import 'package:flutter/material.dart';
import '../../../core/theme/app_theme.dart';
import '../../../core/widgets/glass_container.dart';
import '../../../core/widgets/status_badge.dart';
import '../models/trade_model.dart';
import 'trade_calculation_card.dart';
import 'trade_detail_modal.dart';

/// Migrated onto `ActiveTradeDto`. `trade.currentPrice` is the engine's own
/// tracked live price, so this card no longer needs to cross-reference the
/// favorites feed for a "live" quote — doing so would just be a second,
/// possibly-stale source of truth for a number the trade payload already
/// carries. The old "is this actually a derivative quote or the underlying's"
/// heuristic (comparing `entryPrice`/`actualEntryPrice` magnitudes) is gone
/// too: there is only one entry price now (`averageBuyIn`, the real
/// fill-weighted average), so there is nothing left to disambiguate.
class TradeCard extends StatelessWidget {
  final TradeModel trade;
  final VoidCallback? onAccept;
  final VoidCallback? onClose;
  final VoidCallback? onSettings;

  const TradeCard({
    super.key,
    required this.trade,
    this.onAccept,
    this.onClose,
    this.onSettings,
  });

  String _fmt(double val) => val.toStringAsFixed(2);

  @override
  Widget build(BuildContext context) {
    final isBuy = trade.direction.isLong;
    final signalColor = isBuy ? AppTheme.primaryEmerald : AppTheme.accentRed;
    final isProposed = trade.isProposed;
    final isActive = trade.isActive;
    final isClosed = trade.isClosed;

    // Server-computed, never recalculated client-side (Rules.md: don't
    // re-derive P&L — `pnlEur` picks realized vs. unrealized, `
    // unrealizedPnlPercent` is populated by the engine for both open and
    // closed trades since `CurrentPrice` is pinned to the close price once
    // a trade is closed).
    final pnlAbs = trade.pnlEur;
    final pnlPct = trade.unrealizedPnlPercent;
    final isPnlPos = pnlAbs >= 0;
    final pnlColor = isPnlPos ? AppTheme.primaryEmerald : AppTheme.accentRed;
    final currPrice = trade.currentPrice;
    final tpStages = trade.exitPlan.takeProfitStages;
    final primaryTp = trade.primaryTakeProfit;

    return GlassContainer(
      margin: const EdgeInsets.only(bottom: 14),
      padding: const EdgeInsets.all(16),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Header Row: Signal, Symbol, Drift-Radar & Live PnL
          Row(
            children: [
              Container(
                padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
                decoration: BoxDecoration(
                  color: signalColor.withValues(alpha: 0.15),
                  borderRadius: BorderRadius.circular(8),
                  border: Border.all(color: signalColor.withValues(alpha: 0.4)),
                ),
                child: Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Icon(isBuy ? Icons.trending_up : Icons.trending_down, size: 14, color: signalColor),
                    const SizedBox(width: 4),
                    Text(trade.direction.label, style: TextStyle(color: signalColor, fontWeight: FontWeight.bold, fontSize: 12)),
                  ],
                ),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      children: [
                        Flexible(
                          child: Text(
                            trade.symbol.isNotEmpty ? trade.symbol : (trade.underlyingIsin.isNotEmpty ? trade.underlyingIsin : 'Position'),
                            style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 16, color: Colors.white),
                            overflow: TextOverflow.ellipsis,
                          ),
                        ),
                        const SizedBox(width: 6),
                        Container(
                          padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
                          decoration: BoxDecoration(
                            color: Colors.white10,
                            borderRadius: BorderRadius.circular(4),
                          ),
                          child: Text(trade.instrumentType.label, style: TextStyle(color: AppTheme.textSecondary, fontSize: 10, fontWeight: FontWeight.bold)),
                        ),
                      ],
                    ),
                    const SizedBox(height: 2),
                    Text(
                      '${trade.symbol.isNotEmpty ? trade.symbol : ""}${trade.underlyingIsin.isNotEmpty ? " • ${trade.underlyingIsin}" : ""}',
                      style: TextStyle(color: AppTheme.textMuted, fontSize: 11),
                    ),
                  ],
                ),
              ),

              // Status / PnL / Drift-Radar Badge
              if (isActive || isClosed) ...[
                Container(
                  padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
                  decoration: BoxDecoration(
                    color: pnlColor.withValues(alpha: 0.12),
                    borderRadius: BorderRadius.circular(10),
                    border: Border.all(color: pnlColor.withValues(alpha: 0.3)),
                  ),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.end,
                    children: [
                      Text(
                        '${isPnlPos ? '+' : ''}€${pnlAbs.abs().toStringAsFixed(2)}',
                        style: TextStyle(color: pnlColor, fontWeight: FontWeight.w900, fontSize: 14),
                      ),
                      Text(
                        '${isPnlPos ? '+' : ''}${pnlPct.toStringAsFixed(2)}%',
                        style: TextStyle(color: pnlColor, fontSize: 11, fontWeight: FontWeight.bold),
                      ),
                    ],
                  ),
                ),
              ] else if (trade.isRejected) ...[
                StatusBadge(label: trade.status.label, color: AppTheme.accentRed),
              ] else ...[
                StatusBadge(label: trade.status.label, color: Colors.amber),
              ],
            ],
          ),

          // Active Drift Radar / Trailing Alert Indicator
          if (isActive) ...[
            const SizedBox(height: 10),
            _buildDriftRadarBar(trade),
          ],

          const SizedBox(height: 12),

          // Price Metrics Grid with Live Kurs & Trailing SL
          Container(
            padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(
              color: Colors.black.withValues(alpha: 0.25),
              borderRadius: BorderRadius.circular(10),
              border: Border.all(color: Colors.white.withValues(alpha: 0.06)),
            ),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceAround,
              children: [
                _priceItem('Einstieg', trade.averageBuyIn > 0 ? '€${_fmt(trade.averageBuyIn)}' : '–', Colors.white),
                _priceItem('Live-Kurs', currPrice > 0 ? '€${_fmt(currPrice)}' : '–', AppTheme.accentCyan),
                _priceItem(
                  trade.driftStatus == DriftStatus.trailingActive ? 'Stop (Trailing)' : 'Stop-Loss',
                  '€${_fmt(trade.currentStopLoss)}',
                  AppTheme.accentRed,
                ),
                _priceItem(
                  tpStages.length > 1 ? 'TP (1. Stufe)' : 'Take-Profit',
                  primaryTp != null ? '€${_fmt(primaryTp)}' : 'Trailing-Exit',
                  AppTheme.primaryEmerald,
                ),
              ],
            ),
          ),

          if (tpStages.length > 1) ...[
            const SizedBox(height: 8),
            Row(
              children: [
                Text(
                  'Ziele: ',
                  style: TextStyle(color: AppTheme.textMuted, fontSize: 11, fontWeight: FontWeight.bold),
                ),
                Expanded(
                  child: Wrap(
                    spacing: 6,
                    runSpacing: 4,
                    children: tpStages.map((stage) {
                      final isCurrent = primaryTp != null && (primaryTp - stage.targetPrice).abs() < 0.01;

                      return Container(
                        padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 2),
                        decoration: BoxDecoration(
                          color: isCurrent
                              ? AppTheme.primaryEmerald.withValues(alpha: 0.2)
                              : Colors.white.withValues(alpha: 0.05),
                          borderRadius: BorderRadius.circular(6),
                          border: Border.all(
                            color: isCurrent
                                ? AppTheme.primaryEmerald
                                : Colors.white.withValues(alpha: 0.15),
                          ),
                        ),
                        child: Text(
                          'TP${stage.stageNumber}: €${_fmt(stage.targetPrice)}',
                          style: TextStyle(
                            color: isCurrent ? AppTheme.primaryEmerald : Colors.white70,
                            fontSize: 10.5,
                            fontWeight: isCurrent ? FontWeight.w900 : FontWeight.bold,
                          ),
                        ),
                      );
                    }).toList(),
                  ),
                ),
              ],
            ),
          ],

          // Execution history (replaces the removed AI-Guardian hourly
          // check-in timeline, which no backend DTO produces anymore — this
          // is the trade's real fill history instead).
          if (trade.fills.isNotEmpty) ...[
            const SizedBox(height: 8),
            ExpansionTile(
              tilePadding: EdgeInsets.zero,
              childrenPadding: const EdgeInsets.only(bottom: 6),
              dense: true,
              leading: Icon(Icons.history_toggle_off, color: AppTheme.accentCyan, size: 18),
              title: Text(
                'Ausführungshistorie (${trade.fills.length} Fills)',
                style: TextStyle(color: AppTheme.accentCyan, fontSize: 12, fontWeight: FontWeight.bold),
              ),
              children: trade.fills.reversed.take(4).map((f) {
                return Container(
                  margin: const EdgeInsets.only(bottom: 6),
                  padding: const EdgeInsets.all(8),
                  decoration: BoxDecoration(
                    color: Colors.white.withValues(alpha: 0.03),
                    borderRadius: BorderRadius.circular(6),
                  ),
                  child: Row(
                    children: [
                      Text(
                        '${f.executedAtUtc.hour.toString().padLeft(2, '0')}:${f.executedAtUtc.minute.toString().padLeft(2, '0')}',
                        style: TextStyle(color: AppTheme.textMuted, fontSize: 11, fontWeight: FontWeight.bold),
                      ),
                      const SizedBox(width: 8),
                      Expanded(
                        child: Text(
                          '${_fmt(f.quantity)} Stk. @ €${_fmt(f.price)}',
                          style: TextStyle(color: AppTheme.textMuted, fontSize: 11),
                          maxLines: 1,
                          overflow: TextOverflow.ellipsis,
                        ),
                      ),
                    ],
                  ),
                );
              }).toList(),
            ),
          ],

          const SizedBox(height: 8),

          // Collapsible Live-Kalkulation & TP-Multi-Target Card
          TradeCalculationCard(trade: trade, isCollapsible: true, initiallyExpanded: false),

          const SizedBox(height: 12),

          // Footer Action Row
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(
                trade.exitPlan.strategyType.label,
                style: TextStyle(color: AppTheme.textMuted, fontSize: 11),
              ),

              Row(
                children: [
                  IconButton(
                    onPressed: () => TradeDetailModal.show(
                      context,
                      trade: trade,
                      onAccept: onAccept,
                      onClose: onClose,
                    ),
                    icon: Icon(Icons.info_outline, size: 18, color: AppTheme.accentCyan),
                    tooltip: 'Details',
                  ),
                  if (isProposed && onAccept != null) ...[
                    const SizedBox(width: 6),
                    ElevatedButton.icon(
                      onPressed: onAccept,
                      icon: const Icon(Icons.check_circle_outline, size: 16),
                      label: const Text('Trade Übernehmen'),
                      style: ElevatedButton.styleFrom(
                        backgroundColor: AppTheme.primaryEmerald,
                        foregroundColor: Colors.black,
                        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
                        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
                      ),
                    ),
                  ],
                  if (isActive && onClose != null) ...[
                    const SizedBox(width: 6),
                    OutlinedButton.icon(
                      onPressed: onClose,
                      icon: Icon(Icons.flag_outlined, size: 14, color: AppTheme.accentRed),
                      label: Text('Position Schließen', style: TextStyle(color: AppTheme.accentRed, fontSize: 12, fontWeight: FontWeight.bold)),
                      style: OutlinedButton.styleFrom(
                        side: BorderSide(color: AppTheme.accentRed.withValues(alpha: 0.5)),
                        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
                        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
                      ),
                    ),
                  ],
                  if (isActive && onSettings != null) ...[
                    const SizedBox(width: 6),
                    IconButton(
                      onPressed: onSettings,
                      icon: const Icon(Icons.settings, size: 16, color: Colors.white),
                      tooltip: 'Einstellungen anpassen',
                      style: IconButton.styleFrom(
                        backgroundColor: AppTheme.glassSurface,
                      ),
                    ),
                  ],
                ],
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildDriftRadarBar(TradeModel t) {
    Color col;
    String label;
    IconData icon;

    switch (t.driftStatus) {
      case DriftStatus.trailingActive:
        col = AppTheme.accentCyan;
        label = 'Drift-Radar: Trailing-Stop aktiv nachgezogen';
        icon = Icons.security;
        break;
      case DriftStatus.driftWarning:
        col = Colors.orangeAccent;
        label = 'Drift-Radar: Leichte Abweichung von Prognose';
        icon = Icons.tune;
        break;
      case DriftStatus.onTrack:
        col = AppTheme.primaryEmerald;
        label = 'Drift-Radar: Prognose intakt';
        icon = Icons.radar;
        break;
    }

    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
      decoration: BoxDecoration(
        color: col.withValues(alpha: 0.08),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: col.withValues(alpha: 0.25)),
      ),
      child: Row(
        children: [
          Icon(icon, color: col, size: 14),
          const SizedBox(width: 6),
          Expanded(
            child: Text(label, style: TextStyle(color: col, fontSize: 11, fontWeight: FontWeight.bold)),
          ),
        ],
      ),
    );
  }

  Widget _priceItem(String label, String val, Color valColor, {String? subtitle}) {
    return Column(
      children: [
        Text(label, style: TextStyle(color: AppTheme.textMuted, fontSize: 10)),
        const SizedBox(height: 2),
        Text(val, style: TextStyle(color: valColor, fontWeight: FontWeight.bold, fontSize: 12)),
        if (subtitle != null && subtitle.isNotEmpty) ...[
          const SizedBox(height: 1),
          Text(subtitle, style: TextStyle(color: AppTheme.accentCyan, fontSize: 9, fontWeight: FontWeight.w600)),
        ],
      ],
    );
  }
}