<?php

declare(strict_types=1);

namespace App\Tests\Service\Season;

use App\Config\SeasonTask;
use App\Entity\SeasonAssignment;
use App\Entity\SeasonAssignmentTask;
use App\Entity\SeasonTaskDocument;
use App\Entity\Upload;
use App\Repository\SeasonTaskDocumentRepository;
use App\Service\Season\SeasonTaskSynchronizer;
use Doctrine\ORM\EntityManagerInterface;
use PHPUnit\Framework\MockObject\MockObject;
use PHPUnit\Framework\TestCase;

/**
 * What makes the enum extensible is that this fills in whatever an assignment is missing, so
 * that is what is asserted: new entries appear on assignments that already exist, and rows of
 * an entry that was removed are left alone rather than deleted.
 */
class SeasonTaskSynchronizerTest extends TestCase
{
    private EntityManagerInterface&MockObject $entityManager;
    private SeasonTaskDocumentRepository&MockObject $seasonTaskDocumentRepository;
    private SeasonTaskSynchronizer $synchronizer;

    protected function setUp(): void
    {
        $this->entityManager = $this->createMock(EntityManagerInterface::class);
        $this->seasonTaskDocumentRepository = $this->createMock(SeasonTaskDocumentRepository::class);

        $this->synchronizer = new SeasonTaskSynchronizer(
            $this->entityManager,
            $this->seasonTaskDocumentRepository
        );
    }

    public function testItCreatesOneRowPerEntryInEnumOrder(): void
    {
        $seasonAssignment = new SeasonAssignment();

        $this->entityManager->expects($this->exactly(count(SeasonTask::cases())))->method('persist');
        $this->entityManager->expects($this->once())->method('flush');

        $this->synchronizer->sync($seasonAssignment);

        $this->assertSame(
            array_map(static fn (SeasonTask $task): string => $task->value, SeasonTask::cases()),
            $this->keysOf($seasonAssignment)
        );
    }

    public function testItOnlyCreatesWhatIsMissing(): void
    {
        $seasonAssignment = new SeasonAssignment();
        $seasonAssignment->addTask((new SeasonAssignmentTask())->setTaskKey(SeasonTask::CONTRACT->value));

        $this->entityManager->expects($this->exactly(count(SeasonTask::cases()) - 1))->method('persist');

        $this->synchronizer->sync($seasonAssignment);

        $this->assertCount(count(SeasonTask::cases()), $seasonAssignment->getTasks());
        $this->assertSame(
            1,
            count(array_filter(
                $this->keysOf($seasonAssignment),
                static fn (string $key): bool => SeasonTask::CONTRACT->value === $key
            ))
        );
    }

    public function testASyncedAssignmentIsNotFlushedAgain(): void
    {
        $seasonAssignment = new SeasonAssignment();

        foreach (SeasonTask::cases() as $case) {
            $seasonAssignment->addTask((new SeasonAssignmentTask())->setTaskKey($case->value));
        }

        $this->entityManager->expects($this->never())->method('persist');
        $this->entityManager->expects($this->never())->method('flush');

        $this->synchronizer->sync($seasonAssignment);
    }

    public function testARowOfAnUnknownEntryIsKept(): void
    {
        $seasonAssignment = new SeasonAssignment();
        $seasonAssignment->addTask((new SeasonAssignmentTask())->setTaskKey('entry_removed_from_the_enum'));

        $this->entityManager->expects($this->never())->method('remove');

        $this->synchronizer->sync($seasonAssignment);

        $this->assertCount(count(SeasonTask::cases()) + 1, $seasonAssignment->getTasks());
        $this->assertContains('entry_removed_from_the_enum', $this->keysOf($seasonAssignment));
    }

    public function testAnEntryHandingOutADepositedDocumentStartsTickedForTheOffice(): void
    {
        $this->depositDocumentsFor(SeasonTask::MASTER_DATA);

        $seasonAssignment = new SeasonAssignment();

        $this->synchronizer->sync($seasonAssignment);

        $this->assertSame([SeasonTask::MASTER_DATA->value], $this->officeDoneKeysOf($seasonAssignment));
    }

    /**
     * The row keeps the file it was given. Replacing the library document later is what the next
     * season gets, and what the propagate action carries over by hand - never a read of this row.
     */
    public function testTheDocumentIsCopiedOntoTheRow(): void
    {
        $document = new Upload();

        $this->depositDocuments([SeasonTask::MASTER_DATA], $document);

        $seasonAssignment = new SeasonAssignment();

        $this->synchronizer->sync($seasonAssignment);

        foreach ($seasonAssignment->getTasks() as $task) {
            $this->assertSame(
                SeasonTask::MASTER_DATA->value === $task->getTaskKey() ? $document : null,
                $task->getDocument(),
                sprintf('Entry "%s" was given the wrong document.', $task->getTaskKey())
            );
        }
    }

    /**
     * The entry hands a document out, it is just not deposited yet - so the office still has to
     * put it together and the row starts open.
     */
    public function testAnEntryWithoutADepositedDocumentStartsOpen(): void
    {
        $this->depositDocumentsFor();

        $seasonAssignment = new SeasonAssignment();

        $this->synchronizer->sync($seasonAssignment);

        $this->assertSame([], $this->officeDoneKeysOf($seasonAssignment));
    }

    public function testThePreTickNeverOverwritesAnExistingRow(): void
    {
        $this->depositDocumentsFor(SeasonTask::MASTER_DATA);

        $seasonAssignment = new SeasonAssignment();
        $seasonAssignment->addTask(
            (new SeasonAssignmentTask())->setTaskKey(SeasonTask::MASTER_DATA->value)
        );

        $this->synchronizer->sync($seasonAssignment);

        $this->assertSame(
            [],
            $this->officeDoneKeysOf($seasonAssignment),
            'The office unticked this row, and the next sync has to leave it alone.'
        );
    }

    private function depositDocumentsFor(SeasonTask ...$tasks): void
    {
        $this->depositDocuments($tasks, new Upload());
    }

    /**
     * @param SeasonTask[] $tasks
     */
    private function depositDocuments(array $tasks, Upload $document): void
    {
        $documents = [];

        foreach ($tasks as $task) {
            $documents[$task->value] = (new SeasonTaskDocument())
                ->setTaskKey($task->value)
                ->setDocument($document)
            ;
        }

        $this->seasonTaskDocumentRepository->method('findIndexedByTaskKey')->willReturn($documents);
    }

    /**
     * @return string[]
     */
    private function officeDoneKeysOf(SeasonAssignment $seasonAssignment): array
    {
        return array_values(array_map(
            static fn (SeasonAssignmentTask $task): string => $task->getTaskKey(),
            array_filter(
                $seasonAssignment->getTasks()->toArray(),
                static fn (SeasonAssignmentTask $task): bool => $task->isOfficeDone()
            )
        ));
    }

    /**
     * @return string[]
     */
    private function keysOf(SeasonAssignment $seasonAssignment): array
    {
        return array_map(
            static fn (SeasonAssignmentTask $task): string => $task->getTaskKey(),
            $seasonAssignment->getTasks()->toArray()
        );
    }
}