import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';

import '../../data/api/report_data_source.dart';
import '../../data/content_providers.dart';
import '../../routing/app_routes.dart';
import '../../theme/wise_tokens.dart';
import '../../widgets/institution_card.dart';
import '../../widgets/page_header.dart';
import '../../widgets/states.dart';

class InstitutionsPage extends HookConsumerWidget {
  const InstitutionsPage({required this.dataSource, super.key});

  final ReportDataSource dataSource;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final snapshot = ref.watch(institutionsProvider);
    return snapshot.when(
      loading: () => const LoadingState(),
      error: (error, _) => ErrorState(
        message: error.toString(),
        onRetry: () => ref.invalidate(institutionsProvider),
      ),
      data: (items) {
        final sorted = [...items]
          ..sort((a, b) => b.reportCount.compareTo(a.reportCount));
        if (sorted.isEmpty) {
          return const EmptyState(
            title: '暂无机构信息',
            message: '稍后再试',
            icon: Icons.account_balance_outlined,
          );
        }
        return ListView(
          padding: const EdgeInsets.fromLTRB(
            WiseSpacing.x4,
            4,
            WiseSpacing.x4,
            16,
          ),
          children: [
            const PageHeader(title: '机构', subtitle: '可获取研报的机构'),
            for (final item in sorted) ...[
              InstitutionCard(
                institution: item,
                onTap: () =>
                    openInstitutionDetail(context, dataSource, item.id),
              ),
              const SizedBox(height: WiseSpacing.x3),
            ],
          ],
        );
      },
    );
  }
}