import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import '../../../../core/di/injection.dart';
import '../../../../core/router/app_routes.dart';
import '../../../../core/theme/design_tokens.dart';
import '../../../../shared/widgets/app_button.dart';
import '../../../../shared/widgets/app_loading_indicator.dart';
import '../../../../shared/widgets/app_pressable.dart';
import '../../../../shared/widgets/app_toggle_switch.dart';
import '../../../../shared/widgets/toast/toast.dart';
import '../../../../shared/widgets/toast/toast_type.dart';
import '../../data/models/automation_job_model.dart';
import '../../data/services/automation_jobs_api.dart';
import '../../presentation/cubits/automation_jobs_cubit.dart';
import '../widgets/settings_page_scaffold.dart';

class FeaturesScreen extends StatefulWidget {
  const FeaturesScreen({super.key});

  @override
  State<FeaturesScreen> createState() => _FeaturesScreenState();
}

class _FeaturesScreenState extends State<FeaturesScreen> {
  late final AutomationJobsCubit _cubit;

  @override
  void initState() {
    super.initState();
    _cubit = AutomationJobsCubit(sl<AutomationJobsApi>());
    _cubit.loadJobs();
  }

  @override
  void dispose() {
    _cubit.close();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return BlocProvider.value(
      value: _cubit,
      child: SettingsPageScaffold(
        title: '周期计划',
        onBack: () => context.pop(),
        body: BlocBuilder<AutomationJobsCubit, AutomationJobsState>(
          builder: (context, state) {
            if (state.isLoading) {
              return const Center(child: AppLoadingIndicator());
            }
            if (state.error != null) {
              return Center(child: Text(state.error!));
            }
            return _buildJobList(state);
          },
        ),
      ),
    );
  }

  Widget _buildJobList(AutomationJobsState state) {
    final dailyJobs = state.dailyJobs;
    final weeklyJobs = state.weeklyJobs;

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        _buildSectionTitle('每日'),
        const SizedBox(height: AppSpacing.sm),
        if (dailyJobs.isEmpty)
          _buildEmptyHint('暂无每日计划')
        else
          ...dailyJobs.map(_buildJobCard),
        const SizedBox(height: AppSpacing.lg),
        _buildSectionTitle('每周'),
        const SizedBox(height: AppSpacing.sm),
        if (weeklyJobs.isEmpty)
          _buildEmptyHint('暂无每周计划')
        else
          ...weeklyJobs.map(_buildJobCard),
        if (state.canCreateMore) ...[
          const SizedBox(height: AppSpacing.lg),
          _buildCreateButton(),
        ],
      ],
    );
  }

  Widget _buildEmptyHint(String text) {
    return Container(
      width: double.infinity,
      margin: const EdgeInsets.only(bottom: AppSpacing.sm),
      padding: const EdgeInsets.all(AppSpacing.lg),
      decoration: BoxDecoration(
        color: AppColors.white,
        borderRadius: BorderRadius.circular(AppRadius.lg),
        border: Border.all(color: AppColors.borderSecondary),
      ),
      child: Text(
        text,
        style: const TextStyle(
          color: AppColors.slate500,
          fontSize: 13,
          fontWeight: FontWeight.w500,
        ),
      ),
    );
  }

  Widget _buildSectionTitle(String title) {
    return Text(
      title,
      style: const TextStyle(
        fontSize: 13,
        fontWeight: FontWeight.w600,
        color: AppColors.slate500,
      ),
    );
  }

  Widget _buildJobCard(AutomationJobModel job) {
    return AppPressable(
      onTap: () async {
        await context.push(AppRoutes.settingsJobDetail(job.id));
        if (!mounted) {
          return;
        }
        _cubit.loadJobs();
      },
      borderRadius: BorderRadius.circular(AppRadius.lg),
      child: Container(
        margin: const EdgeInsets.only(bottom: AppSpacing.sm),
        padding: const EdgeInsets.all(AppSpacing.lg),
        decoration: BoxDecoration(
          color: AppColors.white,
          borderRadius: BorderRadius.circular(AppRadius.lg),
          border: Border.all(color: AppColors.borderSecondary),
        ),
        child: Row(
          children: [
            Container(
              width: AppSpacing.xxl + AppSpacing.lg,
              height: AppSpacing.xxl + AppSpacing.lg,
              decoration: BoxDecoration(
                color: AppColors.surfaceTertiary,
                borderRadius: BorderRadius.circular(AppRadius.md),
              ),
              child: const Icon(
                Icons.auto_awesome,
                size: AppSpacing.lg,
                color: AppColors.blue500,
              ),
            ),
            const SizedBox(width: AppSpacing.md),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    job.title,
                    style: const TextStyle(
                      fontSize: 15,
                      fontWeight: FontWeight.w600,
                    ),
                  ),
                  const SizedBox(height: AppSpacing.xs),
                  Text(
                    _buildSubtitle(job),
                    style: const TextStyle(
                      fontSize: 12,
                      color: AppColors.slate500,
                    ),
                  ),
                ],
              ),
            ),
            const SizedBox(width: AppSpacing.sm),
            AppToggleSwitch(
              value: job.isActive,
              onChanged: (next) {
                if (job.isSystem) {
                  Toast.show(context, '系统预置任务状态不可修改', type: ToastType.info);
                  return;
                }
                _cubit.updateJobStatus(id: job.id, enabled: next);
              },
            ),
          ],
        ),
      ),
    );
  }

  String _buildSubtitle(AutomationJobModel job) {
    final statusText = job.isActive ? '已启用' : '未启用';
    final sourceText = job.isSystem ? '系统预置' : '自定义';
    return '$sourceText • $statusText';
  }

  Widget _buildCreateButton() {
    return AppButton(
      text: '创建任务',
      onPressed: () async {
        await context.push(AppRoutes.settingsJobNew);
        if (!mounted) {
          return;
        }
        _cubit.loadJobs();
      },
    );
  }
}