import 'package:flutter/material.dart';
import '../../../../core/theme/app_theme.dart';
import '../models/trade_acceptance_dto.dart';
import '../models/trade_model.dart';


class TradeAcceptanceDialog extends StatefulWidget {
  final TradeModel trade;
  final ThemePreset theme;
  final String userId;

  const TradeAcceptanceDialog({
    super.key,
    required this.trade,
    required this.theme,
    required this.userId,
  });

  @override
  State<TradeAcceptanceDialog> createState() => _TradeAcceptanceDialogState();
}

class _TradeAcceptanceDialogState extends State<TradeAcceptanceDialog> {
  late TextEditingController _entryPriceCtrl;
  late TextEditingController _positionSizeCtrl;
  late TextEditingController _leverageCtrl;
  late TextEditingController _entryFeeCtrl;
  late TextEditingController _exitFeeCtrl;
  late TextEditingController _quantityCtrl;
  late TextEditingController _stopLossCtrl;
  late TextEditingController _takeProfitCtrl;
  late TextEditingController _notesCtrl;
  bool _isRecurring = false;

  @override
  void initState() {
    super.initState();
    _entryPriceCtrl = TextEditingController(text: widget.trade.entryPrice.toStringAsFixed(2));
    _positionSizeCtrl = TextEditingController(text: '1000');
    final lev = widget.trade.maxLeverage > 0 ? widget.trade.maxLeverage : 1.0;
    _leverageCtrl = TextEditingController(text: lev == lev.roundToDouble() ? lev.toInt().toString() : lev.toStringAsFixed(2));
    _stopLossCtrl = TextEditingController(text: widget.trade.stopLoss.toStringAsFixed(2));
    _takeProfitCtrl = TextEditingController(text: widget.trade.takeProfit.toStringAsFixed(2));
    _notesCtrl = TextEditingController();
    _entryFeeCtrl = TextEditingController(text: '0.00');
    _exitFeeCtrl = TextEditingController(text: '0.00');
    double price = widget.trade.entryPrice;
    _quantityCtrl = TextEditingController(text: (1000 / (price > 0 ? price : 1)).toStringAsFixed(4));
  }

  @override
  void dispose() {
    _entryPriceCtrl.dispose();
    _positionSizeCtrl.dispose();
    _leverageCtrl.dispose();
    _stopLossCtrl.dispose();
    _takeProfitCtrl.dispose();
    _notesCtrl.dispose();
    _entryFeeCtrl.dispose();
    _exitFeeCtrl.dispose();
    _quantityCtrl.dispose();
    super.dispose();
  }

  double? _parseNum(String text) {
    final cleaned = text.replaceAll(',', '.').trim();
    return double.tryParse(cleaned);
  }

  void _recalcQuantity() {
    double posSize = _parseNum(_positionSizeCtrl.text) ?? 0;
    double price = _parseNum(_entryPriceCtrl.text) ?? 0;
    if (price > 0) {
      _quantityCtrl.text = (posSize / price).toStringAsFixed(4);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Dialog(
      backgroundColor: Colors.transparent,
      insetPadding: const EdgeInsets.all(16),
      child: Container(
        width: 450,
        padding: const EdgeInsets.all(24),
        decoration: BoxDecoration(
          color: widget.theme.cardSurface,
          borderRadius: BorderRadius.circular(20),
          border: Border.all(color: widget.theme.glassBorder, width: 1),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withValues(alpha: 0.5),
              blurRadius: 20,
              offset: const Offset(0, 10),
            )
          ],
        ),
        child: SingleChildScrollView(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Icon(Icons.add_shopping_cart, color: widget.theme.primaryColor, size: 28),
                  const SizedBox(width: 12),
                  Expanded(
                    child: Text(
                      'Trade Akzeptieren - ${widget.trade.symbol}',
                      style: TextStyle(
                        color: widget.theme.textPrimary,
                        fontSize: 20,
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ),
                  IconButton(
                    onPressed: () => Navigator.of(context).pop(),
                    icon: Icon(Icons.close, color: widget.theme.textMuted),
                  )
                ],
              ),
              const SizedBox(height: 24),
              
              _buildInputField('Kaufkurs / Entry Price', _entryPriceCtrl, Icons.attach_money, onChanged: (_) => _recalcQuantity()),
              const SizedBox(height: 16),
              
              Row(
                children: [
                  Expanded(child: _buildInputField('Kapital (Position Size)', _positionSizeCtrl, Icons.account_balance_wallet, onChanged: (_) => _recalcQuantity())),
                  const SizedBox(width: 16),
                  Expanded(child: _buildInputField('Stückzahl (Quantity)', _quantityCtrl, Icons.format_list_numbered)),
                ],
              ),
              const SizedBox(height: 16),

              Row(
                children: [
                  Expanded(child: _buildInputField('Stop Loss', _stopLossCtrl, Icons.block)),
                  const SizedBox(width: 16),
                  Expanded(child: _buildInputField('Take Profit', _takeProfitCtrl, Icons.trending_up)),
                ],
              ),
              const SizedBox(height: 16),
              
              Row(
                children: [
                  Expanded(child: _buildInputField('Hebel (Leverage)', _leverageCtrl, Icons.speed)),
                  const SizedBox(width: 16),
                  Expanded(
                    child: CheckboxListTile(
                      title: Text('Sparplan', style: TextStyle(color: widget.theme.textPrimary, fontSize: 14)),
                      value: _isRecurring,
                      activeColor: widget.theme.primaryColor,
                      checkColor: Colors.white,
                      onChanged: (val) {
                        setState(() {
                          _isRecurring = val ?? false;
                        });
                      },
                      contentPadding: EdgeInsets.zero,
                      controlAffinity: ListTileControlAffinity.leading,
                    ),
                  ),
                ],
              ),
              const SizedBox(height: 16),
              _buildInputField('Notizen', _notesCtrl, Icons.edit),

              const SizedBox(height: 32),
              
              SizedBox(
                width: double.infinity,
                child: ElevatedButton(
                  onPressed: () {
                    final dto = TradeAcceptanceDto(
                      userId: widget.userId,
                      tradeId: widget.trade.id,
                      analysisId: widget.trade.analysisId,
                      isin: widget.trade.isin,
                      symbol: widget.trade.symbol,
                      actualEntryPrice: _parseNum(_entryPriceCtrl.text),
                      positionSize: _parseNum(_positionSizeCtrl.text),
                      leverageUsed: _parseNum(_leverageCtrl.text) ?? 1.0,
                      entryFee: _parseNum(_entryFeeCtrl.text) ?? 0.0,
                      exitFee: _parseNum(_exitFeeCtrl.text) ?? 0.0,
                      quantity: _parseNum(_quantityCtrl.text),
                      isRecurring: _isRecurring,
                      executionTimestamp: DateTime.now().toUtc(),
                      signalType: widget.trade.signalType,
                      entryPrice: widget.trade.entryPrice,
                      stopLoss: widget.trade.stopLoss,
                      takeProfit: widget.trade.takeProfit,
                      instrumentType: widget.trade.instrumentType,
                      timeframe: widget.trade.timeframe,
                      reasoning: widget.trade.reasoning,
                    );
                    Navigator.of(context).pop(dto);
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: widget.theme.primaryColor,
                    foregroundColor: Colors.white,
                    padding: const EdgeInsets.symmetric(vertical: 16),
                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
                  ),
                  child: const Text('Jetzt Ausführen', style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold)),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildInputField(String label, TextEditingController controller, IconData icon, {Function(String)? onChanged}) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(label, style: TextStyle(color: widget.theme.textSecondary, fontSize: 12)),
        const SizedBox(height: 6),
        TextField(
          controller: controller,
          style: TextStyle(color: widget.theme.textPrimary),
          keyboardType: const TextInputType.numberWithOptions(decimal: true),
          onChanged: onChanged,
          decoration: InputDecoration(
            prefixIcon: Icon(icon, color: widget.theme.textMuted, size: 18),
            filled: true,
            fillColor: widget.theme.darkBackground.withValues(alpha: 0.5),
            border: OutlineInputBorder(
              borderRadius: BorderRadius.circular(12),
              borderSide: BorderSide.none,
            ),
            contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
          ),
        ),
      ],
    );
  }
}