/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

goog.module('Blockly.test.logicTernary');

const eventUtils = goog.require('Blockly.Events.utils');
const {runSerializationTestSuite} = goog.require('Blockly.test.helpers.serialization');
const {sharedTestSetup, sharedTestTeardown} = goog.require('Blockly.test.helpers.setupTeardown');


suite('Logic ternary', function() {
  setup(function() {
    sharedTestSetup.call(this);
    this.workspace = new Blockly.Workspace();
  });

  teardown(function() {
    sharedTestTeardown.call(this);
  });

  /**
   * Asserts that the logic ternary block has the expected inputs and fields.
   * @param {!Blockly.Block} block The block to check.
   * @param {boolean=} inputsInline Whether the inputs are expected to be
   *    inline.
   */
  function assertBlockStructure(block, inputsInline = false) {
    chai.assert.equal(block.type, 'logic_ternary');
    const inputs = block.inputList;
    chai.assert.exists(inputs, 'Has inputList');
    chai.assert.lengthOf(inputs, 3);
    const ifInput = block.getInput('IF');
    chai.assert.exists(ifInput, 'Has "IF" input');
    chai.assert.equal(ifInput.connection.check_.length, 1);
    chai.assert.equal(ifInput.connection.check_[0], 'Boolean');
    chai.assert.exists(block.onchangeWrapper_, 'Has onchange handler');
    if (inputsInline) {
      chai.assert.isTrue(block.inputsInline);
    } else {
      // inputsInline can be undefined
      chai.assert.isNotTrue(block.inputsInline);
    }
  }

  test('Structure', function() {
    const block = this.workspace.newBlock('logic_ternary');
    assertBlockStructure(block);
  });

  /**
   * Test cases for serialization tests.
   * @type {Array<SerializationTestCase>}
   */
  const testCases = [
    {title: 'Empty XML', xml: '<block type="logic_ternary"/>',
      expectedXml:
          '<block xmlns="https://developers.google.com/blockly/xml" ' +
          'type="logic_ternary" id="1"></block>',
      assertBlockStructure:
          (block) => {
            assertBlockStructure(block);
          },
    },
    {title: 'Inputs inline',
      xml:
          '<block xmlns="https://developers.google.com/blockly/xml" ' +
          'type="logic_ternary" id="1" inline="true"></block>',
      assertBlockStructure:
          (block) => {
            assertBlockStructure(block, true);
          },
    },
  ];
  runSerializationTestSuite(testCases);

  suite('Connections', function() {
    function connectParentAndCheckConnections(
        block, parent, parentInputName, opt_thenInput, opt_elseInput) {
      parent.getInput(parentInputName).connection.connect(block.outputConnection);
      eventUtils.TEST_ONLY.fireNow();  // Force synchronous onchange() call.
      chai.assert.equal(block.getParent(), parent,
          'Successful connection to parent');
      if (opt_thenInput) {
        chai.assert.equal(opt_thenInput.getParent(), block,
            'Input THEN still connected after connecting parent');
      }
      if (opt_elseInput) {
        chai.assert.equal(opt_elseInput.getParent(), block,
            'Input ELSE still connected after connecting parent');
      }
    }
    function connectThenInputAndCheckConnections(
        block, thenInput, opt_elseInput, opt_parent) {
      block.getInput('THEN').connection.connect(thenInput.outputConnection);
      eventUtils.TEST_ONLY.fireNow();  // Force synchronous onchange() call.
      chai.assert.equal(thenInput.getParent(), block, 'THEN is connected');
      if (opt_parent) {
        chai.assert.equal(block.getParent(), opt_parent,
            'Still connected to parent after connecting THEN');
      }
      if (opt_elseInput) {
        chai.assert.equal(opt_elseInput.getParent(), block,
            'Input ELSE still connected after connecting THEN');
      }
    }
    function connectElseInputAndCheckConnections(
        block, elseInput, opt_thenInput, opt_parent) {
      block.getInput('ELSE').connection.connect(elseInput.outputConnection);
      eventUtils.TEST_ONLY.fireNow();  // Force synchronous onchange() call.
      chai.assert.equal(elseInput.getParent(), block, 'ELSE is connected');
      if (opt_parent) {
        chai.assert.equal(block.getParent(), opt_parent,
            'Still connected to parent after connecting ELSE');
      }
      if (opt_thenInput) {
        chai.assert.equal(opt_thenInput.getParent(), block,
            'Input THEN still connected after connecting ELSE');
      }
    }
    function connectInputsAndCheckConnections(
        block, thenInput, elseInput, opt_parent) {
      connectThenInputAndCheckConnections(block, thenInput, null, opt_parent);
      connectElseInputAndCheckConnections(block, elseInput, thenInput, opt_parent);
    }
    setup(function() {
      this.block = this.workspace.newBlock('logic_ternary');
    });
    suite('No parent', function() {
      test('Attach inputs same type', function() {
        const string1 = this.workspace.newBlock('text');
        const string2 = this.workspace.newBlock('text_charAt');

        connectInputsAndCheckConnections(this.block, string1, string2);
      });
      test('Attach inputs different types', function() {
        const string = this.workspace.newBlock('text');
        const number = this.workspace.newBlock('math_number');

        connectInputsAndCheckConnections(this.block, string, number);
      });
    });
    suite('With parent already attached', function() {
      test('Attach inputs same type with matching parent', function() {
        const parent = this.workspace.newBlock('text_trim');

        connectParentAndCheckConnections(this.block, parent, 'TEXT');

        const string1 = this.workspace.newBlock('text');
        const string2 = this.workspace.newBlock('text_charAt');

        connectInputsAndCheckConnections(this.block, string1, string2, parent);
      });
      test('Attach inputs different types with unchecked parent', function() {
        const parent = this.workspace.newBlock('text_print');

        connectParentAndCheckConnections(this.block, parent, 'TEXT');

        const string = this.workspace.newBlock('text');
        const number = this.workspace.newBlock('math_number');

        connectInputsAndCheckConnections(this.block, string, number, parent);
      });
      test('Attach inputs different types with permissive parent', function() {
        const parent = this.workspace.newBlock('text_length');  // Allows String or Array

        connectParentAndCheckConnections(this.block, parent, 'VALUE');

        const string = this.workspace.newBlock('text');
        const array = this.workspace.newBlock('lists_create_empty');

        connectInputsAndCheckConnections(this.block, string, array, parent);
      });
      test('Attach mismatch type to then causes break with parent', function() {
        const parent = this.workspace.newBlock('text_length');  // Allows String or Array

        connectParentAndCheckConnections(this.block, parent, 'VALUE');

        const string = this.workspace.newBlock('text');
        const number = this.workspace.newBlock('math_number');

        connectElseInputAndCheckConnections(this.block, string, null, parent);

        // Adding mismatching number.
        connectThenInputAndCheckConnections(this.block, number, string);
        chai.assert.equal(this.block.getRootBlock(), this.block,
            'Disconnected from parent');
      });
      test('Attach mismatch type to else causes break with parent', function() {
        const parent = this.workspace.newBlock('text_length');  // Allows String or Array

        connectParentAndCheckConnections(this.block, parent, 'VALUE');

        const string = this.workspace.newBlock('text');
        const number = this.workspace.newBlock('math_number');

        connectThenInputAndCheckConnections(this.block, string, null, parent);

        // Adding mismatching number.
        connectElseInputAndCheckConnections(this.block, number, string);
        chai.assert.equal(this.block.getRootBlock(), this.block,
            'Disconnected from parent');
      });
    });
    suite('Attaching parent after inputs', function() {
      test('Unchecked parent with inputs different types', function() {
        const string = this.workspace.newBlock('text');
        const number = this.workspace.newBlock('math_number');

        connectInputsAndCheckConnections(this.block, string, number);

        const parent = this.workspace.newBlock('text_print');
        connectParentAndCheckConnections(
            this.block, parent, 'TEXT', string, number);
      });
      test('Permissive parent with inputs different types', function() {
        const string = this.workspace.newBlock('text');
        const array = this.workspace.newBlock('lists_create_empty');

        connectInputsAndCheckConnections(this.block, string, array);

        const parent = this.workspace.newBlock('text_print');
        connectParentAndCheckConnections(
            this.block, parent, 'TEXT', string, array);
      });
      test('Mismatch with then causes break with then', function() {
        const number = this.workspace.newBlock('math_number');
        const string = this.workspace.newBlock('text');

        connectInputsAndCheckConnections(this.block, number, string);

        const parent = this.workspace.newBlock('text_trim');
        connectParentAndCheckConnections(
            this.block, parent, 'TEXT', null, string);
        chai.assert.equal(number.getRootBlock(), number,
            'Input THEN disconnected');
      });
      test('Mismatch with else causes break with else', function() {
        const string = this.workspace.newBlock('text');
        const number = this.workspace.newBlock('math_number');

        connectInputsAndCheckConnections(this.block, string, number);

        const parent = this.workspace.newBlock('text_trim');
        connectParentAndCheckConnections(this.block, parent, 'TEXT', string);
        chai.assert.equal(number.getRootBlock(), number,
            'Input ELSE disconnected');
      });
    });
  });
});