<?php

use App\Models\Setting;
use App\Services\PasswordGeneratorService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

pest()->extend(TestCase::class)
    ->use(RefreshDatabase::class);

beforeEach(function () {
    $this->service = app(PasswordGeneratorService::class);
});

test('options fall back to the defaults when nothing is saved', function () {
    expect($this->service->options())->toBe([
        'mode' => 'button',
        'type' => 'characters',
        'length' => 20,
        'characterSets' => ['uppercase', 'lowercase', 'numbers'],
        'avoidAmbiguous' => true,
        'words' => 6,
        'separator' => 'hyphen',
    ]);
});

test('options read the saved generator settings', function () {
    Setting::set('password_generator_mode', 'prefill');
    Setting::set('password_generator_type', 'passphrase');
    Setting::set('password_generator_length', 32);
    Setting::set('password_generator_character_sets', 'numbers,symbols');
    Setting::set('password_generator_avoid_ambiguous', '0');
    Setting::set('password_generator_words', 8);
    Setting::set('password_generator_separator', 'space');

    expect($this->service->options())->toBe([
        'mode' => 'prefill',
        'type' => 'passphrase',
        'length' => 32,
        'characterSets' => ['numbers', 'symbols'],
        'avoidAmbiguous' => false,
        'words' => 8,
        'separator' => 'space',
    ]);
});

test('options replace saved values that are not allowed with the defaults', function () {
    Setting::set('password_generator_mode', 'sometimes');
    Setting::set('password_generator_type', 'emoji');
    Setting::set('password_generator_length', 8);
    Setting::set('password_generator_character_sets', 'runes');
    Setting::set('password_generator_words', 40);
    Setting::set('password_generator_separator', 'comma');

    expect($this->service->options())->toMatchArray([
        'mode' => 'button',
        'type' => 'characters',
        'length' => 20,
        'characterSets' => ['uppercase', 'lowercase', 'numbers'],
        'words' => 6,
        'separator' => 'hyphen',
    ]);
});

test('a character password has the chosen length and only characters from the chosen sets', function () {
    $password = $this->service->generate([
        'type' => 'characters',
        'length' => 40,
        'characterSets' => ['numbers'],
        'avoidAmbiguous' => true,
        'words' => 6,
        'separator' => 'hyphen',
    ]);

    expect($password)->toMatch('/^[2-9]{40}$/');
});

test('a character password holds at least one character of every chosen set', function () {
    foreach (range(1, 25) as $draw) {
        expect($this->service->characters(4, ['uppercase', 'lowercase', 'numbers', 'symbols'], false))
            ->toMatch('/[A-Z]/')
            ->toMatch('/[a-z]/')
            ->toMatch('/[0-9]/')
            ->toMatch('/[^A-Za-z0-9]/');
    }
});

test('a character password leaves out look-alike characters when asked', function () {
    foreach (range(1, 25) as $draw) {
        expect($this->service->characters(64, ['uppercase', 'lowercase', 'numbers'], true))->not->toMatch('/[0O1lI]/');
    }
});

test('a character password needs room for every chosen set', function () {
    $this->service->characters(2, ['uppercase', 'lowercase', 'numbers'], false);
})->throws(InvalidArgumentException::class);

test('a passphrase has the chosen number of words from the word list, joined by the separator', function () {
    $wordList = file(resource_path('wordlists/eff-large-wordlist.txt'), FILE_IGNORE_NEW_LINES);

    $passphrase = $this->service->generate([
        'type' => 'passphrase',
        'length' => 20,
        'characterSets' => ['uppercase'],
        'avoidAmbiguous' => true,
        'words' => 7,
        'separator' => 'dot',
    ]);

    $words = explode('.', $passphrase);
    expect($words)->toHaveCount(7);
    expect(array_diff($words, $wordList))->toBe([]);
});

test('the word list is EFF\'s large list without its hyphenated words', function () {
    expect($this->service->wordList())
        ->toHaveCount(7772)
        ->each->toMatch('/^[a-z]+$/');
});

test('two generated passwords differ', function () {
    expect($this->service->generate())->not->toBe($this->service->generate());
});

test('the entropy estimate follows the alphabet or the word list', function () {
    expect($this->service->entropyBits([
        'type' => 'characters',
        'length' => 20,
        'characterSets' => ['uppercase', 'lowercase', 'numbers'],
        'avoidAmbiguous' => true,
    ]))->toBe(116);

    expect($this->service->entropyBits([
        'type' => 'passphrase',
        'length' => 20,
        'characterSets' => [],
        'avoidAmbiguous' => false,
        'words' => 6,
    ]))->toBe(77);
});