<?php

namespace App\Livewire\Invoices;

use App\Models\Invoice;
use Illuminate\Support\Facades\Log;
use Livewire\Attributes\Layout;
use Livewire\Component;

class Show extends Component
{
    public Invoice $invoice;

    public function mount(Invoice $invoice)
    {
        $this->invoice = $invoice->load([
            'customer',
            'branch',
            'createdBy',
            'serviceOrder.vehicle',
            'jobCard.vehicle',
            'estimate',
            'lineItems.part',
            'lineItems.serviceItem',
        ]);
    }

    public function downloadPDF()
    {
        try {
            // Generate HTML from the template
            $html = view('invoices.pdf', ['invoice' => $this->invoice])->render();

            if (empty($html)) {
                throw new \Exception('Failed to generate PDF template');
            }

            // Try different approaches for PDF generation
            try {
                // Approach 1: Use Laravel's PDF facade if available
                if (class_exists('\Barryvdh\DomPDF\Facade\Pdf')) {
                    $pdf = \Barryvdh\DomPDF\Facade\Pdf::loadHtml($html);
                    $pdf->setPaper('letter', 'portrait');
                    $output = $pdf->output();
                } else {
                    throw new \Exception('PDF facade not available');
                }
            } catch (\Exception $e1) {
                try {
                    // Approach 2: Direct DomPDF instantiation
                    $dompdf = new \Dompdf\Dompdf;
                    $dompdf->loadHtml($html);
                    $dompdf->setPaper('letter', 'portrait');
                    $dompdf->render();
                    $output = $dompdf->output();
                } catch (\Exception $e2) {
                    // Approach 3: Return HTML for now
                    $filename = 'invoice-'.$this->invoice->invoice_number.'.html';

                    return response()->streamDownload(function () use ($html) {
                        echo $html;
                    }, $filename, [
                        'Content-Type' => 'text/html',
                        'Content-Disposition' => 'attachment; filename="'.$filename.'"',
                    ]);
                }
            }

            // Create filename with invoice number
            $filename = 'invoice-'.$this->invoice->invoice_number.'.pdf';

            // Return PDF for download
            return response()->streamDownload(function () use ($output) {
                echo $output;
            }, $filename, [
                'Content-Type' => 'application/pdf',
                'Content-Disposition' => 'attachment; filename="'.$filename.'"',
            ]);

        } catch (\Exception $e) {
            // Log the error for debugging
            Log::error('PDF generation failed for invoice '.$this->invoice->id, [
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString(),
            ]);

            // Show user-friendly error message
            session()->flash('error', 'Failed to generate PDF: '.$e->getMessage());

            return null;
        }
    }

    public function markAsPaid()
    {
        if (! auth()->user()->can('update', $this->invoice)) {
            session()->flash('error', 'You do not have permission to update this invoice.');

            return;
        }

        $this->invoice->markAsPaid('manual', null, 'Marked as paid from invoice view');
        $this->invoice->refresh();
        session()->flash('success', 'Invoice marked as paid successfully.');
    }

    public function sendInvoice()
    {
        if (! auth()->user()->can('update', $this->invoice)) {
            session()->flash('error', 'You do not have permission to send this invoice.');

            return;
        }

        // This would typically integrate with email service
        $this->invoice->markAsSent('email', $this->invoice->customer->email);
        $this->invoice->refresh();
        session()->flash('success', 'Invoice sent successfully.');
    }

    public function duplicateInvoice()
    {
        if (! auth()->user()->can('create', Invoice::class)) {
            session()->flash('error', 'You do not have permission to create invoices.');

            return;
        }

        try {
            $newInvoice = $this->invoice->replicate();
            $newInvoice->invoice_number = Invoice::generateInvoiceNumber($this->invoice->branch->code);
            $newInvoice->status = 'draft';
            $newInvoice->invoice_date = now()->toDateString();
            $newInvoice->due_date = now()->addDays(30)->toDateString();
            $newInvoice->paid_at = null;
            $newInvoice->payment_method = null;
            $newInvoice->payment_reference = null;
            $newInvoice->payment_notes = null;
            $newInvoice->sent_at = null;
            $newInvoice->sent_method = null;
            $newInvoice->sent_to = null;
            $newInvoice->created_by = auth()->id();
            $newInvoice->save();

            // Duplicate line items
            foreach ($this->invoice->lineItems as $lineItem) {
                $newLineItem = $lineItem->replicate();
                $newLineItem->invoice_id = $newInvoice->id;
                $newLineItem->save();
            }

            // Recalculate totals
            $newInvoice->recalculateTotals();

            return redirect()->route('invoices.edit', $newInvoice);
        } catch (\Exception $e) {
            Log::error('Failed to duplicate invoice', [
                'invoice_id' => $this->invoice->id,
                'error' => $e->getMessage(),
            ]);

            session()->flash('error', 'Failed to duplicate invoice. Please try again.');
        }
    }

    #[Layout('components.layouts.app.sidebar')]
    public function render()
    {
        return view('livewire.invoices.show');
    }
}