import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../../core/database/database_service.dart';
import '../../../core/theme/app_theme.dart';
import '../../device/providers/run_state_provider.dart';
import '../../programs/pages/programs_page.dart';
import '../../settings/pages/settings_page.dart';
import '../widgets/status_bar.dart';
import '../widgets/program_list.dart';
import '../widgets/running_control_panel.dart';
import '../widgets/run_status_monitor.dart';

/// 首页 - 设备控制面板 (暗色工业风格)
/// 布局：状态栏 + 导航标签栏 + 内容区（设备控制/程序管理/系统设置）
class HomePage extends ConsumerStatefulWidget {
  const HomePage({super.key});

  @override
  ConsumerState<HomePage> createState() => _HomePageState();
}

class _HomePageState extends ConsumerState<HomePage>
    with SingleTickerProviderStateMixin {
  bool _lightOn = false;
  final bool _ceramicSleeveInstalled = false; // TODO: 后续对接硬件传感器后改为可变状态
  int _currentIndex = 0;

  @override
  void initState() {
    super.initState();
    DatabaseService.instance.initTestData();
  }

  @override
  Widget build(BuildContext context) {
    final runState = ref.watch(runStateProvider);

    // 监听运行完成状态，自动跳转
    ref.listen<RunState>(runStateProvider, (prev, next) {
      if (prev?.status != RunStatus.completed && next.status == RunStatus.completed) {
        // 仅首页才自动跳转
        if (_currentIndex == 0) {
          context.push('/complete');
        }
      }
    });

    return Scaffold(
      body: Container(
        color: AppTheme.bgDeep,
        child: Column(
          children: [
            // 状态栏
            StatusBar(
              isRunning: runState.status == RunStatus.running,
              lightOn: _lightOn,
              onLightToggle: () {
                setState(() {
                  _lightOn = !_lightOn;
                });
              },
              ceramicSleeveInstalled: _ceramicSleeveInstalled,
            ),

            // 导航标签栏
            _buildTabBar(),

            // 内容区
            Expanded(
              child: IndexedStack(
                index: _currentIndex,
                children: [
                  _buildDeviceControlPage(runState),
                  const ProgramsPage(),
                  const SettingsPage(),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  /// 导航标签栏
  Widget _buildTabBar() {
    const tabs = [
      (icon: Icons.dashboard, label: '设备控制'),
      (icon: Icons.list_alt, label: '程序管理'),
      (icon: Icons.settings, label: '系统设置'),
    ];

    return Container(
      height: 48,
      padding: const EdgeInsets.symmetric(horizontal: 20),
      child: Row(
        children: List.generate(tabs.length, (index) {
          final tab = tabs[index];
          final isSelected = _currentIndex == index;
          return GestureDetector(
            onTap: () => setState(() => _currentIndex = index),
            child: AnimatedContainer(
              duration: const Duration(milliseconds: 200),
              margin: const EdgeInsets.only(right: 4),
              padding: const EdgeInsets.symmetric(horizontal: 24),
              decoration: BoxDecoration(
                color: isSelected ? AppTheme.accentPrimary : AppTheme.cardBg,
                borderRadius: const BorderRadius.vertical(top: Radius.circular(8)),
                border: Border.all(
                  color: isSelected
                      ? AppTheme.accentPrimary
                      : AppTheme.borderSubtle,
                  width: 1,
                ),
              ),
              child: Row(
                mainAxisSize: MainAxisSize.min,
                children: [
                  Icon(
                    tab.icon,
                    size: 18,
                    color: isSelected ? Colors.white : AppTheme.textSecondary,
                  ),
                  const SizedBox(width: 8),
                  Text(
                    tab.label,
                    style: TextStyle(
                      color: isSelected ? Colors.white : AppTheme.textSecondary,
                      fontSize: 14,
                      fontWeight: isSelected
                          ? FontWeight.w600
                          : FontWeight.normal,
                    ),
                  ),
                ],
              ),
            ),
          );
        }),
      ),
    );
  }

  /// 设备控制页面内容
  Widget _buildDeviceControlPage(RunState runState) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(20, 0, 20, 20),
      child: Row(
        children: [
          // 左侧：程序列表（运行时锁定）
          Opacity(
            opacity: runState.status == RunStatus.idle ? 1.0 : 0.6,
            child: IgnorePointer(
              ignoring: runState.status != RunStatus.idle,
              child: const ProgramList(),
            ),
          ),
          const SizedBox(width: 20),
          // 右侧：运行控制区域
          Expanded(
            child: Column(
              children: [
                const Expanded(child: RunningControlPanel()),
                if (runState.status != RunStatus.idle) ...[
                  const SizedBox(height: 16),
                  const Expanded(child: RunStatusMonitor()),
                ],
              ],
            ),
          ),
        ],
      ),
    );
  }
}