<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Guardian;

use Brain\Monkey\Functions;
use Mockery;
use Unsupervised\Schedular\Guardian\FamilyPage;
use Unsupervised\Schedular\Guardian\GuardianService;
use Unsupervised\Schedular\Registration\Answer;
use Unsupervised\Schedular\Registration\AnswerRepository;
use Unsupervised\Schedular\Registration\Question;
use Unsupervised\Schedular\Registration\QuestionRepository;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class FamilyPageTest extends TestCase
{
    private GuardianService&Mockery\MockInterface $guardians;
    private QuestionRepository&Mockery\MockInterface $questions;
    private AnswerRepository&Mockery\MockInterface $answers;
    private FamilyPage $page;

    protected function setUp(): void
    {
        parent::setUp();

        $this->guardians = Mockery::mock(GuardianService::class);
        $this->questions = Mockery::mock(QuestionRepository::class);
        $this->answers   = Mockery::mock(AnswerRepository::class);

        $this->page = new FamilyPage($this->guardians, $this->questions, $this->answers);

        $_POST = [];
        $_GET  = [];

        Functions\when('is_user_logged_in')->justReturn(true);
        Functions\when('get_current_user_id')->justReturn(5);
        Functions\when('wp_enqueue_style')->justReturn(null);
        Functions\when('wp_nonce_field')->justReturn('');
        Functions\when('get_permalink')->justReturn('https://studio.test/family/');
        Functions\when('absint')->alias(static fn ($value) => abs((int) $value));
        Functions\when('sanitize_key')->alias(static fn (string $v): string => strtolower(preg_replace('/[^a-z0-9_\-]/i', '', $v) ?? ''));
        Functions\when('sanitize_text_field')->alias(static fn (string $v): string => trim($v));
        Functions\when('sanitize_textarea_field')->alias(static fn (string $v): string => trim($v));
        Functions\when('wp_unslash')->alias(static fn ($v) => $v);
        Functions\when('check_admin_referer')->justReturn(true);
        Functions\when('add_query_arg')->alias(
            static fn (string $key, $value, string $url): string => $url . '?' . $key . '=' . $value
        );
    }

    protected function tearDown(): void
    {
        $_POST = [];
        $_GET  = [];
        parent::tearDown();
    }

    /**
     * A FamilyPage whose redirect is captured instead of exiting the process.
     *
     * @param-out string $captured
     */
    private function capturingPage(?string &$captured): FamilyPage
    {
        $page = Mockery::mock(FamilyPage::class, [$this->guardians, $this->questions, $this->answers])
            ->makePartial()
            ->shouldAllowMockingProtectedMethods();

        $page->shouldReceive('redirect')->andReturnUsing(static function (string $url) use (&$captured): void {
            $captured = $url;
        });

        return $page;
    }

    private function question(int $id, bool $required): Question
    {
        return new Question(offeringId: null, label: 'Instrument', isRequired: $required, scope: Question::SCOPE_ACCOUNT, id: $id);
    }

    public function testLoggedOutVisitorIsOfferedALoginLink(): void
    {
        Functions\when('is_user_logged_in')->justReturn(false);
        Functions\when('wp_login_url')->justReturn('https://studio.test/wp-login.php');

        $html = $this->page->render([]);

        self::assertStringContainsString('log in to manage your family', $html);
    }

    public function testRenderListsTheGuardiansChildren(): void
    {
        $this->guardians->shouldReceive('children')->once()->with(5)->andReturn([
            ['id' => 42, 'name' => 'Ada', 'date_of_birth' => '2015-04-02', 'relationship' => 'Parent'],
        ]);
        $this->questions->shouldReceive('findByScope')->andReturn([]);

        $html = $this->page->render([]);

        self::assertStringContainsString('Ada', $html);
        self::assertStringContainsString('2015-04-02', $html);
        self::assertStringContainsString('Add a child', $html);
    }

    public function testAddCreatesTheChildRecordsItsAnswersAndRedirects(): void
    {
        $_POST = [
            'us_family_action'   => 'add',
            'child_name'         => 'Ada',
            'child_dob'          => '2015-04-02',
            'child_relationship' => 'Parent',
            'us_answers'         => [7 => 'Piano'],
        ];

        $this->questions->shouldReceive('findByScope')->once()->andReturn([$this->question(7, true)]);
        $this->guardians->shouldReceive('createChild')->once()->with(5, 'Ada', '2015-04-02', 'Parent')->andReturn(42);

        $this->answers->shouldReceive('insert')
            ->once()
            ->with(Mockery::on(static fn (Answer $a): bool =>
                $a->questionId === 7
                && $a->studentId === 42
                && $a->registrationId === 42
                && $a->registrationType === Answer::REG_ACCOUNT
                && $a->answerValue === 'Piano'));

        $captured = null;
        $this->capturingPage($captured)->maybeHandleSubmit();

        self::assertSame('https://studio.test/family/?us_family=added', $captured);
    }

    /**
     * Validating before creating is what stops a missing answer from leaving a
     * half-added child behind.
     */
    public function testAddRefusesAMissingRequiredAnswerBeforeCreatingTheChild(): void
    {
        $_POST = [
            'us_family_action' => 'add',
            'child_name'       => 'Ada',
            'us_answers'       => [7 => '   '],
        ];

        $this->questions->shouldReceive('findByScope')->once()->andReturn([$this->question(7, true)]);
        $this->guardians->shouldNotReceive('createChild');
        $this->answers->shouldNotReceive('insert');

        $captured = null;
        $page     = $this->capturingPage($captured);
        $page->shouldNotReceive('redirect');

        $page->maybeHandleSubmit();

        self::assertNull($captured);
    }

    public function testAddSurfacesAServiceErrorInsteadOfRedirecting(): void
    {
        $_POST = ['us_family_action' => 'add', 'child_name' => ''];

        $this->questions->shouldReceive('findByScope')->once()->andReturn([]);
        $this->guardians->shouldReceive('createChild')->once()->andReturn(new \WP_Error('missing_name', 'Please give each child a name.'));
        $this->answers->shouldNotReceive('insert');

        $captured = null;
        $page     = $this->capturingPage($captured);
        $page->shouldNotReceive('redirect');

        $page->maybeHandleSubmit();

        self::assertNull($captured);
    }

    public function testEditDelegatesToTheServiceAndRedirects(): void
    {
        $_POST = [
            'us_family_action' => 'edit',
            'child_id'         => '42',
            'child_name'       => 'Ada L',
            'child_dob'        => '2015-04-02',
        ];

        $this->guardians->shouldReceive('updateChild')->once()->with(5, 42, 'Ada L', '2015-04-02')->andReturn(null);

        $captured = null;
        $this->capturingPage($captured)->maybeHandleSubmit();

        self::assertSame('https://studio.test/family/?us_family=updated', $captured);
    }

    public function testRemoveDelegatesToTheServiceAndRedirects(): void
    {
        $_POST = ['us_family_action' => 'remove', 'child_id' => '42'];

        $this->guardians->shouldReceive('removeChild')->once()->with(5, 42)->andReturn(null);

        $captured = null;
        $this->capturingPage($captured)->maybeHandleSubmit();

        self::assertSame('https://studio.test/family/?us_family=removed', $captured);
    }

    public function testRemoveRefusalIsShownRatherThanRedirected(): void
    {
        $_POST = ['us_family_action' => 'remove', 'child_id' => '42'];

        $this->guardians->shouldReceive('removeChild')->once()->andReturn(
            new \WP_Error('has_history', 'This child has lessons or enrolments on record.')
        );

        $captured = null;
        $page     = $this->capturingPage($captured);
        $page->shouldNotReceive('redirect');

        $page->maybeHandleSubmit();

        self::assertNull($captured);
    }

    public function testAnUnrecognisedActionDoesNothing(): void
    {
        $_POST = ['us_family_action' => 'destroy'];

        $this->guardians->shouldNotReceive('createChild');
        $this->guardians->shouldNotReceive('removeChild');

        $captured = null;
        $page     = $this->capturingPage($captured);
        $page->shouldNotReceive('redirect');

        $page->maybeHandleSubmit();

        self::assertNull($captured);
    }

    public function testNoActionIsANoOp(): void
    {
        $this->guardians->shouldNotReceive('createChild');

        $captured = null;
        $page     = $this->capturingPage($captured);
        $page->shouldNotReceive('redirect');

        $page->maybeHandleSubmit();

        self::assertNull($captured);
    }

    public function testLoggedOutSubmissionIsIgnored(): void
    {
        Functions\when('is_user_logged_in')->justReturn(false);
        $_POST = ['us_family_action' => 'remove', 'child_id' => '42'];

        $this->guardians->shouldNotReceive('removeChild');

        $captured = null;
        $page     = $this->capturingPage($captured);
        $page->shouldNotReceive('redirect');

        $page->maybeHandleSubmit();

        self::assertNull($captured);
    }

    public function testCompletedActionRendersItsConfirmation(): void
    {
        $_GET = ['us_family' => 'added'];

        $this->guardians->shouldReceive('children')->andReturn([]);
        $this->questions->shouldReceive('findByScope')->andReturn([]);

        self::assertStringContainsString('Child added.', $this->page->render([]));
    }
}