#include "SkywardSwordFileReader.hpp"
#include "SkywardSwordFile.hpp"
#include "SkywardSwordQuest.hpp"
#include "InvalidOperationException.hpp"
#include <iostream>

namespace zelda
{
namespace io
{

SkywardSwordFileReader::SkywardSwordFileReader(Uint8* data, Uint64 length)
    : base(data, length)
{
    base::setEndianess(BigEndian);
}

SkywardSwordFileReader::SkywardSwordFileReader(const std::string& filename)
    : base(filename)
{
    base::setEndianess(BigEndian);
}

SkywardSwordFile* SkywardSwordFileReader::read()
{
    SkywardSwordFile* file = NULL;
    try
    {
        if (base::length() != 0xFBE0)
            throw zelda::error::InvalidOperationException("SSFileReader::read -> File not the expected size of 0xFBE0");

        Uint32 magic = base::readUInt32();

        if (magic != SkywardSwordFile::USMagic && magic != SkywardSwordFile::JAMagic && magic != SkywardSwordFile::EUMagic)
            throw zelda::error::InvalidOperationException("SSFileReader::read -> Not a valid Skyward Sword save file");

        base::seek(0x01C, base::Beginning);
        Uint32 headerSize = base::readUInt32(); // Seems to be (headerSize - 1)

        if (headerSize != 0x1D)
            throw zelda::error::InvalidOperationException("SSFileHeader::read -> Invalid header size, Corrupted data?");

        // Time to read in each slot
        file = new SkywardSwordFile;
        file->setRegion((magic == SkywardSwordFile::USMagic ? NTSCURegion : (magic == SkywardSwordFile::JAMagic ? NTSCJRegion : PALRegion)));
        for (int i = 0; i < 3; i++)
        {
            SkywardSwordQuest* q = new SkywardSwordQuest((Uint8*)base::readBytes(0x53C0), 0x53C0);
            Uint64 pos = base::position();
            // seek to the skip data for this particular quest
            base::seek(0xFB60 + (i * 0x24), base::Beginning);
            q->setSkipData(base::readUBytes(0x24));
            base::seek(pos, base::Beginning);
            file->addQuest(q);
        }
    }
    catch(...)
    {
        delete file;
        file = NULL;
        throw;
    }

    return file;
}

} // io
} // zelda