import 'dart:io' as io;

//import 'package:advance_pdf_viewer/advance_pdf_viewer.dart';
import 'package:decpisos/funcoes_gerais.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:path_provider/path_provider.dart';
import 'package:share/share.dart';

class PDFViewerScreenController extends GetxController{
  var loading = true.obs;
  var loadPDF = false.obs;
  var visibleRefresh = false.obs;
  var error = false.obs;
  //PDFDocument doc = PDFDocument();
  io.File? filePDF;

  @override
  void onInit() {
    super.onInit();
    this._loadPDF();
  }

  Future<void> _loadPDF() async {
    var file = await this._createFileOfPdfUrl();
    // if(file != null && await file.exists()){
    //   //io.File fpdf = new io.File('${file.path}');
    //   this.doc = await PDFDocument.fromFile(file);
    //   //this.doc = await PDFDocument.fromFile(file);
    //   //this.visibleRefresh.value = true;
    // } 
    // else{
    //   if(await FuncoesGerais.checkInternetConnection() == false){
    //     this.error.value = true;
    //   }
    //   else{
    //     this.doc = await PDFDocument.fromURL(FuncoesGerais.urlPDF);
    //   }
      
    // }  
    
    if(file == null || await file.exists() == false){
      this.error.value = true;
    }

    this.loading.value = false;
  }

  Future<void> refreshPDF() async {
    this.loading.value = true;
    try {
      await this.filePDF!.delete();
      this._loadPDF();
    } catch (e) {
      Get.rawSnackbar(message: 'Não possível atualizar o PDF. Tente novamente');
      this.loading.value = false;
    }
  }

  Future<void> sharePDF() async {
    //Share.shareFiles(['${directory.path}/image.jpg'], text: 'Great picture');
    this.loadPDF.value = true;
    var file = await this._createFileOfPdfUrl();
    try {
      Share.shareFiles([file!.path], text: 'DecCard').then((value) => this.loadPDF.value = false);      
    } catch (e) {
      this.loadPDF.value = false;
      Get.rawSnackbar(message: 'Não foi possível compartilhar o PDF');
    }
    
  }  

  Future<io.File?> _createFileOfPdfUrl() async {
    final url = FuncoesGerais.urlPDF;
    io.File? file;
    //f.File file2;
    final filename = url.substring(url.lastIndexOf("/") + 1);
    String dir = (await getApplicationDocumentsDirectory()).path;
    file = io.File('$dir/$filename');
    if(!await file.exists()){
      if(await FuncoesGerais.checkInternetConnection()){    
        var request = await io.HttpClient().getUrl(Uri.parse(url));
        var response = await request.close();
        var bytes = await consolidateHttpClientResponseBytes(response);
        await file.writeAsBytes(bytes);
      }
      else{
        file = null;
      }      
    }
    this.filePDF = file;
    if(this.filePDF != null) this.visibleRefresh.value = await this.filePDF!.exists();

    return file;
  }  

  Widget buildError(){
    return Container(
      width: double.maxFinite,
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Text('Não foi possível carregar o PDF'),
          SizedBox(height: 10.0,),
          ElevatedButton(onPressed: this.refreshPDF,child: Text('Atualizar'))
          //RaisedButton(onPressed: this.refreshPDF,child: Text('Atualizar'),)
        ],
      ),
    );
  }
}