import 'package:flutter/material.dart';
import 'package:social_app/core/theme/design_tokens.dart';
import '../../data/models/tool_result.dart';

class UiSchemaRenderer {
  static Widget render(UiCard card) {
    switch (card.cardType) {
      case 'calendar_card.v1':
        return _renderCalendarCard(card);
      case 'error_card.v1':
        return _renderErrorCard(card);
      default:
        return _renderUnknownCard(card);
    }
  }

  static Widget _renderCalendarCard(UiCard card) {
    final data = CalendarCardData.fromJson(card.data);
    final color = data.color != null
        ? Color(int.parse(data.color!.replaceFirst('#', '0xFF')))
        : AppColors.blue500;

    return Container(
      decoration: BoxDecoration(
        color: AppColors.messageCardBg,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(color: AppColors.messageCardBorder),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Container(
            height: AppSpacing.sm,
            decoration: BoxDecoration(
              color: color,
              borderRadius: BorderRadius.only(
                topLeft: Radius.circular(AppRadius.lg),
                topRight: Radius.circular(AppRadius.lg),
              ),
            ),
          ),
          Padding(
            padding: EdgeInsets.all(AppSpacing.lg),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                if (data.sourceType == 'ai_generated')
                  Container(
                    padding: EdgeInsets.symmetric(
                      horizontal: AppSpacing.sm,
                      vertical: AppSpacing.xs,
                    ),
                    decoration: BoxDecoration(
                      color: AppColors.messageTagBg,
                      borderRadius: BorderRadius.circular(AppRadius.sm),
                    ),
                    child: Text(
                      'AI生成',
                      style: TextStyle(fontSize: 10, color: AppColors.blue600),
                    ),
                  ),
                if (data.sourceType == 'ai_generated')
                  SizedBox(height: AppSpacing.sm),
                Text(
                  _formatTime(data.startAt, data.endAt),
                  style: TextStyle(fontSize: 12, color: AppColors.slate500),
                ),
                SizedBox(height: AppSpacing.sm),
                Text(
                  data.title,
                  style: TextStyle(
                    fontSize: 16,
                    fontWeight: FontWeight.w600,
                    color: AppColors.slate900,
                  ),
                ),
                if (data.description != null) ...[
                  SizedBox(height: AppSpacing.xs),
                  Text(
                    data.description!,
                    style: TextStyle(fontSize: 14, color: AppColors.slate600),
                  ),
                ],
                if (data.location != null) ...[
                  SizedBox(height: AppSpacing.sm),
                  Row(
                    children: [
                      Icon(
                        Icons.location_on_outlined,
                        size: 16,
                        color: AppColors.slate500,
                      ),
                      SizedBox(width: AppSpacing.xs),
                      Text(
                        data.location!,
                        style: TextStyle(
                          fontSize: 12,
                          color: AppColors.slate500,
                        ),
                      ),
                    ],
                  ),
                ],
                if (card.actions != null && card.actions!.isNotEmpty) ...[
                  SizedBox(height: AppSpacing.md),
                  Wrap(
                    spacing: AppSpacing.sm,
                    children: card.actions!
                        .map((action) => _buildActionButton(action))
                        .toList(),
                  ),
                ],
              ],
            ),
          ),
        ],
      ),
    );
  }

  static Widget _buildActionButton(CardAction action) {
    final isPrimary = action.type == 'primary';
    return GestureDetector(
      onTap: () => _handleAction(action),
      child: Container(
        padding: EdgeInsets.symmetric(
          horizontal: AppSpacing.md,
          vertical: AppSpacing.sm,
        ),
        decoration: BoxDecoration(
          color: isPrimary ? AppColors.blue500 : AppColors.messageBtnWrap,
          borderRadius: BorderRadius.circular(AppRadius.sm),
          border: Border.all(
            color: isPrimary ? AppColors.blue500 : AppColors.messageBtnBorder,
          ),
        ),
        child: Text(
          action.label,
          style: TextStyle(
            fontSize: 14,
            color: isPrimary ? AppColors.white : AppColors.slate600,
          ),
        ),
      ),
    );
  }

  static Widget _renderErrorCard(UiCard card) {
    final message = card.data['message'] as String? ?? '发生错误';

    return Container(
      padding: EdgeInsets.all(AppSpacing.lg),
      decoration: BoxDecoration(
        color: AppColors.warningBackground,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(color: AppColors.red400),
      ),
      child: Row(
        children: [
          Icon(Icons.error_outline, size: 20, color: AppColors.red600),
          SizedBox(width: AppSpacing.sm),
          Expanded(
            child: Text(
              message,
              style: TextStyle(fontSize: 14, color: AppColors.red600),
            ),
          ),
        ],
      ),
    );
  }

  static Widget _renderUnknownCard(UiCard card) {
    return Container(
      padding: EdgeInsets.all(AppSpacing.lg),
      decoration: BoxDecoration(
        color: AppColors.messageCardBg,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(color: AppColors.border),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            '未知卡片类型: ${card.cardType}',
            style: TextStyle(
              fontSize: 14,
              fontWeight: FontWeight.w500,
              color: AppColors.slate600,
            ),
          ),
          SizedBox(height: AppSpacing.sm),
          Text(
            card.data.toString(),
            style: TextStyle(fontSize: 12, color: AppColors.slate500),
          ),
        ],
      ),
    );
  }

  static String _formatTime(String startAt, String? endAt) {
    try {
      final start = DateTime.parse(startAt);
      final buffer = StringBuffer();

      buffer.write('${start.month}月${start.day}日 ');
      buffer.write(
        '${start.hour.toString().padLeft(2, '0')}:${start.minute.toString().padLeft(2, '0')}',
      );

      if (endAt != null) {
        final end = DateTime.parse(endAt);
        buffer.write(
          ' - ${end.hour.toString().padLeft(2, '0')}:${end.minute.toString().padLeft(2, '0')}',
        );
      }

      return buffer.toString();
    } catch (e) {
      return startAt;
    }
  }

  static void _handleAction(CardAction action) {
    // TODO: 实现 action 处理
  }
}