<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Exception\InvalidArgumentException;
use Symfony\Component\Validator\Exception\MissingOptionsException;

/**
 * Validates that a given string length is between some minimum and maximum value.
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
class Length extends Constraint
{
    public const TOO_SHORT_ERROR = '9ff3fdc4-b214-49db-8718-39c315e33d45';
    public const TOO_LONG_ERROR = 'd94b19cc-114f-4f44-9cc4-4138e80a87b9';
    public const NOT_EQUAL_LENGTH_ERROR = '4b6f5c76-22b4-409d-af16-fbe823ba9332';
    public const INVALID_CHARACTERS_ERROR = '35e6a710-aa2e-4719-b58e-24b35749b767';

    protected const ERROR_NAMES = [
        self::TOO_SHORT_ERROR => 'TOO_SHORT_ERROR',
        self::TOO_LONG_ERROR => 'TOO_LONG_ERROR',
        self::NOT_EQUAL_LENGTH_ERROR => 'NOT_EQUAL_LENGTH_ERROR',
        self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
    ];

    public const COUNT_BYTES = 'bytes';
    public const COUNT_CODEPOINTS = 'codepoints';
    public const COUNT_GRAPHEMES = 'graphemes';

    private const VALID_COUNT_UNITS = [
        self::COUNT_BYTES,
        self::COUNT_CODEPOINTS,
        self::COUNT_GRAPHEMES,
    ];

    public string $maxMessage = 'This value is too long. It should have {{ limit }} character or less.|This value is too long. It should have {{ limit }} characters or less.';
    public string $minMessage = 'This value is too short. It should have {{ limit }} character or more.|This value is too short. It should have {{ limit }} characters or more.';
    public string $exactMessage = 'This value should have exactly {{ limit }} character.|This value should have exactly {{ limit }} characters.';
    public string $charsetMessage = 'This value does not match the expected {{ charset }} charset.';
    public ?int $max = null;
    public ?int $min = null;
    public string $charset = 'UTF-8';
    /** @var callable|null */
    public $normalizer;
    /** @var self::COUNT_* */
    public string $countUnit = self::COUNT_CODEPOINTS;

    /**
     * @param positive-int|null  $exactly    The exact expected length
     * @param int<0, max>|null   $min        The minimum expected length
     * @param positive-int|null  $max        The maximum expected length
     * @param string|null        $charset    The charset to be used when computing value's length (defaults to UTF-8)
     * @param callable|null      $normalizer A callable to normalize value before it is validated
     * @param self::COUNT_*|null $countUnit  The character count unit for the length check (defaults to {@see Length::COUNT_CODEPOINTS})
     * @param string[]|null      $groups
     */
    public function __construct(
        ?int $exactly = null,
        ?int $min = null,
        ?int $max = null,
        ?string $charset = null,
        ?callable $normalizer = null,
        ?string $countUnit = null,
        ?string $exactMessage = null,
        ?string $minMessage = null,
        ?string $maxMessage = null,
        ?string $charsetMessage = null,
        ?array $groups = null,
        mixed $payload = null,
    ) {
        if (null !== $exactly && null === $min && null === $max) {
            $min = $max = $exactly;
        }

        parent::__construct(null, $groups, $payload);

        $this->min = $min;
        $this->max = $max;
        $this->charset = $charset ?? $this->charset;
        $this->normalizer = $normalizer;
        $this->countUnit = $countUnit ?? $this->countUnit;
        $this->exactMessage = $exactMessage ?? $this->exactMessage;
        $this->minMessage = $minMessage ?? $this->minMessage;
        $this->maxMessage = $maxMessage ?? $this->maxMessage;
        $this->charsetMessage = $charsetMessage ?? $this->charsetMessage;

        if (null === $this->min && null === $this->max) {
            throw new MissingOptionsException(\sprintf('Either option "min" or "max" must be given for constraint "%s".', __CLASS__), ['min', 'max']);
        }

        if (null !== $this->normalizer && !\is_callable($this->normalizer)) {
            throw new InvalidArgumentException(\sprintf('The "normalizer" option must be a valid callable ("%s" given).', get_debug_type($this->normalizer)));
        }

        if (!\in_array($this->countUnit, self::VALID_COUNT_UNITS, true)) {
            throw new InvalidArgumentException(\sprintf('The "countUnit" option must be one of the "%s"::COUNT_* constants ("%s" given).', __CLASS__, $this->countUnit));
        }
    }
}
