<?php

/**
 * BillUpdateService.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\Services\Internal\Update;

use FireflyIII\Events\Model\Bill\UpdatedExistingBill;
use FireflyIII\Factory\TransactionCurrencyFactory;
use FireflyIII\Models\Bill;
use FireflyIII\Models\ObjectGroup;
use FireflyIII\Repositories\ObjectGroup\CreatesObjectGroups;
use FireflyIII\Services\Internal\Support\BillServiceTrait;
use FireflyIII\Support\Facades\Amount;
use FireflyIII\User;

/**
 * Class BillUpdateService
 */
class BillUpdateService
{
    use BillServiceTrait;
    use CreatesObjectGroups;

    protected User $user;

    public function update(Bill $bill, array $data): Bill
    {
        $this->user = $bill->user;
        $oldData    = $bill->toArray();

        if (array_key_exists('currency_id', $data) || array_key_exists('currency_code', $data)) {
            $factory                       = app(TransactionCurrencyFactory::class);
            $currency                      = $factory->find(
                (int) ($data['currency_id'] ?? null),
                $data['currency_code'] ?? null
            ) ?? Amount::getPrimaryCurrencyByUserGroup($bill->user->userGroup);

            // enable the currency if it isn't.
            $currency->enabled             = true;
            $currency->save();
            $bill->transaction_currency_id = $currency->id;
            $bill->save();
        }
        // update bill properties:
        $bill       = $this->updateBillProperties($bill, $data);
        $bill->save();
        $bill->refresh();
        // update note:
        if (array_key_exists('notes', $data)) {
            $this->updateNote($bill, (string) $data['notes']);
        }

        // update order.
        if (array_key_exists('order', $data)) {
            // update the order of the piggy bank:
            $oldOrder = $bill->order;
            $newOrder = (int) ($data['order'] ?? $oldOrder);
            if ($oldOrder !== $newOrder) {
                $this->updateOrder($bill, $oldOrder, $newOrder);
            }
        }

        // update using name:
        if (array_key_exists('object_group_title', $data)) {
            $objectGroupTitle = $data['object_group_title'] ?? '';
            if ('' !== $objectGroupTitle) {
                $objectGroup = $this->findOrCreateObjectGroup($objectGroupTitle);
                if ($objectGroup instanceof ObjectGroup) {
                    $bill->objectGroups()->sync([$objectGroup->id]);
                    $bill->save();
                }

                return $bill;
            }
            // remove if name is empty. Should be overruled by ID.
            $bill->objectGroups()->sync([]);
            $bill->save();
        }
        if (array_key_exists('object_group_id', $data)) {
            // try also with ID:
            $objectGroupId = (int) ($data['object_group_id'] ?? 0);
            if (0 !== $objectGroupId) {
                $objectGroup = $this->findObjectGroupById($objectGroupId);
                if ($objectGroup instanceof ObjectGroup) {
                    $bill->objectGroups()->sync([$objectGroup->id]);
                    $bill->save();
                }

                return $bill;
            }
            $bill->objectGroups()->sync([]);
            $bill->save();
        }
        event(new UpdatedExistingBill($bill, $oldData));

        return $bill;
    }

    /**
     * @SuppressWarnings("PHPMD.NPathComplexity")
     */
    private function updateBillProperties(Bill $bill, array $data): Bill
    {
        if (array_key_exists('name', $data) && '' !== (string) $data['name']) {
            $bill->name = $data['name'];
        }

        if (array_key_exists('amount_min', $data) && '' !== (string) $data['amount_min']) {
            $bill->amount_min = $data['amount_min'];
        }
        if (array_key_exists('amount_max', $data) && '' !== (string) $data['amount_max']) {
            $bill->amount_max = $data['amount_max'];
        }
        if (array_key_exists('date', $data) && '' !== (string) $data['date']) {
            $bill->date    = $data['date'];
            $bill->date_tz = $data['date']->format('e');
        }
        if (array_key_exists('repeat_freq', $data) && '' !== (string) $data['repeat_freq']) {
            $bill->repeat_freq = $data['repeat_freq'];
        }
        if (array_key_exists('skip', $data)) {
            $bill->skip = $data['skip'];
        }
        if (array_key_exists('active', $data)) {
            $bill->active = $data['active'];
        }
        if (array_key_exists('end_date', $data)) {
            $bill->end_date    = $data['end_date'];
            $bill->end_date_tz = $data['end_date']?->format('e');
        }
        if (array_key_exists('extension_date', $data)) {
            $bill->extension_date    = $data['extension_date'];
            $bill->extension_date_tz = $data['extension_date']?->format('e');
        }

        $bill->match     = 'EMPTY';
        $bill->automatch = true;
        $bill->save();

        return $bill;
    }

    private function updateOrder(Bill $bill, int $oldOrder, int $newOrder): void
    {
        if ($newOrder > $oldOrder) {
            $this->user
                ->bills()
                ->where('order', '<=', $newOrder)
                ->where('order', '>', $oldOrder)
                ->where('bills.id', '!=', $bill->id)
                ->decrement('bills.order')
            ;
            $bill->order = $newOrder;
            $bill->save();
        }
        if ($newOrder < $oldOrder) {
            $this->user
                ->bills()
                ->where('order', '>=', $newOrder)
                ->where('order', '<', $oldOrder)
                ->where('bills.id', '!=', $bill->id)
                ->increment('bills.order')
            ;
            $bill->order = $newOrder;
            $bill->save();
        }
    }
}