import 'package:flutter/material.dart';

import '../../services/adb_service.dart';

class SettingsPage extends StatefulWidget {
  const SettingsPage({super.key, this.adbDiagnosticsLoader});

  final AdbDiagnosticsLoader? adbDiagnosticsLoader;

  @override
  State<SettingsPage> createState() => _SettingsPageState();
}

class _SettingsPageState extends State<SettingsPage> {
  AdbRuntimeDiagnostics? _diagnostics;
  bool _loading = false;
  Object? _loadError;

  Future<void> _loadDiagnostics() async {
    final loader = widget.adbDiagnosticsLoader;
    if (loader == null) return;
    setState(() {
      _loading = true;
      _loadError = null;
    });
    try {
      final diag = await loader();
      if (!mounted) return;
      setState(() {
        _diagnostics = diag;
        _loading = false;
      });
    } catch (e) {
      if (!mounted) return;
      setState(() {
        _loadError = e;
        _loading = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    final colorScheme = Theme.of(context).colorScheme;

    return SingleChildScrollView(
      padding: const EdgeInsets.fromLTRB(28, 0, 28, 28),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          Material(
            color: Colors.white,
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(8),
              side: BorderSide(color: colorScheme.outlineVariant),
            ),
            child: Padding(
              padding: const EdgeInsets.all(18),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    'Jenkins',
                    style: Theme.of(context).textTheme.titleMedium,
                  ),
                  const SizedBox(height: 14),
                  Row(
                    children: [
                      Expanded(
                        child: TextField(
                          decoration: const InputDecoration(
                            labelText: 'Base URL',
                            prefixIcon: Icon(Icons.dns_outlined),
                          ),
                        ),
                      ),
                      const SizedBox(width: 12),
                      Expanded(
                        child: TextField(
                          decoration: const InputDecoration(
                            labelText: '기본 Job',
                            prefixIcon: Icon(Icons.account_tree_outlined),
                          ),
                        ),
                      ),
                    ],
                  ),
                  const SizedBox(height: 14),
                  SegmentedButton<String>(
                    segments: const [
                      ButtonSegment(
                        value: 'manual',
                        label: Text('Token'),
                        icon: Icon(Icons.key),
                      ),
                      ButtonSegment(
                        value: 'webview',
                        label: Text('Web Login'),
                        icon: Icon(Icons.web_asset),
                      ),
                    ],
                    selected: const {'webview'},
                    onSelectionChanged: (_) {},
                  ),
                ],
              ),
            ),
          ),
          const SizedBox(height: 14),
          Material(
            color: Colors.white,
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(8),
              side: BorderSide(color: colorScheme.outlineVariant),
            ),
            child: Padding(
              padding: const EdgeInsets.all(18),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text('ADB', style: Theme.of(context).textTheme.titleMedium),
                  const SizedBox(height: 14),
                  Row(
                    children: [
                      Expanded(
                        child: TextField(
                          decoration: const InputDecoration(
                            labelText: 'adb path',
                            prefixIcon: Icon(Icons.terminal),
                          ),
                        ),
                      ),
                      const SizedBox(width: 12),
                      OutlinedButton.icon(
                        onPressed: () {},
                        icon: const Icon(Icons.search),
                        label: const Text('찾기'),
                      ),
                    ],
                  ),
                  const SizedBox(height: 8),
                  SwitchListTile(
                    contentPadding: EdgeInsets.zero,
                    value: true,
                    onChanged: (_) {},
                    title: const Text('설치 전 동일 패키지 업데이트'),
                    secondary: const Icon(Icons.update),
                  ),
                  if (widget.adbDiagnosticsLoader != null) ...[
                    const Divider(height: 24),
                    _AdbDiagnosticsSection(
                      diagnostics: _diagnostics,
                      loading: _loading,
                      loadError: _loadError,
                      onRefresh: _loadDiagnostics,
                    ),
                  ],
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class _AdbDiagnosticsSection extends StatelessWidget {
  const _AdbDiagnosticsSection({
    required this.diagnostics,
    required this.loading,
    required this.loadError,
    required this.onRefresh,
  });

  final AdbRuntimeDiagnostics? diagnostics;
  final bool loading;
  final Object? loadError;
  final VoidCallback onRefresh;

  @override
  Widget build(BuildContext context) {
    final textTheme = Theme.of(context).textTheme;
    final colorScheme = Theme.of(context).colorScheme;

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          children: [
            Text(
              'ADB 진단',
              style: textTheme.labelMedium?.copyWith(
                color: colorScheme.onSurfaceVariant,
              ),
            ),
            const SizedBox(width: 8),
            if (loading)
              Icon(
                key: const ValueKey('adb-diag-loading'),
                Icons.hourglass_empty,
                size: 14,
                color: colorScheme.onSurfaceVariant,
              )
            else
              InkWell(
                onTap: onRefresh,
                child: Icon(
                  Icons.refresh,
                  size: 16,
                  color: colorScheme.onSurfaceVariant,
                ),
              ),
          ],
        ),
        const SizedBox(height: 8),
        if (loadError != null)
          Text(
            '진단 로드 실패',
            style: textTheme.bodySmall?.copyWith(color: colorScheme.error),
          )
        else if (diagnostics == null && !loading)
          Text(
            '진단 정보 없음',
            style: textTheme.bodySmall?.copyWith(
              color: colorScheme.onSurfaceVariant,
            ),
          )
        else if (diagnostics != null)
          _DiagRows(diagnostics: diagnostics!),
      ],
    );
  }
}

class _DiagRows extends StatelessWidget {
  const _DiagRows({required this.diagnostics});

  final AdbRuntimeDiagnostics diagnostics;

  @override
  Widget build(BuildContext context) {
    final rt = diagnostics.runtime;
    final sha = diagnostics.sha256;
    final shortSha = sha != null && sha.length >= 12 ? sha.substring(0, 12) : sha;

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        _DiagRow(
          key: const ValueKey('diag-source'),
          label: '소스',
          value: _sourceLabel(rt.source, rt.fallbackUsed),
        ),
        _DiagRow(
          key: const ValueKey('diag-path'),
          label: '경로',
          value: rt.executablePath,
        ),
        _DiagRow(
          key: const ValueKey('diag-port'),
          label: '서버 포트',
          value: rt.serverPort.toString(),
        ),
        if (diagnostics.version != null)
          _DiagRow(
            key: const ValueKey('diag-version'),
            label: '버전',
            value: diagnostics.version!.split('\n').first,
          ),
        if (diagnostics.versionError != null)
          _DiagRow(
            key: const ValueKey('diag-version-error'),
            label: '버전 오류',
            value: diagnostics.versionError!,
            isError: true,
          ),
        if (shortSha != null)
          _DiagRow(
            key: const ValueKey('diag-hash'),
            label: 'SHA-256',
            value: shortSha,
          ),
      ],
    );
  }

  String _sourceLabel(AdbExecutableSource source, bool fallback) {
    return switch (source) {
      AdbExecutableSource.bundled => 'bundled',
      AdbExecutableSource.custom => 'custom',
      AdbExecutableSource.system => fallback ? 'system (fallback)' : 'system',
    };
  }
}

class _DiagRow extends StatelessWidget {
  const _DiagRow({
    super.key,
    required this.label,
    required this.value,
    this.isError = false,
  });

  final String label;
  final String value;
  final bool isError;

  @override
  Widget build(BuildContext context) {
    final textTheme = Theme.of(context).textTheme;
    final colorScheme = Theme.of(context).colorScheme;

    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 2),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            width: 72,
            child: Text(
              label,
              style: textTheme.bodySmall?.copyWith(
                color: colorScheme.onSurfaceVariant,
              ),
            ),
          ),
          Expanded(
            child: Text(
              value,
              maxLines: 1,
              overflow: TextOverflow.ellipsis,
              style: textTheme.bodySmall?.copyWith(
                color: isError ? colorScheme.error : null,
                fontFamily: 'monospace',
              ),
            ),
          ),
        ],
      ),
    );
  }
}