import 'package:flutter/material.dart';
import 'package:material_symbols_icons/material_symbols_icons.dart';

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

  @override
  State<AccountStatementScreen> createState() => _AccountStatementScreen();
}

class _AccountStatementScreen extends State<AccountStatementScreen> {
  DateTime? fromDate;
  DateTime? toDate;
  final _amountRangeController = TextEditingController(text: "");
  final transactions = [
    {
      "desc": "Transfer From ICICI Bank subsidy",
      "amount": "+₹133.98",
      "type": "Cr",
      "time": "21-02-2024 13:09:30"
    },
    {
      "desc": "Mobile recharge",
      "amount": "-₹299.00",
      "type": "Dr",
      "time": "21-02-2024 13:09:30"
    },
    {
      "desc": "NEFT received from Jaya Saha",
      "amount": "+₹987.80",
      "type": "Cr",
      "time": "21-02-2024 13:09:30"
    },
    {
      "desc": "Transfer From ICICI Bank subsidy",
      "amount": "+₹100.00",
      "type": "Cr",
      "time": "21-02-2024 13:09:30"
    },
    {
      "desc": "Transfer From ICICI Bank subsidy",
      "amount": "-₹100.00",
      "type": "Dr",
      "time": "21-02-2024 13:09:30"
    },
    {
      "desc": "Transfer From ICICI Bank subsidy",
      "amount": "+₹100.00",
      "type": "Cr",
      "time": "21-02-2024 13:09:30"
    },
    {
      "desc": "Transfer From ICICI Bank subsidy",
      "amount": "+₹100.00",
      "type": "Cr",
      "time": "21-02-2024 13:09:30"
    },
  ];

  Future<void> _selectFromDate(BuildContext context) async {
    final DateTime now = DateTime.now();

    final DateTime? picked = await showDatePicker(
      context: context,
      initialDate: fromDate ?? now,
      firstDate: DateTime(2020), // or your app's start limit
      lastDate: now, // No future date
    );

    if (picked != null) {
      setState(() {
        fromDate = picked;
        toDate = null; // reset toDate when fromDate changes
      });
    }
  }

  Future<void> _selectToDate(BuildContext context) async {
    if (fromDate == null) {
      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
        content: Text('Please select From Date first'),
      ));
      return;
    }

    final DateTime now = DateTime.now();

    final DateTime lastAllowedDate = fromDate!.add(const Duration(days: 31));
    final DateTime maxToDate = lastAllowedDate.isBefore(now) ? lastAllowedDate : now;

    final DateTime? picked = await showDatePicker(
      context: context,
      initialDate: toDate ?? fromDate!,
      firstDate: fromDate!, // 🔒 can't be before fromDate
      lastDate: maxToDate, // 🔒 not more than 1 month or future
    );

    if (picked != null) {
      setState(() {
        toDate = picked;
      });
    }
  }

  String _formatDate(DateTime date) {
    return "${date.day.toString().padLeft(2, '0')}-"
        "${date.month.toString().padLeft(2, '0')}-"
        "${date.year}";
  }

  @override
  void dispose() {
    _amountRangeController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        leading: IconButton(
          icon: const Icon(Symbols.arrow_back_ios_new),
          onPressed: () {
            Navigator.pop(context);
          },
        ),
        title: const Text(
          'Account Statement',
          style: TextStyle(color: Colors.black, fontWeight: FontWeight.w500),
        ),
        centerTitle: false,
        actions: const [
          Padding(
            padding: EdgeInsets.only(right: 10.0),
            child: CircleAvatar(
              backgroundImage: AssetImage('assets/images/avatar.jpg'),
              // Replace with your image
              radius: 20,
            ),
          ),
        ],
      ),
      body: Padding(
        padding: const EdgeInsets.all(12.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const Text(
              'Filters',
              style: TextStyle(fontSize: 17),
            ),
            const SizedBox(
              height: 15,
            ),
            Row(
              children: [
                Expanded(child: GestureDetector(
                  onTap: () => _selectFromDate(context),
                  child: buildDateBox("From Date", fromDate),
                ),),
                const SizedBox(width: 10),
                Expanded(child: GestureDetector(
                  onTap: () => _selectToDate(context),
                  child: buildDateBox("To Date", toDate),
                ),),
              ],
            ),
            const SizedBox(height: 20),
            Row(
              children: [
                Expanded(
                  child: _buildFilterBox(""),
                ),
                const SizedBox(
                  width: 8,
                ),
                SizedBox(
                  width: 75,
                  child: ElevatedButton(
                      onPressed: () {},
                      style: ElevatedButton.styleFrom(
                        backgroundColor: Theme.of(context).primaryColor,
                      ),
                      child: const Text(
                        'Go',
                        style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600),
                      )),
                )
              ],
            ),
            const SizedBox(height: 35),
            Expanded(
              child: ListView.builder(
                itemCount: transactions.length,
                itemBuilder: (context, index) {
                  final txn = transactions[index];
                  return _buildTransactionTile(txn);
                },
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget buildDateBox(String label, DateTime? date) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 16),
      decoration: BoxDecoration(
        border: Border.all(color: Colors.grey),
        borderRadius: BorderRadius.circular(6),
      ),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(
            date != null ? _formatDate(date) : label,
            style: TextStyle(fontSize: 16,
            color: date != null ? Colors.black: Colors.grey),
          ),
          const Icon(Icons.arrow_drop_down),
        ],
      ),
    );
  }

  Widget _buildFilterBox(String text) {
    return TextFormField(
      controller: _amountRangeController,
      decoration: const InputDecoration(
        labelText: 'Amount Range',
        // prefixIcon: Icon(Icons.person),
        border: OutlineInputBorder(),
        isDense: true,
        filled: true,
        fillColor: Colors.white,
        enabledBorder: OutlineInputBorder(
          borderSide: BorderSide(color: Colors.black),
        ),
        focusedBorder: OutlineInputBorder(
          borderSide: BorderSide(color: Colors.black, width: 2),
        ),
      ),
      keyboardType: TextInputType.number,
      textInputAction: TextInputAction.next,
      validator: (value) {
        if (value == null || value.isEmpty) {
          return 'Please enter amount range';
        }
        return null;
      },
    );
  }

  Widget _buildTransactionTile(Map<String, String> txn) {
    final isCredit = txn['type'] == "Cr";
    final amountColor = isCredit ? Colors.green : Colors.red;
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(txn['time']!, style: const TextStyle(color: Colors.grey)),
        const SizedBox(height: 4),
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Expanded(
                child:
                    Text(txn['desc']!, style: const TextStyle(fontSize: 16))),
            Text(
              "${txn['amount']} ${txn['type']}",
              style: TextStyle(color: amountColor, fontWeight: FontWeight.bold),
            ),
          ],
        ),
        const SizedBox(height: 25),
      ],
    );
  }
}