<?php

declare(strict_types=1);

namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\MathTrig;

use PhpOffice\PhpSpreadsheet\Calculation\Calculation;

class TruncTest extends AllSetupTeardown
{
    #[\PHPUnit\Framework\Attributes\DataProvider('providerTRUNC')]
    public function testTRUNC(mixed $expectedResult, string $formula): void
    {
        $this->mightHaveException($expectedResult);
        $sheet = $this->getSheet();
        $sheet->setCellValue('A2', 1.3);
        $sheet->setCellValue('A3', 2.7);
        $sheet->setCellValue('A4', -3.8);
        $sheet->setCellValue('A5', -5.2);
        $sheet->getCell('A1')->setValue("=TRUNC($formula)");
        $result = $sheet->getCell('A1')->getCalculatedValue();
        self::assertEqualsWithDelta($expectedResult, $result, 1E-12);
    }

    public static function providerTRUNC(): array
    {
        return require 'tests/data/Calculation/MathTrig/TRUNC.php';
    }

    #[\PHPUnit\Framework\Attributes\DataProvider('providerTruncArray')]
    public function testTruncArray(array $expectedResult, string $argument1, string $argument2): void
    {
        $calculation = Calculation::getInstance();

        $formula = "=TRUNC({$argument1}, {$argument2})";
        $result = $calculation->calculateFormula($formula);
        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
    }

    public static function providerTruncArray(): array
    {
        return [
            'matrix' => [[[3.14, 3.141], [3.14159, 3.14159265]], '3.1415926536', '{2, 3; 5, 8}'],
        ];
    }

    #[\PHPUnit\Framework\Attributes\DataProvider('providerTooMuchPrecision')]
    public function testTooMuchPrecision(mixed $expectedResult, float|int|string $value, int $digits = 1): void
    {
        // This test is pretty screwy. Possibly shouldn't even attempt it.
        // At any rate, these results seem to indicate that PHP
        // maximum precision is PHP_FLOAT_DIG - 1 digits, not PHP_FLOAT_DIG.
        // If that changes, at least one of these tests will have to change.
        $sheet = $this->getSheet();
        $sheet->getCell('E1')->setValue($value);
        $sheet->getCell('E2')->setValue("=TRUNC(E1,$digits)");
        /** @var float|string */
        $result = $sheet->getCell('E2')->getCalculatedValue();
        self::assertSame($expectedResult, (string) $result);
    }

    public static function providerTooMuchPrecision(): array
    {
        $max64Plus1 = 9223372036854775808;
        $stringMax = (string) $max64Plus1;

        return [
            '2 digits less than PHP_FLOAT_DIG' => ['1' . str_repeat('0', PHP_FLOAT_DIG - 4) . '1.2', 10.0 ** (PHP_FLOAT_DIG - 3) + 1.2, 1],
            '1 digit less than PHP_FLOAT_DIG' => ['1' . str_repeat('0', PHP_FLOAT_DIG - 3) . '1', 10.0 ** (PHP_FLOAT_DIG - 2) + 1.2, 1],
            'PHP_FLOAT_DIG' => ['1.0E+' . (PHP_FLOAT_DIG - 1), 10.0 ** (PHP_FLOAT_DIG - 1) + 1.2, 1],
            '1 digit more than PHP_FLOAT_DIG' => ['1.0E+' . PHP_FLOAT_DIG, 10.0 ** PHP_FLOAT_DIG + 1.2, 1],
            '32bit exceed int max' => ['3123456780', 3123456789, -1],
            '64bit exceed int max neg decimals' => [$stringMax, $max64Plus1, -1],
            '64bit exceed int max pos decimals' => [$stringMax, $max64Plus1, 1],
        ];
    }
}
