<?php

declare(strict_types=1);

namespace App\Tests\Entity;

use App\Entity\Application;
use App\Entity\Assignment;
use App\Entity\Disposition;
use App\Entity\Teamer;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;

/**
 * A called-off teamer is free again: the teamer views ask the assignment for the teamer's
 * disposition to decide between "eingeteilt" and the application button, so a called-off
 * disposition must not be handed out there.
 */
class AssignmentTest extends TestCase
{
    public function testTheActiveDispositionOfATeamerIsReturned(): void
    {
        $assignment = new Assignment();
        $teamer = new Teamer();
        $disposition = $this->createDisposition($assignment, $teamer);

        $this->assertSame($disposition, $assignment->getActiveDispositionByTeamer($teamer));
    }

    public function testACalledOffDispositionIsNotReturned(): void
    {
        $assignment = new Assignment();
        $teamer = new Teamer();

        $this
            ->createDisposition($assignment, $teamer)
            ->setStatus(Disposition::STATUS_CALLED_OFF)
        ;

        $this->assertNull($assignment->getActiveDispositionByTeamer($teamer));
    }

    public function testTheDispositionOfAnotherTeamerIsNotReturned(): void
    {
        $assignment = new Assignment();
        $this->createDisposition($assignment, new Teamer());

        $this->assertNull($assignment->getActiveDispositionByTeamer(new Teamer()));
    }

    /**
     * A teamer can be called off and disposed again on the same assignment, so both dispositions
     * live side by side - the active one has to win.
     */
    public function testTheActiveDispositionWinsOverACalledOffOne(): void
    {
        $assignment = new Assignment();
        $teamer = new Teamer();

        $this
            ->createDisposition($assignment, $teamer)
            ->setStatus(Disposition::STATUS_CALLED_OFF)
        ;
        $disposition = $this->createDisposition($assignment, $teamer);

        $this->assertSame($disposition, $assignment->getActiveDispositionByTeamer($teamer));
    }

    /**
     * The "Busbegleitung ab" field stores 0 for "Keine Busbegleitung" as well as null.
     */
    #[DataProvider('providePickups')]
    public function testHasBusEscort(int|string|null $pickup, bool $expected): void
    {
        $this->assertSame($expected, (new Assignment())->setPickup($pickup)->hasBusEscort());
    }

    public static function providePickups(): iterable
    {
        yield 'none' => [null, false];
        yield 'zero' => [0, false];
        yield 'empty form value' => ['', false];
        yield 'pickup' => [4711, true];
    }

    public function testTheFirstPlacementTakesPlaceOne(): void
    {
        $this->assertSame(1, $this->createDisposition(new Assignment(), new Teamer())->getSlot());
    }

    /**
     * The n8n feed hangs the Wechselpass off the place number: a replacement takes the number the
     * called-off teamer freed, and whoever stays keeps theirs.
     */
    public function testAReplacementTakesTheFreedPlaceAndTheStayerKeepsTheirs(): void
    {
        $assignment = (new Assignment())->setAvailableDispositions(2);
        $first = $this->createDisposition($assignment, new Teamer());
        $second = $this->createDisposition($assignment, new Teamer());

        $first->setStatus(Disposition::STATUS_CALLED_OFF);
        $replacement = $this->createDisposition($assignment, new Teamer());

        $this->assertSame(1, $replacement->getSlot());
        $this->assertSame(2, $second->getSlot());
        $this->assertSame([1 => $replacement, 2 => $second], $assignment->getPlaces());
    }

    public function testACalledOffPlacementLeavesAnOpenPlace(): void
    {
        $assignment = (new Assignment())->setAvailableDispositions(2);
        $calledOff = $this->createDisposition($assignment, new Teamer());
        $stayer = $this->createDisposition($assignment, new Teamer());
        $calledOff->setStatus(Disposition::STATUS_CALLED_OFF);

        $this->assertSame([1 => null, 2 => $stayer], $assignment->getPlaces());
    }

    public function testUnfilledPlacesAreOpen(): void
    {
        $assignment = (new Assignment())->setAvailableDispositions(3);
        $disposition = $this->createDisposition($assignment, new Teamer());

        $this->assertSame([1 => $disposition, 2 => null, 3 => null], $assignment->getPlaces());
    }

    /**
     * Striking a place while a high number is still held drops an open low one, not the person.
     */
    public function testLoweringTheCountKeepsTheHeldPlace(): void
    {
        $assignment = (new Assignment())->setAvailableDispositions(2);
        $calledOff = $this->createDisposition($assignment, new Teamer());
        $stayer = $this->createDisposition($assignment, new Teamer());
        $calledOff->setStatus(Disposition::STATUS_CALLED_OFF);

        $assignment->setAvailableDispositions(1);

        $this->assertSame([2 => $stayer], $assignment->getPlaces());
    }

    public function testAPlaceHeldBeyondTheCountIsStillListed(): void
    {
        $assignment = (new Assignment())->setAvailableDispositions(2);
        $first = $this->createDisposition($assignment, new Teamer());
        $second = $this->createDisposition($assignment, new Teamer());

        $assignment->setAvailableDispositions(1);

        $this->assertSame([1 => $first, 2 => $second], $assignment->getPlaces());
    }

    public function testAnUnnumberedPlacementTakesAFreeNumberAfterTheNumberedOnes(): void
    {
        $assignment = (new Assignment())->setAvailableDispositions(2);
        $unnumbered = $this->createDisposition($assignment, new Teamer())->setSlot(null);
        $numbered = $this->createDisposition($assignment, new Teamer())->setSlot(1);

        $this->assertSame([1 => $numbered, 2 => $unnumbered], $assignment->getPlaces());
    }

    private function createDisposition(Assignment $assignment, Teamer $teamer): Disposition
    {
        $disposition = new Disposition(new Application($assignment, $teamer));
        $assignment->addDisposition($disposition);

        return $disposition;
    }
}