<?php

namespace NoccyLabs\React\Protocol\Binary;

use NoccyLabs\React\Protocol\ProtocolException;
use PHPUnit\Framework\Attributes\CoversClass;

#[CoversClass(BinaryProtocol::class)]
class BinaryProtocolTest extends \PHPUnit\Framework\TestCase
{

    public function testPackingFrames()
    {
        $proto = new BinaryProtocol(
            frameSeparator: "\0"
        );
        $res1 = $proto->packFrame([ 'payload' => 'foobar' ]);
        $this->assertEquals("foobar\0", $res1);

        $proto = new BinaryProtocol(
            frameSeparator: "",
            prependSizeBytes: 2,
        );
        $res1 = $proto->packFrame([ 'payload' => 'foobar' ]);
        $this->assertEquals("\x06\x00foobar", $res1);

    }

    public function testUnpackingFrames()
    {
        $proto = new BinaryProtocol(
            frameSeparator: "\0"
        );
        $res1 = $proto->unpackFrame("foobar\0");
        $this->assertEquals([ 'payload' => 'foobar' ], $res1);

        $proto = new BinaryProtocol(
            frameSeparator: "",
            prependSizeBytes: 2,
        );
        $res1 = $proto->unpackFrame("\x06\x00foobar");
        $this->assertEquals([ 'payload' => 'foobar' ], $res1);

    }

    public function testUnpackingIncompleteFrames()
    {
        $proto = new BinaryProtocol(
            frameSeparator: "\0"
        );
        $res1 = $proto->unpackFrame("foobar\0");
        $this->assertEquals([ 'payload' => 'foobar' ], $res1);

        $proto = new BinaryProtocol(
            frameSeparator: "",
            prependSizeBytes: 2,
        );

        $this->expectException(ProtocolException::class);
        $res0 = $proto->unpackFrame("\x06");
        $this->expectException(ProtocolException::class);
        $res1 = $proto->unpackFrame("\x00foo");
        $res2 = $proto->unpackFrame("bar");

        $this->assertNull($res1);
        $this->assertEquals([ 'payload' => 'foobar' ], $res2);
    }

    public function testConsumingFrames()
    {
        $proto = new BinaryProtocol(
            frameSeparator: "\0"
        );
        $res1 = $proto->unpackFrame("foobar\0");
        $this->assertEquals([ 'payload' => 'foobar' ], $res1);

        $proto = new BinaryProtocol(
            frameSeparator: "",
            prependSizeBytes: 2,
        );

        $buffer = "\x06\x00foobar\x06\x00foobaz";

        $res1 = $proto->consumeFrame($buffer);
        $res2 = $proto->consumeFrame($buffer);

        $this->assertEquals([ 'payload' => 'foobar' ], $res1);
        $this->assertEquals([ 'payload' => 'foobaz' ], $res2);

    }

}