import 'package:flutter/material.dart';

class HistoryScreen extends StatefulWidget {
  const HistoryScreen({super.key});

  @override
  State<HistoryScreen> createState() => _HistoryScreenState();
}

class _HistoryScreenState extends State<HistoryScreen> {
  final List<Map<String, dynamic>> _transactions = [
    {
      'title': 'Electricity Bill',
      'amount': -120.00,
      'date': 'Today',
      'icon': Icons.electric_bolt,
      'status': 'Completed',
    },
    {
      'title': 'Internet Bill',
      'amount': -75.00,
      'date': 'Yesterday',
      'icon': Icons.wifi,
      'status': 'Completed',
    },
    {
      'title': 'Mobile Bill',
      'amount': -50.00,
      'date': '2 days ago',
      'icon': Icons.phone_android,
      'status': 'Completed',
    },
    {
      'title': 'Water Bill',
      'amount': -45.00,
      'date': '3 days ago',
      'icon': Icons.water_drop,
      'status': 'Completed',
    },
    {
      'title': 'Gas Bill',
      'amount': -65.00,
      'date': '4 days ago',
      'icon': Icons.local_fire_department,
      'status': 'Completed',
    },
  ];

  String _selectedFilter = 'All';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Transaction History'),
        actions: [
          IconButton(
            icon: const Icon(Icons.filter_list),
            onPressed: _showFilterDialog,
          ),
        ],
      ),
      body: Column(
        children: [
          _buildFilterChips(),
          Expanded(
            child: ListView.builder(
              padding: const EdgeInsets.all(16),
              itemCount: _transactions.length,
              itemBuilder: (context, index) {
                final transaction = _transactions[index];
                return _buildTransactionCard(transaction, index);
              },
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildFilterChips() {
    return SingleChildScrollView(
      scrollDirection: Axis.horizontal,
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      child: Row(
        children: [
          _buildFilterChip('All'),
          _buildFilterChip('Bills'),
          _buildFilterChip('Payments'),
          _buildFilterChip('Transfers'),
        ],
      ),
    );
  }

  Widget _buildFilterChip(String label) {
    final isSelected = _selectedFilter == label;
    return Padding(
      padding: const EdgeInsets.only(right: 8),
      child: FilterChip(
        selected: isSelected,
        label: Text(label),
        onSelected: (selected) {
          setState(() {
            _selectedFilter = label;
          });
        },
        backgroundColor: Theme.of(context).colorScheme.surface,
        selectedColor: Theme.of(context).colorScheme.primary.withOpacity(0.2),
        checkmarkColor: Theme.of(context).colorScheme.primary,
        labelStyle: TextStyle(
          color: isSelected
              ? Theme.of(context).colorScheme.primary
              : Theme.of(context).colorScheme.onSurface,
        ),
      ),
    );
  }

  Widget _buildTransactionCard(Map<String, dynamic> transaction, int index) {
    return Card(
      margin: const EdgeInsets.only(bottom: 16),
      child: InkWell(
        onTap: () => _showTransactionDetails(transaction),
        borderRadius: BorderRadius.circular(16),
        child: Padding(
          padding: const EdgeInsets.all(16),
          child: Row(
            children: [
              Container(
                padding: const EdgeInsets.all(12),
                decoration: BoxDecoration(
                  color: Theme.of(context).colorScheme.primary.withOpacity(0.1),
                  borderRadius: BorderRadius.circular(12),
                ),
                child: Icon(
                  transaction['icon'] as IconData,
                  color: Theme.of(context).colorScheme.primary,
                ),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      transaction['title'] as String,
                      style: const TextStyle(
                        fontWeight: FontWeight.bold,
                        fontSize: 16,
                      ),
                    ),
                    const SizedBox(height: 4),
                    Text(
                      transaction['date'] as String,
                      style: TextStyle(
                        color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                        fontSize: 14,
                      ),
                    ),
                  ],
                ),
              ),
              Column(
                crossAxisAlignment: CrossAxisAlignment.end,
                children: [
                  Text(
                    '\$${transaction['amount'].abs().toStringAsFixed(2)}',
                    style: TextStyle(
                      color: transaction['amount'] < 0
                          ? Theme.of(context).colorScheme.error
                          : Colors.green,
                      fontWeight: FontWeight.bold,
                      fontSize: 16,
                    ),
                  ),
                  const SizedBox(height: 4),
                  Container(
                    padding: const EdgeInsets.symmetric(
                      horizontal: 8,
                      vertical: 4,
                    ),
                    decoration: BoxDecoration(
                      color: Colors.green.withOpacity(0.1),
                      borderRadius: BorderRadius.circular(8),
                    ),
                    child: Text(
                      transaction['status'] as String,
                      style: const TextStyle(
                        color: Colors.green,
                        fontSize: 12,
                        fontWeight: FontWeight.w500,
                      ),
                    ),
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }

  void _showFilterDialog() {
    showModalBottomSheet(
      context: context,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (context) {
        return Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              const Text(
                'Filter Transactions',
                style: TextStyle(
                  fontSize: 20,
                  fontWeight: FontWeight.bold,
                ),
              ),
              const SizedBox(height: 16),
              _buildFilterOption('All Transactions'),
              _buildFilterOption('Bills Only'),
              _buildFilterOption('Payments Only'),
              _buildFilterOption('Transfers Only'),
              const SizedBox(height: 16),
            ],
          ),
        );
      },
    );
  }

  Widget _buildFilterOption(String option) {
    return ListTile(
      title: Text(option),
      trailing: _selectedFilter == option
          ? Icon(
              Icons.check_circle,
              color: Theme.of(context).colorScheme.primary,
            )
          : null,
      onTap: () {
        setState(() {
          _selectedFilter = option;
        });
        Navigator.pop(context);
      },
    );
  }

  void _showTransactionDetails(Map<String, dynamic> transaction) {
    showModalBottomSheet(
      context: context,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (context) {
        return Padding(
          padding: const EdgeInsets.all(24),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Container(
                    padding: const EdgeInsets.all(12),
                    decoration: BoxDecoration(
                      color: Theme.of(context).colorScheme.primary.withOpacity(0.1),
                      borderRadius: BorderRadius.circular(12),
                    ),
                    child: Icon(
                      transaction['icon'] as IconData,
                      color: Theme.of(context).colorScheme.primary,
                      size: 32,
                    ),
                  ),
                  const SizedBox(width: 16),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          transaction['title'] as String,
                          style: const TextStyle(
                            fontSize: 20,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                        const SizedBox(height: 4),
                        Text(
                          transaction['date'] as String,
                          style: TextStyle(
                            color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                          ),
                        ),
                      ],
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 24),
              _buildDetailRow('Amount', '\$${transaction['amount'].abs().toStringAsFixed(2)}'),
              _buildDetailRow('Status', transaction['status'] as String),
              _buildDetailRow('Transaction ID', '#${DateTime.now().millisecondsSinceEpoch}'),
              const SizedBox(height: 24),
              SizedBox(
                width: double.infinity,
                child: ElevatedButton(
                  onPressed: () {
                    Navigator.pop(context);
                  },
                  child: const Text('Close'),
                ),
              ),
            ],
          ),
        );
      },
    );
  }

  Widget _buildDetailRow(String label, String value) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 16),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(
            label,
            style: TextStyle(
              color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
            ),
          ),
          Text(
            value,
            style: const TextStyle(
              fontWeight: FontWeight.w500,
            ),
          ),
        ],
      ),
    );
  }
}