// iVProg - www.usp.br/line/ivprog
// LInE - Free Education, Private Data

import * as Models from '../ivprog_elements';
import { LocalizedStrings } from '../../services/localizedStringsService';
import * as VariableValueMenuManagement from './variable_value_menu';

export function renderExpression (command, expression, function_obj, initial_el_to_render) {
  //D console.log("src/ivprog/js/visualUI/commands/conditional_expression.js: renderExpression(.): command=" +
  //D   JSON.stringify(command) + "\nexpression=" + JSON.stringify(expression) + "\nfunction_obj=||" + JSON.stringify(function_obj) + "||\n");
  expression.dom_object = initial_el_to_render;

  if (expression.expression == null || expression.expression.length < 1) {
    renderStartMenu(command, expression, function_obj, initial_el_to_render);
  } else {
    var main_div = $('<div class="expression_elements"></div>');

    switch (expression.expression.type) {
      case Models.EXPRESSION_TYPES.exp_logic:
        renderLogicExpression(command, expression, expression.expression, function_obj, main_div, initial_el_to_render);
        break;
      case Models.EXPRESSION_TYPES.exp_arithmetic:
        renderArithmeticExpression(command, expression, expression.expression, function_obj, main_div);
        break;
      }

    initial_el_to_render.append(main_div);  
    var restartMenu = $('<div class="ui restart_expression"><i class="ui icon undo"></i></div>');
    initial_el_to_render.append(restartMenu);  
    restartMenu.on('click', function(e){
      expression.expression = null;
      initial_el_to_render.empty();
      renderExpression(command, expression, function_obj, initial_el_to_render);
      });
    }
  }

function renderArithmeticOperator (command, all_expression, expression_arithmetic, arithmetic_operator, function_obj, element_to_append) {
  var menu_operator = $('<div class="ui dropdown"><div class="text"></div><i class="dropdown icon"></i></div>');
  menu_operator.dropdown({
    values: [
      { name     : '>',
        value    : Models.ARITHMETIC_COMPARISON.greater_than,
        selected : (arithmetic_operator == Models.ARITHMETIC_COMPARISON.greater_than)
        },
      { name     : '<',
        value    : Models.ARITHMETIC_COMPARISON.less_than,
        selected : (arithmetic_operator == Models.ARITHMETIC_COMPARISON.less_than)
        },
      { name     : '==',
        value    : Models.ARITHMETIC_COMPARISON.equals_to,
        selected : (arithmetic_operator == Models.ARITHMETIC_COMPARISON.equals_to)
        },
      { name     : '!=',
        value    : Models.ARITHMETIC_COMPARISON.not_equals_to,
        selected : (arithmetic_operator == Models.ARITHMETIC_COMPARISON.not_equals_to)
        },
      { name     : '>=',
        value    : Models.ARITHMETIC_COMPARISON.greater_than_or_equals_to,
        selected : (arithmetic_operator == Models.ARITHMETIC_COMPARISON.greater_than_or_equals_to)
        },
      { name     : '<=',
        value    : Models.ARITHMETIC_COMPARISON.less_than_or_equals_to,
        selected : (arithmetic_operator == Models.ARITHMETIC_COMPARISON.less_than_or_equals_to)
        }
      ],
    onChange: function(value, text, $selectedItem) {
      expression_arithmetic.operator = value;
      }
    });

  element_to_append.append(menu_operator);
  }

function renderLogicOperator (command, all_expression, expression_logic, logic_operator, function_obj, element_to_append, initial_el_to_render) {

  var menu_operator = $('<div class="ui dropdown"><div class="text"></div><i class="dropdown icon"></i></div>');
  menu_operator.dropdown({
    values: [
      { name     : '==',
        value    : Models.LOGIC_COMPARISON.equals_to,
        selected : (logic_operator == Models.LOGIC_COMPARISON.equals_to)
        },
      { name     : '!=',
        value    : Models.LOGIC_COMPARISON.not_equals_to,
        selected : (logic_operator == Models.LOGIC_COMPARISON.not_equals_to)
        },
      { name     : '&&',
        value    : Models.LOGIC_COMPARISON.and,
        selected : (logic_operator == Models.LOGIC_COMPARISON.and)
        },
      { name     : '||',
        value    : Models.LOGIC_COMPARISON.or,
        selected : (logic_operator == Models.LOGIC_COMPARISON.or)
        }
      ],
    onChange: function(value, text, $selectedItem) {
      if ($selectedItem) {
        expression_logic.operator = value;
        if (expression_logic.second_operand == null) {
          expression_logic.second_operand = new Models.VariableValueMenu(VariableValueMenuManagement.VAR_OR_VALUE_TYPES.all, null, null, null, true);
          initial_el_to_render.empty();
          renderExpression(command, all_expression, function_obj, initial_el_to_render);
          }
        }
      }
    });

  element_to_append.append(menu_operator);
  }


function renderLogicExpression (command, all_expression, expression_logic, function_obj, element_to_append, initial_el_to_render) {
  var exp_el_par_1 = $(' <span class="span_command_spec"> </span> ');
  var exp_el_expr_el_1 = $('<div class="expression_element"></div>');
  var exp_el_expr_operand = $('<div class="expression_element"></div>');
  var exp_el_expr_el_2 = $('<div class="expression_element"></div>');
  var exp_el_par_2 = $(' <span class="span_command_spec"> </span> ');

  if (expression_logic.first_operand.type == Models.EXPRESSION_TYPES.exp_logic) {
    renderLogicExpression(command, all_expression, expression_logic.first_operand, function_obj, exp_el_expr_el_1);
  } else if (expression_logic.first_operand.type == Models.EXPRESSION_TYPES.exp_arithmetic) {
    renderArithmeticExpression(command, all_expression, expression_logic.first_operand, function_obj, exp_el_expr_el_1);
  } else {
    VariableValueMenuManagement.renderMenu(command, expression_logic.first_operand, exp_el_expr_el_1, function_obj);
    }

  element_to_append.append(exp_el_par_1);
  element_to_append.append(exp_el_expr_el_1);

  renderLogicOperator(command, all_expression, expression_logic, expression_logic.operator, function_obj, exp_el_expr_operand, initial_el_to_render);

  element_to_append.append(exp_el_expr_operand);

  if (expression_logic.second_operand) {
    if (expression_logic.second_operand.type == Models.EXPRESSION_TYPES.exp_logic) {
      renderLogicExpression(command, all_expression, expression_logic.second_operand, function_obj, exp_el_expr_el_2);
    } else if (expression_logic.second_operand.type == Models.EXPRESSION_TYPES.exp_arithmetic) {
      renderArithmeticExpression(command, all_expression, expression_logic.second_operand, function_obj, exp_el_expr_el_2);
    } else {
      VariableValueMenuManagement.renderMenu(command, expression_logic.second_operand, exp_el_expr_el_2, function_obj);
      }
    element_to_append.append(exp_el_expr_el_2);
    }
  element_to_append.append(exp_el_par_2);
  }

function renderArithmeticExpression (command, all_expression, expression_arithmetic, function_obj, element_to_append) {
  var exp_el_par_1 = $(' <span class="span_command_spec"> </span> ');
  var exp_el_expr_el_1 = $('<div class="expression_element"></div>');
  var exp_el_expr_operand = $('<div class="expression_element"></div>');
  var exp_el_expr_el_2 = $('<div class="expression_element"></div>');
  var exp_el_par_2 = $(' <span class="span_command_spec"> </span> ');

  if (expression_arithmetic.first_operand.type == Models.EXPRESSION_TYPES.exp_logic) {
    renderLogicExpression(command, all_expression, expression_arithmetic.first_operand, function_obj, exp_el_expr_el_1);
  } else if (expression_arithmetic.first_operand.type == Models.EXPRESSION_TYPES.exp_arithmetic) {
    renderArithmeticExpression(command, all_expression, expression_arithmetic.first_operand, function_obj, exp_el_expr_el_1);
  } else {
    VariableValueMenuManagement.renderMenu(command, expression_arithmetic.first_operand, exp_el_expr_el_1, function_obj);
    }

  if (expression_arithmetic.second_operand.type == Models.EXPRESSION_TYPES.exp_logic) {
    renderLogicExpression(command, all_expression, expression_arithmetic.second_operand, function_obj, exp_el_expr_el_2);
  } else if (expression_arithmetic.second_operand.type == Models.EXPRESSION_TYPES.exp_arithmetic) {
    renderArithmeticExpression(command, all_expression, expression_arithmetic.second_operand, function_obj, exp_el_expr_el_2);
  } else {
    VariableValueMenuManagement.renderMenu(command, expression_arithmetic.second_operand, exp_el_expr_el_2, function_obj);
    }

  renderArithmeticOperator(command, all_expression, expression_arithmetic, expression_arithmetic.operator, function_obj, exp_el_expr_operand);

  element_to_append.append(exp_el_par_1);
  element_to_append.append(exp_el_expr_el_1);
  element_to_append.append(exp_el_expr_operand);
  element_to_append.append(exp_el_expr_el_2);
  element_to_append.append(exp_el_par_2);
  }

function renderStartMenu (command, expression, function_obj, initial_el_to_render) {
  var start_menu = '';
  start_menu += '<div class="ui dropdown menu_start_rendered"><div class="text"><i>' +
    LocalizedStrings.getUI('expression_menu_select') + '</i></div><i class="dropdown icon"></i><div class="menu">';
  start_menu += '<div class="item" data-exp="' + Models.EXPRESSION_TYPES.exp_logic + '">' +
    LocalizedStrings.getUI('text_logic_expression') + ' (EL == EL and EL)</div>';
  start_menu += '<div class="item" data-exp="' + Models.EXPRESSION_TYPES.exp_arithmetic + '">' +
    LocalizedStrings.getUI('text_arithmetic_expression') + ' (EA < EA)</div>';
  start_menu += '</div></div>';
  start_menu = $(start_menu);

  start_menu.dropdown({
    onChange: function(value, text, $selectedItem) {
      switch ($selectedItem.data('exp')) {
        case Models.EXPRESSION_TYPES.exp_logic:
          expression.expression = 
            new Models.LogicExpression(false, 
              new Models.VariableValueMenu(VariableValueMenuManagement.VAR_OR_VALUE_TYPES.all, null, null, null, true));
          break;
        case Models.EXPRESSION_TYPES.exp_arithmetic:
          expression.expression = 
            new Models.ArithmeticExpression(
              new Models.VariableValueMenu(VariableValueMenuManagement.VAR_OR_VALUE_TYPES.all, null, null, null, true), 
              new Models.VariableValueMenu(VariableValueMenuManagement.VAR_OR_VALUE_TYPES.all, null, null, null, true), 
              Models.ARITHMETIC_COMPARISON.less_than);
          break;
        }
      initial_el_to_render.html('');
      renderExpression(command, expression, function_obj, initial_el_to_render);
      },
      selectOnKeydown: false
    });

  initial_el_to_render.append(' <span class="span_command_spec"> </span> ');
  initial_el_to_render.append(start_menu);
  initial_el_to_render.append(' <span class="span_command_spec"> </span> ');
  }