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145
lib/screens/estadisticas_screen.dart
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145
lib/screens/estadisticas_screen.dart
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import 'package:intl/intl.dart';
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import 'package:fl_chart/fl_chart.dart';
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import '../providers/factura_provider.dart';
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import '../providers/configuracion_provider.dart';
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class EstadisticasScreen extends StatefulWidget {
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const EstadisticasScreen({super.key});
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@override
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State<EstadisticasScreen> createState() => _EstadisticasScreenState();
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}
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class _EstadisticasScreenState extends State<EstadisticasScreen> {
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late int _year;
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@override
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void initState() {
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super.initState();
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_year = DateTime.now().year;
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}
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@override
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Widget build(BuildContext context) {
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final facturaProv = context.watch<FacturaProvider>();
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final configProv = context.watch<ConfiguracionProvider>();
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final moneda = configProv.config?.moneda ?? 'USD';
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final symbol = moneda == 'USD' ? '\$' : moneda == 'EUR' ? '€' : moneda == 'MXN' ? 'MX\$' : '\$';
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return Scaffold(
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appBar: AppBar(title: const Text('Estadísticas')),
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body: FutureBuilder(
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future: Future.wait([
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facturaProv.gastoMensual(_year),
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facturaProv.gastosPorServicio(_year, DateTime.now().month),
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facturaProv.totalGastadoMes(_year, DateTime.now().month),
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]),
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builder: (context, AsyncSnapshot<List<dynamic>> snapshot) {
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if (!snapshot.hasData) return const Center(child: CircularProgressIndicator());
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final gastoMensual = snapshot.data![0] as List<Map<String, dynamic>>;
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final gastoPorServicio = snapshot.data![1] as Map<String, double>;
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final totalMes = snapshot.data![2] as double;
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return ListView(
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padding: const EdgeInsets.all(16),
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children: [
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Text('Resumen $_year', style: Theme.of(context).textTheme.titleLarge),
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const SizedBox(height: 8),
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Card(
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text('Gasto mensual actual', style: Theme.of(context).textTheme.titleSmall),
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Text('$symbol${NumberFormat('#,##0.00').format(totalMes)}',
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style: Theme.of(context).textTheme.headlineMedium),
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],
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),
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),
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),
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const SizedBox(height: 20),
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Text('Gasto mensual ($_year)', style: Theme.of(context).textTheme.titleMedium),
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const SizedBox(height: 8),
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SizedBox(
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height: 200,
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child: BarChart(
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BarChartData(
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alignment: BarChartAlignment.spaceAround,
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maxY: (gastoMensual.isEmpty ? 1000 : gastoMensual.map((e) => (e['total'] as num).toDouble()).reduce((a, b) => a > b ? a : b)) * 1.2,
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barGroups: List.generate(12, (i) {
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final mes = (i + 1).toString().padLeft(2, '0');
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final data = gastoMensual.where((e) => e['mes'] == mes).firstOrNull;
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return BarChartGroupData(
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x: i,
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barRods: [
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BarChartRodData(
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toY: data != null ? (data['total'] as num).toDouble() : 0,
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color: Theme.of(context).colorScheme.primary,
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width: 16,
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borderRadius: const BorderRadius.vertical(top: Radius.circular(4)),
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),
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],
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);
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}),
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titlesData: FlTitlesData(
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leftTitles: AxisTitles(sideTitles: SideTitles(showTitles: true, reservedSize: 40, getTitlesWidget: (v, _) => Text('$symbol${v.toInt()}', style: const TextStyle(fontSize: 10)))),
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bottomTitles: AxisTitles(sideTitles: SideTitles(showTitles: true, getTitlesWidget: (v, _) {
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const meses = ['E', 'F', 'M', 'A', 'M', 'J', 'J', 'A', 'S', 'O', 'N', 'D'];
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return Text(meses[v.toInt()], style: const TextStyle(fontSize: 10));
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})),
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rightTitles: AxisTitles(sideTitles: SideTitles(showTitles: false)),
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topTitles: AxisTitles(sideTitles: SideTitles(showTitles: false)),
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),
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gridData: FlGridData(show: true, drawVerticalLine: false, horizontalInterval: (gastoMensual.isEmpty ? 1000 : gastoMensual.map((e) => (e['total'] as num).toDouble()).reduce((a, b) => a > b ? a : b)) / 4),
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borderData: FlBorderData(show: false),
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),
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),
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),
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const SizedBox(height: 20),
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Text('Distribución por servicio', style: Theme.of(context).textTheme.titleMedium),
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const SizedBox(height: 8),
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if (gastoPorServicio.isEmpty)
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Card(child: Padding(padding: const EdgeInsets.all(16), child: Text('Sin datos este mes')))
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else
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Card(
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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children: gastoPorServicio.entries.map((e) {
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final total = gastoPorServicio.values.fold(0.0, (a, b) => a + b);
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final pct = total > 0 ? e.value / total * 100 : 0.0;
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return Padding(
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padding: const EdgeInsets.only(bottom: 8),
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child: Row(
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children: [
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SizedBox(width: 100, child: Text(e.key, style: const TextStyle(fontSize: 13))),
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Expanded(
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child: ClipRRect(
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borderRadius: BorderRadius.circular(4),
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child: LinearProgressIndicator(
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value: pct / 100,
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backgroundColor: Colors.grey[200],
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minHeight: 12,
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),
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),
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),
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const SizedBox(width: 8),
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SizedBox(width: 70, child: Text('$symbol${NumberFormat('#,##0.00').format(e.value)}', style: const TextStyle(fontSize: 12), textAlign: TextAlign.right)),
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],
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),
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);
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}).toList(),
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),
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),
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),
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],
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);
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},
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),
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);
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}
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}
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