import 'package:flutter/material.dart';
import '../../../../core/theme/app_colors.dart';
import '../../data/models/dashboard_metrics_model.dart';

class DashboardMetricsCards extends StatelessWidget {
  final DashboardMetricsModel metrics;

  const DashboardMetricsCards({super.key, required this.metrics});

  String _formatNumber(int n) {
    return n.toString().replaceAllMapped(
      RegExp(r'(\d{1,3})(?=(\d{3})+(?!\d))'),
      (Match m) => '${m[1]},',
    );
  }

  @override
  Widget build(BuildContext context) {
    final cards = [
      // 1. Total de Nuevos Pacientes
      _buildMetricCard(
        title: 'Total Nuevos Pacientes',
        value: _formatNumber(metrics.nuevosPacientes),
        subtitle: 'Registrados en la plataforma',
        icon: Icons.person_add_alt_1_rounded,
        iconColor: AppColors.primary,
        bgColor: AppColors.primaryContainer,
      ),

      // 2. Total de Consultados Hoy
      _buildMetricCard(
        title: 'Total Consultados Hoy',
        value: _formatNumber(metrics.consultadosHoy),
        subtitle: 'Atenciones médicas realizadas',
        icon: Icons.assignment_turned_in_rounded,
        iconColor: AppColors.teal,
        bgColor: AppColors.teal.withValues(alpha: 0.12),
      ),

      // 3. Total de Citas para Hoy
      _buildMetricCard(
        title: 'Total Citas para Hoy',
        value: _formatNumber(metrics.citasHoy),
        subtitle: 'Pacientes agendados',
        icon: Icons.event_available_rounded,
        iconColor: AppColors.warning,
        bgColor: AppColors.warning.withValues(alpha: 0.12),
      ),

      // 4. Total de Pacientes por Sexo
      _buildGenderCard(),
    ];

    return LayoutBuilder(
      builder: (context, constraints) {
        const spacing = 16.0;

        // Distribución equitativa en 4 columnas (pantallas amplias)
        if (constraints.maxWidth >= 1000) {
          return IntrinsicHeight(
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                Expanded(child: cards[0]),
                const SizedBox(width: spacing),
                Expanded(child: cards[1]),
                const SizedBox(width: spacing),
                Expanded(child: cards[2]),
                const SizedBox(width: spacing),
                Expanded(child: cards[3]),
              ],
            ),
          );
        }

        // Distribución equitativa en 2 columnas (pantallas medianas)
        if (constraints.maxWidth >= 550) {
          return Column(
            children: [
              IntrinsicHeight(
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    Expanded(child: cards[0]),
                    const SizedBox(width: spacing),
                    Expanded(child: cards[1]),
                  ],
                ),
              ),
              const SizedBox(height: spacing),
              IntrinsicHeight(
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    Expanded(child: cards[2]),
                    const SizedBox(width: spacing),
                    Expanded(child: cards[3]),
                  ],
                ),
              ),
            ],
          );
        }

        // 1 columna ocupando 100% del ancho (pantallas móviles / compactas)
        return Column(
          children: [
            cards[0],
            const SizedBox(height: spacing),
            cards[1],
            const SizedBox(height: spacing),
            cards[2],
            const SizedBox(height: spacing),
            cards[3],
          ],
        );
      },
    );
  }

  Widget _buildMetricCard({
    required String title,
    String? value,
    Widget? valueWidget,
    required String subtitle,
    required IconData icon,
    required Color iconColor,
    required Color bgColor,
  }) {
    return Container(
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(14),
        border: Border.all(color: AppColors.border),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withValues(alpha: 0.02),
            blurRadius: 10,
            offset: const Offset(0, 4),
          ),
        ],
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Container(
            padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(
              color: bgColor,
              borderRadius: BorderRadius.circular(12),
            ),
            child: Icon(icon, color: iconColor, size: 24),
          ),
          const SizedBox(width: 14),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisSize: MainAxisSize.min,
              children: [
                Text(
                  title,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: const TextStyle(
                    fontSize: 12,
                    fontWeight: FontWeight.w600,
                    color: AppColors.textSecondary,
                  ),
                ),
                const SizedBox(height: 4),
                valueWidget ??
                    Text(
                      value ?? '',
                      style: const TextStyle(
                        fontSize: 22,
                        fontWeight: FontWeight.w700,
                        color: AppColors.textPrimary,
                      ),
                    ),
                const SizedBox(height: 2),
                Text(
                  subtitle,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: const TextStyle(
                    fontSize: 11,
                    color: AppColors.textMuted,
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }


  Widget _buildGenderCard() {
    final total = metrics.pacientesMasculinos + metrics.pacientesFemeninos;
    final mascPct = total > 0 ? ((metrics.pacientesMasculinos / total) * 100).toInt() : 81;
    final femPct = total > 0 ? ((metrics.pacientesFemeninos / total) * 100).toInt() : 19;

    return _buildMetricCard(
      title: 'Pacientes por Sexo',
      valueWidget: FittedBox(
        fit: BoxFit.scaleDown,
        alignment: Alignment.centerLeft,
        child: Row(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.baseline,
          textBaseline: TextBaseline.alphabetic,
          children: [
            Text(
              _formatNumber(metrics.pacientesMasculinos),
              style: const TextStyle(
                fontSize: 20,
                fontWeight: FontWeight.w700,
                color: AppColors.primary,
              ),
            ),
            const Text(
              ' M',
              style: TextStyle(
                fontSize: 11,
                fontWeight: FontWeight.w700,
                color: AppColors.primary,
              ),
            ),
            const SizedBox(width: 8),
            const Text(
              '/',
              style: TextStyle(
                fontSize: 16,
                fontWeight: FontWeight.w400,
                color: AppColors.border,
              ),
            ),
            const SizedBox(width: 8),
            Text(
              _formatNumber(metrics.pacientesFemeninos),
              style: const TextStyle(
                fontSize: 20,
                fontWeight: FontWeight.w700,
                color: Color(0xFFEC4899),
              ),
            ),
            const Text(
              ' F',
              style: TextStyle(
                fontSize: 11,
                fontWeight: FontWeight.w700,
                color: Color(0xFFEC4899),
              ),
            ),
          ],
        ),
      ),
      subtitle: '$mascPct% Masc · $femPct% Fem',
      icon: Icons.people_alt_rounded,
      iconColor: AppColors.secondary,
      bgColor: AppColors.secondary.withValues(alpha: 0.12),
    );
  }
}