import 'package:flutter/material.dart';

import '../../../../common/theme/theme.dart';
import '../../../../sample/community_sample_data.dart';
import '../community_ui.dart';

/// Kartu postingan. [expanded] menampilkan teks penuh (halaman detail).
class CommunityPostCard extends StatefulWidget {
  const CommunityPostCard({
    super.key,
    required this.post,
    this.onTap,
    this.onGroupTap,
    this.expanded = false,
  });

  final CommunityPost post;
  final VoidCallback? onTap;
  final VoidCallback? onGroupTap;
  final bool expanded;

  @override
  State<CommunityPostCard> createState() => _CommunityPostCardState();
}

class _CommunityPostCardState extends State<CommunityPostCard> {
  late bool _isLiked = widget.post.isLiked;
  late int _likeCount = widget.post.likeCount;
  bool _isSaved = false;

  void _toggleLike() {
    setState(() {
      _isLiked = !_isLiked;
      _likeCount += _isLiked ? 1 : -1;
    });
  }

  @override
  Widget build(BuildContext context) {
    final post = widget.post;

    return Container(
      margin: const EdgeInsets.fromLTRB(16, 0, 16, 14),
      decoration: communityCardDecoration(),
      child: Material(
        type: MaterialType.transparency,
        child: InkWell(
          borderRadius: BorderRadius.circular(20),
          onTap: widget.onTap,
          child: Padding(
            padding: const EdgeInsets.fromLTRB(16, 16, 16, 8),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                _buildHeader(post),
                const SizedBox(height: 12),
                Text(
                  post.content,
                  maxLines: widget.expanded ? null : 4,
                  overflow: widget.expanded ? null : TextOverflow.ellipsis,
                  style: AppStyle.md.copyWith(
                    height: 1.5,
                    fontWeight: FontWeight.w500,
                  ),
                ),
                if (post.image != null) ...[
                  const SizedBox(height: 12),
                  ClipRRect(
                    borderRadius: BorderRadius.circular(16),
                    child: AspectRatio(
                      aspectRatio: 16 / 10,
                      child: Image.asset(post.image!, fit: BoxFit.cover),
                    ),
                  ),
                ],
                if (post.merchantName != null) ...[
                  const SizedBox(height: 10),
                  _MerchantTag(name: post.merchantName!),
                ],
                const SizedBox(height: 6),
                _buildActions(post),
              ],
            ),
          ),
        ),
      ),
    );
  }

  Widget _buildHeader(CommunityPost post) {
    return Row(
      children: [
        CommunityAvatar(member: post.author, size: 42),
        const SizedBox(width: 10),
        Expanded(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Flexible(
                    child: Text(
                      post.author.name,
                      maxLines: 1,
                      overflow: TextOverflow.ellipsis,
                      style: AppStyle.md.copyWith(fontWeight: FontWeight.w700),
                    ),
                  ),
                  if (post.author.badge != null) ...[
                    const SizedBox(width: 6),
                    _AuthorBadge(label: post.author.badge!),
                  ],
                ],
              ),
              const SizedBox(height: 2),
              GestureDetector(
                onTap: widget.onGroupTap,
                child: Text.rich(
                  TextSpan(
                    children: [
                      TextSpan(
                        text: '${post.group.emoji} ${post.group.name}',
                        style: const TextStyle(
                          color: AppColor.textPrimary,
                          fontWeight: FontWeight.w600,
                        ),
                      ),
                      TextSpan(text: '  ·  ${formatTimeAgo(post.createdAt)}'),
                    ],
                  ),
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: AppStyle.xs.copyWith(color: CommunityColor.muted),
                ),
              ),
            ],
          ),
        ),
        IconButton(
          onPressed: () {},
          visualDensity: VisualDensity.compact,
          icon: const Icon(
            Icons.more_horiz_rounded,
            color: CommunityColor.muted,
          ),
        ),
      ],
    );
  }

  Widget _buildActions(CommunityPost post) {
    return Row(
      children: [
        _ActionButton(
          icon: _isLiked
              ? Icons.favorite_rounded
              : Icons.favorite_border_rounded,
          label: formatCompact(_likeCount),
          color: _isLiked ? AppColor.primary : CommunityColor.muted,
          onTap: _toggleLike,
        ),
        _ActionButton(
          icon: Icons.chat_bubble_outline_rounded,
          label: formatCompact(post.commentCount),
          color: CommunityColor.muted,
          onTap: widget.onTap,
        ),
        _ActionButton(
          icon: Icons.ios_share_rounded,
          label: 'Bagikan',
          color: CommunityColor.muted,
          onTap: () {},
        ),
        const Spacer(),
        IconButton(
          onPressed: () => setState(() => _isSaved = !_isSaved),
          visualDensity: VisualDensity.compact,
          icon: Icon(
            _isSaved ? Icons.bookmark_rounded : Icons.bookmark_border_rounded,
            size: 22,
            color: _isSaved ? AppColor.primary : CommunityColor.muted,
          ),
        ),
      ],
    );
  }
}

class _AuthorBadge extends StatelessWidget {
  const _AuthorBadge({required this.label});

  final String label;

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
      decoration: BoxDecoration(
        color: CommunityColor.blush,
        borderRadius: BorderRadius.circular(999),
      ),
      child: Text(
        label,
        style: AppStyle.xs.copyWith(
          fontSize: 10,
          color: AppColor.primary,
          fontWeight: FontWeight.w700,
        ),
      ),
    );
  }
}

class _MerchantTag extends StatelessWidget {
  const _MerchantTag({required this.name});

  final String name;

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
      decoration: BoxDecoration(
        color: CommunityColor.background,
        borderRadius: BorderRadius.circular(999),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          const Icon(
            Icons.storefront_rounded,
            size: 14,
            color: AppColor.primary,
          ),
          const SizedBox(width: 6),
          Text(name, style: AppStyle.xs.copyWith(fontWeight: FontWeight.w700)),
        ],
      ),
    );
  }
}

class _ActionButton extends StatelessWidget {
  const _ActionButton({
    required this.icon,
    required this.label,
    required this.color,
    this.onTap,
  });

  final IconData icon;
  final String label;
  final Color color;
  final VoidCallback? onTap;

  @override
  Widget build(BuildContext context) {
    return InkWell(
      onTap: onTap,
      borderRadius: BorderRadius.circular(999),
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
        child: Row(
          children: [
            AnimatedSwitcher(
              duration: const Duration(milliseconds: 200),
              transitionBuilder: (child, animation) =>
                  ScaleTransition(scale: animation, child: child),
              child: Icon(icon, key: ValueKey(icon), size: 20, color: color),
            ),
            const SizedBox(width: 6),
            Text(
              label,
              style: AppStyle.sm.copyWith(
                color: color,
                fontWeight: FontWeight.w600,
              ),
            ),
          ],
        ),
      ),
    );
  }
}