<?php
namespace DayTidy\Render;

use DayTidy\Data\Currencies;
use DayTidy\Entities\Offering;
use DayTidy\Interfaces\Renderable;
use Webilia\WP\Helpers\Arr;

class Price implements Renderable
{
    const ZERO_DECIMAL_CURRENCIES = [
        'BIF',
        'CLP',
        'DJF',
        'GNF',
        'JPY',
        'KMF',
        'KRW',
        'MGA',
        'PYG',
        'RWF',
        'UGX',
        'VND',
        'VUV',
        'XAF',
        'XOF',
        'XPF',
    ];

    private float $amount;

    private string $currency;

    private string $position;

    /**
     * Constructor
     *
     * @param float $amount
     * @param string $currency
     * @param string $position
     */
    public function __construct(float $amount = 0, string $currency = 'USD', string $position = 'before')
    {
        $this->amount = self::normalize($amount);
        $this->currency = $currency;
        $this->position = $position;
    }

    public static function normalize(float $amount): float
    {
        return round($amount, 2);
    }

    public static function decimals(string $currency = ''): int
    {
        return in_array(strtoupper($currency), self::ZERO_DECIMAL_CURRENCIES, true) ? 0 : 2;
    }

    public static function value(float $amount, string $currency = ''): string
    {
        return number_format(self::normalize($amount), self::decimals($currency), '.', '');
    }

    public function setAmount(float $amount): Price
    {
        $this->amount = self::normalize($amount);
        return $this;
    }

    public function setCurrency(string $currency): Price
    {
        $this->currency = $currency;
        return $this;
    }

    public function setPosition(string $position): Price
    {
        $this->position = $position;
        return $this;
    }

    public function byOffering(Offering $offering): Price
    {
        $this->setCurrency($offering->getCurrency());
        $this->setPosition($offering->getCurrencyPosition());

        return $this;
    }

    /**
     * Get Currency Sign
     *
     * @param string $currency
     * @return string
     */
    public static function sign(string $currency): string
    {
        $currencies = Currencies::get();
        $sign = Arr::truthy($currencies, $currency) ? $currencies[$currency] : $currency;

        return apply_filters('DayTidy/F__DayTidy/Render/Price__sign/sign', $sign, $currency, $currencies);
    }

    public function render(): string
    {
        $thousand_separator = ',';
        $decimal_separator = '.';

        // Rendered Price
        $rendered = number_format($this->amount, 2, $decimal_separator, $thousand_separator);

        // Currency Sign
        $sign = $this->sign($this->currency);

        // Add Currency Sign
        if ($this->position === Currencies::POSITION_AFTER) $rendered = $rendered . $sign;
        else if ($this->position == Currencies::POSITION_AFTER_WITH_SPACE) $rendered = $rendered . ' ' . $sign;
        else if ($this->position == Currencies::POSITION_BEFORE_WITH_SPACE) $rendered = $sign . ' ' . $rendered;
        else $rendered = $sign . $rendered;

        // Return Rendered Price
        return $rendered;
    }
}