<?php
/**
 * AmountFormat.php
 * Copyright (c) 2017 thegrumpydictator@gmail.com
 *
 * This file is part of Firefly III.
 *
 * Firefly III is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Firefly III is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Firefly III.  If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace FireflyIII\Support\Twig;

use FireflyIII\Models\Account as AccountModel;
use FireflyIII\Models\TransactionCurrency;
use Twig_Extension;
use Twig_SimpleFilter;
use Twig_SimpleFunction;

/**
 * Contains all amount formatting routines.
 */
class AmountFormat extends Twig_Extension
{
    /**
     * {@inheritdoc}
     */
    public function getFilters(): array
    {
        return [
            $this->formatAmount(),
            $this->formatAmountPlain(),
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function getFunctions(): array
    {
        return [
            $this->formatAmountByAccount(),
            $this->formatAmountBySymbol(),
            $this->formatDestinationAfter(),
            $this->formatDestinationBefore(),
            $this->formatSourceAfter(),
            $this->formatSourceBefore(),
            $this->formatAmountByCurrency(),
        ];
    }

    /**
     * Returns the name of the extension.
     *
     * @return string The extension name
     */
    public function getName(): string
    {
        return 'FireflyIII\Support\Twig\AmountFormat';
    }

    /**
     * @return Twig_SimpleFilter
     */
    protected function formatAmount(): Twig_SimpleFilter
    {
        return new Twig_SimpleFilter(
            'formatAmount',
            function (string $string): string {
                $currency = app('amount')->getDefaultCurrency();

                return app('amount')->formatAnything($currency, $string, true);
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * Will format the amount by the currency related to the given account.
     *
     * @return Twig_SimpleFunction
     */
    protected function formatAmountByAccount(): Twig_SimpleFunction
    {
        return new Twig_SimpleFunction(
            'formatAmountByAccount',
            function (AccountModel $account, string $amount, bool $coloured = true): string {
                $currencyId = intval($account->getMeta('currency_id'));

                if (0 !== $currencyId) {
                    $currency = TransactionCurrency::find($currencyId);

                    return app('amount')->formatAnything($currency, $amount, $coloured);
                }
                $currency = app('amount')->getDefaultCurrency();

                return app('amount')->formatAnything($currency, $amount, $coloured);
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * Will format the amount by the currency related to the given account.
     *
     * @return Twig_SimpleFunction
     */
    protected function formatAmountByCurrency(): Twig_SimpleFunction
    {
        return new Twig_SimpleFunction(
            'formatAmountByCurrency',
            function (TransactionCurrency $currency, string $amount, bool $coloured = true): string {
                return app('amount')->formatAnything($currency, $amount, $coloured);
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * Will format the amount by the currency related to the given account.
     *
     * @return Twig_SimpleFunction
     */
    protected function formatAmountBySymbol(): Twig_SimpleFunction
    {
        return new Twig_SimpleFunction(
            'formatAmountBySymbol',
            function (string $amount, string $symbol, int $decimalPlaces = 2, bool $coloured = true): string {
                $currency                 = new TransactionCurrency;
                $currency->symbol         = $symbol;
                $currency->decimal_places = $decimalPlaces;

                return app('amount')->formatAnything($currency, $amount, $coloured);
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * @return Twig_SimpleFilter
     */
    protected function formatAmountPlain(): Twig_SimpleFilter
    {
        return new Twig_SimpleFilter(
            'formatAmountPlain',
            function (string $string): string {
                $currency = app('amount')->getDefaultCurrency();

                return app('amount')->formatAnything($currency, $string, false);
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * @return Twig_SimpleFunction
     */
    protected function formatDestinationAfter(): Twig_SimpleFunction
    {
        return new Twig_SimpleFunction(
            'formatDestinationAfter',
            function (array $transaction): string {
                // build fake currency for main amount.
                $format                 = new TransactionCurrency;
                $format->decimal_places = $transaction['transaction_currency_dp'];
                $format->symbol         = $transaction['transaction_currency_symbol'];
                $string                 = app('amount')->formatAnything($format, $transaction['destination_account_after'], true);

                // also append foreign amount for clarity:
                if (null !== $transaction['foreign_destination_amount']) {
                    // build fake currency for foreign amount
                    $format                 = new TransactionCurrency;
                    $format->decimal_places = $transaction['foreign_currency_dp'];
                    $format->symbol         = $transaction['foreign_currency_symbol'];
                    $string                 .= ' (' . app('amount')->formatAnything($format, $transaction['foreign_destination_amount'], true) . ')';
                }

                return $string;
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * @return Twig_SimpleFunction
     */
    protected function formatDestinationBefore(): Twig_SimpleFunction
    {
        return new Twig_SimpleFunction(
            'formatDestinationBefore',
            function (array $transaction): string {
                // build fake currency for main amount.
                $format                 = new TransactionCurrency;
                $format->decimal_places = $transaction['transaction_currency_dp'];
                $format->symbol         = $transaction['transaction_currency_symbol'];

                return app('amount')->formatAnything($format, $transaction['destination_account_before'], true);
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * @return Twig_SimpleFunction
     */
    protected function formatSourceAfter(): Twig_SimpleFunction
    {
        return new Twig_SimpleFunction(
            'formatSourceAfter',
            function (array $transaction): string {
                // build fake currency for main amount.
                $format                 = new TransactionCurrency;
                $format->decimal_places = $transaction['transaction_currency_dp'];
                $format->symbol         = $transaction['transaction_currency_symbol'];
                $string                 = app('amount')->formatAnything($format, $transaction['source_account_after'], true);

                // also append foreign amount for clarity:
                if (null !== $transaction['foreign_source_amount']) {
                    // build fake currency for foreign amount
                    $format                 = new TransactionCurrency;
                    $format->decimal_places = $transaction['foreign_currency_dp'];
                    $format->symbol         = $transaction['foreign_currency_symbol'];
                    $string                 .= ' (' . app('amount')->formatAnything($format, $transaction['foreign_source_amount'], true) . ')';
                }

                return $string;
            },
            ['is_safe' => ['html']]
        );
    }

    /**
     * @return Twig_SimpleFunction
     */
    protected function formatSourceBefore(): Twig_SimpleFunction
    {
        return new Twig_SimpleFunction(
            'formatSourceBefore',
            function (array $transaction): string {
                // build fake currency for main amount.
                $format                 = new TransactionCurrency;
                $format->decimal_places = $transaction['transaction_currency_dp'];
                $format->symbol         = $transaction['transaction_currency_symbol'];

                return app('amount')->formatAnything($format, $transaction['source_account_before'], true);
            },
            ['is_safe' => ['html']]
        );
    }
}