<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use Carbon\Carbon;

class Adult implements Rule
{
    /**
     * Error message
     *
     * @var string|null
     */
    private $error_message;

    /**
     * Create a new rule instance.
     *
     * @param null|string $message
     * @return void
     */
    public function __construct(?string $message = null)
    {
        $this->error_message = $message ?? trans('Vous devez être majeur.');
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  mixed $attribute
     * @param  mixed $value
     * @return boolean
     * @throws \Exception If the attribute cannot be parsed.
     * @throws \RuntimeException Is already catched.
     */
    public function passes($attribute, $value)
    {
        try {
            //@phpcs:enable
            $MJ = Carbon::now()->subYears(18);

            if ($this->isIsoFormat($value)) {
                $d = Carbon::parse($value);
            }
            if ($this->isSqlDate($value)) {
                $d = Carbon::createFromFormat('Y-m-d', $value);
            }
            if ($this->isFormDate($value)) {
                $d = Carbon::createFromFormat('d/m/Y', $value);
            }
            // * Could not parse date.
            if (!$d) {
                throw new \Exception("Could not parse date {$value} for attribute '{$attribute}'.");
            }
            if (!$d->lessThanOrEqualTo($MJ)) {
                throw new \RuntimeException('Users birthdate does not indicate he is an adult');
            }
        } catch (\RuntimeException $e) {
            $this->error_message = $this->error_message;
            return false;
        }//end try

        return true;
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return $this->error_message;
    }

    /**
     * Check if provided string is formatted for mysql
     *
     * @param string $date
     * @return boolean
     */
    private function isSqlDate(string $date)
    {
        if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/", $date)) {
            return true;
        }
        return false;
    }

    /**
     * Check if provided string is formatted DD/MM/AAAA
     *
     * @param string $date
     * @return boolean
     */
    private function isFormDate(string $date)
    {
        if (preg_match("/^(0[1-9]|[1-2][0-9]|3[0-1])\/(0[1-9]|1[0-2])\/[0-9]{4}$/", $date)) {
            return true;
        }
        return false;
    }

    /**
     * Check if provided string is iso format
     *
     * * https://www.w3.org/TR/NOTE-datetime
     *
     * @param string $date
     * @return boolean
     */
    private function isIsoFormat(string $date)
    {
        // phpcs:ignore Generic.Files.LineLength.TooLong
        if (preg_match("/^(\d{4})(?:-?W(\d+)(?:-?(\d+)D?)?|(?:-(\d+))?-(\d+))(?:[T ](\d+):(\d+)(?::(\d+)(?:\.(\d+))?)?)?(?:Z(-?\d*))?$/", $date)) {
            return true;
        }
        return false;
    }
}