<?php

/**
 * BulkController.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\Transaction;

use FireflyIII\Events\Model\TransactionGroup\TransactionGroupEventFlags;
use FireflyIII\Events\Model\TransactionGroup\TransactionGroupEventObjects;
use FireflyIII\Events\Model\TransactionGroup\UpdatedSingleTransactionGroup;
use FireflyIII\Events\Model\Webhook\WebhookMessagesRequestSending;
use FireflyIII\Http\Controllers\Controller;
use FireflyIII\Http\Requests\BulkEditJournalRequest;
use FireflyIII\Models\TransactionJournal;
use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
use FireflyIII\Repositories\Journal\JournalRepositoryInterface;
use FireflyIII\Support\Facades\Preferences;
use Illuminate\Contracts\View\Factory;
use Illuminate\Http\RedirectResponse;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Log;
use Illuminate\View\View;

/**
 * Class BulkController
 */
final class BulkController extends Controller
{
    private JournalRepositoryInterface $repository;

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

        $this->middleware(function ($request, $next) {
            $this->repository = app(JournalRepositoryInterface::class);
            app('view')->share('title', (string) trans('firefly.transactions'));
            app('view')->share('mainTitleIcon', 'bi-shuffle');

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

    /**
     * Edit a set of journals in bulk.
     *
     * TODO user wont be able to tell if the journal is part of a split.
     *
     * @return Factory|View
     */
    public function edit(array $journals): Factory|\Illuminate\Contracts\View\View
    {
        $subTitle    = (string) trans('firefly.mass_bulk_journals');

        $this->rememberPreviousUrl('transactions.bulk-edit.url');

        // make amounts positive.

        // get list of budgets:
        /** @var BudgetRepositoryInterface $budgetRepos */
        $budgetRepos = app(BudgetRepositoryInterface::class);
        $budgetList  = app('expandedform')->makeSelectListWithEmpty($budgetRepos->getActiveBudgets());

        return view('transactions.bulk.edit', ['journals' => $journals, 'subTitle' => $subTitle, 'budgetList' => $budgetList]);
    }

    /**
     * Update all journals.
     */
    public function update(BulkEditJournalRequest $request): RedirectResponse
    {
        $journalIds     = $request->input('journals');
        $journalIds     = is_array($journalIds) ? $journalIds : [];
        $ignoreCategory = 1 === (int) $request->input('ignore_category');
        $ignoreBudget   = 1 === (int) $request->input('ignore_budget');
        $tagsAction     = $request->input('tags_action');
        $collection     = new Collection();
        $count          = 0;

        foreach ($journalIds as $journalId) {
            $journalId = (int) $journalId;
            $journal   = $this->repository->find($journalId);
            if (null !== $journal) {
                $resultA = $this->updateJournalBudget($journal, $ignoreBudget, $request->integer('budget_id'));
                $resultB = $this->updateJournalTags($journal, $tagsAction, explode(',', $request->convertString('tags')));
                $resultC = $this->updateJournalCategory($journal, $ignoreCategory, $request->convertString('category'));
                if ($resultA || $resultB || $resultC) {
                    ++$count;
                    $collection->push($journal);
                }
            }
        }

        $flags          = new TransactionGroupEventFlags();
        $objects        = new TransactionGroupEventObjects();

        // run rules on changed journals:
        /** @var TransactionJournal $journal */
        foreach ($collection as $journal) {
            $objects->appendFromTransactionGroup($journal->transactionGroup);
        }
        event(new UpdatedSingleTransactionGroup($flags, $objects));
        event(new WebhookMessagesRequestSending());

        Preferences::mark();
        $request->session()->flash('success', trans_choice('firefly.mass_edited_transactions_success', $count));

        // redirect to previous URL:
        return redirect($this->getPreviousUrl('transactions.bulk-edit.url'));
    }

    private function updateJournalBudget(TransactionJournal $journal, bool $ignoreUpdate, int $budgetId): bool
    {
        if ($ignoreUpdate) {
            return false;
        }
        Log::debug(sprintf('Set budget to %d', $budgetId));
        $this->repository->updateBudget($journal, $budgetId);

        return true;
    }

    private function updateJournalCategory(TransactionJournal $journal, bool $ignoreUpdate, string $category): bool
    {
        if ($ignoreUpdate) {
            return false;
        }
        Log::debug(sprintf('Set budget to %s', $category));
        $this->repository->updateCategory($journal, $category);

        return true;
    }

    private function updateJournalTags(TransactionJournal $journal, string $action, array $tags): bool
    {
        if ('do_replace' === $action) {
            Log::debug(sprintf('Set tags to %s', implode(',', $tags)));
            $this->repository->updateTags($journal, $tags);
        }
        if ('do_append' === $action) {
            $existing = $journal->tags->pluck('tag')->toArray();
            $new      = array_unique(array_merge($tags, $existing));
            $this->repository->updateTags($journal, $new);
        }

        return true;
    }
}
