<?php

namespace App\Http\Controllers\App;

use App\Http\Controllers\Controller;
use App\Models\Client;
use App\Models\Sale;
use Illuminate\Http\Request;
use Notsoweb\ApiResponse\Enums\ApiResponse;

class FacturaDataController extends Controller
{
    /**
     * Muestra los datos de la venta para el formulario de facturación.
     */
    public function show(string $invoiceNumber)
    {
        $sale = Sale::where('invoice_number', $invoiceNumber)
            ->with([
                'client',
                'details.inventory.category',
                'details.serials',
                'user:id,name,email'
            ])
            ->first();

        if (!$sale) {
            return  ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Venta no encontrada'
            ]);
        }

        // Si ya tiene datos de facturación
        if ($sale->client_id) {
            return  ApiResponse::NO_CONTENT->response([
                'message' => 'Esta venta ya tiene datos de facturación registrados',
                'client' => $sale->client,
                'sale' => $this->formatSaleData($sale)
            ]);
        }

        return  ApiResponse::OK->response([
            'sale' => $this->formatSaleData($sale)
        ]);
    }

    /**
     * Guarda los datos fiscales del cliente para la venta.
     */
    public function store(Request $request, string $invoiceNumber)
    {
        $sale = Sale::where('invoice_number', $invoiceNumber)
            ->with('details.serials')
            ->first();

        if (!$sale) {
            return  ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Venta no encontrada'
            ]);
        }

        if ($sale->client_id) {
            return  ApiResponse::NO_CONTENT->response([
                'message' => 'Esta venta ya tiene datos de facturación registrados'
            ]);
        }

        // Verificar que la venta esté completada
        if ($sale->status !== 'completed') {
            return  ApiResponse::BAD_REQUEST->response([
                'message' => 'Solo se pueden facturar ventas completadas'
            ]);
        }

        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'email' => 'required|email|max:255',
            'phone' => 'nullable|string|max:20',
            'address' => 'nullable|string|max:500',
            'rfc' => 'required|string|size:13|regex:/^[A-ZÑ&]{3,4}\d{6}[A-Z0-9]{3}$/i',
            'razon_social' => 'required|string|max:255',
            'regimen_fiscal' => 'required|string|max:100',
            'cp_fiscal' => 'required|string|size:5|regex:/^\d{5}$/',
            'uso_cfdi' => 'required|string|max:10',
        ], [
            'rfc.regex' => 'El RFC no tiene un formato válido',
            'rfc.size' => 'El RFC debe tener 13 caracteres',
            'cp_fiscal.regex' => 'El código postal debe ser de 5 dígitos',
            'cp_fiscal.size' => 'El código postal debe ser de 5 dígitos',
            'name.required' => 'El nombre es obligatorio',
            'email.required' => 'El correo electrónico es obligatorio',
            'email.email' => 'El correo electrónico debe ser válido',
            'razon_social.required' => 'La razón social es obligatoria',
            'regimen_fiscal.required' => 'El régimen fiscal es obligatorio',
            'uso_cfdi.required' => 'El uso de CFDI es obligatorio',
        ]);

        // Buscar si ya existe un cliente con ese RFC
        $client = Client::where('rfc', strtoupper($validated['rfc']))->first();

        if ($client) {
            // Actualizar datos del cliente existente
            $client->update([
                'name' => $validated['name'],
                'email' => $validated['email'],
                'phone' => $validated['phone'] ?? $client->phone,
                'address' => $validated['address'] ?? $client->address,
                'razon_social' => $validated['razon_social'],
                'regimen_fiscal' => $validated['regimen_fiscal'],
                'cp_fiscal' => $validated['cp_fiscal'],
                'uso_cfdi' => $validated['uso_cfdi'],
            ]);
        } else {
            // Crear nuevo cliente
            $client = Client::create([
                'name' => $validated['name'],
                'email' => $validated['email'],
                'phone' => $validated['phone'],
                'address' => $validated['address'],
                'rfc' => strtoupper($validated['rfc']),
                'razon_social' => $validated['razon_social'],
                'regimen_fiscal' => $validated['regimen_fiscal'],
                'cp_fiscal' => $validated['cp_fiscal'],
                'uso_cfdi' => $validated['uso_cfdi'],
            ]);
        }

        // Asociar cliente a la venta
        $sale->update(['client_id' => $client->id]);

        // Recargar relaciones
        $sale->load([
            'client',
            'details.inventory.category',
            'details.serials',
            'user:id,name,email'
        ]);

        return ApiResponse::OK->response([
            'message' => 'Datos de facturación guardados correctamente',
            'client' => $client,
            'sale' => $this->formatSaleData($sale)
        ]);
    }

    /**
     * Formatear datos de la venta incluyendo números de serie
     */
    private function formatSaleData(Sale $sale): array
    {
        return [
            'id' => $sale->id,
            'invoice_number' => $sale->invoice_number,
            'total' => $sale->total,
            'subtotal' => $sale->subtotal,
            'tax' => $sale->tax,
            'payment_method' => $sale->payment_method,
            'status' => $sale->status,
            'created_at' => $sale->created_at,
            'user' => $sale->user ? [
                'id' => $sale->user->id,
                'name' => $sale->user->name,
                'email' => $sale->user->email,
            ] : null,
            'items' => $sale->details->map(function ($detail) {
                return [
                    'id' => $detail->id,
                    'product_name' => $detail->product_name,
                    'quantity' => $detail->quantity,
                    'unit_price' => $detail->unit_price,
                    'subtotal' => $detail->subtotal,
                    'category' => $detail->inventory->category->name ?? null,
                    'sku' => $detail->inventory->sku ?? null,
                    // Números de serie vendidos
                    'serial_numbers' => $detail->serials->map(function ($serial) {
                        return [
                            'serial_number' => $serial->serial_number,
                            'status' => $serial->status,
                        ];
                    })->toArray(),
                ];
            })->toArray(),
        ];
    }
}