import 'package:flutter/material.dart';
import 'package:get/get.dart';
import '../controllers/wakeup_voice_controller.dart';

class WakeupVoiceView extends GetView<WakeupVoiceController> {
  const WakeupVoiceView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;
    return Scaffold(
      backgroundColor: isDark ? Colors.black : Colors.grey[50],
      body: Obx(() {
        // 顶部渐变头部 + 内容
        return CustomScrollView(
          slivers: [
            SliverAppBar(
              pinned: true,
              elevation: 0,
              centerTitle: true,
              backgroundColor: Colors.transparent,
              flexibleSpace: _buildHeader(isDark),
              expandedHeight: 180,
              leading: IconButton(
                icon: const Icon(Icons.arrow_back_ios, color: Colors.white),
                onPressed: () => Get.back(),
              ),
              title: const Text('唤醒词管理',
                  style: TextStyle(color: Colors.white, fontSize: 18)),
              actions: const [
                Padding(
                  padding: EdgeInsets.only(right: 12),
                  child: Icon(Icons.more_vert, color: Colors.white),
                )
              ],
            ),
            SliverToBoxAdapter(
              child: Padding(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    _buildCurrentWakeWordCard(isDark),
                    const SizedBox(height: 16),
                    _buildAvailableWakeWords(isDark),
                  ],
                ),
              ),
            ),
          ],
        );
      }),
    );
  }

  // 顶部渐变头部
  Widget _buildHeader(bool isDark) {
    final connected = controller.isConnected.value;
    final deviceName = controller.deviceName.value.isEmpty
        ? '未连接设备'
        : controller.deviceName.value;
    return Container(
      decoration: const BoxDecoration(
        gradient: LinearGradient(
          begin: Alignment.topLeft,
          end: Alignment.bottomRight,
          colors: [Color(0xFF6A5AE0), Color(0xFF8A65E6)],
        ),
      ),
      child: SafeArea(
        bottom: false,
        child: Padding(
          padding: const EdgeInsets.fromLTRB(16, 56, 16, 16),
          child: Row(
            children: [
              Container(
                width: 56,
                height: 56,
                decoration: BoxDecoration(
                  color: Colors.white.withOpacity(0.15),
                  borderRadius: BorderRadius.circular(12),
                ),
                child: const Icon(Icons.headset, color: Colors.white, size: 28),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Text(deviceName,
                        style: const TextStyle(
                            color: Colors.white,
                            fontSize: 18,
                            fontWeight: FontWeight.w600)),
                    const SizedBox(height: 6),
                    Row(
                      children: [
                        Container(
                          width: 8,
                          height: 8,
                          decoration: BoxDecoration(
                            color: connected ? Colors.greenAccent : Colors.red,
                            shape: BoxShape.circle,
                          ),
                        ),
                        const SizedBox(width: 6),
                        Text(connected ? '已连接' : '未连接',
                            style: const TextStyle(
                                color: Colors.white70, fontSize: 12)),
                      ],
                    )
                  ],
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  // 当前唤醒词卡片
  Widget _buildCurrentWakeWordCard(bool isDark) {
    final curId = controller.currentDeviceVoiceId.value;
    final curVer = controller.currentDeviceVoiceVersion.value;
    WakeupVoiceItem? curItem;
    for (final v in controller.voices) {
      if (v.id == curId) {
        curItem = v;
        break;
      }
    }
    final title = '当前唤醒词';
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Text(title,
                style:
                    const TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
            Text(curVer != null ? 'v$curVer' : '',
                style: const TextStyle(color: Colors.grey, fontSize: 12)),
          ],
        ),
        const SizedBox(height: 8),
        _buildVoiceCard(
          isDark: isDark,
          item: curItem,
          isCurrent: true,
          hasUpdate: _hasUpdateForCurrent(curItem),
        ),
      ],
    );
  }

  // 可用唤醒词列表
  Widget _buildAvailableWakeWords(bool isDark) {
    final curId = controller.currentDeviceVoiceId.value;
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const Text('可用唤醒词',
            style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
        const SizedBox(height: 12),
        if (controller.loadError.value.isNotEmpty)
          Text(controller.loadError.value,
              style: const TextStyle(color: Colors.red)),
        ...controller.voices.where((v) => v.id != curId).map(
            (v) => _buildVoiceCard(isDark: isDark, item: v, isCurrent: false)),
        // 如果存在更新项（同ID但版本更高），也在此展示
        ...controller.voices
            .where((v) =>
                v.id == curId &&
                _versionHigherThan(
                    v.version, controller.currentDeviceVoiceVersion.value))
            .map((v) => _buildVoiceCard(
                  isDark: isDark,
                  item: v,
                  isCurrent: false,
                  hasUpdate: true,
                )),
      ],
    );
  }

  bool _versionHigherThan(String a, String? b) {
    if (b == null) return true;
    // 简易版本比较：按点位分割逐段比较
    List<int> pa = a.split('.').map((e) => int.tryParse(e) ?? 0).toList();
    List<int> pb = b.split('.').map((e) => int.tryParse(e) ?? 0).toList();
    for (int i = 0; i < 3; i++) {
      final va = i < pa.length ? pa[i] : 0;
      final vb = i < pb.length ? pb[i] : 0;
      if (va != vb) return va > vb;
    }
    return false;
  }

  bool _hasUpdateForCurrent(WakeupVoiceItem? curItem) {
    if (curItem == null) return false;
    final curVer = controller.currentDeviceVoiceVersion.value;
    return _versionHigherThan(curItem.version, curVer);
  }

  Widget _buildVoiceCard({
    required bool isDark,
    required WakeupVoiceItem? item,
    required bool isCurrent,
    bool hasUpdate = false,
  }) {
    if (item == null) {
      return Container(
        padding: const EdgeInsets.all(16),
        decoration: BoxDecoration(
          color: isDark ? Colors.grey[900] : Colors.white,
          borderRadius: BorderRadius.circular(12),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withOpacity(0.05),
              blurRadius: 10,
              offset: const Offset(0, 2),
            ),
          ],
        ),
        child: const Text('未设置'),
      );
    }

    final accuracyText = controller.extractAccuracy(item) ?? '识别率 -';
    final showCheck = isCurrent && !hasUpdate;
    final actionColor =
        hasUpdate ? const Color(0xFFFF7A00) : const Color(0xFF6A5AE0);
    final actionText = hasUpdate ? '更新唤醒词' : '切换唤醒词';
    final isUpgrading =
        item != null && controller.upgradingVoiceId.value == item.id;
    final progress = controller.upgradeProgress.value;

    return Container(
      margin: const EdgeInsets.only(bottom: 12),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: isDark ? Colors.grey[900] : Colors.white,
        borderRadius: BorderRadius.circular(12),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.05),
            blurRadius: 10,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                width: 40,
                height: 40,
                decoration: BoxDecoration(
                  color: (hasUpdate
                      ? const Color(0xFFFFE8D5)
                      : const Color(0xFFE8E5FF)),
                  borderRadius: BorderRadius.circular(10),
                ),
                child: Icon(
                  hasUpdate ? Icons.mic : Icons.auto_awesome,
                  color: hasUpdate
                      ? const Color(0xFFFF7A00)
                      : const Color(0xFF6A5AE0),
                ),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      children: [
                        Expanded(
                          child: Text(item.name,
                              style: const TextStyle(
                                  fontSize: 15, fontWeight: FontWeight.w600)),
                        ),
                        Text('v${item.version}',
                            style: const TextStyle(
                                fontSize: 12, color: Colors.grey)),
                      ],
                    ),
                    const SizedBox(height: 4),
                    Text(accuracyText,
                        style:
                            const TextStyle(fontSize: 12, color: Colors.grey)),
                  ],
                ),
              ),
              if (showCheck) ...[
                const SizedBox(width: 8),
                const Icon(Icons.check_circle, color: Color(0xFF6A5AE0)),
              ]
            ],
          ),
          if (hasUpdate) ...[
            const SizedBox(height: 12),
            Container(
              padding: const EdgeInsets.all(12),
              decoration: BoxDecoration(
                color: isDark ? Colors.grey[850] : const Color(0xFFFFF4E8),
                borderRadius: BorderRadius.circular(8),
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: const [
                      Icon(Icons.upgrade, color: Color(0xFFFF7A00), size: 18),
                      SizedBox(width: 6),
                      Text('更新内容',
                          style: TextStyle(
                              fontSize: 13,
                              fontWeight: FontWeight.w600,
                              color: Color(0xFFFF7A00))),
                    ],
                  ),
                  const SizedBox(height: 6),
                  ...controller.extractUpdateNotes(item).map((note) => Padding(
                        padding: const EdgeInsets.symmetric(vertical: 2),
                        child: Row(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            const Text('• ',
                                style: TextStyle(color: Colors.black54)),
                            Expanded(
                              child: Text(note,
                                  style: const TextStyle(
                                      fontSize: 12, color: Colors.black87)),
                            )
                          ],
                        ),
                      )),
                ],
              ),
            ),
          ],
          const SizedBox(height: 12),
          SizedBox(
            width: double.infinity,
            child: ElevatedButton(
              style: ElevatedButton.styleFrom(
                backgroundColor: actionColor,
                padding: const EdgeInsets.symmetric(vertical: 12),
                shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(10)),
              ),
              onPressed: isUpgrading
                  ? null
                  : () {
                      if (hasUpdate) {
                        controller.upgradeWakeVoiceTo(item);
                      } else {
                        controller.switchWakeVoiceTo(item);
                      }
                    },
              child: Text(actionText),
            ),
          ),
          if (isUpgrading) ...[
            const SizedBox(height: 12),
            Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    const Icon(Icons.sync, size: 16, color: Color(0xFF6A5AE0)),
                    const SizedBox(width: 6),
                    Text('升级中... $progress%',
                        style: const TextStyle(
                            fontSize: 12, color: Colors.black54)),
                  ],
                ),
                const SizedBox(height: 6),
                ClipRRect(
                  borderRadius: BorderRadius.circular(6),
                  child: LinearProgressIndicator(
                    value: (progress.clamp(0, 100)) / 100.0,
                    minHeight: 8,
                    backgroundColor:
                        isDark ? Colors.grey[800] : Colors.grey[300],
                    color: const Color(0xFF6A5AE0),
                  ),
                ),
              ],
            ),
          ],
        ],
      ),
    );
  }
  // 底部按钮已移除，改为每个卡片独立的操作按钮以贴合设计
}