<?php declare(strict_types=1);

namespace PhpParser\Parser;

use PhpParser\Error;
use PhpParser\ErrorHandler;
use PhpParser\Lexer;
use PhpParser\Node\Expr;
use PhpParser\Node\Scalar\LNumber;
use PhpParser\Node\Stmt;
use PhpParser\ParserAbstract;
use PhpParser\ParserTest;

class MultipleTest extends ParserTest
{
    // This provider is for the generic parser tests, just pick an arbitrary order here
    protected function getParser(Lexer $lexer) {
        return new Multiple([new Php5($lexer), new Php7($lexer)]);
    }

    private function getPrefer7() {
        $lexer = new Lexer(['usedAttributes' => []]);
        return new Multiple([new Php7($lexer), new Php5($lexer)]);
    }

    private function getPrefer5() {
        $lexer = new Lexer(['usedAttributes' => []]);
        return new Multiple([new Php5($lexer), new Php7($lexer)]);
    }

    /** @dataProvider provideTestParse */
    public function testParse($code, Multiple $parser, $expected) {
        $this->assertEquals($expected, $parser->parse($code));
    }

    public function provideTestParse() {
        return [
            [
                // PHP 7 only code
                '<?php class Test { function function() {} }',
                $this->getPrefer5(),
                [
                    new Stmt\Class_('Test', ['stmts' => [
                        new Stmt\ClassMethod('function')
                    ]]),
                ]
            ],
            [
                // PHP 5 only code
                '<?php global $$a->b;',
                $this->getPrefer7(),
                [
                    new Stmt\Global_([
                        new Expr\Variable(new Expr\PropertyFetch(new Expr\Variable('a'), 'b'))
                    ])
                ]
            ],
            [
                // Different meaning (PHP 5)
                '<?php $$a[0];',
                $this->getPrefer5(),
                [
                    new Stmt\Expression(new Expr\Variable(
                        new Expr\ArrayDimFetch(new Expr\Variable('a'), LNumber::fromString('0'))
                    ))
                ]
            ],
            [
                // Different meaning (PHP 7)
                '<?php $$a[0];',
                $this->getPrefer7(),
                [
                    new Stmt\Expression(new Expr\ArrayDimFetch(
                        new Expr\Variable(new Expr\Variable('a')), LNumber::fromString('0')
                    ))
                ]
            ],
        ];
    }

    public function testThrownError() {
        $this->expectException(Error::class);
        $this->expectExceptionMessage('FAIL A');

        $parserA = new class implements \PhpParser\Parser {
            public function parse(string $code, ErrorHandler $errorHandler = null) {
                throw new Error('FAIL A');
            }
        };
        $parserB = new class implements \PhpParser\Parser {
            public function parse(string $code, ErrorHandler $errorHandler = null) {
                throw new Error('FAIL B');
            }
        };

        $parser = new Multiple([$parserA, $parserB]);
        $parser->parse('dummy');
    }
}