/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: LineParser.hpp
    Date: 2021-6-9
    Author: Reece
***/
#pragma once

namespace Aurora::Parse
{
    static AuROString SplitNewlines(const AuROString &in,
                                    AuConsumer<const AuROString &> lineCallback,
                                    bool bReturnRemaining = false)
    {
        AuMach index = 0, startIdx = 0;

        while ((index = in.Find("\n", startIdx)) != AuString::npos)
        {
            auto line = in.Substr(startIdx, index - startIdx);
            startIdx = index + 1;

            if (line[line.Size() - 1] == '\r')
            {
                line = line.RemoveSuffix(1);
            }

            lineCallback(line);

            if (startIdx >= in.Size())
            {
                break;
            }
        }

        if (bReturnRemaining)
        {
            return in.Substr(startIdx);
        }
        else
        {
            lineCallback(in.Substr(startIdx));
            return {};
        }
    }

    static AuList<AuROString> SplitString(const AuROString &in, AuUInt16 characters)
    {
        AuList<AuROString> ret;
        for (AuUInt i = 0u; i < in.Size(); )
        {
            AuUInt start, end, len;

            start = i;
            end   = AuMin(AuUInt(in.size()), AuUInt(i + characters));
            if (end - 1)
            {
                auto uLastCodepointIndex  = AuCodepointsFindPreviousValidByteOffsetFromByteOffset(in, end);
                auto uLastByteOffset      = AuCodepointsNextLength(in.Substr(uLastCodepointIndex));
                end = uLastCodepointIndex + uLastByteOffset;
            }
            len   = end - start;
            i    += len;

            ret.push_back(in.Substr(start, len));
        }
        return ret;
    }
    
    static AuString SplitStringDelm(const AuROString &in, const AuROString &delm, AuUInt16 characters)
    {
        AuString ret;
        ret.reserve(in.Size());
        for (AuUInt i = 0u; i < in.Size(); )
        {
            AuUInt start, end, len;

            if (i != 0)
            {
                ret.insert(ret.size(), delm);
            }

            start = i;
            end   = AuMin(AuUInt(in.Size()), AuUInt(i + characters));
            if (end - 1)
            {
                auto uLastCodepointIndex  = AuCodepointsFindPreviousValidByteOffsetFromByteOffset(in, end);
                auto uLastByteOffset      = AuCodepointsNextLength(in.Substr(uLastCodepointIndex));
                end = uLastCodepointIndex + uLastByteOffset;
            }
            len   = end - start;
            i    += len;

            ret.insert(ret.size(), in.Substr(start, len));
        }
        return ret;
    }
}