<?php

declare(strict_types=1);

namespace Diffhead\PHP\DataEnrichmentKit\Tests\Service;

use Diffhead\PHP\DataEnrichmentKit\Object\Request;
use Diffhead\PHP\DataEnrichmentKit\Service\Parser;
use Diffhead\PHP\DataEnrichmentKit\Exception\InvalidRequest;
use Diffhead\PHP\DataEnrichmentKit\Interface\Parser as ParserInterface;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\CoversMethod;
use PHPUnit\Framework\TestCase;

#[CoversClass(Parser::class)]
#[CoversMethod(Parser::class, 'parse')]
class ParserTest extends TestCase
{
    public function testImplementsParserInterface(): void
    {
        $this->assertInstanceOf(ParserInterface::class, new Parser());
    }

    public function testParseValidInput(): void
    {
        $parser = new Parser();
        $input = 'key1+alias1,key2+alias2@entity,field';

        $request = $parser->parse($input);

        $this->assertInstanceOf(Request::class, $request);
        $this->assertEquals('entity', $request->target()->entity());
        $this->assertEquals('field', $request->target()->field());

        $items = iterator_to_array($request->items()->getIterator());
        $this->assertCount(2, $items);
        $this->assertEquals('key1', $items[0]->key());
        $this->assertEquals('alias1', $items[0]->alias());
        $this->assertEquals('key2', $items[1]->key());
        $this->assertEquals('alias2', $items[1]->alias());
    }

    public function testParseThrowsExceptionOnEmptyTarget(): void
    {
        $this->expectException(InvalidRequest::class);

        $parser = new Parser();
        $parser->parse('key1+alias1,key2+alias2@');
    }

    public function testParseThrowsExceptionOnInvalidTarget(): void
    {
        $this->expectException(InvalidRequest::class);

        $parser = new Parser();
        $parser->parse('key1+alias1,key2+alias2@entity');
    }

    public function testParseThrowsExceptionOnEmptyInput(): void
    {
        $this->expectException(InvalidRequest::class);

        $parser = new Parser();
        $parser->parse('');
    }
}