#include "hecl/HMDLMeta.hpp"
#include "hecl/Runtime.hpp"
#include <athena/MemoryReader.hpp>

namespace hecl::Runtime
{
static logvisor::Module HMDL_Log("HMDL");

HMDLData::HMDLData(boo::IGraphicsDataFactory::Context& ctx,
                   const void* metaData, const void* vbo, const void* ibo)
{
    HMDLMeta meta;
    {
        athena::io::MemoryReader r((atUint8*)metaData, HECL_HMDL_META_SZ);
        meta.read(r);
    }
    if (meta.magic != 'TACO')
        HMDL_Log.report(logvisor::Fatal, "invalid HMDL magic");

    m_vbo = ctx.newStaticBuffer(boo::BufferUse::Vertex, vbo, meta.vertStride, meta.vertCount);
    m_ibo = ctx.newStaticBuffer(boo::BufferUse::Index, ibo, 4, meta.indexCount);

    size_t elemCount = 2 + meta.colorCount + meta.uvCount + meta.weightCount;
    m_vtxFmtData.reset(new boo::VertexElementDescriptor[elemCount]);

    m_vtxFmtData[0].semantic = boo::VertexSemantic::Position3;
    m_vtxFmtData[1].semantic = boo::VertexSemantic::Normal3;
    size_t e = 2;

    for (size_t i=0 ; i<meta.colorCount ; ++i, ++e)
    {
        m_vtxFmtData[e].semantic = boo::VertexSemantic::ColorUNorm;
        m_vtxFmtData[e].semanticIdx = i;
    }

    for (size_t i=0 ; i<meta.uvCount ; ++i, ++e)
    {
        m_vtxFmtData[e].semantic = boo::VertexSemantic::UV2;
        m_vtxFmtData[e].semanticIdx = i;
    }

    for (size_t i=0 ; i<meta.weightCount ; ++i, ++e)
    {
        m_vtxFmtData[e].semantic = boo::VertexSemantic::Weight;
        m_vtxFmtData[e].semanticIdx = i;
    }

    m_vtxFmt = boo::VertexFormatInfo(elemCount, m_vtxFmtData.get());
}

}