"use strict";
var connection = null;

var WebSocket = WebSocket || MozWebSocket;

// Implement bootstrap 3 style button loading support
(function($) {
  $.fn.button = function(action) {
    if (action === 'loading' && this.data('loading-text')) {
      this.data('original-text', this.html()).html(this.data('loading-text')).prop('disabled', true);
      feather.replace();
    }
    if (action === 'reset' && this.data('original-text')) {
      this.html(this.data('original-text')).prop('disabled', false);
      feather.replace();
    }
  };
}(jQuery));

// HTML escaping
var entityMap = {
  '&': '&',
  '<': '&lt;',
  '>': '&gt;',
  '"': '&quot;',
  "'": '&#x27;',
  '/': '&#x2F;',
  '`': '&#x60;',
  '=': '&#x3D;'
};

function escapeHtml(string) {
  return String(string).replace(/[&<>"'`=\/]/g, function (s) {
    return entityMap[s];
  });
}

function displayStatus(message) {
  $('#status-content').html('<div id="status" class="alert alert-warning alert-dismissable fade show" role="alert"><span>' + escapeHtml(message) + '</span><button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button></div>');
}

// Enable and disable buttons based on connection status
var connectedButtonIds = ['systemRestart', 'networkApproach', 'networkAddress', 'networkMask', 'networkGateway', 'networkDNS', 'visionUp', 'visionDown', 'visionTerm', 'visionKill', 'systemReadOnly', 'systemWritable', 'visionClient', 'visionTeam', 'visionDiscard', 'addCamera', 'applicationType'];
var connectedButtonClasses = ['cameraName', 'cameraPath', 'cameraPixelFormat', 'cameraWidth', 'cameraHeight', 'cameraFps', 'cameraBrightness', 'cameraWhiteBalance', 'cameraExposure', 'cameraProperties', 'cameraRemove']
var writableButtonIds = ['networkSave', 'visionSave', 'applicationSave'];
var systemStatusIds = ['systemMemoryFree1s', 'systemMemoryFree5s',
                       'systemMemoryAvail1s', 'systemMemoryAvail5s',
                       'systemCpuUser1s', 'systemCpuUser5s',
                       'systemCpuSystem1s', 'systemCpuSystem5s',
                       'systemCpuIdle1s', 'systemCpuIdle5s',
                       'systemNetwork1s', 'systemNetwork5s'];

function displayDisconnected() {
  displayReadOnly();
  $('#connectionBadge').removeClass('badge-primary').addClass('badge-secondary').text('Disconnected');
  $('#visionServiceStatus').removeClass('badge-primary').removeClass('badge-secondary').addClass('badge-dark').text('Unknown Status');
  for (var i = 0; i < connectedButtonIds.length; i++) {
    $('#' + connectedButtonIds[i]).prop('disabled', true);
  }
  for (var i = 0; i < connectedButtonClasses.length; i++) {
    $('.' + connectedButtonClasses[i]).prop('disabled', true);
  }
  for (var i = 0; i < systemStatusIds.length; i++) {
    $('#' + systemStatusIds[i]).text("");
  }
}

function displayConnected() {
  $('#connectionBadge').removeClass('badge-secondary').addClass('badge-primary').text('Connected');
  for (var i = 0; i < connectedButtonIds.length; i++) {
    $('#' + connectedButtonIds[i]).prop('disabled', false);
  }
  for (var i = 0; i < connectedButtonClasses.length; i++) {
    $('.' + connectedButtonClasses[i]).prop('disabled', false);
  }
}

// Enable and disable buttons based on writable status
function displayReadOnly() {
  for (var i = 0; i < writableButtonIds.length; i++) {
    $('#' + writableButtonIds[i]).prop('disabled', true);
  }
  $('#systemReadOnly').addClass('active').prop('aria-pressed', true);
  $('#systemWritable').removeClass('active').prop('aria-pressed', false);
}

function displayWritable() {
  for (var i = 0; i < writableButtonIds.length; i++) {
    $('#' + writableButtonIds[i]).prop('disabled', false);
  }
  $('#systemReadOnly').removeClass('active').prop('aria-pressed', false);
  $('#systemWritable').addClass('active').prop('aria-pressed', true);
}

// Handle Read-Only and Writable buttons
$('#systemReadOnly').click(function() {
  var $this = $(this);
  if ($this.hasClass('active')) return;
  var msg = {
    type: 'systemReadOnly'
  };
  connection.send(JSON.stringify(msg));
});

$('#systemWritable').click(function() {
  var $this = $(this);
  if ($this.hasClass('active')) return;
  var msg = {
    type: 'systemWritable'
  };
  connection.send(JSON.stringify(msg));
});

// Vision settings
var visionSettingsServer = {};
var visionSettingsDisplay = {'cameras': []};

// WebSocket automatic reconnection timer
var reconnectTimerId = 0;

// Establish WebSocket connection
function connect() {
  if (connection && connection.readyState !== WebSocket.CLOSED) return;
  var serverUrl = "ws://" + window.location.hostname;
  if (window.location.port !== '') {
    serverUrl += ':' + window.location.port;
  }
  connection = new WebSocket(serverUrl, 'frcvision');
  connection.onopen = function(evt) {
    if (reconnectTimerId) {
      window.clearInterval(reconnectTimerId);
      reconnectTimerId = 0;
    }
    displayConnected();
  };
  connection.onclose = function(evt) {
    displayDisconnected();
    if (!reconnectTimerId) {
      reconnectTimerId = setInterval(function() { connect(); }, 2000);
    }
  };
  // WebSocket incoming message handling
  connection.onmessage = function(evt) {
    var msg = JSON.parse(evt.data);
    if (msg === null) {
      return;
    }
    switch (msg.type) {
      case 'systemStatus':
        for (var i = 0; i < systemStatusIds.length; i++) {
          $('#' + systemStatusIds[i]).text(msg[systemStatusIds[i]]);
        }
        break;
      case 'visionStatus':
        var elem = $('#visionServiceStatus');
        if (msg.visionServiceStatus) {
          elem.text(msg.visionServiceStatus);
        }
        if (msg.visionServiceEnabled && !elem.hasClass('badge-primary')) {
          elem.removeClass('badge-dark').removeClass('badge-secondary').addClass('badge-primary');
        } else if (!msg.visionServiceEnabled && !elem.hasClass('badge-secondary')) {
          elem.removeClass('badge-dark').removeClass('badge-primary').addClass('badge-secondary');
        }
        break;
      case 'visionLog':
        visionLog(msg.data);
        break;
      case 'networkSettings':
        $('#networkApproach').val(msg.networkApproach);
        $('#networkAddress').val(msg.networkAddress);
        $('#networkMask').val(msg.networkMask);
        $('#networkGateway').val(msg.networkGateway);
        $('#networkDNS').val(msg.networkDNS);
        updateNetworkSettingsView();
        break;
      case 'visionSettings':
        visionSettingsServer = msg.settings;
        visionSettingsDisplay = $.extend(true, {}, visionSettingsServer);
        updateVisionSettingsView();
        break;
      case 'applicationSettings':
        $('#applicationType').val(msg.applicationType);
        updateApplicationView();
        break;
      case 'applicationSaveComplete':
        $('#applicationSave').button('reset');
        updateApplicationView();
        break;
      case 'systemReadOnly':
        displayReadOnly();
        break;
      case 'systemWritable':
        displayWritable();
        break;
      case 'status':
        displayStatus(msg.message);
        break;
    }
  };
}

// Button handlers
$('#systemRestart').click(function() {
  var msg = {
    type: 'systemRestart'
  };
  connection.send(JSON.stringify(msg));
});

$('#visionUp').click(function() {
  var msg = {
    type: 'visionUp'
  };
  connection.send(JSON.stringify(msg));
});

$('#visionDown').click(function() {
  var msg = {
    type: 'visionDown'
  };
  connection.send(JSON.stringify(msg));
});

$('#visionTerm').click(function() {
  var msg = {
    type: 'visionTerm'
  };
  connection.send(JSON.stringify(msg));
});

$('#visionKill').click(function() {
  var msg = {
    type: 'visionKill'
  };
  connection.send(JSON.stringify(msg));
});

$('#visionLogEnabled').change(function() {
  var msg = {
    type: 'visionLogEnabled',
    value: this.checked
  };
  connection.send(JSON.stringify(msg));
});

//
// Vision console output
//
var visionConsole = document.getElementById('visionConsole');
var visionLogEnabled = $('#visionLogEnabled');
var _linesLimit = 100;

/*
function escape_for_html(txt) {
  return txt.replace(/[&<>]/gm, function(str) {
    if (str == "&") return "&amp;";
    if (str == "<") return "&lt;";
    if (str == ">") return "&gt;";
  });
}
*/

function visionLog(data) {
  if (!visionLogEnabled.prop('checked')) {
    return;
  }
  var wasScrolledBottom = (visionConsole.scrollTop === (visionConsole.scrollHeight - visionConsole.offsetHeight));
  var div = document.createElement('div');
  var p = document.createElement('p');
  p.className = 'inner-line';

  // escape HTML tags
  data = escapeHtml(data);
  p.innerHTML = data;

  div.className = 'line';
  div.addEventListener('click', function click() {
    if (this.className.indexOf('selected') === -1) {
      this.className = 'line-selected';
    } else {
      this.className = 'line';
    }
  });

  div.appendChild(p);
  visionConsole.appendChild(div);

  if (visionConsole.children.length > _linesLimit) {
    visionConsole.removeChild(visionConsole.children[0]);
  }

  if (wasScrolledBottom) {
    visionConsole.scrollTop = visionConsole.scrollHeight;
  }
}

// Show details when appropriate for network approach
function updateNetworkSettingsView() {
  if ($('#networkApproach').val() === "dhcp") {
    $('#networkIpDetails').collapse('hide');
  } else {
    $('#networkIpDetails').collapse('show');
  }
}

$('#networkApproach').change(function() {
  updateNetworkSettingsView();
});

// Network Save button handler
$('#networkSave').click(function() {
  var msg = {
    type: 'networkSave',
    networkApproach: $('#networkApproach').val(),
    networkAddress: $('#networkAddress').val(),
    networkMask: $('#networkMask').val(),
    networkGateway: $('#networkGateway').val(),
    networkDNS: $('#networkDNS').val()
  };
  connection.send(JSON.stringify(msg));
});

// Show details when appropriate for NT client
$('#visionClient').change(function() {
  if (this.checked) {
    $('#visionClientDetails').collapse('show');
  } else {
    $('#visionClientDetails').collapse('hide');
  }
});

function updateVisionCameraView(camera, value) {
  if ('name' in value) {
    camera.find('.cameraTitle').text('Camera ' + value.name);
    camera.find('.cameraName').val(value.name);
  }
  if ('path' in value) {
    camera.find('.cameraPath').val(value.path);
  }
  camera.find('.cameraPixelFormat').val(value['pixel format']);
  camera.find('.cameraWidth').val(value.width);
  camera.find('.cameraHeight').val(value.height);
  camera.find('.cameraFps').val(value.fps);
  camera.find('.cameraBrightness').val(value.brightness);
  camera.find('.cameraWhiteBalance').val(value['white balance']);
  camera.find('.cameraExposure').val(value.exposure);
  camera.find('.cameraProperties').val(JSON.stringify(value.properties));
}

function appendNewVisionCameraView(value, i) {
  var camera = $('#cameraNEW').clone();
  camera.attr('id', 'camera' + i);
  camera.addClass('cameraSetting');
  camera.removeAttr('style');

  updateVisionCameraView(camera, value);
  camera.find('.cameraStream').attr('href', 'http://' + window.location.hostname + ':' + (1181 + i) + '/');
  camera.find('.cameraRemove').click(function() {
    visionSettingsDisplay.cameras.splice(i, 1);
    camera.remove();
  });
  camera.find('.cameraSettingsFile').change(function() {
    if (this.files.length <= 0) {
      return false;
    }
    var fr = new FileReader();
    fr.onload = function(e) {
      var result = JSON.parse(e.target.result);
      if (!('name' in result)) {
        result.name = visionSettingsDisplay.cameras[i].name;
      }
      if (!('path' in result)) {
        result.path = visionSettingsDisplay.cameras[i].path;
      }
      visionSettingsDisplay.cameras[i] = result;
      updateVisionCameraView(camera, result);
    };
    fr.readAsText(this.files.item(0));
  });

  camera.find('[id]').each(function() {
    $(this).attr('id', $(this).attr('id').replace('NEW', i));
  });
  camera.find('[for]').each(function() {
    $(this).attr('for', $(this).attr('for').replace('NEW', i));
  });
  camera.find('[data-target]').each(function() {
    $(this).attr('data-target', $(this).attr('data-target').replace('NEW', i));
  });

  $('#cameras').append(camera);
}

function updateVisionSettingsView() {
  var isClient = !visionSettingsDisplay.ntmode || visionSettingsDisplay.ntmode === 'client';
  $('#visionClient').prop('checked', isClient);
  if (isClient) {
    $('#visionClientDetails').collapse('show');
  } else {
    $('#visionClientDetails').collapse('hide');
  }
  $('#visionTeam').val(visionSettingsDisplay.team);

  $('.cameraSetting').remove();
  visionSettingsDisplay.cameras.forEach(function (value, i) {
    appendNewVisionCameraView(value, i);
  });
  feather.replace();
}

$('#visionSave').click(function() {
  // update json from view
  visionSettingsDisplay.ntmode = $('#visionClient').prop('checked') ? 'client' : 'server';
  visionSettingsDisplay.team = parseInt($('#visionTeam').val(), 10);
  visionSettingsDisplay.cameras.forEach(function (value, i) {
    var camera = $('#camera' + i);
    value.name = camera.find('.cameraName').val();
    value.path = camera.find('.cameraPath').val();
    value['pixel format'] = camera.find('.cameraPixelFormat').val();
    value.width = parseInt(camera.find('.cameraWidth').val(), 10);
    if (isNaN(value.width)) {
      delete value["width"];
    }
    value.height = parseInt(camera.find('.cameraHeight').val(), 10);
    if (isNaN(value.height)) {
      delete value["height"];
    }
    value.fps = parseInt(camera.find('.cameraFps').val(), 10);
    if (isNaN(value.fps)) {
      delete value["fps"];
    }

    var brightness = camera.find('.cameraBrightness').val();
    if (brightness !== '') {
      value.brightness = parseInt(brightness);
      if (isNaN(value.brightness)) {
        value.brightness = brightness;
      }
    } else {
      delete value['brightness'];
    }

    var whiteBalance = camera.find('.cameraWhiteBalance').val();
    if (whiteBalance !== '') {
      value['white balance'] = parseInt(whiteBalance);
      if (isNaN(value['white balance'])) {
        value['white balance'] = whiteBalance;
      }
    } else {
      delete value['white balance'];
    }

    var exposure = camera.find('.cameraExposure').val();
    if (exposure !== '') {
      value.exposure = parseInt(exposure);
      if (isNaN(value.exposure)) {
        value.exposure = exposure;
      }
    } else {
      delete value['exposure'];
    }

    try {
      value.properties = JSON.parse(camera.find('.cameraProperties').val());
    } catch (err) {
      delete value['properties'];
    }
  });
  var msg = {
    type: 'visionSave',
    settings: visionSettingsDisplay
  };
  connection.send(JSON.stringify(msg));
});

$('#visionDiscard').click(function() {
  visionSettingsDisplay = $.extend(true, {}, visionSettingsServer);
  updateVisionSettingsView();
});

$('#addCamera').click(function() {
  var i = visionSettingsDisplay.cameras.length;
  visionSettingsDisplay.cameras.push({});
  appendNewVisionCameraView({}, i);
});

var applicationFiles = [];

// Show details when appropriate for application type
function updateApplicationView() {
  if ($('#applicationType').val().startsWith("upload")) {
    $('#applicationUpload').collapse('show');
  } else {
    $('#applicationUpload').collapse('hide');
  }
  $('#applicationFile').val(null);
  applicationFiles = [];
}

$('#applicationType').change(function() {
  updateApplicationView();
});

$('#applicationFile').change(function() {
  applicationFiles = this.files;
});

$('#applicationSave').click(function() {
  var msg = {
    type: 'applicationSave',
    applicationType: $('#applicationType').val()
  };
  connection.send(JSON.stringify(msg));

  // upload the file if requested
  if (applicationFiles.length <= 0) {
    return;
  }
  $('#applicationSave').button('loading');
  var fr = new FileReader();
  fr.onload = function(e) {
    connection.send(e.target.result);
  };
  fr.readAsArrayBuffer(applicationFiles.item(0));
});

// Start with display disconnected and start initial connection attempt
displayDisconnected();
updateNetworkSettingsView();
updateVisionSettingsView();
updateApplicationView();
connect();