<?php
namespace Fenom;
use Fenom\Tokenizer;

class TokenizerTest extends \PHPUnit_Framework_TestCase
{

    public function testTokens()
    {
        $code = 'hello, please  resolve this example: sin($x)+tan($x*$t) = {U|[0,1]}';
        $tokens = new Tokenizer($code);
        $this->assertSame($tokens, $tokens->back());
        $this->assertSame(T_STRING, $tokens->key());
        $this->assertSame("hello", $tokens->current());
        $this->assertSame(1, $tokens->getLine());


        $this->assertTrue($tokens->isNext(","));

        $this->assertFalse($tokens->isNext("="));
        $this->assertFalse($tokens->isNext(T_STRING));
        $this->assertFalse($tokens->isNext($tokens::MACRO_UNARY));

        $this->assertFalse($tokens->isNext("=", T_STRING, $tokens::MACRO_UNARY));
        $this->assertTrue($tokens->isNext("=", T_STRING, $tokens::MACRO_UNARY, ","));

        $this->assertSame(",", $tokens->getNext());
        $this->assertSame(",", $tokens->key());
        $this->assertSame("please", $tokens->getNext(T_STRING));
        $this->assertSame(array(
            T_STRING,
            'please',
            '  ',
            1,
            'T_STRING'
        ), $tokens->curr);
        $this->assertSame("resolve", $tokens->getNext($tokens::MACRO_UNARY, T_STRING));

        $tokens->next();
        $tokens->next();
        $tokens->next();

        $this->assertSame(":", $tokens->current());
        $this->assertSame(":", $tokens->key());


        $this->assertSame("sin", $tokens->getNext($tokens::MACRO_STRING));
        $this->assertSame("sin", $tokens->current());
        $this->assertSame(T_STRING, $tokens->key());
        $this->assertTrue($tokens->is(T_STRING));
        $this->assertTrue($tokens->is($tokens::MACRO_STRING));
        $this->assertFalse($tokens->is($tokens::MACRO_EQUALS));
        $this->assertFalse($tokens->is(T_DNUMBER));
        $this->assertFalse($tokens->is(":"));
        $this->assertSame("(", $tokens->getNext("(", ")"));

        $tokens->next();
        $tokens->next();
        $this->assertSame("+", $tokens->getNext($tokens::MACRO_BINARY));

        $this->assertSame('sin($x)+tan($x*$t)', $tokens->getSnippetAsString(-4, 6));
        $this->assertSame($code, $tokens->getSnippetAsString(-100, 100));
    }

    public function testSkip()
    {
        $text = "1 foo: bar ( 3 + double ) ";
        $tokens = new Tokenizer($text);

        $tokens->skip()->skip(T_STRING)->skip(':');
        try {
            $tokens->skip(T_STRING)->skip('(')->skip(':');
        } catch (\Exception $e) {
            $this->assertInstanceOf('Fenom\Error\UnexpectedTokenException', $e);
            $this->assertStringStartsWith("Unexpected token '3' in expression, expect ':'", $e->getMessage());
        }
        $this->assertTrue($tokens->valid());
        $this->assertSame("3", $tokens->current());

        $this->assertSame(T_LNUMBER, $tokens->key());
        $this->assertSame($tokens, $tokens->next());
        $tokens->next();
        $this->assertSame("double", $tokens->getAndNext());
        $this->assertSame(")", $tokens->current());
        $this->assertTrue($tokens->isLast());
        $this->assertSame($tokens, $tokens->next());
    }

}