import * as ESTree from 'estree';

import { assert } from 'chai';

import { NodeGuards } from '../../../../src/node/NodeGuards';
import { NodeFactory } from '../../../../src/node/NodeFactory';
import { NodeUtils } from '../../../../src/node/NodeUtils';

describe('NodeGuards', () => {
    describe('isNodeHasBlockScope', () => {
        describe('truthful checks', () => {
            describe('Variant #1: block statement of function declaration', () => {
                const expectedResult: boolean = true;
                const node: ESTree.Node = NodeFactory.blockStatementNode();
                const parentNode: ESTree.FunctionDeclaration = NodeFactory.functionDeclarationNode(
                    'foo',
                    [],
                    node
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isNodeHasBlockScope(node, parentNode);
                });

                it('should check if node has block scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #2: block statement of function expression', () => {
                const expectedResult: boolean = true;
                const node: ESTree.Node = NodeFactory.blockStatementNode();
                const parentNode: ESTree.FunctionExpression = NodeFactory.functionExpressionNode(
                    [],
                    node
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isNodeHasBlockScope(node, parentNode);
                });

                it('should check if node has block scope', () => {
                    assert.equal(result, expectedResult);
                });
            });
        });

        describe('false checks', () => {
            describe('Variant #1: switch-case node', () => {
                const expectedResult: boolean = false;
                const node: ESTree.Node = NodeFactory.switchCaseNode(
                    NodeFactory.literalNode(1),
                    []
                );
                const parentNode: ESTree.FunctionDeclaration = NodeFactory.functionDeclarationNode(
                    'foo',
                    [],
                    NodeFactory.blockStatementNode([
                        NodeFactory.switchStatementNode(
                            NodeFactory.memberExpressionNode(
                                NodeFactory.identifierNode('bar'),
                                NodeFactory.updateExpressionNode(
                                    '++',
                                    NodeFactory.identifierNode('baz')
                                ),
                                true
                            ),
                            [node]
                        )
                    ])
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isNodeHasBlockScope(node, parentNode);
                });

                it('should check if node has block scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #2: literal node', () => {
                const expectedResult: boolean = false;
                const node: ESTree.Node = NodeFactory.literalNode(1);
                const parentNode: ESTree.FunctionDeclaration = NodeFactory.functionDeclarationNode(
                    'foo',
                    [],
                    NodeFactory.blockStatementNode([
                        NodeFactory.expressionStatementNode(
                            NodeFactory.callExpressionNode(
                                NodeFactory.identifierNode('bar'),
                                [node]
                            )
                        )
                    ])
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isNodeHasBlockScope(node, parentNode);
                });

                it('should check if node has block scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #3: block statement of if statement', () => {
                const expectedResult: boolean = false;
                const node: ESTree.Node = NodeFactory.blockStatementNode();
                const parentNode: ESTree.IfStatement = NodeFactory.ifStatementNode(
                    NodeFactory.identifierNode('foo'),
                    node
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isNodeHasBlockScope(node, parentNode);
                });

                it('should check if node has block scope', () => {
                    assert.equal(result, expectedResult);
                });
            });
        });
    });

    describe('isNodeHasScope', () => {
        describe('truthful checks', () => {
            describe('Variant #1: program node', () => {
                const expectedResult: boolean = true;
                const node: ESTree.Node = NodeFactory.programNode();

                let result: boolean;

                before(() => {
                    result = NodeGuards.isNodeHasScope(node);
                });

                it('should check if node has scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #2: block statement node', () => {
                const expectedResult: boolean = true;
                const node: ESTree.Node = NodeFactory.blockStatementNode();

                let result: boolean;

                before(() => {
                    result = NodeGuards.isNodeHasScope(node);
                });

                it('should check if node has scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #3: switch case node', () => {
                const expectedResult: boolean = true;
                const node: ESTree.Node = NodeFactory.switchCaseNode(
                    NodeFactory.literalNode(1),
                    []
                );

                let result: boolean;

                before(() => {
                    result = NodeGuards.isNodeHasScope(node);
                });

                it('should check if node has scope', () => {
                    assert.equal(result, expectedResult);
                });
            });
        });

        describe('false checks', () => {
            describe('Variant #1: literal node', () => {
                const expectedResult: boolean = false;
                const node: ESTree.Node = NodeFactory.literalNode(1);

                let result: boolean;

                before(() => {
                    result = NodeGuards.isNodeHasScope(node);
                });

                it('should check if node has scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #2: identifier node', () => {
                const expectedResult: boolean = false;
                const node: ESTree.Node = NodeFactory.identifierNode('foo');

                let result: boolean;

                before(() => {
                    result = NodeGuards.isNodeHasScope(node);
                });

                it('should check if node has scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #3: if-statement node', () => {
                const expectedResult: boolean = false;
                const node: ESTree.Node = NodeFactory.ifStatementNode(
                    NodeFactory.identifierNode('foo'),
                    NodeFactory.blockStatementNode()
                );

                let result: boolean;

                before(() => {
                    result = NodeGuards.isNodeHasScope(node);
                });

                it('should check if node has scope', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #4: switch-statement node', () => {
                const expectedResult: boolean = false;
                const node: ESTree.Node = NodeFactory.switchStatementNode(
                    NodeFactory.identifierNode('foo'),
                    []
                );

                let result: boolean;

                before(() => {
                    result = NodeGuards.isNodeHasScope(node);
                });

                it('should check if node has scope', () => {
                    assert.equal(result, expectedResult);
                });
            });
        });
    });

    describe('isReplaceableIdentifierNode', () => {
        describe('truthful checks', () => {
            describe('Variant #1: parent node is function declaration node', () => {
                const expectedResult: boolean = true;
                const identifier: ESTree.Identifier = NodeFactory.identifierNode('foo');
                const parentNode: ESTree.Node = NodeFactory.functionDeclarationNode(
                    'bar',
                    [identifier],
                    NodeFactory.blockStatementNode()
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(identifier, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #2: parent node is computed property node', () => {
                const expectedResult: boolean = true;
                const identifier: ESTree.Identifier = NodeFactory.identifierNode('foo');
                const parentNode: ESTree.Node = NodeFactory.propertyNode(
                    identifier,
                    NodeFactory.literalNode('bar'),
                    true
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(identifier, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #4: parent node is computed member expression node', () => {
                const expectedResult: boolean = true;
                const identifier: ESTree.Identifier = NodeFactory.identifierNode('foo');
                const parentNode: ESTree.Node = NodeFactory.memberExpressionNode(
                    NodeFactory.identifierNode('bar'),
                    identifier,
                    true
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(identifier, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #4: parent node is computed method definition node', () => {
                const expectedResult: boolean = true;
                const identifier: ESTree.Identifier = NodeFactory.identifierNode('foo');
                const parentNode: ESTree.Node = NodeFactory.methodDefinitionNode(
                    identifier,
                    NodeFactory.functionExpressionNode([], NodeFactory.blockStatementNode()),
                    'method',
                    true
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(identifier, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });
        });

        describe('false checks', () => {
            describe('Variant #1: node isn\'t an identifier', () => {
                const expectedResult: boolean = false;
                const literal: ESTree.Literal = NodeFactory.literalNode(1);
                const parentNode: ESTree.Node = NodeFactory.expressionStatementNode(
                    NodeFactory.callExpressionNode(
                        NodeFactory.identifierNode('foo'),
                        [literal]
                    )
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(literal, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #2: parent node isn\'t computed property node', () => {
                const expectedResult: boolean = false;
                const identifier: ESTree.Identifier = NodeFactory.identifierNode('foo');
                const parentNode: ESTree.Node = NodeFactory.propertyNode(
                    identifier,
                    NodeFactory.literalNode('bar'),
                    false
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(identifier, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #3: parent node isn\'t computed member expression node', () => {
                const expectedResult: boolean = false;
                const identifier: ESTree.Identifier = NodeFactory.identifierNode('foo');
                const parentNode: ESTree.Node = NodeFactory.memberExpressionNode(
                    NodeFactory.identifierNode('bar'),
                    identifier,
                    false
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(identifier, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });

            describe('Variant #4: parent node isn\'t computed method definition node', () => {
                const expectedResult: boolean = false;
                const identifier: ESTree.Identifier = NodeFactory.identifierNode('foo');
                const parentNode: ESTree.Node = NodeFactory.methodDefinitionNode(
                    identifier,
                    NodeFactory.functionExpressionNode([], NodeFactory.blockStatementNode()),
                    'method',
                    false
                );

                let result: boolean;

                before(() => {
                    NodeUtils.parentizeAst(parentNode);
                    result = NodeGuards.isReplaceableIdentifierNode(identifier, parentNode);
                });

                it('should check if input identifier can be replaced by obfuscated one', () => {
                    assert.equal(result, expectedResult);
                });
            });
        });
    });
});