import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:hadi_hoda_flutter/common_ui/resources/my_assets.dart';
import 'package:hadi_hoda_flutter/common_ui/resources/my_spaces.dart';
import 'package:hadi_hoda_flutter/common_ui/resources/my_text_style.dart';
import 'package:hadi_hoda_flutter/core/status/base_status.dart';
import 'package:hadi_hoda_flutter/core/utils/convert_size.dart';
import 'package:hadi_hoda_flutter/core/utils/my_localization.dart';
import 'package:hadi_hoda_flutter/core/utils/screen_size.dart';
import 'package:hadi_hoda_flutter/core/widgets/error/error_state.dart';
import 'package:hadi_hoda_flutter/core/widgets/images/my_image.dart';
import 'package:hadi_hoda_flutter/features/download/domain/entities/download_entity.dart';
import 'package:hadi_hoda_flutter/features/download/presentation/bloc/download_bloc.dart';
import 'package:hadi_hoda_flutter/features/download/presentation/bloc/download_event.dart';
import 'package:hadi_hoda_flutter/features/download/presentation/bloc/download_state.dart';
import 'package:hadi_hoda_flutter/features/download/presentation/ui/widgets/download_loading_widget.dart';

class DownloadPage extends StatelessWidget {
  const DownloadPage({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        height: context.heightScreen,
        width: context.widthScreen,
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
            colors: [
              Color(0XFF00154C),
              Color(0XFF150532),
            ],
          ),
          image: DecorationImage(
            image: AssetImage(MyAssets.pattern),
            scale: 3,
            repeat: ImageRepeat.repeat,
            colorFilter: ColorFilter.mode(
              Colors.white.withValues(alpha: 0.2),
              BlendMode.srcIn,
            ),
          ),
        ),
        child: BlocBuilder<DownloadBloc, DownloadState>(
            buildWhen: (previous, current) =>
            previous.getFilesStatus != current.getFilesStatus,
            builder: (context, state) {
              if (state.getFilesStatus is BaseError) {
                return Padding(
                  padding: EdgeInsets.symmetric(
                    vertical: MediaQuery.viewPaddingOf(context).bottom + MySpaces.s16,
                    horizontal: 60,
                  ),
                  child: ErrorState(
                    onTap: () => context.read<DownloadBloc>().add(GetImagesEvent()),
                  ),
                );
              } else {
                return Stack(
                  alignment: Alignment.center,
                  children: [
                    _image(),
                    _text(context),
                    _loading(context),
                  ],
                );
              }
            }
        ),
      ),
    );
  }

  Widget _image() {
    return Stack(
      children: [
        MyImage(
          image: MyAssets.hadiHoda,
        ),
        PositionedDirectional(
          start: MySpaces.s10,
          top: MySpaces.s40,
          child: MyImage(
            image: MyAssets.globe,
          ),
        ),
      ],
    );
  }

  Widget _text(BuildContext context) {
    return PositionedDirectional(
      bottom: 130,
      child: Column(
        spacing: MySpaces.s6,
        children: [
          Text(
            context.translate.please_wait,
            style: MYTextStyle.titr0,
          ),
          StreamBuilder<DownloadEntity>(
            initialData: DownloadEntity(),
            stream: context.read<DownloadBloc>().loadingStream,
             builder: (context, snapshot) => Text(
              '${context.translate.downloading_data} (${snapshot.data?.count.toMB ?? 0.0}mb / ${snapshot.data?.total.toMB ?? 0.0}mb)',
               style: MYTextStyle.matn3,
            ),
          ),
        ],
      ),
    );
  }

  Positioned _loading(BuildContext context) {
    return Positioned(
      bottom: MySpaces.s40,
      child: DownloadLoadingWidget(
        loadingStream: context.read<DownloadBloc>().loadingStream,
      ),
    );
  }
}