<?php

namespace Modules\M3\Services;

use setasign\Fpdi\Fpdi;
use Storage;

class BillOfLadingService
{
    public function fillBillOfLading(array $data, ?string $outputPath = null): string
    {
        $templatePath = Storage::disk('public')->path('ETN-BOL2.pdf');
        $newFile = 'BOL_' . ($data['bol_number'] ?? 'unknown') . '.pdf';
        $outputPath ??= Storage::disk('public')->path($newFile);

        $pdf = new Fpdi;
        $pdf->setSourceFile($templatePath);

        $this->renderPage($pdf, $data, 1, true);
        $this->renderPage($pdf, $data, 2, false);
        $pdf->Output('F', $outputPath);

        return $outputPath;
    }

    private function renderPage(Fpdi $pdf, array $data, int $pageNumber, bool $includeLineDetails): void
    {
        $template = $pdf->importPage($pageNumber);
        $pdf->AddPage();
        $pdf->useTemplate($template);
        $pdf->SetFont('Helvetica', '', 10);
        $pdf->SetTextColor(0, 0, 0);

        foreach ($this->headerFields() as $field => [$x, $y]) {
            $this->writeField($pdf, $data, $field, $x, $y);
        }

        if ($includeLineDetails) {
            foreach ($this->lineFields() as $field => [$x, $y]) {
                $this->writeField($pdf, $data, $field, $x, $y);
            }
            $this->writeDescription($pdf, $data);
        }
    }

    private function writeField(Fpdi $pdf, array $data, string $field, float $x, float $y): void
    {
        if (! array_key_exists($field, $data) || $data[$field] === null || $data[$field] === '') {
            return;
        }

        $pdf->SetXY($x, $y);
        $pdf->Write(0, (string) $data[$field]);
    }

    private function writeDescription(Fpdi $pdf, array $data): void
    {
        $description = $data['description'] ?? null;
        if ($description === null || $description === '') {
            return;
        }

        $pdf->SetXY(28, 140);
        $pdf->MultiCell(67, 4.5, (string) $description, 0, 'L');
    }

    private function headerFields(): array
    {
        return [
            'bol_number' => [126, 44],
            'date' => [171, 44],
            'shipper_no' => [126, 53],
            'master_bill_no' => [172, 54],
            'master_bill_yes' => [183, 54],
            'master_bill_drops' => [194, 55],
            'consignor_name' => [21, 44],
            'consignor_address1' => [21, 48],
            'consignor_address2' => [21, 52],
            'consignor_address3' => [21, 56],
            'consignee_name' => [21, 72],
            'consignee_address1' => [21, 76],
            'consignee_address2' => [21, 80],
            'consignee_address3' => [21, 84],
            'freight_collect' => [127, 90],
            'carrier_name' => [10, 100],
        ];
    }

    private function lineFields(): array
    {
        return [
            'pieces' => [6, 142],
            'line_class' => [145, 142],
            'line_weight' => [177, 142],
            'total_pieces' => [6, 244],
            'total_line_weight' => [177, 244],
        ];
    }
}