $this->assertAuthenticatedAs($user);
    $this->assertDatabaseHas('oauth_identities', [
        'user_id' => $user->id,
        'provider' => 'discord',
        'provider_user_id' => 'existing-discord-id',
        'email' => 'changed@example.com',
    ]);
});

it('continues oauth login when another request creates the identity first', function () {
    $user = User::factory()->create(['email' => 'race@example.com']);
    $eventName = 'eloquent.creating: '.OauthIdentity::class;

    Event::listen($eventName, function (OauthIdentity $identity): void {
        $attributes = $identity->getAttributes();

        DB::afterRollBack(fn () => DB::table('oauth_identities')->insert($attributes));

        throw new UniqueConstraintViolationException(
            DB::getDefaultConnection(),
            'insert into oauth_identities',
            [],
            new PDOException('duplicate identity'),
        );
    });

    try {
        $resolvedUser = app(OauthLoginService::class)->login('google', (object) [
            'email' => 'race@example.com',
            'name' => 'Race User',
            'id' => 'google-race-id',
            'user' => ['verified_email' => true],
        ], OauthSetting::where('provider', 'google')->firstOrFail());
    } finally {
        Event::forget($eventName);
    }

    expect($resolvedUser->is($user))->toBeTrue()
        ->and(OauthIdentity::where('provider_user_id', 'google-race-id')->count())->toBe(1);
    $this->assertAuthenticatedAs($user);
});

it('requires strict Discord email verification values', function (mixed $verified) {
    $existingUser = User::factory()->create(['email' => 'existing@example.com']);
    $discordSetting = OauthSetting::create([
        'provider' => 'discord',
        'client_id' => 'discord-client-id',
        'client_secret' => 'discord-client-secret',
        'enabled' => true,
    ]);

    expect(fn () => app(OauthLoginService::class)->login('discord', (object) [
        'email' => 'existing@example.com',
        'name' => 'Discord User',
        'id' => 'discord-user-id',
        'user' => ['verified' => $verified],
    ], $discordSetting))->toThrow(HttpException::class);

    $this->assertGuest();
    expect(OauthIdentity::where('user_id', $existingUser->id)->exists())->toBeFalse();
})->with([
    'unverified' => false,
    'string true' => 'true',
    'integer true' => 1,
]);

it('keeps the Discord verified claim in the raw Socialite user payload', function () {
    $provider = (new ReflectionClass(DiscordProvider::class))->newInstanceWithoutConstructor();
    $mapUser = new ReflectionMethod(DiscordProvider::class, 'mapUserToObject');

    $oauthUser = $mapUser->invoke($provider, [
        'id' => 'discord-user-id',
        'username' => 'Discord User',
        'discriminator' => '0',
        'email' => 'user@example.com',
        'verified' => false,
        'avatar' => null,
    ]);

    expect($oauthUser->user['verified'])->toBeFalse();
});

it('registers a new user from a verified provider identity', function () {
    InstanceSettings::findOrFail(0)->update(['is_registration_enabled' => true]);

    $user = app(OauthLoginService::class)->login('google', (object) [
        'email' => 'verified@example.com',
        'name' => 'Verified User',
        'id' => 'verified-google-id',
        'user' => ['verified_email' => true],
    ], OauthSetting::where('provider', 'google')->firstOrFail());

    expect($user->email)->toBe('verified@example.com');
    $this->assertAuthenticatedAs($user);
    $this->assertDatabaseHas('oauth_identities', [
        'user_id' => $user->id,
        'provider' => 'google',
        'provider_user_id' => 'verified-google-id',
    ]);
});

it('does not link another provider identity to an account by shared email', function () {
    $user = User::factory()->create(['email' => 'shared@example.com']);
    OauthIdentity::create([
        'user_id' => $user->id,
        'provider' => 'github',
        'issuer' => 'github',
        'provider_user_id' => 'github-user-id',
        'email' => 'shared@example.com',
    ]);

    expect(fn () => app(OauthLoginService::class)->login('google', (object) [
        'email' => 'shared@example.com',
        'name' => 'Other Provider User',
        'id' => 'google-user-id',
        'user' => ['verified_email' => true],
    ], OauthSetting::where('provider', 'google')->firstOrFail()))->toThrow(HttpException::class);

    $this->assertGuest();
    expect(OauthIdentity::count())->toBe(1);
});

it('sends an OAuth user with confirmed two factor authentication to the Fortify challenge', function () {
    config()->set('fortify.features', [Features::twoFactorAuthentication(['confirm' => true])]);
    $user = User::factory()->create([
        'email' => 'two-factor@example.com',
        'two_factor_secret' => encrypt('secret'),
        'two_factor_confirmed_at' => now(),
    ]);
    OauthIdentity::create([
        'user_id' => $user->id,
        'provider' => 'google',
        'issuer' => 'google',
        'provider_user_id' => 'two-factor-google-id',
        'email' => $user->email,
    ]);

    $provider = Mockery::mock();
    $provider->shouldReceive('setConfig')->once()->andReturnSelf();
    $provider->shouldReceive('with')->once()->andReturnSelf();
    $provider->shouldReceive('user')->once()->andReturn((object) [
        'email' => $user->email,
        'name' => $user->name,
        'id' => 'two-factor-google-id',
        'user' => ['verified_email' => true],
    ]);
    Socialite::shouldReceive('driver')->once()->with('google')->andReturn($provider);

    $this->get(route('auth.callback', 'google'))
        ->assertRedirect(route('two-factor.login'))
        ->assertSessionHas('login.id', $user->id);

    $this->assertGuest();
});

it('completes OAuth login without a challenge when two factor authentication is not enabled for the user', function () {
    $user = User::factory()->create(['email' => 'without-two-factor@example.com']);
    OauthIdentity::create([
        'user_id' => $user->id,
        'provider' => 'google',
        'issuer' => 'google',
        'provider_user_id' => 'plain-google-id',
        'email' => $user->email,
    ]);

    $provider = Mockery::mock();
    $provider->shouldReceive('setConfig')->once()->andReturnSelf();
    $provider->shouldReceive('with')->once()->andReturnSelf();
    $provider->shouldReceive('user')->once()->andReturn((object) [
        'email' => $user->email,
        'name' => $user->name,
        'id' => 'plain-google-id',
        'user' => ['verified_email' => true],
    ]);
    Socialite::shouldReceive('driver')->once()->with('google')->andReturn($provider);

    $this->get(route('auth.callback', 'google'))->assertRedirect('/');

    $this->assertAuthenticatedAs($user);
});

it('rejects redirect requests for a disabled provider', function () {
    $this->withoutVite();
    OauthSetting::where('provider', 'google')->update(['enabled' => false]);

    $this->get(route('auth.redirect', 'google'))->assertForbidden();
    $this->assertGuest();
});

it('rejects callback requests for a disabled provider', function () {
    OauthSetting::where('provider', 'google')->update(['enabled' => false]);

    $this->from('/login')->get(route('auth.callback', 'google'))->assertRedirect('/login');
    $this->assertGuest();
});

it('rejects oauth logins when the provider does not return an email address', function (?string $providerEmail) {
    config()->set('app.maintenance.driver', 'file');
    InstanceSettings::firstOrCreate([
        'id' => 0,
    ], [
        'is_registration_enabled' => false,
    ])->update([
        'is_registration_enabled' => true,
    ]);

    $provider = Mockery::mock();
    $provider->shouldReceive('setConfig')->once()->andReturnSelf();
    $provider->shouldReceive('with')->once()->with(['hd' => 'example.com'])->andReturnSelf();
    $provider->shouldReceive('user')->once()->andReturn((object) [
        'email' => $providerEmail,
        'name' => 'Example User',
        'id' => 'google-user-id',
    ]);

    Socialite::shouldReceive('driver')->once()->with('google')->andReturn($provider);

    $response = $this->from('/login')->get(route('auth.callback', 'google'));

    $response->assertRedirect('/login');
    expect(User::count())->toBe(0);
})->with([
    'null email' => [null],
    'blank email' => ['   '],
    'malformed email' => ['not-an-email'],
    'missing domain' => ['user@'],
]);

it('rejects oauth logins when the provider does not return a valid user id', function (mixed $invalidId) {
    $oauthUser = (object) [
        'email' => 'user@example.edu',
        'name' => 'Example User',
    ];

    if ($invalidId !== 'missing') {
        $oauthUser->id = $invalidId;
    }

    try {
        app(OauthLoginService::class)->login('google', $oauthUser, OauthSetting::where('provider', 'google')->firstOrFail());
    } catch (HttpException $exception) {
        expect($exception->getStatusCode())->toBe(403)
            ->and(OauthIdentity::count())->toBe(0)
            ->and(User::count())->toBe(0);

        return;
    }

    $this->fail('Expected an invalid OAuth provider user ID to be rejected.');
})->with([
    'null id' => [null],
    'missing id' => ['missing'],
    'blank id' => ['   '],
    'non-scalar id' => [[]],
    'true id' => [true],
    'false id' => [false],
    'float id' => [1.0],
]);