<?php

declare(strict_types=1);

namespace App\Tests\Service\Season;

use App\Config\SeasonTask;
use App\Entity\SeasonAssignment;
use App\Entity\SeasonAssignmentTask;
use App\Service\Season\SeasonTaskDeadlineResolver;
use PHPUnit\Framework\TestCase;

/**
 * Neither deadline is stored, so what is asserted here is the arithmetic every reminder, every
 * checklist row and the teamer's own page read - a deadline computed one day off is as silent a
 * failure as a reminder that never fires.
 */
class SeasonTaskDeadlineResolverTest extends TestCase
{
    public function testTheFirstDeadlineIsTheOffsetAppliedToTheTravelStart(): void
    {
        $task = $this->task('2026-11-01');

        $this->assertSame('2026-10-01', $this->resolver()->resolveFirst($task)?->format('Y-m-d'));
    }

    public function testTheOffsetComesFromTheParameter(): void
    {
        $task = $this->task('2026-11-01');

        $this->assertSame(
            '2026-10-18',
            $this->resolver('-14 days')->resolveFirst($task)?->format('Y-m-d')
        );
    }

    public function testAnOverriddenFirstDeadlineWins(): void
    {
        $task = $this->task('2026-11-01')->setDeadlineOverride1(new \DateTimeImmutable('2026-09-15'));

        $this->assertSame('2026-09-15', $this->resolver()->resolveFirst($task)?->format('Y-m-d'));
    }

    public function testTheSecondDeadlineDefaultsToTheFirst(): void
    {
        $task = $this->task('2026-11-01');

        $this->assertSame('2026-10-01', $this->resolver()->resolveSecond($task)?->format('Y-m-d'));
    }

    public function testTheSecondDeadlineFollowsAnOverriddenFirstOne(): void
    {
        $task = $this->task('2026-11-01')->setDeadlineOverride1(new \DateTimeImmutable('2026-09-15'));

        $this->assertSame('2026-09-15', $this->resolver()->resolveSecond($task)?->format('Y-m-d'));
    }

    public function testAnOverriddenSecondDeadlineWinsOverBoth(): void
    {
        $task = $this
            ->task('2026-11-01')
            ->setDeadlineOverride1(new \DateTimeImmutable('2026-09-15'))
            ->setDeadlineOverride2(new \DateTimeImmutable('2026-10-20'))
        ;

        $this->assertSame('2026-09-15', $this->resolver()->resolveFirst($task)?->format('Y-m-d'));
        $this->assertSame('2026-10-20', $this->resolver()->resolveSecond($task)?->format('Y-m-d'));
    }

    public function testAnAssignmentWithoutAStartDateHasNoDeadlines(): void
    {
        $task = (new SeasonAssignmentTask())
            ->setTaskKey(SeasonTask::CONTRACT->value)
            ->setSeasonAssignment(new SeasonAssignment())
        ;

        $this->assertNull($this->resolver()->resolveFirst($task));
        $this->assertNull($this->resolver()->resolveSecond($task));
    }

    private function resolver(string $offset = '-1 month'): SeasonTaskDeadlineResolver
    {
        return new SeasonTaskDeadlineResolver($offset);
    }

    private function task(string $dateFrom): SeasonAssignmentTask
    {
        $seasonAssignment = (new SeasonAssignment())
            ->setDateFrom(new \DateTimeImmutable($dateFrom))
            ->setDateTo(new \DateTimeImmutable($dateFrom.' +5 months'))
            ->setHotelCode('AGR')
        ;

        $task = (new SeasonAssignmentTask())->setTaskKey(SeasonTask::CONTRACT->value);
        $seasonAssignment->addTask($task);

        return $task;
    }
}