<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Client;
use App\Models\Payment;
use App\Models\LockerRegistration;
use App\Models\Company;
use App\Services\SimplePdfGenerator;

class InvoiceController extends Controller
{
    // Show invoice as HTML
    public function show($clientId, $registrationId)
    {
        $client = Client::findOrFail($clientId);
        $registration = LockerRegistration::with('items', 'locker', 'membershipPlan', 'payments')
            ->findOrFail($registrationId);
        
        // Get payment if exists, otherwise create a dummy payment object for display
        $payment = $registration->payments->first();
        if (!$payment) {
            // Create a dummy payment object for display purposes
            $payment = new \stdClass();
            $payment->id = 'INV-' . $registration->id;
            $payment->payment_date = $registration->registration_date;
            $payment->total_amount = $registration->items->sum('amount') + ($registration->tax_amount ?? 0) + ($registration->stamping_fee ?? 0) + ($registration->key_deposit ?? 0) + ($registration->insurance_charges ?? 0) - ($registration->discount_amount ?? 0);
            $payment->status = 'generated';
        }
        
        return view('invoices.show', compact('client', 'payment', 'registration'));
    }

    // Download invoice as PDF using native PHP
    public function download($clientId, $registrationId)
    {
        $client = Client::findOrFail($clientId);
        $registration = LockerRegistration::with('items', 'locker', 'membershipPlan', 'payments')
            ->findOrFail($registrationId);
        
        // Get payment if exists, otherwise create a dummy payment object for display
        $payment = $registration->payments->first();
        if (!$payment) {
            // Create a dummy payment object for display purposes
            $payment = new \stdClass();
            $payment->id = 'INV-' . $registration->id;
            $payment->payment_date = $registration->registration_date;
            $payment->total_amount = $registration->items->sum('amount') + ($registration->tax_amount ?? 0) + ($registration->stamping_fee ?? 0) + ($registration->key_deposit ?? 0) + ($registration->insurance_charges ?? 0) - ($registration->discount_amount ?? 0);
            $payment->status = 'generated';
        }

        // Get company information
        $company = Company::active()->first();
        if (!$company) {
            // Use static company information if no company record exists
            $companyData = [
                'name' => 'May Safe Box',
                'address' => '123 Business Street',
                'city' => 'Chennai',
                'state' => 'Tamil Nadu',
                'pincode' => '600001',
                'gst_number' => 'GSTIN1234567890',
                'phone_number' => '+91 98765 43210'
            ];
        } else {
            $companyData = [
                'name' => $company->name,
                'address' => $company->address,
                'city' => $company->city,
                'state' => $company->state,
                'pincode' => $company->pincode,
                'gst_number' => $company->gst_number,
                'phone_number' => '+91 98765 43210' // Static phone if not in company model
            ];
        }

        // Prepare data for PDF
        $data = [
            'company' => $companyData,
            'invoice_number' => $payment->id,
            'date' => $payment->payment_date ? \Carbon\Carbon::parse($payment->payment_date)->format('d-m-Y') : now()->format('d-m-Y'),
            'client_name' => $client->name,
            'client_phone' => $client->phone,
            'client_address' => $client->address . ', ' . $client->city . ', ' . $client->state . ', ' . $client->country,
            'registration_id' => $registration->id,
            'membership_plan' => $registration->membershipPlan->name ?? 'N/A',
            'contract_period' => $registration->contract_start_date . ' to ' . $registration->contract_end_date,
            'items' => $registration->items->map(function($item) {
                return [
                    'locker_number' => $item->locker_number,
                    'size' => $item->size,
                    'type' => $item->type,
                    'amount' => $item->amount
                ];
            })->toArray(),
            'total_amount' => $payment->total_amount
        ];

        // Generate PDF
        $pdfGenerator = new SimplePdfGenerator();
        $pdfContent = $pdfGenerator->generatePdf($data);

        // Return PDF download response
        return response($pdfContent)
            ->header('Content-Type', 'application/pdf')
            ->header('Content-Disposition', 'attachment; filename="invoice_' . $payment->id . '.pdf"')
            ->header('Content-Length', strlen($pdfContent));
    }
}