<?php

declare(strict_types=1);

namespace Belevo\EnelixUtils\Tests;

use Belevo\EnelixUtils\Energiediagramm\EnergyChartCalculator;
use InvalidArgumentException;
use PHPUnit\Framework\TestCase;

require_once __DIR__ . '/../Energiediagramm/libs/EnergyChartCalculator.php';

final class EnergiediagrammTest extends TestCase
{
    private string $timezone;

    protected function setUp(): void
    {
        $this->timezone = date_default_timezone_get();
        date_default_timezone_set('Europe/Zurich');
    }

    protected function tearDown(): void
    {
        date_default_timezone_set($this->timezone);
    }

    public function testCalendarRangesUseLocalBoundaries(): void
    {
        [$dayStart, $dayEnd] = EnergyChartCalculator::rangeBounds(
            'day',
            '2026-09-27',
            '2026-09-01',
            '2026-09-02'
        );
        self::assertSame('2026-09-27 00:00', date('Y-m-d H:i', $dayStart));
        self::assertSame('2026-09-28 00:00', date('Y-m-d H:i', $dayEnd));

        [$weekStart, $weekEnd] = EnergyChartCalculator::rangeBounds(
            'week',
            '2026-09-27',
            '2026-09-01',
            '2026-09-02'
        );
        self::assertSame('2026-09-21', date('Y-m-d', $weekStart));
        self::assertSame('2026-09-28', date('Y-m-d', $weekEnd));

        [$monthStart, $monthEnd] = EnergyChartCalculator::rangeBounds(
            'month',
            '2026-09-27',
            '2026-09-01',
            '2026-09-02'
        );
        self::assertSame('2026-09-01', date('Y-m-d', $monthStart));
        self::assertSame('2026-10-01', date('Y-m-d', $monthEnd));

        [$yearStart, $yearEnd] = EnergyChartCalculator::rangeBounds(
            'year',
            '2026-09-27',
            '2026-09-01',
            '2026-09-02'
        );
        self::assertSame('2026-01-01', date('Y-m-d', $yearStart));
        self::assertSame('2027-01-01', date('Y-m-d', $yearEnd));
    }

    public function testCustomRangeIncludesCompleteEndDateAcrossDstChange(): void
    {
        [$start, $end] = EnergyChartCalculator::rangeBounds(
            'custom',
            '2026-03-29',
            '2026-03-28',
            '2026-03-30'
        );

        self::assertSame('2026-03-28 00:00', date('Y-m-d H:i', $start));
        self::assertSame('2026-03-31 00:00', date('Y-m-d H:i', $end));
    }

    public function testInvalidCustomRangeIsRejected(): void
    {
        $this->expectException(InvalidArgumentException::class);

        EnergyChartCalculator::rangeBounds(
            'custom',
            '2026-09-27',
            '2026-09-28',
            '2026-09-27'
        );
    }

    public function testMetricsUseDerivedOrExplicitConsumption(): void
    {
        $derived = EnergyChartCalculator::metrics(20.0, 5.0, 3.0);
        self::assertSame(18.0, $derived['Hausverbrauch']);
        self::assertSame(15.0, $derived['Eigenverbrauch']);
        self::assertSame(75.0, $derived['Eigenverbrauchsquote']);
        self::assertEqualsWithDelta(83.3333, $derived['Autarkiegrad'], 0.001);

        $explicit = EnergyChartCalculator::metrics(20.0, 5.0, 3.0, 16.0);
        self::assertSame(16.0, $explicit['Hausverbrauch']);
        self::assertSame(13.0, $explicit['Eigenverbrauch']);
        self::assertSame(65.0, $explicit['Eigenverbrauchsquote']);
        self::assertSame(81.25, $explicit['Autarkiegrad']);
    }

    public function testColorsAreValidatedAndNormalized(): void
    {
        self::assertSame(
            '#2F80ED',
            EnergyChartCalculator::normalizeColor('#2f80ed', '#000000')
        );
        self::assertSame(
            '#00FF4C',
            EnergyChartCalculator::normalizeColor('65356', '#000000')
        );
        self::assertSame(
            '#000000',
            EnergyChartCalculator::normalizeColor('0', '#FFFFFF')
        );
        self::assertSame(
            '#22A06B',
            EnergyChartCalculator::normalizeColor('16777216', '#22a06b')
        );
        self::assertSame(
            '#22A06B',
            EnergyChartCalculator::normalizeColor('-1', '#22a06b')
        );
    }
}