/**
 * @license
 * Copyright 2017 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @fileoverview Variable blocks for Blockly.
 * @suppress {extraRequire|missingRequire|checkTypes}
 */
'use strict';

goog.provide('Blockly.blocks.variablesDynamic');
goog.provide('Blockly.Constants.VariablesDynamic');

goog.require('Blockly');
goog.require('Blockly.FieldLabel');
goog.require('Blockly.FieldVariable');


/**
 * Unused constant for the common HSV hue for all blocks in this category.
 * @deprecated Use Blockly.Msg['VARIABLES_DYNAMIC_HUE']. (2018 April 5)
 */
Blockly.Constants.VariablesDynamic.HUE = 310;

Blockly.defineBlocksWithJsonArray([
  // Block for variable getter.
  {
    "type": "variables_get_dynamic",
    "message0": "%1",
    "args0": [{
      "type": "field_variable",
      "name": "VAR",
      "variable": "%{BKY_VARIABLES_DEFAULT_NAME}",
    }],
    "output": null,
    "style": "variable_dynamic_blocks",
    "helpUrl": "%{BKY_VARIABLES_GET_HELPURL}",
    "tooltip": "%{BKY_VARIABLES_GET_TOOLTIP}",
    "extensions": ["contextMenu_variableDynamicSetterGetter"],
  },
  // Block for variable setter.
  {
    "type": "variables_set_dynamic",
    "message0": "%{BKY_VARIABLES_SET}",
    "args0": [{
      "type": "field_variable",
      "name": "VAR",
      "variable": "%{BKY_VARIABLES_DEFAULT_NAME}",
    },
    {
      "type": "input_value",
      "name": "VALUE",
    },
    ],
    "previousStatement": null,
    "nextStatement": null,
    "style": "variable_dynamic_blocks",
    "tooltip": "%{BKY_VARIABLES_SET_TOOLTIP}",
    "helpUrl": "%{BKY_VARIABLES_SET_HELPURL}",
    "extensions": ["contextMenu_variableDynamicSetterGetter"],
  },
]);

/**
 * Mixin to add context menu items to create getter/setter blocks for this
 * setter/getter.
 * Used by blocks 'variables_set_dynamic' and 'variables_get_dynamic'.
 * @mixin
 * @augments Blockly.Block
 * @package
 * @readonly
 */
Blockly.Constants.VariablesDynamic.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN = {
  /**
   * Add menu option to create getter/setter block for this setter/getter.
   * @param {!Array} options List of menu options to add to.
   * @this {Blockly.Block}
   */
  customContextMenu: function(options) {
    // Getter blocks have the option to create a setter block, and vice versa.
    if (!this.isInFlyout) {
      let oppositeType;
      let contextMenuMsg;
      const id = this.getFieldValue('VAR');
      const variableModel = this.workspace.getVariableById(id);
      const varType = variableModel.type;
      if (this.type === 'variables_get_dynamic') {
        oppositeType = 'variables_set_dynamic';
        contextMenuMsg = Blockly.Msg['VARIABLES_GET_CREATE_SET'];
      } else {
        oppositeType = 'variables_get_dynamic';
        contextMenuMsg = Blockly.Msg['VARIABLES_SET_CREATE_GET'];
      }

      const option = {enabled: this.workspace.remainingCapacity() > 0};
      const name = this.getField('VAR').getText();
      option.text = contextMenuMsg.replace('%1', name);
      const xmlField = Blockly.utils.xml.createElement('field');
      xmlField.setAttribute('name', 'VAR');
      xmlField.setAttribute('variabletype', varType);
      xmlField.appendChild(Blockly.utils.xml.createTextNode(name));
      const xmlBlock = Blockly.utils.xml.createElement('block');
      xmlBlock.setAttribute('type', oppositeType);
      xmlBlock.appendChild(xmlField);
      option.callback = Blockly.ContextMenu.callbackFactory(this, xmlBlock);
      options.push(option);
    } else {
      if (this.type === 'variables_get_dynamic' ||
       this.type === 'variables_get_reporter_dynamic') {
        const renameOption = {
          text: Blockly.Msg['RENAME_VARIABLE'],
          enabled: true,
          callback: Blockly.Constants.Variables.RENAME_OPTION_CALLBACK_FACTORY(this),
        };
        const name = this.getField('VAR').getText();
        const deleteOption = {
          text: Blockly.Msg['DELETE_VARIABLE'].replace('%1', name),
          enabled: true,
          callback: Blockly.Constants.Variables.DELETE_OPTION_CALLBACK_FACTORY(this),
        };
        options.unshift(renameOption);
        options.unshift(deleteOption);
      }
    }
  },
  /**
   * Called whenever anything on the workspace changes.
   * Set the connection type for this block.
   * @param {!Blockly.Events.Abstract} _e Change event.
   * @this {Blockly.Block}
   */
  onchange: function(_e) {
    const id = this.getFieldValue('VAR');
    const variableModel = Blockly.Variables.getVariable(this.workspace, id);
    if (this.type === 'variables_get_dynamic') {
      this.outputConnection.setCheck(variableModel.type);
    } else {
      this.getInput('VALUE').connection.setCheck(variableModel.type);
    }
  },
};

/**
  * Callback for rename variable dropdown menu option associated with a
  * variable getter block.
  * @param {!Blockly.Block} block The block with the variable to rename.
  * @return {!function()} A function that renames the variable.
  */
Blockly.Constants.VariablesDynamic.RENAME_OPTION_CALLBACK_FACTORY = function(block) {
  return function() {
    const workspace = block.workspace;
    const variable = block.getField('VAR').getVariable();
    Blockly.Variables.renameVariable(workspace, variable);
  };
};

/**
 * Callback for delete variable dropdown menu option associated with a
 * variable getter block.
 * @param {!Blockly.Block} block The block with the variable to delete.
 * @return {!function()} A function that deletes the variable.
 */
Blockly.Constants.VariablesDynamic.DELETE_OPTION_CALLBACK_FACTORY = function(block) {
  return function() {
    const workspace = block.workspace;
    const variable = block.getField('VAR').getVariable();
    workspace.deleteVariableById(variable.getId());
    workspace.refreshToolboxSelection();
  };
};

Blockly.Extensions.registerMixin('contextMenu_variableDynamicSetterGetter',
    Blockly.Constants.VariablesDynamic.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN);