<?php

/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2025. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Export\CSV;

use App\Export\Decorators\Decorator;
use App\Libraries\MultiDB;
use App\Models\Company;
use App\Models\Invoice;
use App\Transformers\InvoiceTransformer;
use App\Utils\Ninja;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\App;
use League\Csv\Writer;

class InvoiceExport extends BaseExport
{
    private $invoice_transformer;

    public string $date_key = 'date';

    public Writer $csv;

    private Decorator $decorator;

    private array $tax_names = [];

    public function __construct(Company $company, array $input)
    {
        $this->company = $company;
        $this->input = $input;
        $this->invoice_transformer = new InvoiceTransformer();
        $this->decorator = new Decorator();
    }

    public function init(): Builder
    {

        MultiDB::setDb($this->company->db);
        App::forgetInstance('translator');
        App::setLocale($this->company->locale());
        $t = app('translator');
        $t->replace(Ninja::transformTranslations($this->company->settings));

        if (count($this->input['report_keys']) == 0) {
            $this->input['report_keys'] = array_values($this->invoice_report_keys);
        }

        $this->input['report_keys'] = array_merge($this->input['report_keys'], array_diff($this->forced_client_fields, $this->input['report_keys']));

        $query = Invoice::query()
                        ->withTrashed()
                        ->with('client')
                        ->whereHas('client', function ($q) {
                            $q->where('is_deleted', false);
                        })
                        ->where('company_id', $this->company->id);


        if (!$this->input['include_deleted'] ?? false) {// @phpstan-ignore-line
            $query->where('is_deleted', 0);
        }

        $query = $this->addDateRange($query, 'invoices');

        $clients = &$this->input['client_id'];

        if ($clients) {
            $query = $this->addClientFilter($query, $clients);
        }

        if ($this->input['status'] ?? false) {
            $query = $this->addInvoiceStatusFilter($query, $this->input['status']);
        }

        $query = $this->filterByUserPermissions($query);

        
        if ($this->input['document_email_attachment'] ?? false) {
            $this->queueDocuments($query);
        }

        if ($this->input['pdf_email_attachment'] ?? false) {
            $this->queuePdfs($query);
        }

        return $query;

    }

    public function returnJson()
    {
        $query = $this->init();

        $headerdisplay = $this->buildHeader();

        $header = collect($this->input['report_keys'])->map(function ($key, $value) use ($headerdisplay) {
            return ['identifier' => $key, 'display_value' => $headerdisplay[$value]];
        })->toArray();

        $report = $query->cursor()
                ->map(function ($resource) {

                    /** @var \App\Models\Invoice $resource */
                    $row = $this->buildRow($resource);
                    return $this->processMetaData($row, $resource);
                })->toArray();

        return array_merge(['columns' => $header], $report);
    }

    public function run()
    {
        $query = $this->init();

        //load the CSV document from a string
        $this->csv = Writer::fromString();
        \League\Csv\CharsetConverter::addTo($this->csv, 'UTF-8', 'UTF-8');

        if ($tax_amount_position = array_search('invoice.total_taxes', $this->input['report_keys'])) {
            $first_part = array_slice($this->input['report_keys'], 0, $tax_amount_position + 1);
            $second_part = array_slice($this->input['report_keys'], $tax_amount_position + 1);
            $labels = [];

            $this->tax_names = $query->get()
                ->flatMap(function ($invoice) {
                    $taxes = [];

                    /** @var \App\Models\Invoice $invoice */
                    // Invoice level taxes
                    if (strlen($invoice->tax_name1 ?? '') > 1 && $invoice->tax_rate1 > 0) {
                        $taxes[] = trim($invoice->tax_name1) . ' ' . \App\Utils\Number::formatValueNoTrailingZeroes(floatval($invoice->tax_rate1), $invoice->client) . '%';
                    }
                    if (strlen($invoice->tax_name2 ?? '') > 1 && $invoice->tax_rate2 > 0) {
                        $taxes[] = trim($invoice->tax_name2) . ' ' . \App\Utils\Number::formatValueNoTrailingZeroes(floatval($invoice->tax_rate2), $invoice->client) . '%';
                    }
                    if (strlen($invoice->tax_name3 ?? '') > 1 && $invoice->tax_rate3 > 0) {
                        $taxes[] = trim($invoice->tax_name3) . ' ' . \App\Utils\Number::formatValueNoTrailingZeroes(floatval($invoice->tax_rate3), $invoice->client) . '%';
                    }

                    // Line item taxes
                    $line_taxes = collect($invoice->line_items)->flatMap(function ($item) use ($invoice) {
                        $taxes = [];
                        if (strlen($item->tax_name1 ?? '') > 1 && $item->tax_rate1 > 0) {
                            $taxes[] = trim($item->tax_name1) . ' ' . \App\Utils\Number::formatValueNoTrailingZeroes(floatval($item->tax_rate1), $invoice->client) . '%';
                        }
                        if (strlen($item->tax_name2 ?? '') > 1 && $item->tax_rate2 > 0) {
                            $taxes[] = trim($item->tax_name2) . ' ' . \App\Utils\Number::formatValueNoTrailingZeroes(floatval($item->tax_rate2), $invoice->client) . '%';
                        }
                        if (strlen($item->tax_name3 ?? '') > 1 && $item->tax_rate3 > 0) {
                            $taxes[] = trim($item->tax_name3) . ' ' . \App\Utils\Number::formatValueNoTrailingZeroes(floatval($item->tax_rate3), $invoice->client) . '%';
                        }
                        return $taxes;
                    });

                    return array_merge($taxes, $line_taxes->toArray());
                })
                ->unique()
                ->toArray();


            foreach ($this->tax_names as $tax_name) {
                $labels[] = 'tax.'.$tax_name;
            }

            $this->input['report_keys'] = array_merge($first_part, $labels, $second_part);
        }

        //insert the header
        $this->csv->insertOne($this->buildHeader());

        $query->cursor()
            ->each(function ($invoice) {

                /** @var \App\Models\Invoice $invoice */
                $this->csv->insertOne($this->buildRow($invoice));
            });

        return $this->csv->toString();
    }

    private function buildRow(Invoice $invoice): array
    {
        $transformed_invoice = $this->invoice_transformer->transform($invoice);

        $entity = [];

        foreach (array_values($this->input['report_keys']) as $key) {

            $parts = explode('.', $key);

            if (is_array($parts) && $parts[0] == 'invoice' && array_key_exists($parts[1], $transformed_invoice)) {
                $entity[$key] = $transformed_invoice[$parts[1]];
            } elseif ($decorated_value = $this->decorator->transform($key, $invoice)) {
                $entity[$key] = $decorated_value;
            } else {
                $entity[$key] = '';
            }

        }

        
        if (count($this->tax_names) > 0) {

            $calc = $invoice->calc();
            $taxes = $calc->getTaxMap()->merge($calc->getTotalTaxMap())->toArray();

            foreach ($this->tax_names as $tax_name) {
                $entity[$tax_name] = 0;
            }

            foreach ($taxes as $tax) {
                $entity[$tax['name']] = ($entity[$tax['name']] ?? 0) + $tax['total'];
            }
        }

        $entity = $this->decorateAdvancedFields($invoice, $entity);

        return  $this->convertFloats($entity);
    }

    private function decorateAdvancedFields(Invoice $invoice, array $entity): array
    {

        if (in_array('invoice.project', $this->input['report_keys'])) {
            $entity['invoice.project'] = $invoice->project ? $invoice->project->name : '';
        }

        if (in_array('invoice.recurring_id', $this->input['report_keys'])) {
            $entity['invoice.recurring_id'] = $invoice->recurring_invoice->number ?? '';
        }

        if (in_array('invoice.auto_bill_enabled', $this->input['report_keys'])) {
            $entity['invoice.auto_bill_enabled'] = $invoice->auto_bill_enabled ? ctrans('texts.yes') : ctrans('texts.no');
        }

        if (in_array('invoice.assigned_user_id', $this->input['report_keys'])) {
            $entity['invoice.assigned_user_id'] = $invoice->assigned_user ? $invoice->assigned_user->present()->name() : '';
        }

        if (in_array('invoice.user_id', $this->input['report_keys'])) {
            $entity['invoice.user_id'] = $invoice->user ? $invoice->user->present()->name() : ''; // @phpstan-ignore-line

        }

        return $entity;
    }
}