/*
    Dateiverwaltung - File management in your browser
    Copyright (C) 2017 Ulrich Hilger, http://uhilger.de

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

var cm;
var pfad = '';
var modus = 'kacheln';
var openFileName = '';

function fm_init() {
  $('.codeeditor-space').hide();
  $('.code-editor-container').hide();
  //$('.ost').attr('flex-basis', 0);
  $('#newTextFile').on('click', fm_menu_neue_textdatei);
  $('#newFolder').on('click', fm_get_new_folder);
  $('#editTextFile').on('click', fm_get_file_content);
  $('#saveFile').on('click', fm_menu_datei_speichern);
  $('#saveFileAs').on('click', fm_menu_datei_speichern_unter);
  $('#closeFile').on('click', fm_menu_datei_schliessen);
  $('#m-del').on('click', fm_menu_delete);
  $('#m-test').on('click', fm_menu_test);
  $('#saveModal').on('hidden.bs.modal', function (e) {
    $('#modal_ok').attr('onclick','').unbind('click');
  });
  $('#logout').click(fm_logout);  
  fm_get_login();
  fm_get_list('');
  fm_init_uploader();
}

/* ----- Uploader Anfang ----------*/

var dateien = new Array();

function fm_init_uploader() {
  var dropzone = document.getElementById("dateien");  
  dropzone.ondragover = dropzone.ondragenter = function(event) {  
    event.stopPropagation();  
    event.preventDefault();  
  };

  dropzone.ondrop = function(event) {  
    event.stopPropagation();  
    event.preventDefault();  
    var fileList = event.dataTransfer.files;  
    for (var i=0; i<fileList.length; i++) {  
      dateien.push(fileList[i]);
    }
    sendFile(dateien.pop());
  };
}

function sendFile(datei) {
  var uri = "../api/upload";
  var xhr = new XMLHttpRequest();  
  var fd = new FormData();  
  xhr.open("POST", uri, true);  
  xhr.onreadystatechange = function() {  
    if (xhr.readyState == 4 && xhr.status == 200) {  
      fm_get_list(pfad);
      if(dateien.length > 0) {
        sendFile(dateien.pop());
      }
    }  
  };  
  fd.append('dateiauswahlfeld', datei);  
  xhr.send(fd);          
}

/* ----- Uploader Ende --------------- */

function fm_menu_delete() {
  $('#confirmOk').click(function() {
    // hier loeschen
    fm_del_files();
  });
  $('.modal-title').text("Löschen");
  $('.modal-body').text("Wirklich löschen?");
  
  /*var fname = $('.datei-gewaehlt').text();
  if(fname !== undefined) {
    $('#dateiname').val(fname);
  } else {
    $('#dateiname').val('');
  }*/
  //$('#dateiname').attr('placeholder', 'Dateiname');
  $('#confirmModal').modal({
    keyboard: false,
    show: true
  });
}

function fm_menu_test() {
  var w = $('.ost').width();
  if(w == 0) {
    $('.ost').width('20%');
    $('.ost').text('Hallo Welt!');
  } else {
    $('.ost').empty();
    $('.ost').width(0);
  }
}

function fm_ansicht_umschalten() {
  if($('#ansicht').children(0).hasClass('fa-th-list')) {
    $('#ansicht').children(0).addClass('fa-th-large');
    $('#ansicht').children(0).removeClass('fa-th-list');
    modus = 'liste';
  } else {
    $('#ansicht').children(0).addClass('fa-th-list');    
    $('#ansicht').children(0).removeClass('fa-th-large');
    modus = 'kacheln';
  }
  fm_get_list(pfad);
}

function fm_set_modus() {
  if(modus == 'kacheln') {
    $('#ansicht').children(0).addClass('fa-th-list');    
    $('#ansicht').children(0).removeClass('fa-th-large');  
  } else {
    $('#ansicht').children(0).addClass('fa-th-large');
    $('#ansicht').children(0).removeClass('fa-th-list');    
  }
}

function fm_menu_neue_textdatei() {
  fm_text_edit('Neue Datei');
}

function fm_menu_datei_schliessen() {
  $('.codeeditor-space').hide();
  $('.code-editor-container').hide();
  cm.toTextArea();
  $('#bcnav').show();
  $('#dateien').show();
  openFileName = '';
  fm_get_list(pfad);
}

function fm_dateiwahl(ev) {
  var elem = this;
  //console.log('dateiwahl nach click, event shift: ' + ev.shiftKey + ", event ctrl: " + ev.ctrlKey);
  if(modus == 'kacheln') {
    if($(elem).children(0).hasClass('fa-folder')) {
      var ordner = $(elem).text().trim();
      if(pfad.length > 0) {
        pfad = pfad + '/' + ordner;
      } else {
        pfad = ordner;
      }
      fm_get_list(pfad);
    } else if($(elem).children(0).hasClass('fa-file')) {
      if(/*ev.shiftKey || */ ev.ctrlKey) {
        // mehrere Dateien sollen gewaehlt werden
      } else {
        $('.datei-gewaehlt').removeClass('datei-gewaehlt');        
      }
      $(elem).children(0).addClass('datei-gewaehlt');
    } else {
      //console.log('kein folder oder file...');
    }
  } else {
    if($(elem).find('.datei-elem').children(0).hasClass('fa-file-o')) {
      if(/*ev.shiftKey || */ ev.ctrlKey) {
        // mehrere Dateien sollen gewaehlt werden
      } else {
        $('.table-info').removeClass('table-info');
      }
      $(elem).addClass('table-info');
      $('.datei-gewaehlt').removeClass('datei-gewaehlt');
      $(elem).find('.dateiname').addClass('datei-gewaehlt');
    } else {
      var ordner = $(elem).find('.dateiname').text();
      if(pfad.length > 0) {
        pfad = pfad + '/' + ordner;
      } else {
        pfad = ordner;
      }
      fm_get_list(pfad);
    }   
  }
}

function fm_bc_click() {
  var elem = this;
  var bcPfad = $(elem).attr('rpath');
  if(bcPfad !== undefined) {
    pfad = bcPfad;
    fm_get_list(bcPfad);
  } else {
    pfad = '';
    fm_get_list('');
  }
}

function fm_text_edit(content) {
  $('#bcnav').hide();
  $('#dateien').hide();
  $('.codeeditor-space').show();
  $('.code-editor-container').show();
  fm_code_edit(content);  
}

/* ----- API Calls ------------- */

function fm_get_login() {
  var m = '?c=de.uhilger.filecms.pub.SessionManager&m=getSessionUser';
  var u = '../pub' + m;
  fm_get(u, "text", function(resp) {
    $('#userMenu').text(resp);
  });  
}

function fm_get_new_folder() {
  $('#modal_ok').click(function() {
    // hier speichern
    var m = '?c=de.uhilger.filecms.api.FileMgr&m=newFolder&p=' + pfad + '&p=' + $('#dateiname').val();
    var u = '../svc' + m;
    fm_get(u, "json", function(resp) {
      fm_get_list(pfad);
    });
  });
  $('.modal-title').text('Neuer Ordner');
  $('#dialogfrage').text("Name?");
  $('#dateiname').val('');
  $('#dateiname').attr('placeholder', 'Ordnername');
  $('#saveModal').modal({
    keyboard: false,
    show: true
  });
}

function fm_get_file_content() {
  var gewaehlte = $('.datei-gewaehlt');
  var fname = $(gewaehlte[1]).text();
  openFileName = fname;
  var m = '?c=de.uhilger.filecms.api.FileMgr&m=getCode&p=' + pfad + '&p=' + fname;
  var u = '../svc' + m;
  fm_get(u, "text", function(resp) {
    fm_text_edit(resp);
  });
  
}

function fm_del_files() {
  var gewaehlte = $('.datei-gewaehlt');
  //console.log('anzahl: ' + gewaehlte.length);
  var fnames = new Array();
  var i = 1;
  while(i < gewaehlte.length) {
    var str = { "java.lang.String": $(gewaehlte[i]).text()};
    fnames.push(str);
    //console.log('loeschen ' + pfad + ' ' + $(gewaehlte[i]).text());
    i += 2;
  }
  
  var liste = '{"List":' + JSON.stringify(fnames) + '}';
  // 'liste' enthaelt:
  // {"List":[{"java.lang.String":"test3.txt"},{"java.lang.String":"Test1.txt"},{"java.lang.String":"Test2.txt"}]}
  // und wird auf dem Server zu einer List[ArrayList<String>]  
  
  var m = '?c=de.uhilger.filecms.api.FileMgr&m=deleteFiles&p=' + pfad + '&p=' + encodeURIComponent(liste);
  var u = '../svc' + m;
  fm_get(u, "text", function(resp) {
    // console.log('deleteFiles gab folgendes zurueck: ' + resp);
    fm_get_list(pfad);
  });
  
}

function fm_render_list(fl) {
  if(modus == 'kacheln') {
    // Kachelansicht
    var template = $('#tpl-kacheln').html();
    Mustache.parse(template);   // optional, speeds up future uses
    $('.datei-zeile').attr('onclick','').unbind('click');
    $('#dateien').empty();
    $('#dateien').html(Mustache.render(template, fl));
    $('.figure').click(fm_dateiwahl);
  } else {
    // Listenansicht
    var template = $('#tpl-liste').html();
    Mustache.parse(template);   // optional, speeds up future uses
    $('.figure').attr('onclick','').unbind('click');
    $('#dateien').empty();
    $('#dateien').html(Mustache.render(template, fl));
    $('.datei-zeile').click(fm_dateiwahl);
  }
}

// http://localhost:8079/file-cms/svc?c=de.uhilger.filecms.api.FileMgr&f=JSONNICE&m=list&p=
function fm_get_list(relPfad) {
  $('#ansicht').attr('onclick','').unbind('click');
  var m = '?c=de.uhilger.filecms.api.FileMgr&m=list&p=' + relPfad;
  var u = '../svc' + m;
  fm_get(u, "json", function(resp) {
    
    if(resp.List[0].FileRef !== undefined) {
      var files = new Array();
      if(resp.List[0].FileRef instanceof Array) {
        for(var i = 0; i < resp.List[0].FileRef.length; i++) {
          files.push(new FileRef(resp.List[0].FileRef[i]));
        }
      } else {
        files.push(new FileRef(resp.List[0].FileRef));
      }
      var fl = new FileList(files);
      fm_render_list(fl);
    } else {
      $('#dateien').empty();
    }
    
    // Breadcrumb-Ansicht
    var template;
    $('.breadcrumb-item').attr('onclick','').unbind('click');
    $('#bcnav').empty();
    var dirList = new Array();
    var rp = '';
    //console.log("'" + relPfad + "'");
    var dirs = relPfad.split('/');
    //console.log(dirs.length);
    dirList.push(new BcrFile(rp, 'Home'));
    if(relPfad.length > 0) {
      for(var i = 0; i < dirs.length - 1; i++) {
        if(rp.length > 0 ) {
          dirList.push(new BcrFile(rp + '/' + dirs[i], dirs[i]));
          rp = rp + '/' + dirs[i];
        } else {
          dirList.push(new BcrFile(dirs[i], dirs[i]));
          rp = dirs[i];
        }
      }
      var bl = new BcrFiles(dirList);

      if(dirList.length > 0) {
        template = $('#tpl-bcr').html();
        Mustache.parse(template);   // optional, speeds up future uses
        $('#bcnav').html(Mustache.render(template, bl));
      }
      
      if(dirs.length > 0) {
        dirList.push(new BcrFile(rp + '/' + dirs[dirs.length-1], dirs[dirs.length-1]));
        template = $('#tpl-bcr2').html();
        Mustache.parse(template);   // optional, speeds up future uses
        $('#bcnav').append(Mustache.render(template, dirList[dirList.length-1]));        
      } else {
        template = $('#tpl-bcr2').html();
        Mustache.parse(template);   // optional, speeds up future uses
        $('#bcnav').append(Mustache.render(template, dirList[0]));        
      }
      
      $('#bcnav').append($('#tpl-bcr3').html());
    } else {
      pfad = '';
      template = $('#tpl-bcr2').html();
      Mustache.parse(template);   // optional, speeds up future uses
      $('#bcnav').append(Mustache.render(template, dirList[0]));   
      $('#bcnav').append($('#tpl-bcr3').html());
    }
    $('.breadcrumb-item').click(fm_bc_click);
    $('#ansicht').click(fm_ansicht_umschalten);
    fm_set_modus();
  });  
}

function fm_menu_datei_speichern() {
  //var fname = $('.datei-gewaehlt').text();
  var fname = openFileName;
  if(fname !== undefined && fname !== '') {
    fm_save_file(fname);
  } else {
    fm_menu_datei_speichern_unter();
  }
}

function fm_save_file(saveFileName) {
  var m = '?c=de.uhilger.filecms.api.FileMgr&m=saveTextFile';
  var u = '../svc' + m;
  fm_post(u, {p1: pfad, p2: saveFileName, p3: cm.getValue()}, function(resp) {
    openFileName = saveFileName;
  });
}

function fm_menu_datei_speichern_unter() {
  
  $('#modal_ok').click(function() {
    // hier speichern
    fm_save_file($('#dateiname').val());
    /*
    var m = '?c=de.uhilger.filecms.api.FileMgr&m=saveTextFile';
    var u = '../svc' + m;
    fm_post(u, {p1: pfad, p2: $('#dateiname').val(), p3: cm.getValue()}, function(resp) {

    });
    */
  });
  $('.modal-title').text('Datei speichern');
  $('#dialogfrage').text("Dateiname?");
  
  var fname = $('.datei-gewaehlt').text();
  if(fname !== undefined) {
    $('#dateiname').val(fname);
  } else {
    $('#dateiname').val('');
  }
  $('#dateiname').attr('placeholder', 'Dateiname');
  $('#saveModal').modal({
    keyboard: false,
    show: true
  });
}

function fm_logout() {
  var m = '?c=de.uhilger.filecms.pub.SessionManager&m=expireSession';
  var u = '../pub' + m;
  
  fm_get(u, "text", function(resp) {
    $('#userMenu').text('nicht angemeldet');
    window.location.href = '../logout.html';
  });
}


/* ---- codemirror editor handling -------- */

function fm_code_edit(content) {
  cm = CodeMirror.fromTextArea(document.getElementById("editspace"), {
    lineNumbers: true,
    mode: "xml",
    viewportMargin : Infinity,
    extraKeys: {
        "F9": function(cm) {
        cm.setOption("fullScreen", !cm.getOption("fullScreen"));
      },
        "Esc": function(cm) {
        if (cm.getOption("fullScreen")) cm.setOption("fullScreen", false);
      }
    }
  });
  cm.setValue(content);
}



/* -------- helper functions ----------- */

function fm_get(u, dtype, scallback) {
  $.ajax({
    url: u,
    type: "GET",
    dataType: dtype,
    success: scallback,
    error: function (xhr, status, errorThrown) {
      alert("Error: " + errorThrown + " Status: " + status + " URL: " + u);
    },
    complete: function (xhr, status) {
      //console.log( "The request is complete!" );
    }

  });
}

function fm_post(u, d, scallback) {
  $.ajax({
    url: u,
    data: d,
    type: "POST",
    dataType: "json",
    success: scallback,
    error: function (xhr, status, errorThrown) {
      $('#fehler').html("Error: " + errorThrown + " Status: " + status);
    },
    complete: function (xhr, status) {
      //alert( "The request is complete!" );
    }
  });
}

function fm_serialise(obj) {
  return '{"' + obj.constructor.name + '":' + JSON.stringify(obj) + '}';
}

/* ----- Objekte ----- */

function FileList(fl) {
  this.files = fl;
}

function FileRef(obj) {
  var self = this;
  this.fr = obj;
  
  this.typeClass = function() {
    if(modus == 'kacheln') {
      if(self.fr.isDirectory) {
        return 'fa-folder';
      } else {
        return 'fa-file';
      }
    } else {
      if(self.fr.isDirectory) {
        return 'fa-folder';
      } else {
        return 'fa-file-o';
      }
    }
  };
  
  this.fileName = function() {
    var namen = self.fr.absolutePath.split('/');
    if(namen.length > 0) {
      return namen[namen.length - 1];
    } else {
      return self.fr.absolutePath;
    }
  };
}

function BcrFiles(fl) {
  this.files = fl;
}

function BcrFile(rp, n) {
  this.relPath = rp;
  this.fName = n;
}