<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Sale;
use App\Models\Expense;
use Illuminate\Support\Facades\DB;
use Carbon\Carbon;

class ReportController extends Controller
{
    public function index()
    {
        // 1. Totales Generales
        $totalIncome = Sale::sum('total');
        $totalOutcome = Expense::where('status', 'Pagado')->sum('total_amount');
        $balance = $totalIncome - $totalOutcome;

        // 2. Gastos por Categoría (Para Pie Chart)
        $expensesByCategory = Expense::where('status', 'Pagado')
            ->select('expense_category', DB::raw('SUM(total_amount) as total'))
            ->groupBy('expense_category')
            ->get();

        // 3. Ingresos y Egresos por Mes (Últimos 6 meses)
        $months = [];
        $monthlyIncomeData = [];
        $monthlyOutcomeData = [];

        for ($i = 5; $i >= 0; $i--) {
            $date = now()->subMonths($i);
            $monthName = $date->translatedFormat('M Y'); // ej: may 2026
            
            $months[] = ucfirst($monthName);
            
            // Ingresos del mes
            $inc = Sale::whereYear('created_at', $date->year)
                       ->whereMonth('created_at', $date->month)
                       ->sum('total');
            $monthlyIncomeData[] = $inc;
            
            // Egresos del mes
            $out = Expense::where('status', 'Pagado')
                          ->whereYear('expense_date', $date->year)
                          ->whereMonth('expense_date', $date->month)
                          ->sum('total_amount');
            $monthlyOutcomeData[] = $out;
        }

        return view('reports.index', compact(
            'totalIncome', 
            'totalOutcome', 
            'balance', 
            'expensesByCategory', 
            'months', 
            'monthlyIncomeData', 
            'monthlyOutcomeData'
        ));
    }
}