cloudsolutions-atoms/lib/views/widgets/equipment/asset_document_history_view.dart

import 'dart:developer';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:test_sa/controllers/api_routes/urls.dart';
import 'package:test_sa/controllers/providers/api/devices_provider.dart';
import 'package:test_sa/extensions/int_extensions.dart';
import 'package:test_sa/extensions/widget_extensions.dart';
import 'package:test_sa/models/generic_attachment_model.dart';
import 'package:test_sa/views/widgets/images/files_list.dart';
import 'package:test_sa/views/widgets/item_views/info_text_widget.dart';
import 'package:test_sa/views/widgets/loaders/app_loading.dart';
import 'package:test_sa/views/widgets/loaders/no_data_found.dart';

class AssetDocumentHistoryView extends StatefulWidget {
  final int assetId;

  const AssetDocumentHistoryView({
    Key? key,
    required this.assetId,
  }) : super(key: key);

  @override
  State<AssetDocumentHistoryView> createState() => _AssetDocumentHistoryViewState();
}

class _AssetDocumentHistoryViewState extends State<AssetDocumentHistoryView> {
  late AssetProvider _assetProvider;
  final ScrollController _scrollController = ScrollController();
  List<GenericAttachmentModel> _documents = [];
  bool _isLoading = false;
  int _currentPage = 1;
  int _totalRows = 0;

  @override
  void initState() {
    super.initState();
    _assetProvider = context.read<AssetProvider>();
    _scrollController.addListener(_onScroll);
    _loadDocuments();
  }

  @override
  void dispose() {
    _scrollController.dispose();
    super.dispose();
  }

  void _onScroll() {
    final pixels = _scrollController.position.pixels;
    final maxScroll = _scrollController.position.maxScrollExtent;
    if (pixels >= maxScroll * 0.8) {
      if (!_isLoading && _hasMore) {
        _loadMore();
      }
    }
  }

  bool get _hasMore => _documents.length < _totalRows;

  Future<void> _loadDocuments({bool refresh = false, bool loadMore = false}) async {
    if (_isLoading) return;
    setState(() {
      _isLoading = true;
      if (refresh) {
        _documents.clear();
        _currentPage = 1;
      }
      if (loadMore) {
        _currentPage++;
      }
    });
    try {
      final result = await _assetProvider.getAssetDocumentHistory(
        assetId: widget.assetId,
        pageNumber: _currentPage,
      );
      if (mounted) {
        setState(() {
          if (refresh) {
            _documents = result.documents;
          } else {
            _documents.addAll(result.documents);
          }
          _totalRows = result.totalRows;
          _isLoading = false;
        });
      }
    } catch (e) {
      log('Error loading documents: $e');
      if (mounted) {
        setState(() {
          _isLoading = false;
        });
      }
    }
  }

  Future<void> _loadMore() async {
    await _loadDocuments(loadMore: true);
  }

  Future<void> _onRefresh() async {
    await _loadDocuments(refresh: true);
  }

  @override
  Widget build(BuildContext context) {
    if (_isLoading && _documents.isEmpty) {
      return const Center(child: ALoading());
    }
    if (_documents.isEmpty && !_isLoading) {
      return const Center(child: NoDataFound());
    }
    return RefreshIndicator(
      onRefresh: _onRefresh,
      child: ListView(
        controller: _scrollController,
        padding: EdgeInsets.symmetric(
          horizontal: 16.toScreenWidth,
        ),
        children: [
          FilesList(
            showAsListView: true,
            showDownloadButton: true,
            itemGap: 12.toScreenHeight,
            images: _documents
                .map((doc) {
                  return URLs.getFileUrl(doc.name) ?? '';
                }).where((url) => url.isNotEmpty).toList(),
            types: _documents.map((doc) {
              final attachmentType = doc.documentType?.name ?? '';
              return attachmentType.isNotEmpty ? attachmentType : 'Asset Guide';
            }).toList(),
          ).toShadowContainer(context),
          if (_isLoading && _documents.isNotEmpty&&_hasMore) ...[
            16.height,
            Center(
              child: Padding(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    const ALoading(),
                    8.height,
                    const InfoTextLabelWidget(label: 'Loading more...'),
                  ],
                ),
              ),
            ),
          ],
        ],
      ),
    );
  }
}