<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2023. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Repositories;

use App\Events\Payment\PaymentWasCreated;
use App\Events\Payment\PaymentWasDeleted;
use App\Jobs\Credit\ApplyCreditPayment;
use App\Libraries\Currency\Conversion\CurrencyApi;
use App\Models\Client;
use App\Models\Credit;
use App\Models\Invoice;
use App\Models\Payment;
use App\Models\Paymentable;
use App\Utils\Ninja;
use App\Utils\Traits\MakesHash;
use App\Utils\Traits\SavesDocuments;
use Illuminate\Http\Request;
use Illuminate\Support\Carbon;

/**
 * PaymentRepository.
 */
class PaymentRepository extends BaseRepository
{
    use MakesHash;
    use SavesDocuments;

    protected $credit_repo;

    public function __construct(CreditRepository $credit_repo)
    {
        $this->credit_repo = $credit_repo;
    }

    /**
     * Saves and updates a payment. //todo refactor to handle refunds and payments.
     *
     * @param array   $data the request object
     * @param Payment $payment The Payment object
     * @return Payment|null Payment $payment
     */
    public function save(array $data, Payment $payment): ?Payment
    {
        return $this->applyPayment($data, $payment);
    }

    /**
     * Handles a positive payment request.
     * @param  array $data      The data object
     * @param  Payment $payment The $payment entity
     * @return Payment          The updated/created payment object
     */
    private function applyPayment(array $data, Payment $payment): ?Payment
    {
        $is_existing_payment = true;
        $client = false;

        //check currencies here and fill the exchange rate data if necessary
        if (! $payment->id) {
            $payment = $this->processExchangeRates($data, $payment);

            /* This is needed here otherwise the ->fill() overwrites anything that exists*/
            if ($payment->exchange_rate != 1) {
                unset($data['exchange_rate']);
            }

            $is_existing_payment = false;

            \DB::connection(config('database.default'))->transaction(function () use ($data) {
                $client = Client::query()->where('id', $data['client_id'])->withTrashed()->lockForUpdate()->first();

                /*We only update the paid to date ONCE per payment*/
                if (array_key_exists('invoices', $data) && is_array($data['invoices']) && count($data['invoices']) > 0) {
                    if ($data['amount'] == '') {
                        $data['amount'] = array_sum(array_column($data['invoices'], 'amount'));
                    }
                    
                    $client->service()->updatePaidToDate($data['amount'])->save();
                    $client->saveQuietly();
                } else {
                    //this fixes an edge case with unapplied payments
                    $client->service()->updatePaidToDate($data['amount'])->save();
                    // $client->paid_to_date += $data['amount'];
                    $client->saveQuietly();
                }

                if (array_key_exists('credits', $data) && is_array($data['credits']) && count($data['credits']) > 0) {
                    $_credit_totals = array_sum(array_column($data['credits'], 'amount'));

                    $client->service()->updatePaidToDate($_credit_totals)->save();
                    // $client->paid_to_date += $_credit_totals;
                    $client->saveQuietly();
                }
            }, 1);

            $client = Client::query()->where('id', $data['client_id'])->withTrashed()->first();

        }

        /*Fill the payment*/
        $payment->fill($data);
        $payment->is_manual = true;
        $payment->status_id = Payment::STATUS_COMPLETED;

        if ((!$payment->currency_id || $payment->currency_id == 0) && $client) {
            if (property_exists($client->settings, 'currency_id')) {
                $payment->currency_id = $client->settings->currency_id;
            } else {
                $payment->currency_id = $client->company->settings->currency_id;
            }
        }

        $payment->saveQuietly();

        /*Save documents*/
        if (array_key_exists('documents', $data)) {
            $this->saveDocuments($data['documents'], $payment);
        }

        /*Ensure payment number generated*/
        if (! $payment->number || strlen($payment->number) == 0) {
            // $payment->number = $payment->client->getNextPaymentNumber($payment->client, $payment);
            $payment->service()->applyNumber();
        }

        /*Set local total variables*/
        $invoice_totals = 0;
        $credit_totals = 0;

        /*Iterate through invoices and apply payments*/
        if (array_key_exists('invoices', $data) && is_array($data['invoices']) && count($data['invoices']) > 0) {
            $invoice_totals = array_sum(array_column($data['invoices'], 'amount'));

            $invoices = Invoice::withTrashed()->whereIn('id', array_column($data['invoices'], 'invoice_id'))->get();

            //todo optimize this into a single query
            foreach ($data['invoices'] as $paid_invoice) {
                $invoice = $invoices->firstWhere('id', $paid_invoice['invoice_id']);

                if ($invoice) {

                    //25-06-2023

                    $paymentable = new Paymentable();
                    $paymentable->payment_id = $payment->id;
                    $paymentable->paymentable_id = $invoice->id;
                    $paymentable->paymentable_type = 'invoices';
                    $paymentable->amount = $paid_invoice['amount'];
                    $paymentable->save();

                    $invoice = $invoice->service()
                                       ->markSent()
                                       ->applyPayment($payment, $paid_invoice['amount'])
                                       ->save();
                }
            }
        } else {

        }

        if (array_key_exists('credits', $data) && is_array($data['credits'])) {
            $credit_totals = array_sum(array_column($data['credits'], 'amount'));

            $credits = Credit::query()->whereIn('id', array_column($data['credits'], 'credit_id'))->get();

            //todo optimize into a single query
            foreach ($data['credits'] as $paid_credit) {

                /** @var \App\Models\Credit $credit **/
                $credit = $credits->firstWhere('id', $paid_credit['credit_id']);
                
                if ($credit) {

                    $paymentable = new Paymentable();
                    $paymentable->payment_id = $payment->id;
                    $paymentable->paymentable_id = $credit->id;
                    $paymentable->paymentable_type = Credit::class;
                    $paymentable->amount = $paid_credit['amount'];
                    $paymentable->save();

                    $credit = $credit->service()->markSent()->save();
                    (new ApplyCreditPayment($credit, $payment, $paid_credit['amount']))->handle();
                }
            }
        }

        if (! $is_existing_payment && ! $this->import_mode) {
            if (array_key_exists('email_receipt', $data) && $data['email_receipt'] == 'true') {
                $payment->service()->sendEmail();
            } elseif (!array_key_exists('email_receipt', $data) && $payment->client->getSetting('client_manual_payment_notification')) {
                $payment->service()->sendEmail();
            }

            event(new PaymentWasCreated($payment, $payment->company, Ninja::eventVars(auth()->user() ? auth()->user()->id : null)));
        }

        $payment->applied += ($invoice_totals - $credit_totals); //wont work because - check tests

        $payment->saveQuietly();

        return $payment->refresh();
    }

    /**
     * If the client is paying in a currency other than
     * the company currency, we need to set a record.
     * @param $data
     * @param $payment
     * @return Payment $payment
     */
    public function processExchangeRates($data, $payment)
    {
        if (array_key_exists('exchange_rate', $data) && isset($data['exchange_rate']) && $data['exchange_rate'] != 1) {
            return $payment;
        }

        $client = Client::withTrashed()->find($data['client_id']);

        $client_currency = $client->getSetting('currency_id');
        $company_currency = $client->company->settings->currency_id;

        if ($company_currency != $client_currency) {
            $exchange_rate = new CurrencyApi();

            $payment->exchange_rate = $exchange_rate->exchangeRate($client_currency, $company_currency, Carbon::parse($payment->date));
            $payment->exchange_currency_id = $company_currency;
            $payment->currency_id = $client_currency;

            return $payment;
        }
        
        $payment->currency_id = $company_currency;

        return $payment;
    }

    public function delete($payment)
    {
        //cannot double delete a payment
        if ($payment->is_deleted) {
            return;
        }

        $payment = $payment->service()->deletePayment();

        if ($payment) {
            event(new PaymentWasDeleted($payment, $payment->company, Ninja::eventVars(auth()->user() ? auth()->user()->id : null)));
        }

        return $payment;
    }

    public function restore($payment)
    {
        //we cannot restore a deleted payment.
        if ($payment->is_deleted) {
            return;
        }

        return parent::restore($payment);
    }
}