<?php

declare(strict_types=1);

namespace Eyrie\Tests\Parser;

use Eyrie\Parser\Lexer;
use Eyrie\Parser\TokenType;
use PHPUnit\Framework\TestCase;

class LexerTest extends TestCase
{
    public function testTokenizeTextOnly(): void
    {
        $lexer = new Lexer('Hello World');
        $tokens = $lexer->tokenize();

        $this->assertCount(2, $tokens);
        $this->assertEquals(TokenType::TEXT, $tokens[0]->type);
        $this->assertEquals('Hello World', $tokens[0]->value);
        $this->assertEquals(TokenType::EOF, $tokens[1]->type);
    }

    public function testTokenizeOutput(): void
    {
        $lexer = new Lexer('<< name >>');
        $tokens = $lexer->tokenize();

        $this->assertCount(4, $tokens);
        $this->assertEquals(TokenType::OUTPUT_START, $tokens[0]->type);
        $this->assertEquals(TokenType::IDENTIFIER, $tokens[1]->type);
        $this->assertEquals('name', $tokens[1]->value);
        $this->assertEquals(TokenType::OUTPUT_END, $tokens[2]->type);
        $this->assertEquals(TokenType::EOF, $tokens[3]->type);
    }

    public function testTokenizeControl(): void
    {
        $lexer = new Lexer('<( if true )>');
        $tokens = $lexer->tokenize();

        $this->assertCount(5, $tokens);
        $this->assertEquals(TokenType::CONTROL_START, $tokens[0]->type);
        $this->assertEquals(TokenType::IDENTIFIER, $tokens[1]->type);
        $this->assertEquals('if', $tokens[1]->value);
        $this->assertEquals(TokenType::IDENTIFIER, $tokens[2]->type);
        $this->assertEquals('true', $tokens[2]->value);
        $this->assertEquals(TokenType::CONTROL_END, $tokens[3]->type);
    }

    public function testTokenizeMixed(): void
    {
        $lexer = new Lexer('Hello << name >>!');
        $tokens = $lexer->tokenize();

        $this->assertCount(6, $tokens);
        $this->assertEquals(TokenType::TEXT, $tokens[0]->type);
        $this->assertEquals('Hello ', $tokens[0]->value);
        $this->assertEquals(TokenType::OUTPUT_START, $tokens[1]->type);
        $this->assertEquals(TokenType::IDENTIFIER, $tokens[2]->type);
        $this->assertEquals(TokenType::OUTPUT_END, $tokens[3]->type);
        $this->assertEquals(TokenType::TEXT, $tokens[4]->type);
        $this->assertEquals('!', $tokens[4]->value);
    }
}