<?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 testIncludesTodayAndReturnsSixDays(): void
    {
        $f = ForecastMapper::map($this->daily());

        self::assertCount(6, $f);
        self::assertSame([
            'date' => '2026-09-11', 'weather_code' => 3, 'temp_max' => 17.9, 'temp_min' => 11.0,
            'precip_mm' => 0.0, 'precip_prob' => 10,
        ], $f[0]);
        self::assertSame('2026-09-16', $f[5]['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($f[3]['weather_code']);
        self::assertNull($f[3]['precip_prob']);
        self::assertSame(17.4, $f[3]['temp_max']);
    }

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

        self::assertCount(3, ForecastMapper::map($daily));
    }

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