import $ from 'jquery';
import HTMLOperation from './HTMLOperation';
/* globals Sortable */

/**
 * Waiter to handle events related to the recipe.
 *
 * @author n1474335 [n1474335@gmail.com]
 * @copyright Crown Copyright 2016
 * @license Apache-2.0
 *
 * @constructor
 * @param {HTMLApp} app - The main view object for CyberChef.
 * @param {Manager} manager - The CyberChef event manager.
 */
export default function RecipeWaiter(app, manager) {
  this.app = app;
  this.manager = manager;
  this.remove_intent = false;
}


/**
 * Sets up the drag and drop capability for operations in the operations and recipe areas.
 */
RecipeWaiter.prototype.initialise_operation_drag_n_drop = function () {
  let rec_list = document.getElementById('rec_list'),
    op_lists = document.querySelectorAll('.category .op_list');


    // Recipe list
  Sortable.create(rec_list, {
    group: 'recipe',
    sort: true,
    animation: 0,
    delay: 0,
    filter: '.arg-input,.arg', // Relies on commenting out a line in Sortable.js which calls evt.preventDefault()
    setData(dataTransfer, drag_el) {
      dataTransfer.setData('Text', drag_el.querySelector('.arg-title').textContent);
    },
    onEnd: function (evt) {
      if (this.remove_intent) {
        evt.item.remove();
        evt.target.dispatchEvent(this.manager.operationremove);
      }
    }.bind(this),
  });

  Sortable.utils.on(rec_list, 'dragover', () => {
    this.remove_intent = false;
  });

  Sortable.utils.on(rec_list, 'dragleave', () => {
    this.remove_intent = true;
    this.app.progress = 0;
  });

    // Favourites category
  document.querySelector('#categories a').addEventListener('dragover', this.fav_dragover.bind(this));
  document.querySelector('#categories a').addEventListener('dragleave', this.fav_dragleave.bind(this));
  document.querySelector('#categories a').addEventListener('drop', this.fav_drop.bind(this));
};


/**
 * Creates a drag-n-droppable seed list of operations.
 *
 * @param {element} list_el - The list the initialise
 */
RecipeWaiter.prototype.create_sortable_seed_list = function (list_el) {
  Sortable.create(list_el, {
    group: {
      name: 'recipe',
      pull: 'clone',
      put: false,
    },
    sort: false,
    setData(dataTransfer, drag_el) {
      dataTransfer.setData('Text', drag_el.textContent);
    },
    onStart(evt) {
      $(evt.item).popover('destroy');
      evt.item.setAttribute('data-toggle', 'popover-disabled');
    },
    onEnd: this.op_sort_end.bind(this),
  });
};


/**
 * Handler for operation sort end events.
 * Removes the operation from the list if it has been dropped outside. If not, adds it to the list
 * at the appropriate place and initialises it.
 *
 * @fires Manager#operationadd
 * @param {event} evt
 */
RecipeWaiter.prototype.op_sort_end = function (evt) {
  if (this.remove_intent) {
    if (evt.item.parentNode.id == 'rec_list') {
      evt.item.remove();
    }
    return;
  }

    // Reinitialise the popover on the original element in the ops list because for some reason it
    // gets destroyed and recreated.
  $(evt.clone).popover();
  $(evt.clone).children('[data-toggle=popover]').popover();

  if (evt.item.parentNode.id !== 'rec_list') {
    return;
  }

  this.build_recipe_operation(evt.item);
  evt.item.dispatchEvent(this.manager.operationadd);
};


/**
 * Handler for favourite dragover events.
 * If the element being dragged is an operation, displays a visual cue so that the user knows it can
 * be dropped here.
 *
 * @param {event} e
 */
RecipeWaiter.prototype.fav_dragover = function (e) {
  if (e.dataTransfer.effectAllowed !== 'move') {
    return false;
  }

  e.stopPropagation();
  e.preventDefault();
  if (e.target.className && e.target.className.indexOf('category-title') > -1) {
        // Hovering over the a
    e.target.classList.add('favourites-hover');
  } else if (e.target.parentNode.className && e.target.parentNode.className.indexOf('category-title') > -1) {
        // Hovering over the Edit button
    e.target.parentNode.classList.add('favourites-hover');
  } else if (e.target.parentNode.parentNode.className && e.target.parentNode.parentNode.className.indexOf('category-title') > -1) {
        // Hovering over the image on the Edit button
    e.target.parentNode.parentNode.classList.add('favourites-hover');
  }
};


/**
 * Handler for favourite dragleave events.
 * Removes the visual cue.
 *
 * @param {event} e
 */
RecipeWaiter.prototype.fav_dragleave = function (e) {
  e.stopPropagation();
  e.preventDefault();
  document.querySelector('#categories a').classList.remove('favourites-hover');
};


/**
 * Handler for favourite drop events.
 * Adds the dragged operation to the favourites list.
 *
 * @param {event} e
 */
RecipeWaiter.prototype.fav_drop = function (e) {
  e.stopPropagation();
  e.preventDefault();
  e.target.classList.remove('favourites-hover');

  const op_name = e.dataTransfer.getData('Text');
  this.app.add_favourite(op_name);
};


/**
 * Handler for ingredient change events.
 *
 * @fires Manager#statechange
 */
RecipeWaiter.prototype.ing_change = function () {
  window.dispatchEvent(this.manager.statechange);
};


/**
 * Handler for disable click events.
 * Updates the icon status.
 *
 * @fires Manager#statechange
 * @param {event} e
 */
RecipeWaiter.prototype.disable_click = function (e) {
  const icon = e.target;

  if (icon.getAttribute('disabled') == 'false') {
    icon.setAttribute('disabled', 'true');
    icon.classList.add('disable-icon-selected');
    icon.parentNode.parentNode.classList.add('disabled');
  } else {
    icon.setAttribute('disabled', 'false');
    icon.classList.remove('disable-icon-selected');
    icon.parentNode.parentNode.classList.remove('disabled');
  }

  this.app.progress = 0;
  window.dispatchEvent(this.manager.statechange);
};


/**
 * Handler for breakpoint click events.
 * Updates the icon status.
 *
 * @fires Manager#statechange
 * @param {event} e
 */
RecipeWaiter.prototype.breakpoint_click = function (e) {
  const bp = e.target;

  if (bp.getAttribute('break') == 'false') {
    bp.setAttribute('break', 'true');
    bp.classList.add('breakpoint-selected');
  } else {
    bp.setAttribute('break', 'false');
    bp.classList.remove('breakpoint-selected');
  }

  window.dispatchEvent(this.manager.statechange);
};


/**
 * Handler for operation doubleclick events.
 * Removes the operation from the recipe and auto bakes.
 *
 * @fires Manager#statechange
 * @param {event} e
 */
RecipeWaiter.prototype.operation_dblclick = function (e) {
  e.target.remove();
  window.dispatchEvent(this.manager.statechange);
};


/**
 * Handler for operation child doubleclick events.
 * Removes the operation from the recipe.
 *
 * @fires Manager#statechange
 * @param {event} e
 */
RecipeWaiter.prototype.operation_child_dblclick = function (e) {
  e.target.parentNode.remove();
  window.dispatchEvent(this.manager.statechange);
};


/**
 * Generates a configuration object to represent the current recipe.
 *
 * @returns {recipe_config}
 */
RecipeWaiter.prototype.get_config = function () {
  let config = [],
    ingredients,
    ing_list,
    disabled,
    bp,
    item,
    operations = document.querySelectorAll('#rec_list li.operation');

  for (let i = 0; i < operations.length; i++) {
    ingredients = [];
    disabled = operations[i].querySelector('.disable-icon');
    bp = operations[i].querySelector('.breakpoint');
    ing_list = operations[i].querySelectorAll('.arg');

    for (let j = 0; j < ing_list.length; j++) {
      if (ing_list[j].getAttribute('type') == 'checkbox') {
                // checkbox
        ingredients[j] = ing_list[j].checked;
      } else if (ing_list[j].classList.contains('toggle-string')) {
                // toggle_string
        ingredients[j] = {
          option: ing_list[j].previousSibling.children[0].textContent.slice(0, -1),
          string: ing_list[j].value,
        };
      } else {
                // all others
        ingredients[j] = ing_list[j].value;
      }
    }

    item = {
      op: operations[i].querySelector('.arg-title').textContent,
      args: ingredients,
    };

    if (disabled && disabled.getAttribute('disabled') == 'true') {
      item.disabled = true;
    }

    if (bp && bp.getAttribute('break') == 'true') {
      item.breakpoint = true;
    }

    config.push(item);
  }

  return config;
};


/**
 * Moves or removes the breakpoint indicator in the recipe based on the position.
 *
 * @param {number} position
 */
RecipeWaiter.prototype.update_breakpoint_indicator = function (position) {
  const operations = document.querySelectorAll('#rec_list li.operation');
  for (let i = 0; i < operations.length; i++) {
    if (i == position) {
      operations[i].classList.add('break');
    } else {
      operations[i].classList.remove('break');
    }
  }
};


/**
 * Given an operation stub element, this function converts it into a full recipe element with
 * arguments.
 *
 * @param {element} el - The operation stub element from the operations pane
 */
RecipeWaiter.prototype.build_recipe_operation = function (el) {
  const op_name = el.textContent;
  const op = new HTMLOperation(op_name, this.app.operations[op_name], this.app, this.manager);
  el.innerHTML = op.to_full_html();

  if (this.app.operations[op_name].flow_control) {
    el.classList.add('flow-control-op');
  }

    // Disable auto-bake if this is a manual op - this should be moved to the 'operationadd'
    // handler after event restructuring
  if (op.manual_bake && this.app.auto_bake_) {
    this.manager.controls.set_auto_bake(false);
    this.app.alert('Auto-Bake is disabled by default when using this operation.', 'info', 5000);
  }
};

/**
 * Adds the specified operation to the recipe.
 *
 * @fires Manager#operationadd
 * @param {string} name - The name of the operation to add
 * @returns {element}
 */
RecipeWaiter.prototype.add_operation = function (name) {
  const item = document.createElement('li');
  item.classList.add('operation');
  item.innerHTML = name;
  this.build_recipe_operation(item);
  document.getElementById('rec_list').appendChild(item);

  item.dispatchEvent(this.manager.operationadd);
  return item;
};


/**
 * Removes all operations from the recipe.
 *
 * @fires Manager#operationremove
 */
RecipeWaiter.prototype.clear_recipe = function () {
  const rec_list = document.getElementById('rec_list');
  while (rec_list.firstChild) {
    rec_list.removeChild(rec_list.firstChild);
  }
  rec_list.dispatchEvent(this.manager.operationremove);
};


/**
 * Handler for operation dropdown events from toggle_string arguments.
 * Sets the selected option as the name of the button.
 *
 * @param {event} e
 */
RecipeWaiter.prototype.dropdown_toggle_click = function (e) {
  let el = e.target,
    button = el.parentNode.parentNode.previousSibling;

  button.innerHTML = `${el.textContent} <span class='caret'></span>`;
  this.ing_change();
};


/**
 * Handler for operationadd events.
 *
 * @listens Manager#operationadd
 * @fires Manager#statechange
 * @param {event} e
 */
RecipeWaiter.prototype.op_add = function () {
  window.dispatchEvent(this.manager.statechange);
};


/**
 * Handler for operationremove events.
 *
 * @listens Manager#operationremove
 * @fires Manager#statechange
 * @param {event} e
 */
RecipeWaiter.prototype.op_remove = function () {
  window.dispatchEvent(this.manager.statechange);
};