<?php

namespace App\Traits\Models;

use Illuminate\Support\Str;

trait HasCoordinates
{
    /**
     * Convert decimal coordinate to sexagesimal
     *
     * @param float   $value      Decimal coordinate (ex : 1.209333).
     * @param boolean $isLatitude Coordinates is a latitude ?.
     * @return string Coordinate in sexagesimal
     */
    private static function convertDecimalToDegree(float $value, bool $isLatitude): string
    {
        // Add cardinal point according to the axe (latitude or longitude) and the sign of the value.
        $point = $isLatitude ? (($value < 0) ? 'S' : 'N') : (($value < 0) ? 'W' : 'E');

        // Degrees.
        list($degree, $decimal) = explode('.', \number_format($value, 10));
        $degree                 = abs($degree);

        // Minutes.
        list($minute, $decimal) = explode('.', \number_format(\floatval('0.' . $decimal) * 60, 10));
        $minute                 = \str_pad($minute, 2, "0", STR_PAD_LEFT);

        // Seconds.
        $second = round(\floatval('0.' . $decimal) * 60, 1, PHP_ROUND_HALF_UP);
        $second = \str_pad(number_format($second, 1), 4, "0", STR_PAD_LEFT);

        return "{$degree}°{$minute}'{$second}\"{$point}";
    }

    /**
     * Convert sexagesimal coordinate to decimal
     *
     * @param string  $value      Sexagesimal coordinate (ex : 44°20'18.1"N).
     * @param boolean $isLatitude Coordinate is a latitude ?.
     * @return float  Coordinate in decimal
     * @throws \RuntimeException Not the good DMS format.
     */
    private static function convertDegreeToDecimal(string $value, bool $isLatitude): float
    {
        // Si c'est une latitude, alors le nombre positif correspond au Nord, sinon l'Est.
        $axe = $isLatitude ? 'N' : 'E';
        $re  = $isLatitude ?
            '/^([0-8]?\d)°([0-5]?\d)\'([0-5]?\d\.\d)"(N|S)$/i' :
            '/^([0-1]?[0-8]\d|\d?\d)°([0-5]?\d)\'([0-5]?\d\.\d)"(E|W|O)$/i';

        preg_match($re, $value, $matches);

        if (empty($matches)) {
            throw new \RuntimeException("Le format DMS n'est pas conforme '{$value}'");
        }

        list($value, $degree, $minutes, $seconds, $point) = $matches;

        // Si l'axe est Nord ou Est, alors le nombre est positif sinon i est négatif.
        $degreeDecimalValue = \floatval(\sprintf(
            '%s%s',
            Str::upper($point) === $axe ? '' : '-',
            round($degree + $minutes / 60 + $seconds / 3600, 6, PHP_ROUND_HALF_UP)
        ));

        return !$degreeDecimalValue ? abs($degreeDecimalValue) : $degreeDecimalValue;
    }

    /**
     * Get decimal shop's latitude and convert it to sexagesimal coordinate.
     *
     * @param float $value Decimal coordinate.
     * @return string $sexagesimalValue Sexagesimal coordinate
     */
    public function getLatitudeAttribute(float $value): string
    {
        return static::convertDecimalToDegree($value, true);
    }

    /**
     * Set decimal shop's latitude from sexagesimal coordinate.
     *
     * @param  string $value Sexagesimal coordinate.
     * @return void
     */
    public function setLatitudeAttribute(string $value): void
    {
        $this->attributes['latitude'] = static::convertDegreeToDecimal($value, true);
    }

    /**
     * Get decimal shop's longitude and convert it to sexagesimal coordinate.
     *
     * @param float $value Decimal coordinate.
     * @return string $sexagesimalValue Sexagesimal coordinate
     */
    public function getLongitudeAttribute(float $value)
    {
        return static::convertDecimalToDegree($value, false);
    }

    /**
     * Set decimal shop's longitude from sexagesimal coordinate.
     *
     * @param string $value Sexagesimal coordinate.
     * @return void
     */
    public function setLongitudeAttribute(string $value): void
    {
        $this->attributes['longitude'] = static::convertDegreeToDecimal($value, false);
    }
}