import 'package:flutter/material.dart';
import '../../../../core/theme/app_theme.dart';
import '../../../../core/theme/app_theme_extension.dart';
import '../../../../core/theme/app_spacing.dart';
import '../../../../data/models/account_models.dart';
import '../../../components/glass_panel.dart';

/// 持仓区域 — .pen nodes th9BG (header) + 6X6tC (card)
/// Holdings Header: "交易账户持仓" 16px w600 $text-primary | "查看全部 >" 12px normal $text-secondary
/// Holdings Card: cornerRadius lg, fill $surface-card, stroke $border-default 1px
class HoldingsSection extends StatelessWidget {
  final List holdings;

  const HoldingsSection({super.key, required this.holdings});

  @override
  Widget build(BuildContext context) {
    final colorScheme = Theme.of(context).colorScheme;

    return Column(
      children: [
        // Header row: "交易账户持仓" + "查看全部 >"
        Padding(
          padding: const EdgeInsets.only(bottom: AppSpacing.sm),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(
                '交易账户持仓',
                style: AppTextStyles.headlineLarge(context),
              ),
              Text(
                '查看全部 >',
                style: AppTextStyles.bodyMedium(context).copyWith(
                  color: colorScheme.onSurfaceVariant,
                  fontWeight: FontWeight.w400,
                ),
              ),
            ],
          ),
        ),
        // Holdings card — uses real provider.holdings data
        if (holdings.isEmpty)
          Padding(
            padding: const EdgeInsets.all(AppSpacing.xl),
            child: Text(
              '暂无持仓',
              style: AppTextStyles.bodyLarge(context).copyWith(
                color: colorScheme.onSurfaceVariant,
              ),
            ),
          )
        else
          GlassPanel(
            padding: EdgeInsets.zero,
            borderRadius: BorderRadius.circular(AppRadius.lg),
            child: Column(
              children: List.generate(holdings.length, (index) {
                final h = holdings[index] as AccountTrade;
                final isProfit = h.profitRate >= 0;
                return Column(
                  children: [
                    HoldingRow(
                      coinCode: h.coinCode,
                      quantity: double.tryParse(h.quantity)?.toStringAsFixed(4) ?? h.quantity,
                      value: '${double.tryParse(h.currentValue)?.toStringAsFixed(2) ?? h.currentValue} USDT',
                      profitRate: '${isProfit ? '+' : ''}${h.profitRate.toStringAsFixed(2)}%',
                      isProfit: isProfit,
                    ),
                    if (index < holdings.length - 1) const HoldingDivider(),
                  ],
                );
              }),
            ),
          ),
      ],
    );
  }
}

/// 持仓行分隔线 — .pen node BCCbR / yejhE
/// fill: $border-default, height: 1, opacity: 0.5
class HoldingDivider extends StatelessWidget {
  const HoldingDivider({super.key});

  @override
  Widget build(BuildContext context) {
    final colorScheme = Theme.of(context).colorScheme;
    return Container(
      height: 1,
      margin: const EdgeInsets.symmetric(horizontal: AppSpacing.md),
      color: colorScheme.outlineVariant.withValues(alpha: 0.5),
    );
  }
}

/// 持仓行 — matching .pen nodes dAt4j / eK6vq / jiSUK
/// padding [14, 16], space_between layout
/// Left: avatar circle (36x36, radius 18, fill $accent-light) + coin info (gap 2)
/// Right: value + pnl (gap 2, align end)
class HoldingRow extends StatelessWidget {
  final String coinCode;
  final String quantity;
  final String value;
  final String profitRate;
  final bool isProfit;

  const HoldingRow({
    super.key,
    required this.coinCode,
    required this.quantity,
    required this.value,
    required this.profitRate,
    required this.isProfit,
  });

  @override
  Widget build(BuildContext context) {
    final accentColor = context.appColors.accentPrimary;
    final accentBgColor = accentColor.withValues(alpha: 0.1);
    final profitColor = isProfit ? context.appColors.up : context.appColors.down;

    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: AppSpacing.md, vertical: 14),
      child: Row(
        children: [
          // Avatar circle with first letter — .pen SJNDJ/EjSIN/3GQ5M
          Container(
            width: 36,
            height: 36,
            decoration: BoxDecoration(
              color: accentBgColor,
              borderRadius: BorderRadius.circular(18),
            ),
            alignment: Alignment.center,
            child: Text(
              coinCode.substring(0, 1),
              style: AppTextStyles.headlineMedium(context).copyWith(
                fontWeight: FontWeight.w700,
                color: accentColor,
              ),
            ),
          ),
          const SizedBox(width: 10),
          // Coin name + quantity — .pen fivxJ/Kxv3d/5CsoQ
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisSize: MainAxisSize.min,
              children: [
                Text(
                  coinCode,
                  style: AppTextStyles.headlineMedium(context),
                ),
                const SizedBox(height: 2),
                Text(
                  quantity,
                  style: AppTextStyles.bodyMedium(context).copyWith(
                    fontWeight: FontWeight.w400,
                    color: context.colors.onSurfaceVariant,
                  ),
                ),
              ],
            ),
          ),
          // Value + profit rate — .pen vYJsU/2nLAg/IlWck
          Column(
            crossAxisAlignment: CrossAxisAlignment.end,
            mainAxisSize: MainAxisSize.min,
            children: [
              Text(
                value,
                style: AppTextStyles.numberMedium(context).copyWith(
                  fontSize: 13,
                ),
              ),
              const SizedBox(height: 2),
              Text(
                profitRate,
                style: AppTextStyles.numberSmall(context).copyWith(
                  color: profitColor,
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}