<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Expense;
use App\Models\Supplier;

class ExpenseController extends Controller
{
    private function checkAdmin()
    {
        if (auth()->check() && auth()->user()->role !== 'admin') {
            abort(403, 'Solo los administradores pueden realizar esta acción.');
        }
    }

    public function index(Request $request)
    {
        $query = $request->input('search');
        $category = $request->input('category');

        $expenses = Expense::with('supplier')
            ->when($query, function ($q) use ($query) {
                return $q->where('description', 'like', "%{$query}%")
                         ->orWhereHas('supplier', function($sq) use ($query) {
                             $sq->where('name', 'like', "%{$query}%");
                         });
            })
            ->when($category, function ($q) use ($category) {
                return $q->where('expense_category', $category);
            })
            ->orderBy('expense_date', 'desc')
            ->orderBy('id', 'desc')
            ->paginate(10)
            ->withQueryString();

        return view('expenses.index', compact('expenses'));
    }

    public function create()
    {
        $this->checkAdmin();
        $suppliers = Supplier::orderBy('name')->get();
        return view('expenses.create', compact('suppliers'));
    }

    public function store(Request $request)
    {
        $this->checkAdmin();
        $validated = $request->validate([
            'supplier_id' => 'nullable|exists:suppliers,id',
            'description' => 'required|string|max:255',
            'expense_category' => 'required|in:Mercadería,Servicios,Impuestos,Logística,Otros',
            'type' => 'required|in:Compra,Pedido,Factura',
            'status' => 'required|in:Pendiente,Pagado,Cancelado',
            'total_amount' => 'required|numeric|min:0',
            'document_number' => 'nullable|string|max:255',
            'expense_date' => 'nullable|date',
        ]);

        if(empty($validated['expense_date'])) {
            $validated['expense_date'] = now()->toDateString();
        }

        Expense::create($validated);

        return redirect()->route('expenses.index')->with('success', 'Gasto registrado correctamente.');
    }

    public function show(Expense $expense)
    {
        return view('expenses.show', compact('expense'));
    }

    public function edit(Expense $expense)
    {
        $this->checkAdmin();
        $suppliers = Supplier::orderBy('name')->get();
        return view('expenses.edit', compact('expense', 'suppliers'));
    }

    public function update(Request $request, Expense $expense)
    {
        $this->checkAdmin();
        $validated = $request->validate([
            'supplier_id' => 'nullable|exists:suppliers,id',
            'description' => 'required|string|max:255',
            'expense_category' => 'required|in:Mercadería,Servicios,Impuestos,Logística,Otros',
            'type' => 'required|in:Compra,Pedido,Factura',
            'status' => 'required|in:Pendiente,Pagado,Cancelado',
            'total_amount' => 'required|numeric|min:0',
            'document_number' => 'nullable|string|max:255',
            'expense_date' => 'nullable|date',
        ]);

        $expense->update($validated);

        return redirect()->route('expenses.index')->with('success', 'Gasto actualizado correctamente.');
    }

    public function destroy(Expense $expense)
    {
        $this->checkAdmin();
        $expense->delete();
        return redirect()->route('expenses.index')->with('success', 'Gasto eliminado correctamente.');
    }
}