import 'dart:io' show Platform;

import 'package:flutter/material.dart';

import '../../core/contracts/library.dart';
import '../utils/format_utils.dart';
import 'app_loading_ring.dart';
import 'app_snack_bar.dart';
import 'frosted_panel.dart';


@immutable
class VersionSourceCardData {

  final String topLabel;


  final int? sizeBytes;


  final int? bitrate;


  final String serverName;


  final String serverKey;


  final String sourceKey;


  final List<String> mergedServerNames;


  final bool isCurrent;


  final bool selected;


  final Future<void> Function()? onTap;


  final String? tooltip;


  final String resolutionLabel;

  const VersionSourceCardData({
    required this.topLabel,
    required this.serverName,
    this.serverKey = '',
    this.sourceKey = '',
    this.mergedServerNames = const [],
    this.sizeBytes,
    this.bitrate,
    this.isCurrent = false,
    this.selected = false,
    this.onTap,
    this.tooltip,
    this.resolutionLabel = '',
  });


  factory VersionSourceCardData.fromCrossServer(
    CrossServerSourceCard card, {
    bool isCurrent = false,
    bool selected = false,
    Future<void> Function()? onTap,
  }) {
    final src = card.mediaSource;
    return VersionSourceCardData(
      topLabel: _topLabelFromQuality(card.quality),
      serverName: card.serverName,
      serverKey: card.serverId,
      sourceKey: '${card.serverId}|${card.mediaSourceId}',
      sizeBytes: src.Size,
      bitrate: src.Bitrate,
      isCurrent: isCurrent,
      selected: selected,
      onTap: onTap,
      tooltip: '切换到 ${card.serverName}',
      resolutionLabel: card.quality?.resolutionLabel ?? '',
    );
  }


  factory VersionSourceCardData.fromLocalSource(
    EmbyRawMediaSource source, {
    required String serverName,
    String serverKey = '',
    bool isCurrent = false,
    Future<void> Function()? onTap,
    String? tooltip,
  }) {
    final quality = MediaQualityInfo.fromMediaSource(source);
    return VersionSourceCardData(
      topLabel: _topLabelFromQuality(quality),
      serverName: serverName,
      serverKey: serverKey,
      sourceKey: '$serverKey|${source.Id ?? ''}',
      sizeBytes: source.Size,
      bitrate: source.Bitrate,
      isCurrent: isCurrent,
      onTap: onTap,
      tooltip: tooltip,
      resolutionLabel: quality.resolutionLabel,
    );
  }
}

String _abbrevRange(String label) {
  if (label.isEmpty) return 'SDR';
  if (label == 'Dolby Vision') return 'Dolby';
  return label;
}

String _topLabelFromQuality(MediaQualityInfo? quality) {
  final resolutionLabel = quality?.resolutionLabel ?? '';
  final rangeLabel = _abbrevRange(quality?.dynamicRangeLabel ?? '');
  final parts = <String>[];
  if (resolutionLabel.isNotEmpty) parts.add(resolutionLabel);
  parts.add(rangeLabel);
  return parts.join(' ');
}


class VersionSourceCard extends StatefulWidget {
  final VersionSourceCardData data;
  final bool compact;
  final VoidCallback? onMergedServersTap;

  const VersionSourceCard({
    super.key,
    required this.data,
    this.compact = false,
    this.onMergedServersTap,
  });

  @override
  State<VersionSourceCard> createState() => _VersionSourceCardState();
}

class _VersionSourceCardState extends State<VersionSourceCard> {
  bool _loading = false;

  Future<void> _open() async {
    final data = widget.data;
    if (_loading || data.isCurrent) return;
    final tap = data.onTap;
    if (tap == null) return;
    setState(() => _loading = true);
    try {
      await tap();
    } catch (_) {
      if (!mounted) return;
      showAppSnackBar(context, '切换服务器失败', tone: AppSnackTone.error);
    } finally {
      if (mounted) setState(() => _loading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final data = widget.data;
    final sizeBytes = data.sizeBytes;
    final bitrate = data.bitrate;

    final hasSize = sizeBytes != null && sizeBytes > 0;
    final hasBitrate = bitrate != null && bitrate > 0;
    final showInfoRow = hasSize || hasBitrate;
    final isCurrent = data.isCurrent;
    final highlighted = isCurrent || data.selected;
    final representedServerCount = data.mergedServerNames.length;
    final hasMergedServers = representedServerCount > 1;

    final isAndroid = Platform.isAndroid;
    final compact = widget.compact;
    final cardWidth = compact ? 130.0 : (isAndroid ? 170.0 : 220.0);
    final cardHeight = compact ? 52.0 : (isAndroid ? 100.0 : 120.0);
    final radius = compact ? 10.0 : 16.0;
    final textColor = Colors.white.withValues(alpha: 0.85);

    final card = SizedBox(
      width: cardWidth,
      height: cardHeight,
      child: Stack(
        fit: StackFit.expand,
        children: [
          FrostedPanel(
            radius: radius,
            padding: compact
                ? const EdgeInsets.symmetric(horizontal: 10, vertical: 6)
                : const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
            blurSigma: 15,
            border: Border.all(color: Colors.white.withValues(alpha: 0.08)),
            color: highlighted
                ? const Color(0xFF4F8DFF).withValues(alpha: 0.18)
                : Colors.white.withValues(alpha: 0.10),
            child: compact
                ? _buildCompactContent(data, hasMergedServers)
                : Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      Row(
                        children: [
                          Expanded(
                            child: Text(
                              data.topLabel,
                              style: TextStyle(
                                fontSize: isAndroid ? 16 : 18,
                                fontWeight: FontWeight.w700,
                                color: Colors.white,
                                height: 1.1,
                              ),
                              maxLines: 1,
                              overflow: TextOverflow.ellipsis,
                            ),
                          ),
                          if (isCurrent)
                            Container(
                              padding: const EdgeInsets.symmetric(
                                horizontal: 8,
                                vertical: 2,
                              ),
                              decoration: BoxDecoration(
                                color: const Color(0xFF4F8DFF),
                                borderRadius: BorderRadius.circular(999),
                              ),
                              child: const Text(
                                '当前',
                                style: TextStyle(
                                  fontSize: 11,
                                  fontWeight: FontWeight.w600,
                                  color: Colors.white,
                                ),
                              ),
                            ),
                        ],
                      ),
                      if (showInfoRow)
                        Row(
                          children: [
                            if (hasSize) ...[
                              Icon(
                                Icons.movie_outlined,
                                size: isAndroid ? 13 : 14,
                                color: textColor,
                              ),
                              SizedBox(width: isAndroid ? 3 : 4),
                              Flexible(
                                child: Text(
                                  formatFileSize(sizeBytes),
                                  maxLines: 1,
                                  overflow: TextOverflow.ellipsis,
                                  style: TextStyle(
                                    fontSize: isAndroid ? 12 : 13,
                                    color: textColor,
                                  ),
                                ),
                              ),
                            ],
                            if (hasSize && hasBitrate)
                              SizedBox(width: isAndroid ? 6 : 12),
                            if (hasBitrate) ...[
                              Icon(
                                Icons.equalizer,
                                size: isAndroid ? 13 : 14,
                                color: textColor,
                              ),
                              SizedBox(width: isAndroid ? 3 : 4),
                              Flexible(
                                child: Text(
                                  '${(bitrate / 1e6).toStringAsFixed(2)}Mbps',
                                  maxLines: 1,
                                  overflow: TextOverflow.ellipsis,
                                  style: TextStyle(
                                    fontSize: isAndroid ? 12 : 13,
                                    color: textColor,
                                  ),
                                ),
                              ),
                            ],
                          ],
                        ),
                      Row(
                        children: [
                          Container(
                            width: 8,
                            height: 8,
                            decoration: const BoxDecoration(
                              color: Color(0xFF4F8DFF),
                              shape: BoxShape.circle,
                            ),
                          ),
                          const SizedBox(width: 6),
                          Expanded(
                            child: Text(
                              data.serverName,
                              style: const TextStyle(
                                fontSize: 13,
                                fontWeight: FontWeight.w500,
                                color: Colors.white,
                              ),
                              maxLines: 1,
                              overflow: TextOverflow.ellipsis,
                            ),
                          ),
                          if (hasMergedServers) ...[
                            const SizedBox(width: 6),
                            _MergedServersButton(
                              serverCount: representedServerCount,
                              onTap: widget.onMergedServersTap,
                            ),
                          ],
                          const SizedBox(width: 6),
                          Icon(
                            Icons.bolt,
                            size: 14,
                            color: Colors.white.withValues(alpha: 0.85),
                          ),
                        ],
                      ),
                    ],
                  ),
          ),
          if (highlighted)
            Positioned.fill(
              child: IgnorePointer(
                child: DecoratedBox(
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(radius),
                    border: Border.all(
                      color: const Color(0xFF4F8DFF),
                      width: 1.5,
                    ),
                  ),
                ),
              ),
            ),
          if (_loading)
            Positioned.fill(
              child: ClipRRect(
                borderRadius: BorderRadius.circular(radius),
                child: Container(
                  color: Colors.black.withValues(alpha: 0.3),
                  child: Center(
                    child: AppLoadingRing(
                      size: compact ? 14.0 : 18.0,
                      color: Colors.white,
                    ),
                  ),
                ),
              ),
            ),
        ],
      ),
    );

    final tappable = GestureDetector(onTap: _open, child: card);

    final tooltip = data.tooltip;
    if (tooltip == null) return tappable;
    return Tooltip(message: tooltip, child: tappable);
  }

  Widget _buildCompactContent(
    VersionSourceCardData data,
    bool hasMergedServers,
  ) {
    final sizeBytes = data.sizeBytes;
    final secondaryColor = Colors.white.withValues(alpha: 0.65);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Row(
          children: [
            Expanded(
              child: Text(
                data.topLabel,
                style: const TextStyle(
                  fontSize: 13,
                  fontWeight: FontWeight.w700,
                  color: Colors.white,
                  height: 1.1,
                ),
                maxLines: 1,
                overflow: TextOverflow.ellipsis,
              ),
            ),
            if (data.isCurrent)
              Container(
                margin: const EdgeInsets.only(left: 4),
                padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
                decoration: BoxDecoration(
                  color: const Color(0xFF4F8DFF),
                  borderRadius: BorderRadius.circular(999),
                ),
                child: const Text(
                  '当前',
                  style: TextStyle(
                    fontSize: 9,
                    fontWeight: FontWeight.w600,
                    color: Colors.white,
                  ),
                ),
              ),
            if (hasMergedServers) ...[
              const SizedBox(width: 4),
              _MergedServersButton(
                serverCount: data.mergedServerNames.length,
                onTap: widget.onMergedServersTap,
                compact: true,
              ),
            ],
          ],
        ),
        const SizedBox(height: 3),
        Text(
          [
            if (sizeBytes != null && sizeBytes > 0) formatFileSize(sizeBytes),
            data.serverName,
          ].join(' · '),
          style: TextStyle(fontSize: 11, color: secondaryColor),
          maxLines: 1,
          overflow: TextOverflow.ellipsis,
        ),
      ],
    );
  }
}

class _MergedServersButton extends StatelessWidget {
  final int serverCount;
  final VoidCallback? onTap;
  final bool compact;

  const _MergedServersButton({
    required this.serverCount,
    required this.onTap,
    this.compact = false,
  });

  @override
  Widget build(BuildContext context) {
    final content = Container(
      padding: EdgeInsets.symmetric(
        horizontal: compact ? 4 : 6,
        vertical: compact ? 1 : 2,
      ),
      decoration: BoxDecoration(
        color: Colors.white.withValues(alpha: 0.12),
        borderRadius: BorderRadius.circular(999),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Text(
            '$serverCount服',
            style: TextStyle(
              fontSize: compact ? 9 : 10,
              fontWeight: FontWeight.w600,
              color: Colors.white70,
            ),
          ),
          const SizedBox(width: 2),
          Icon(
            Icons.keyboard_arrow_down_rounded,
            size: compact ? 11 : 13,
            color: Colors.white70,
          ),
        ],
      ),
    );

    final callback = onTap;
    if (callback == null) return content;
    return Tooltip(
      message: '选择其他服务器',
      child: MouseRegion(
        cursor: SystemMouseCursors.click,
        child: GestureDetector(
          behavior: HitTestBehavior.opaque,
          onTap: callback,
          child: content,
        ),
      ),
    );
  }
}