<?php

/**
 * OperationsController.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\Report;

use Carbon\Carbon;
use FireflyIII\Exceptions\FireflyException;
use FireflyIII\Http\Controllers\Controller;
use FireflyIII\Repositories\Account\AccountTaskerInterface;
use FireflyIII\Support\CacheProperties;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Log;
use Throwable;

/**
 * Class OperationsController.
 */
final class OperationsController extends Controller
{
    /** @var AccountTaskerInterface Some specific account things. */
    private $tasker;

    /**
     * OperationsController constructor.
     */
    public function __construct()
    {
        parent::__construct();

        // translations:
        $this->middleware(function ($request, $next) {
            $this->tasker = app(AccountTaskerInterface::class);

            return $next($request);
        });
    }

    /**
     * View of income and expense.
     *
     * @return mixed|string
     *
     * @throws FireflyException
     */
    public function expenses(Collection $accounts, Carbon $start, Carbon $end)
    {
        // chart properties for cache:
        $cache           = new CacheProperties();
        $cache->addProperty($start);
        $cache->addProperty($end);
        $cache->addProperty('expense-report');
        $cache->addProperty($accounts->pluck('id')->toArray());
        if ($cache->has()) {
            return $cache->get();
        }
        $report          = $this->tasker->getExpenseReport($start, $end, $accounts);
        $type            = 'expense-entry';
        $incomeTopLength = count($report['accounts']);

        try {
            $result = view('reports.partials.income-expenses', ['report' => $report, 'type' => $type, 'incomeTopLength' => $incomeTopLength])->render();
        } catch (Throwable $e) {
            Log::error(sprintf('Could not render reports.partials.income-expense: %s', $e->getMessage()));
            Log::error($e->getTraceAsString());
            $result = sprintf('Could not render view: %s', $e->getMessage());

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

        $cache->store($result);

        return $result;
    }

    /**
     * View of income.
     *
     * @throws FireflyException
     */
    public function income(Collection $accounts, Carbon $start, Carbon $end): string
    {
        // chart properties for cache:
        $cache  = new CacheProperties();
        $cache->addProperty($start);
        $cache->addProperty($end);
        $cache->addProperty('income-report');
        $cache->addProperty($accounts->pluck('id')->toArray());
        if ($cache->has()) {
            return $cache->get();
        }
        $report = $this->tasker->getIncomeReport($start, $end, $accounts);
        $type   = 'income-entry';

        try {
            $result = view('reports.partials.income-expenses', ['report' => $report, 'type' => $type])->render();
        } catch (Throwable $e) {
            Log::error(sprintf('Could not render reports.partials.income-expenses: %s', $e->getMessage()));
            Log::error($e->getTraceAsString());
            $result = sprintf('Could not render view: %s', $e->getMessage());

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

        $cache->store($result);

        return $result;
    }

    /**
     * Overview of income and expense.
     *
     * @return mixed|string
     *
     * @throws FireflyException
     */
    public function operations(Collection $accounts, Carbon $start, Carbon $end)
    {
        // chart properties for cache:
        $cache    = new CacheProperties();
        $cache->addProperty($start);
        $cache->addProperty($end);
        $cache->addProperty('inc-exp-report');
        $cache->addProperty($accounts->pluck('id')->toArray());
        if ($cache->has()) {
            return $cache->get();
        }

        $incomes  = $this->tasker->getIncomeReport($start, $end, $accounts);
        $expenses = $this->tasker->getExpenseReport($start, $end, $accounts);
        $sums     = [];
        $keys     = array_unique(array_merge(array_keys($incomes['sums']), array_keys($expenses['sums'])));

        /** @var int $currencyId */
        foreach ($keys as $currencyId) {
            $currencyInfo             = $incomes['sums'][$currencyId] ?? $expenses['sums'][$currencyId];
            $sums[$currencyId] ??= [
                'currency_id'             => $currencyId,
                'currency_name'           => $currencyInfo['currency_name'],
                'currency_code'           => $currencyInfo['currency_code'],
                'currency_symbol'         => $currencyInfo['currency_symbol'],
                'currency_decimal_places' => $currencyInfo['currency_decimal_places'],
                'in'                      => $incomes['sums'][$currencyId]['sum'] ?? '0',
                'out'                     => $expenses['sums'][$currencyId]['sum'] ?? '0',
                'sum'                     => '0',
            ];
            $sums[$currencyId]['sum'] = bcadd($sums[$currencyId]['in'], $sums[$currencyId]['out']);
        }

        try {
            $result = view('reports.partials.operations', ['sums' => $sums])->render();
        } catch (Throwable $e) {
            Log::error(sprintf('Could not render reports.partials.operations: %s', $e->getMessage()));
            Log::error($e->getTraceAsString());
            $result = sprintf('Could not render view: %s', $e->getMessage());

            throw new FireflyException($result, 0, $e);
        }
        $cache->store($result);

        return $result;
    }
}
