import 'package:flutter/material.dart';

import '../../../models/org_node.dart';
import '../../../services/api_client.dart';
import '../../../services/app_service.dart';
import '../../../services/upload_service.dart';
import '../../../utils/i10n.dart';

/// 渠道 / 代理节点的 App 版本管理对话框。
///
/// 对齐 Web 后台 `app-version-manage-dialog.vue`：每个组织（scope=ORG）
/// 至多维护一条版本配置，进入时按 [OrgNode.id] 拉取当前版本——
/// 有则进入「编辑」流程（含删除按钮），无则进入「新增」流程。
///
/// 字段与 Web 完全一致：版本名 / 版本号 / 下载地址 / 强制更新 / 弹窗提示；
/// 下载地址支持手动录入，或点击「上传文件」按钮直传 APK（对齐 Web 后台的 el-upload，
/// 经 /theme/upload/credential 取 STS 凭证直传 COS），上传成功后自动回填 URL。
///
/// 用法：
/// ```dart
/// showChannelVersionManageDialog(context, node: node);
/// ```
Future<void> showChannelVersionManageDialog(
  BuildContext context, {
  required OrgNode node,
}) {
  return showModalBottomSheet<void>(
    context: context,
    useSafeArea: true,
    isScrollControlled: true,
    builder: (_) => _ChannelVersionManageSheet(node: node),
  );
}

class _ChannelVersionManageSheet extends StatefulWidget {
  const _ChannelVersionManageSheet({required this.node});

  final OrgNode node;

  @override
  State<_ChannelVersionManageSheet> createState() =>
      _ChannelVersionManageSheetState();
}

class _ChannelVersionManageSheetState
    extends State<_ChannelVersionManageSheet> {
  final _nameCtrl = TextEditingController();
  final _codeCtrl = TextEditingController();
  final _urlCtrl = TextEditingController();

  /// 当前版本 ID（非空表示编辑态）。
  String? _versionId;
  bool _forceUpdate = false;
  bool _showPopup = true;

  bool _loading = true;
  bool _submitting = false;

  /// APK 上传中标记，上传期间禁用 URL 手动输入并禁用上传按钮。
  bool _uploading = false;

  /// APK 上传进度（0~100），仅在 [_uploading] 为 true 时展示。
  int _uploadProgress = 0;

  AppLocalizations get t => AppLocalizations.of(context);

  @override
  void initState() {
    super.initState();
    _loadCurrent();
  }

  @override
  void dispose() {
    _nameCtrl.dispose();
    _codeCtrl.dispose();
    _urlCtrl.dispose();
    super.dispose();
  }

  /// 进入时拉取该组织的当前版本配置，有则回填表单（编辑态），无则空表单（新增态）。
  Future<void> _loadCurrent() async {
    try {
      final data = await AppService().searchAppVersion(orgId: widget.node.id);
      if (!mounted) return;
      if (data != null) {
        _versionId = data['id']?.toString();
        _nameCtrl.text = data['versionName']?.toString() ?? '';
        final rawCode = data['versionCode'] ?? data['version_code'];
        _codeCtrl.text = rawCode?.toString() ?? '';
        _urlCtrl.text = (data['downloadUrl'] ?? data['download_url'] ?? data['apkUrl'])
                ?.toString() ??
            '';
        _forceUpdate = _toBool(data['forceUpdate'] ?? data['force_update']);
        _showPopup = _toBool(data['showPopup'] ?? data['show_popup'], fallback: true);
      }
    } catch (e) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(_errText(e))),
      );
    } finally {
      if (mounted) setState(() => _loading = false);
    }
  }

  bool _toBool(dynamic v, {bool fallback = false}) {
    if (v == null) return fallback;
    final n = int.tryParse(v.toString()) ?? 0;
    return n == 1;
  }

  String _errText(Object? e) =>
      e is ApiException ? e.message : (t.loadFailed);

  String get _title {
    final name = widget.node.name.trim();
    final action = _versionId != null ? t.editVersion : t.addVersion;
    return name.isNotEmpty ? '$action - $name' : action;
  }

  Future<void> _submit() async {
    final name = _nameCtrl.text.trim();
    final codeText = _codeCtrl.text.trim();
    final url = _urlCtrl.text.trim();

    if (name.isEmpty) {
      _snack(t.versionNameRequired);
      return;
    }
    final code = int.tryParse(codeText);
    if (code == null || code <= 0) {
      _snack(t.versionCodeRequired);
      return;
    }
    if (url.isEmpty) {
      _snack(t.versionUrlRequired);
      return;
    }
    if (!url.startsWith('http://') && !url.startsWith('https://')) {
      _snack(t.versionUrlInvalid);
      return;
    }

    setState(() => _submitting = true);
    final payload = <String, dynamic>{
      'scope': 'ORG',
      'orgId': widget.node.id,
      'versionName': name,
      'versionCode': code,
      'downloadUrl': url,
      'forceUpdate': _forceUpdate ? 1 : 0,
      'showPopup': _showPopup ? 1 : 0,
      if (_versionId != null) 'id': _versionId,
    };
    try {
      if (_versionId != null) {
        await AppService().updateAppVersion(payload);
      } else {
        await AppService().saveAppVersion(payload);
      }
      if (!mounted) return;
      Navigator.pop(context);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(t.saved)),
      );
    } catch (e) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(_errText(e))),
      );
    } finally {
      if (mounted) setState(() => _submitting = false);
    }
  }

  Future<void> _delete() async {
    final id = _versionId;
    if (id == null) return;
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: Text(t.confirmDelete),
        content: Text(t.versionDeleteConfirm),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx, false),
            child: Text(t.cancel),
          ),
          FilledButton(
            style: FilledButton.styleFrom(
              backgroundColor: Theme.of(context).colorScheme.error,
              foregroundColor: Theme.of(context).colorScheme.onError,
            ),
            onPressed: () => Navigator.pop(ctx, true),
            child: Text(t.delete),
          ),
        ],
      ),
    );
    if (confirmed != true) return;

    setState(() => _submitting = true);
    try {
      await AppService().deleteAppVersion([int.parse(id)]);
      if (!mounted) return;
      Navigator.pop(context);
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(t.versionDeleted)),
      );
    } catch (e) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(_errText(e))),
      );
    } finally {
      if (mounted) setState(() => _submitting = false);
    }
  }

  void _snack(String msg) {
    if (!mounted) return;
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
  }

  /// 选择 .apk 文件并直传腾讯云 COS，成功后把返回 URL 填回下载地址输入框。
  ///
  /// 对齐 Web 后台 `app-version-manage-dialog.vue` 的「上传文件」按钮：
  /// 点击 → 系统文件选择器（仅 .apk）→ 选完即传 → 回填 downloadUrl。
  Future<void> _pickAndUpload() async {
    // 1. 打开文件选择器，仅允许 .apk；用户取消返回 null。
    final picked = await UploadService.pickApkFile();
    if (!mounted) return;
    if (picked == null) return;

    // 2. 校验扩展名（选择器已限制，这里兜底）。
    if (!picked.name.toLowerCase().endsWith('.apk')) {
      _snack(t.pleaseSelectApk);
      return;
    }

    // 3. 进入上传态，统一在 finally 复位，避免 async 后 setState 崩溃。
    setState(() => _uploading = true);
    try {
      final url = await UploadService().uploadApkByOriginalName(
        picked,
        onProgress: (p) {
          if (mounted) setState(() => _uploadProgress = p);
        },
      );
      if (!mounted) return;
      // 4. 成功：回填下载地址并提示。
      _urlCtrl.text = url;
      _snack(t.uploadSuccess);
    } catch (e) {
      if (!mounted) return;
      _snack('${t.uploadFailed}：${_errText(e)}');
    } finally {
      if (mounted) {
        setState(() {
          _uploading = false;
          _uploadProgress = 0;
        });
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    final isEdit = _versionId != null;
    return Padding(
      padding: EdgeInsets.only(
        bottom: MediaQuery.of(context).viewInsets.bottom,
      ),
      child: SingleChildScrollView(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Padding(
              padding: const EdgeInsets.fromLTRB(16, 16, 16, 4),
              child: Text(
                _title,
                style: Theme.of(context).textTheme.titleMedium,
              ),
            ),
            const Divider(height: 16),
            Padding(
              padding: const EdgeInsets.symmetric(horizontal: 16),
              child: _loading
                  ? const Center(
                      child: Padding(
                        padding: EdgeInsets.symmetric(vertical: 24),
                        child: CircularProgressIndicator(),
                      ),
                    )
                  : Column(
                      mainAxisSize: MainAxisSize.min,
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        TextField(
                          controller: _nameCtrl,
                          decoration: InputDecoration(
                            labelText: t.versionName,
                            border: const OutlineInputBorder(),
                          ),
                        ),
                        const SizedBox(height: 12),
                        TextField(
                          controller: _codeCtrl,
                          keyboardType: TextInputType.number,
                          decoration: InputDecoration(
                            labelText: t.versionCode,
                            border: const OutlineInputBorder(),
                          ),
                        ),
                        const SizedBox(height: 12),
                        TextField(
                          controller: _urlCtrl,
                          keyboardType: TextInputType.url,
                          enabled: !_uploading,
                          decoration: InputDecoration(
                            labelText: t.downloadUrlHint,
                            border: const OutlineInputBorder(),
                            suffixIcon: TextButton.icon(
                              onPressed: _uploading ? null : _pickAndUpload,
                              icon: const Icon(Icons.upload),
                              label: _uploading
                                  ? Text('${t.uploading} $_uploadProgress%')
                                  : Text(t.uploadFile),
                            ),
                          ),
                        ),
                        const SizedBox(height: 16),
                        _SwitchRow(
                          label: t.forceUpdate,
                          value: _forceUpdate,
                          onChanged: (v) => setState(() => _forceUpdate = v),
                        ),
                        const SizedBox(height: 8),
                        _SwitchRow(
                          label: t.showPopup,
                          value: _showPopup,
                          onChanged: (v) => setState(() => _showPopup = v),
                        ),
                        const SizedBox(height: 20),
                        Row(
                          children: [
                            if (isEdit)
                              Expanded(
                                child: OutlinedButton.icon(
                                  onPressed: _submitting ? null : _delete,
                                  icon: const Icon(Icons.delete),
                                  style: OutlinedButton.styleFrom(
                                    foregroundColor:
                                        Theme.of(context).colorScheme.error,
                                  ),
                                  label: Text(t.delete),
                                ),
                              ),
                            if (isEdit) const SizedBox(width: 12),
                            Expanded(
                              child: OutlinedButton(
                                onPressed: _submitting
                                    ? null
                                    : () => Navigator.pop(context),
                                child: Text(t.cancel),
                              ),
                            ),
                            const SizedBox(width: 12),
                            Expanded(
                              child: FilledButton(
                                onPressed: _submitting ? null : _submit,
                                child: _submitting
                                    ? const SizedBox(
                                        width: 16,
                                        height: 16,
                                        child: CircularProgressIndicator(
                                          strokeWidth: 2,
                                        ),
                                      )
                                    : Text(isEdit ? t.save : t.add),
                              ),
                            ),
                          ],
                        ),
                        const SizedBox(height: 16),
                      ],
                    ),
            ),
          ],
        ),
      ),
    );
  }
}

/// 简易「是/否」开关行（对齐 Web 的 radio 否/是）。
class _SwitchRow extends StatelessWidget {
  const _SwitchRow({
    required this.label,
    required this.value,
    required this.onChanged,
  });

  final String label;
  final bool value;
  final ValueChanged<bool> onChanged;

  @override
  Widget build(BuildContext context) {
    final t = AppLocalizations.of(context);
    return Row(
      children: [
        SizedBox(
          width: 84,
          child: Text(
            label,
            style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                  color: Theme.of(context).colorScheme.onSurfaceVariant,
                ),
          ),
        ),
        SegmentedButton<bool>(
          segments: [
            ButtonSegment(value: false, label: Text(t.forceUpdateNo)),
            ButtonSegment(value: true, label: Text(t.forceUpdateYes)),
          ],
          selected: {value},
          onSelectionChanged: (set) => onChanged(set.first),
        ),
      ],
    );
  }
}