tm_app/lib/views/detail/pages/detail_mobile_page.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:tm_app/core/constants/strings.dart';
import 'package:tm_app/core/theme/colors.dart';
import 'package:tm_app/core/utils/size_config.dart';
import 'package:tm_app/view_models/tender_detail_view_model.dart';
import 'package:tm_app/views/detail/widgets/tender_detail_action.dart';
import 'package:tm_app/views/detail/widgets/tender_detail_card.dart';
import 'package:tm_app/views/detail/widgets/tender_detail_header.dart';
import 'package:tm_app/views/shared/tender_app_bar.dart';

class TenderDetailMobilePage extends StatefulWidget {
  final String tenderId;
  const TenderDetailMobilePage({required this.tenderId, super.key});

  @override
  State<TenderDetailMobilePage> createState() => _TenderDetailMobilePageState();
}

class _TenderDetailMobilePageState extends State<TenderDetailMobilePage> {
  late final TenderDetailViewModel viewModel;
  @override
  void initState() {
    viewModel = context.read<TenderDetailViewModel>();
    viewModel.addListener(_viewModelListener);
    super.initState();
  }

  void _viewModelListener() {
    if (viewModel.status.isNotEmpty &&
        viewModel.status == 'submitted' &&
        viewModel.approvalStatus == true) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(AppStrings.tenderSubmittedSuccessfully)),
      );
    }
    if (viewModel.status.isNotEmpty &&
        viewModel.status == 'unsubmitted' &&
        viewModel.approvalStatus == true) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(AppStrings.tenderUnsubmittedSuccessfully)),
      );
    }
    if (viewModel.status.isNotEmpty &&
        viewModel.status == 'rejected' &&
        viewModel.approvalStatus == true) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(AppStrings.tenderRejectedSuccessfully)),
      );
    }
    if (viewModel.status.isNotEmpty &&
        viewModel.status == 'unrejected' &&
        viewModel.approvalStatus == true) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(AppStrings.tenderUnrejectedSuccessfully)),
      );
    }
    if (viewModel.approvalStatus != false && viewModel.errorMessage != null) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          backgroundColor: AppColors.errorColor,
          content: Text(viewModel.errorMessage!),
        ),
      );
    }
  }

  @override
  void dispose() {
    viewModel.removeListener(_viewModelListener);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
      onPopInvokedWithResult: (didPop, result) {
        if (kIsWeb) {
          WidgetsBinding.instance.addPostFrameCallback((_) {
            context.read<TenderDetailViewModel>().updateTenderApprovals(
              widget.tenderId,
            );
          });
        }
      },
      child: Scaffold(
        backgroundColor: AppColors.backgroundColor,
        appBar: appBar(context: context, title: AppStrings.tenderDetailTitle),
        body: Consumer<TenderDetailViewModel>(
          builder: (context, tenderViewModel, child) {
            if (tenderViewModel.isLoading) {
              return const Center(
                child: CircularProgressIndicator(color: AppColors.secondary50),
              );
            }

            if (tenderViewModel.errorMessage != null) {
              return Center(child: Text(tenderViewModel.errorMessage!));
            }

            final detail = tenderViewModel.tenderDetail;
            if (detail == null) {
              return const Center(child: Text(AppStrings.tenderNoData));
            }

            return SingleChildScrollView(
              child: Padding(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    TenderDetailHeader(isScreenBig: false, detail: detail),
                    SizedBox(height: 24.0.h()),
                    TenderDetailCard(detail: detail),
                    SizedBox(height: 24.0.h()),
                    TenderDetailActions(isScreenBig: false, detail: detail),
                  ],
                ),
              ),
            );
          },
        ),
      ),
    );
  }
}