<?php

/**
 * FrontpageController.php
 * Copyright (c) 2019 james@firefly-iii.org
 *
 * This file is part of Firefly III (https://github.com/firefly-iii).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace FireflyIII\Http\Controllers\Json;

use FireflyIII\Exceptions\FireflyException;
use FireflyIII\Http\Controllers\Controller;
use FireflyIII\Models\PiggyBank;
use FireflyIII\Repositories\PiggyBank\PiggyBankRepositoryInterface;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Log;
use Throwable;

/**
 * Class FrontpageController.
 */
final class FrontpageController extends Controller
{
    /**
     * Piggy bank pie chart.
     *
     * @throws FireflyException
     */
    public function piggyBanks(PiggyBankRepositoryInterface $repository): JsonResponse
    {
        $set  = $repository->getPiggyBanks();
        $info = [];

        /** @var PiggyBank $piggyBank */
        foreach ($set as $piggyBank) {
            $amount   = $repository->getCurrentAmount($piggyBank);
            $pcAmount = $repository->getCurrentPrimaryCurrencyAmount($piggyBank);
            if (1 === bccomp($amount, '0')) {
                // percentage!
                $pct    = 0;
                if (0 !== bccomp((string) $piggyBank->target_amount, '0')) {
                    $pct = (int) bcmul(bcdiv($amount, (string) $piggyBank->target_amount), '100');
                }

                $entry  = [
                    'id'                              => $piggyBank->id,
                    'name'                            => $piggyBank->name,
                    'amount'                          => $amount,
                    'pc_amount'                       => $pcAmount,
                    'target'                          => $piggyBank->target_amount,
                    'pc_target'                       => $piggyBank->native_target_amount,
                    'percentage'                      => $pct,
                    // currency:
                    'currency_symbol'                 => $piggyBank->transactionCurrency->symbol,
                    'currency_decimal_places'         => $piggyBank->transactionCurrency->decimal_places,
                    'primary_currency_symbol'         => $this->primaryCurrency->symbol,
                    'primary_currency_decimal_places' => $this->primaryCurrency->decimal_places,
                ];

                $info[] = $entry;
            }
        }

        // sort by current percentage (lowest at the top)
        uasort($info, static fn (array $a, array $b): int => $a['percentage'] <=> $b['percentage']);

        $html = '';
        if (0 !== count($info)) {
            try {
                $convertToPrimary = $this->convertToPrimary;
                $primary          = $this->primaryCurrency;
                $html             = view('json.piggy-banks', [
                    'info'             => $info,
                    'convertToPrimary' => $convertToPrimary,
                    'primary'          => $primary,
                ])->render();
            } catch (Throwable $e) {
                Log::error(sprintf('Cannot render json.piggy-banks: %s', $e->getMessage()));
                Log::error($e->getTraceAsString());
                $html = sprintf('Could not render view: %s', $e->getMessage());

                throw new FireflyException($html, 0, $e);
            }
        }

        return response()->json(['html' => $html]);
    }
}
