<?php

namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Statistical;

use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Statistical;
use PHPUnit\Framework\TestCase;

class PoissonTest extends TestCase
{
    protected function setUp(): void
    {
        Functions::setCompatibilityMode(Functions::COMPATIBILITY_EXCEL);
    }

    /**
     * @dataProvider providerPOISSON
     *
     * @param mixed $expectedResult
     */
    public function testPOISSON($expectedResult, ...$args): void
    {
        $result = Statistical::POISSON(...$args);
        self::assertEqualsWithDelta($expectedResult, $result, 1E-12);
    }

    public function providerPOISSON(): array
    {
        return require 'tests/data/Calculation/Statistical/POISSON.php';
    }

    /**
     * @dataProvider providerPoissonArray
     */
    public function testPoissonArray(array $expectedResult, string $values, string $mean): void
    {
        $calculation = Calculation::getInstance();

        $formula = "=POISSON({$values}, {$mean}, false)";
        $result = $calculation->_calculateFormulaValue($formula);
        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
    }

    public function providerPoissonArray(): array
    {
        return [
            'row/column vectors' => [
                [
                    [0.4749316557209494, 0.41547307344655265, 0.028388126533408903],
                    [0.3081373033023279, 0.3299417281086086, 0.0867439330307142],
                    [0.14758417287196898, 0.19139299302082188, 0.1804470443154836],
                ],
                '{0.125, 0.5, 3}',
                '{0.7; 1.2; 2}',
            ],
        ];
    }
}