<?php

/**
 * AccountTransformer.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\Transformers;

use Carbon\Carbon;
use FireflyIII\Exceptions\FireflyException;
use FireflyIII\Models\Account;
use FireflyIII\Models\TransactionCurrency;
use FireflyIII\Repositories\Account\AccountRepositoryInterface;
use FireflyIII\Support\Facades\Amount;

/**
 * Class AccountTransformer
 */
class AccountTransformer extends AbstractTransformer
{
    protected bool $convertToPrimary;
    protected TransactionCurrency $primary;
    protected AccountRepositoryInterface $repository;

    /**
     * AccountTransformer constructor.
     */
    public function __construct()
    {
        $this->repository       = app(AccountRepositoryInterface::class);
        $this->convertToPrimary = Amount::convertToPrimary();
        $this->primary          = Amount::getPrimaryCurrency();
    }

    /**
     * Transform the account.
     *
     * @throws FireflyException
     */
    public function transform(Account $account): array
    {
        if (null === $account->meta) {
            $account->meta = ['currency' => null];
        }

        // get account type:
        $accountType                           = (string) config(sprintf('firefly.shortNamesByFullName.%s', $account->full_account_type));
        $liabilityType                         = (string) config(sprintf('firefly.shortLiabilityNameByFullName.%s', $account->full_account_type));
        $liabilityType                         = '' === $liabilityType ? null : strtolower($liabilityType);
        $liabilityDirection                    = $account->meta['liability_direction'] ?? null;
        $accountRole                           = $this->getAccountRole($account, $accountType);
        $hasCurrencySettings                   = null !== $account->meta['currency'];
        $includeNetWorth                       = 1 === (int) ($account->meta['include_net_worth'] ?? 0);
        $longitude                             = $account->meta['location']['longitude'] ?? null;
        $latitude                              = $account->meta['location']['latitude'] ?? null;
        $zoomLevel                             = $account->meta['location']['zoom_level'] ?? null;
        $order                                 = $account->order;

        // get primary currency as fallback:
        $currency                              = $this->primary; // assume primary currency
        if ($hasCurrencySettings) {
            $currency = $account->meta['currency'];
        }

        // no order for some accounts:
        if (!in_array(strtolower($accountType), ['liability', 'liabilities', 'asset'], strict: true)) {
            $order = null;
        }

        // get some listed information from the account meta-data:
        [$creditCardType, $monthlyPaymentDate] = $this->getCCInfo($account, $accountRole, $accountType);
        $openingBalanceDate                    = $this->getOpeningBalance($account, $accountType);
        [$interest, $interestPeriod]           = $this->getInterest($account, $accountType);

        return [
            'id'                              => (string) $account->id,
            'created_at'                      => $account->created_at->toAtomString(),
            'updated_at'                      => $account->updated_at->toAtomString(),
            'active'                          => $account->active,
            'order'                           => $order,
            'name'                            => $account->name,
            'type'                            => strtolower($accountType),
            'account_role'                    => $accountRole,

            'object_group_id'                 => $account->meta['object_group_id'],
            'object_group_order'              => $account->meta['object_group_order'],
            'object_group_title'              => $account->meta['object_group_title'],

            // currency information, structured for 6.3.0.
            'object_has_currency_setting'     => $hasCurrencySettings,

            // currency is object specific or primary, already determined above.
            'currency_id'                     => (string) $currency['id'],
            'currency_name'                   => $currency['name'],
            'currency_code'                   => $currency['code'],
            'currency_symbol'                 => $currency['symbol'],
            'currency_decimal_places'         => $currency['decimal_places'],

            'primary_currency_id'             => (string) $this->primary->id,
            'primary_currency_name'           => $this->primary->name,
            'primary_currency_code'           => $this->primary->code,
            'primary_currency_symbol'         => $this->primary->symbol,
            'primary_currency_decimal_places' => $this->primary->decimal_places,

            // balances, structured for 6.3.0.
            'current_balance'                 => $account->meta['balances']['current_balance'],
            'pc_current_balance'              => $account->meta['balances']['pc_current_balance'],

            'opening_balance'                 => $account->meta['balances']['opening_balance'],
            'pc_opening_balance'              => $account->meta['balances']['pc_opening_balance'],

            'virtual_balance'                 => $account->meta['balances']['virtual_balance'],
            'pc_virtual_balance'              => $account->meta['balances']['pc_virtual_balance'],

            'debt_amount'                     => $account->meta['balances']['debt_amount'],
            'pc_debt_amount'                  => $account->meta['balances']['pc_debt_amount'],

            'balance_difference'              => $account->meta['balances']['balance_difference'],
            'pc_balance_difference'           => $account->meta['balances']['pc_balance_difference'],

            'current_balance_date'            => $account->meta['current_balance_date']->toAtomString(),
            'notes'                           => $account->meta['notes'] ?? null,
            'monthly_payment_date'            => $monthlyPaymentDate,
            'credit_card_type'                => $creditCardType,
            'account_number'                  => $account->meta['account_number'],
            'iban'                            => '' === $account->iban ? null : $account->iban,
            'bic'                             => $account->meta['BIC'] ?? null,
            'opening_balance_date'            => $openingBalanceDate,
            'liability_type'                  => $liabilityType,
            'liability_direction'             => $liabilityDirection,
            'interest'                        => $interest,
            'interest_period'                 => $interestPeriod,
            'include_net_worth'               => $includeNetWorth,
            'longitude'                       => $longitude,
            'latitude'                        => $latitude,
            'zoom_level'                      => $zoomLevel,
            'last_activity'                   => $account->meta['last_activity']?->toAtomString(),
            'links'                           => [['rel' => 'self', 'uri' => sprintf('/accounts/%d', $account->id)]],
        ];
    }

    private function getAccountRole(Account $account, string $accountType): ?string
    {
        $accountRole = $account->meta['account_role'] ?? null;
        if ('asset' !== $accountType || '' === (string) $accountRole) {
            return null;
        }

        return $accountRole;
    }

    private function getCCInfo(Account $account, ?string $accountRole, string $accountType): array
    {
        $monthlyPaymentDate = null;
        $creditCardType     = null;
        if ('ccAsset' === $accountRole && 'asset' === $accountType) {
            $creditCardType     = $account->meta['cc_type'] ?? null;
            $monthlyPaymentDate = $account->meta['cc_monthly_payment_date'] ?? null;
        }
        if (null !== $monthlyPaymentDate) {
            // try classic date:
            if (10 === strlen($monthlyPaymentDate)) {
                $object             = Carbon::createFromFormat('!Y-m-d', $monthlyPaymentDate, config('app.timezone'));
                if (!$object instanceof Carbon) {
                    $object = today(config('app.timezone'));
                }
                $monthlyPaymentDate = $object->toAtomString();
            }
            if (10 !== strlen((string) $monthlyPaymentDate)) {
                $monthlyPaymentDate = Carbon::parse($monthlyPaymentDate, config('app.timezone'))->toAtomString();
            }
        }

        return [$creditCardType, $monthlyPaymentDate];
    }

    private function getInterest(Account $account, string $accountType): array
    {
        $interest       = null;
        $interestPeriod = null;
        if ('liabilities' === $accountType) {
            $interest       = $account->meta['interest'] ?? null;
            $interestPeriod = $account->meta['interest_period'] ?? null;
        }

        return [$interest, $interestPeriod];
    }

    private function getOpeningBalance(Account $account, string $accountType): ?string
    {
        $openingBalanceDate = null;
        if (in_array($accountType, ['asset', 'liabilities'], true)) {
            $openingBalanceDate = $account->meta['opening_balance_date'] ?? null;
        }
        if (null !== $openingBalanceDate) {
            $object             = Carbon::createFromFormat('Y-m-d H:i:s', $openingBalanceDate, config('app.timezone'));
            if (!$object instanceof Carbon) {
                $object = today(config('app.timezone'));
            }
            $openingBalanceDate = $object->toAtomString();
        }

        return $openingBalanceDate;
    }
}
