<?php

declare(strict_types=1);

namespace Weerscherm\Tests;

use PHPUnit\Framework\TestCase;
use Weerscherm\ForecastMapper;

final class ForecastMapperTest extends TestCase
{
    /** @return array<string, mixed> */
    private function daily(): array
    {
        return json_decode((string) file_get_contents(__DIR__ . '/fixtures/forecast.json'), true)['daily'];
    }

    public function testSkipsTodayAndReturnsFiveDays(): void
    {
        $f = ForecastMapper::map($this->daily());

        self::assertCount(5, $f);
        self::assertSame([
            'date' => '2026-09-12', 'weather_code' => 2, 'temp_max' => 18.3, 'temp_min' => 10.1,
            'precip_mm' => 0.4, 'precip_prob' => 20,
        ], $f[0]);
        self::assertSame('2026-09-16', $f[4]['date']);
    }

    public function testNullValuesStayNull(): void
    {
        $daily = $this->daily();
        $daily['weather_code'][3] = null;
        $daily['precipitation_probability_max'][3] = null;

        $f = ForecastMapper::map($daily);

        self::assertNull($f[2]['weather_code']);
        self::assertNull($f[2]['precip_prob']);
        self::assertSame(17.4, $f[2]['temp_max']);
    }

    public function testShorterResponseGivesFewerDays(): void
    {
        $daily = $this->daily();
        foreach ($daily as $key => $values) {
            $daily[$key] = array_slice($values, 0, 3);
        }

        self::assertCount(2, ForecastMapper::map($daily));
    }

    public function testMissingTimeArrayGivesEmptyList(): void
    {
        self::assertSame([], ForecastMapper::map([]));
    }
}