mail-hub/lib/ui/widgets/email_list_tile.dart

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

import '../../core/models/email.dart';

/// 邮件列表项
class EmailListTile extends StatelessWidget {
  final Email email;
  final bool selected;
  final VoidCallback onTap;
  final VoidCallback? onFlag;

  const EmailListTile({
    super.key,
    required this.email,
    required this.selected,
    required this.onTap,
    this.onFlag,
  });

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final bg = selected
        ? scheme.primaryContainer.withValues(alpha: 0.45)
        : email.seen
            ? Colors.transparent
            : scheme.surfaceContainerHighest.withValues(alpha: 0.35);

    return Material(
      color: bg,
      child: InkWell(
        onTap: onTap,
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              // 已读/未读圆点
              Padding(
                padding: const EdgeInsets.only(top: 6),
                child: email.seen
                    ? const SizedBox(width: 8)
                    : Container(
                        width: 8,
                        height: 8,
                        decoration: BoxDecoration(
                          color: scheme.primary,
                          shape: BoxShape.circle,
                        ),
                      ),
              ),
              const SizedBox(width: 8),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      children: [
                        Expanded(
                          child: Text(
                            email.fromLabel.isEmpty ? '(无发件人)' : email.fromLabel,
                            maxLines: 1,
                            overflow: TextOverflow.ellipsis,
                            style: TextStyle(
                              fontSize: 14,
                              fontWeight: email.seen ? FontWeight.w500 : FontWeight.w700,
                              color: email.seen ? scheme.onSurface : scheme.onSurface,
                            ),
                          ),
                        ),
                        const SizedBox(width: 8),
                        Text(
                          _formatDate(email.date),
                          style: TextStyle(fontSize: 12, color: scheme.onSurfaceVariant),
                        ),
                      ],
                    ),
                    const SizedBox(height: 3),
                    Text(
                      email.subject.isEmpty ? '(无主题)' : email.subject,
                      maxLines: 1,
                      overflow: TextOverflow.ellipsis,
                      style: TextStyle(
                        fontSize: 13.5,
                        fontWeight: email.seen ? FontWeight.w400 : FontWeight.w600,
                        color: email.seen ? scheme.onSurfaceVariant : scheme.onSurface,
                      ),
                    ),
                    if (email.snippet.isNotEmpty) ...[
                      const SizedBox(height: 2),
                      Text(
                        email.snippet,
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        style: TextStyle(
                          fontSize: 12,
                          color: scheme.onSurfaceVariant.withValues(alpha: 0.8),
                        ),
                      ),
                    ],
                  ],
                ),
              ),
              const SizedBox(width: 6),
              // 附件 / 星标
              Column(
                children: [
                  if (email.hasAttachments)
                    Icon(Icons.attach_file,
                        size: 16, color: scheme.onSurfaceVariant),
                  if (email.hasAttachments) const SizedBox(height: 2),
                  IconButton(
                    visualDensity: VisualDensity.compact,
                    constraints: const BoxConstraints(),
                    padding: EdgeInsets.zero,
                    iconSize: 19,
                    icon: Icon(
                      email.flagged ? Icons.star : Icons.star_border,
                      color: email.flagged ? Colors.amber : scheme.outlineVariant,
                    ),
                    onPressed: onFlag,
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }

  String _formatDate(DateTime? date) {
    if (date == null) return '';
    final now = DateTime.now();
    final today = DateTime(now.year, now.month, now.day);
    final d = DateTime(date.year, date.month, date.day);
    final diff = today.difference(d).inDays;
    if (diff == 0) {
      return DateFormat('HH:mm').format(date);
    }
    if (diff == 1) return '昨天';
    if (diff < 7) {
      const week = ['周一', '周二', '周三', '周四', '周五', '周六', '周日'];
      return week[date.weekday - 1];
    }
    if (date.year == now.year) {
      return DateFormat('M/d').format(date);
    }
    return DateFormat('yyyy/M/d').format(date);
  }
}