<?php

namespace Shufflingpixels\IO;

use InvalidArgumentException;
use RuntimeException;

class BinaryReader
{
    public function __construct(protected StreamInterface $stream)
    {
    }

    public static function stream(StreamInterface $stream)
    {
        return new self($stream);
    }

    public static function string(string $data)
    {
        return self::stream(new Buffer($data));
    }

    public function length() : int
    {
        return $this->stream->length();
    }

    public function tell() : int
    {
        return $this->stream->tell();
    }

    public function eof() : bool
    {
        return $this->stream->eof();
    }

    public function seek(int $position, SeekMode $mode = SeekMode::SET)
    {
        $this->stream->seek($position, $mode);
    }

    /**
     * @throws \InvalidArgumentException
     * @throws \RuntimeException
     */
    public function read(int $length): string
    {
        if ($length < 0) {
            throw new InvalidArgumentException('Length must be >= 0');
        }

        $data = $this->stream->read($length);
        if (\strlen($data) !== $length) {
            throw new RuntimeException(
                "Not enough bytes to read {$length} byte(s), " . \strlen($data) . ' read'
            );
        }

        return $data;
    }

    public function readUInt8(): int
    {
        return \ord($this->read(1));
    }

    public function readInt8(): int
    {
        $value = $this->readUInt8();

        return $value >= 0x80 ? $value - 0x100 : $value;
    }

    public function readUInt16LE(): int
    {
        return \unpack('v', $this->read(2))[1];
    }

    public function readUInt16BE(): int
    {
        return \unpack('n', $this->read(2))[1];
    }

    public function readInt16LE(): int
    {
        $value = $this->readUInt16LE();

        return $value >= 0x8000 ? $value - 0x10000 : $value;
    }

    public function readInt16BE(): int
    {
        $value = $this->readUInt16BE();

        return $value >= 0x8000 ? $value - 0x10000 : $value;
    }

    public function readUInt32LE(): int
    {
        return \unpack('V', $this->read(4))[1];
    }

    public function readUInt32BE(): int
    {
        return \unpack('N', $this->read(4))[1];
    }

    public function readInt32LE(): int
    {
        $value = $this->readUInt32LE();

        return $value >= 0x80000000 ? $value - 0x100000000 : $value;
    }

    public function readInt32BE(): int
    {
        $value = $this->readUInt32BE();

        return $value >= 0x80000000 ? $value - 0x100000000 : $value;
    }
}