angular.module('codexApp')
.service('FileService', [ '$rootScope', '$http', 'ThumbnailService',  function($rootScope, $http, ThumbnailService) {

  var notes_dir = "/Users/james/dev/codex/codex";
  var default_notes_dir = "/Users/james/dev/codex/codex/inbox";
  var default_home_note = "/Users/james/dev/codex/codex/index.md"
  var notes = [];
  var current_note = "";
  var note_history = [];
  var note_history_index = 0;

  var prettySize = function(bytes) {
    if (bytes <= 1024) {
      return bytes + " KB"
    } else {
      var megabytes = parseFloat(Math.round(bytes/1024 * 100) / 100).toFixed(0);
      return megabytes + " MB"
    }
  }

  var getFilePathExtension = function(path) {
    var filename = path.split('\\').pop().split('/').pop();
    var lastIndex = filename.lastIndexOf(".");
    if (lastIndex < 1) return "";
    return filename.substr(lastIndex + 1);
  }

  var getFileType = function(path) {
    var extension = getFilePathExtension(path);
    switch (extension) {
      case "pdf":
        return "Document";
      case "jpg":
        return "Image";
      case "png":
        return "Image";
      case "md":
        return "Markdown";
      default:
        return "File";
    }
  }

  var directorySize = function(dir) {
    var filesystem = require("fs");
    var size = 0;
    var results = [];
    filesystem.readdirSync(dir).forEach(function(file) {
        file_path = dir+'/'+file;
        var stat = filesystem.statSync(file_path);
        if (stat && stat.isDirectory()) {
            results = results.concat(directorySize(file_path))
        } else {
          if(file != ".DS_Store") {
            size = size + stat["size"];
            //console.log("* " + stat["size"] + " KB -> " + file_path)
          }
        }
    });
    return size;
  }

  var noteCount = function(){
    var count = $scope.notes.length
    switch (count) {
      case 0:
        return '0 notes';
      case 1:
        return '1 note';
      default:
        return count + ' notes';
    }
  }

  var getThumbnail = function(file_path) {
    var type = getFileType(file_path);
    switch (type) {
      case "Markdown":
        return ThumbnailService.createNoteThumbnail(file_path);
      default:
        return "";
    }
  }

  var isValidFile = function(file) {
    if(file != ".DS_Store" && file != "info.json") {
      var parts = file.split('.');
      if (parts[parts.length -2] == "thumb") {
        return false;
      } else {
        return true
      }
    }
  }

  var SetFileInfo = function(jsonData, dir, file_path, stat) {
    //console.log(jsonData.title);
    if (typeof(jsonData)==='undefined') jsonData = {};
    if(jsonData.title != "" && jsonData.title != undefined){
      var title = jsonData.title;
    } else {
      var title = getNameFromPath(file_path);
    }
    if(jsonData.thumbnail != "" && jsonData.thumbnail != undefined){
      var thumbnail_path = jsonData.thumbnail;
    } else {
      var thumbnail_path = getThumbnail(file_path);
    }
    var file_obj = {
      title: title,
      path: file_path,
      size: prettySize(directorySize(dir)),
      type: getFileType(file_path),
      author: jsonData.author,
      index: jsonData.index,
      id: jsonData.id,
      created_at: dateFormat(stat["birthdate"], "mediumDate"),
      modified_at: dateFormat(stat["mtime"], "mediumDate"),
      accessed_at: dateFormat(stat["atime"], "mediumDate"),
      thumbnail: thumbnail_path
    }
    return file_obj;
  }

  var getNotesFromFolders = function(dir) {
    if (typeof(dir)==='undefined') dir = notes_dir;
    var filesystem = require("fs");
    filesystem.readdirSync(dir).forEach(function(file) {

        file_path = dir+'/'+file;
        var stat = filesystem.statSync(file_path);
        if (stat && stat.isDirectory()) {
            notes = notes.concat(getNotesFromFolders(file_path))
        } else {
          if(file == "info.json"){
            filesystem.readFile(file_path, function(err, data) {
              var jsonData = JSON.parse(data);
              var file_obj = SetFileInfo(jsonData, dir, file_path, stat)
              notes.push(file_obj);
            });
          }
        }
    });
    return notes;
  };

  this.getNotesFromFolders = getNotesFromFolders;

  var getAllFilesFromFolder = function(dir) {
    if (typeof(dir)==='undefined') dir = notes_dir;
    var filesystem = require("fs");
    var results = [];
    filesystem.readdirSync(dir).forEach(function(file) {

        file_path = dir+'/'+file;
        var stat = filesystem.statSync(file_path);
        if (stat && stat.isDirectory()) {
            results = results.concat(getAllFilesFromFolder(file_path))
        } else {
          if(isValidFile(file)) {
            var jsonData = {};
            var file_obj = SetFileInfo(jsonData, dir, file_path, stat)
            results.push(file_obj);
          }
        }

        //console.log(file_obj);
    });
    $rootScope.$broadcast('file-service:files-loaded');
    return results;
  };

  var findNoteInFolder = function(note_id, dir) {
    if (typeof(dir)==='undefined') dir = notes_dir;
    var filesystem = require("fs");
    var results = [];
    filesystem.readdirSync(dir).forEach(function(file) {
        file_path = dir+'/'+file;
        var stat = filesystem.statSync(file_path);
        if (stat && stat.isDirectory()) {
            results = results.concat(findNoteInFolder(note_id, file_path))
        } else {
          if(file == "info.json"){
            filesystem.readFile(file_path, function(err, data) {
              var jsonData = JSON.parse(data);
              console.log(jsonData.id)
              if(jsonData.id == note_id){
                var file_obj = SetFileInfo(jsonData, dir, file_path, stat)
                results.push(file_obj);
              }
            });
          }
        }
    });
    console.log(results);
    return results[0];
  };

  this.saveFile = function(file_path, content){
    var fs = require('fs');
    fs.writeFile(file_path, content, 'utf-8', function(err) {
        if(err) {
            return console.log(err);
        }

        console.log("-> FILE SAVED: " + file_path);
    });
  }

  var getNote = function(file_path){
    var filesystem = require("fs");
    var stat = filesystem.statSync(file_path);
    var file_obj = {
      title: "",
      path: file_path,
      size: stat['size'],
      type: getFileType(file_path),
      author: "",
      index: "",
      id: "",
      created_at: dateFormat(stat["birthdate"], "mediumDate"),
      modified_at: dateFormat(stat["mtime"], "mediumDate"),
      accessed_at: dateFormat(stat["atime"], "mediumDate")
    }
    return file_obj
  }

  var getNameFromPath = function(path) {
    path = path.split('/');
    var filename = path[path.length - 1];
    //filename = filename.split('.');
    //filename.pop();
    //name = filename[filename.length -1];
    return filename
  }

  var getUrlParts = function(url) {
      var a = document.createElement('a');
      a.href = url;

      return {
          href: a.href,
          host: a.host,
          hostname: a.hostname,
          port: a.port,
          pathname: a.pathname,
          protocol: a.protocol,
          hash: a.hash,
          search: a.search
      };
  }

  var absoluteToRelativeURL = function(current_url, absolute_url) {
    // split urls and create arrays
    var current_path = current_url.split('/');
    var absolute_path = getUrlParts(absolute_url).pathname.split('/');
    // remove the current note's filename from the url and the image filename from the url
    //current_path.pop();
    current_path.shift();
    //absolute_path.shift();
    // count how many folders the current path has
    var current_path_count = 0;
    for (var i = 0; i < current_path.length; i++) {
      current_path_count = current_path_count + 1;
    }
    // count how many folders the absolute path has
    var absolute_path_count = 0;
    for (var i = 0; i < absolute_path.length; i++) {
      absolute_path_count = absolute_path_count + 1;
    }
    absolute_path_count = absolute_path_count - 3;
    //dif = current_path_count - (absolute_path_count -1);
    for (var i = 0; i < absolute_path_count; i++) {
      absolute_path.shift();
    }
    // make the relative path a string again
    var relative_path = absolute_path.join('/');
    console.log("* Converted relative URL: " + relative_path)
    return relative_path;
  }

  // Absolute to relative URL
  this.absoluteToRelativeURL = function(current_url, absolute_url) {
    return absoluteToRelativeURL(current_url, absolute_url);
  }

  // Sort files
  var date_sort_asc = function (date1, date2) {
    // This is a comparison function that will result in dates being sorted in
    // ASCENDING order. As you can see, JavaScript's native comparison operators
    // can be used to compare dates. This was news to me.
    if (date1.modified_at > date2.modified_at) return 1;
    if (date1.modified_at < date2.modified_at) return -1;
    return 0;
  };

  var date_sort_desc = function (date1, date2) {
    // This is a comparison function that will result in dates being sorted in
    // DESCENDING order.
    if (date1.modified_at > date2.modified_at) return -1;
    if (date1.modified_at < date2.modified_at) return 1;
    return 0;
  };

  var filterNotes = function(files) {
    var filtered = [];
    for (var i = 0; i < files.length; i++) {
      if(files[i].type == "Markdown") {
        filtered.push(files[i]);
      }
    }
    return filtered;
  }



  // RESPONSE
  this.getAllFiles = function() {
    notes = getAllFilesFromFolder();
    return notes.sort(date_sort_asc);
  }

  this.getAllNotes = function() {
    notes = getAllFilesFromFolder();
    notes = filterNotes(notes);
    return notes.sort(date_sort_asc);
  }

  this.getNote = function(path) {
    return getNote(path);
  }

  this.getCurrentNote = function() {
    return current_note;
  }

  this.setCurrentNote = function(note) {
    //console.log("searcing for: " + note_id)
    current_note = note;
    if((note_history.length -1) != note_history_index){
      var dif = note_history.length - note_history_index - 1;
      for (var i = 0; i < dif; i++) {
        note_history.pop();
      }
    }

    note_history.push(current_note);
    note_history_index = note_history.length -1;

    //console.log(current_note);
    //console.log("Current_note: " + current_note.title)
  }

  this.goToPreviousNote = function(){
    if(note_history_index > 0) {
      note_history_index = note_history_index - 1;
      current_note = note_history[note_history_index];
    }
  }

  this.goToNextNote = function(){
    if(note_history_index < (note_history.length - 1)){
      note_history_index = note_history_index + 1;
      current_note = note_history[note_history_index];
    }
  }

  this.getNotesDir = function() {
    return notes_dir;
  }

  this.getDefaultNotesDir = function() {
    return default_notes_dir;
  }

  this.getDefaultNote = function() {
    return getNote(default_home_note);
  }

}])