// MethodProps.h

#ifndef __7Z_METHOD_PROPS_H
#define __7Z_METHOD_PROPS_H

#include "../../Common/MyString.h"
#include "../../Common/Defs.h"

#include "../../Windows/Defs.h"

#include "../../Windows/PropVariant.h"

#include "../ICoder.h"

// UInt64 GetMemoryUsage_LZMA(UInt32 dict, bool isBt, UInt32 numThreads);

inline UInt64 Calc_From_Val_Percents_Less100(UInt64 val, UInt64 percents)
{
  if (percents == 0)
    return 0;
  if (val <= (UInt64)(Int64)-1 / percents)
    return val * percents / 100;
  return val / 100 * percents;
}

UInt64 Calc_From_Val_Percents(UInt64 val, UInt64 percents);

bool StringToBool(const wchar_t *s, bool &res);
HRESULT PROPVARIANT_to_bool(const PROPVARIANT &prop, bool &dest);
unsigned ParseStringToUInt32(const UString &srcString, UInt32 &number);

/*
if (name.IsEmpty() && prop.vt == VT_EMPTY), it doesn't change (resValue) and returns S_OK.
  So you must set (resValue) for default value before calling */
HRESULT ParsePropToUInt32(const UString &name, const PROPVARIANT &prop, UInt32 &resValue);

/* input: (numThreads = the_number_of_processors) */
HRESULT ParseMtProp2(const UString &name, const PROPVARIANT &prop, UInt32 &numThreads, bool &force);

inline HRESULT ParseMtProp(const UString &name, const PROPVARIANT &prop, UInt32 numCPUs, UInt32 &numThreads)
{
  bool forced = false;
  numThreads = numCPUs;
  return ParseMtProp2(name, prop, numThreads, forced);
}


struct CProp
{
  PROPID Id;
  bool IsOptional;
  NWindows::NCOM::CPropVariant Value;
  CProp(): IsOptional(false) {}
};

struct CProps
{
  CObjectVector<CProp> Props;

  void Clear() { Props.Clear(); }

  bool AreThereNonOptionalProps() const
  {
    FOR_VECTOR (i, Props)
      if (!Props[i].IsOptional)
        return true;
    return false;
  }

  void AddProp32(PROPID propid, UInt32 val);
  
  void AddPropBool(PROPID propid, bool val);

  void AddProp_Ascii(PROPID propid, const char *s)
  {
    CProp &prop = Props.AddNew();
    prop.IsOptional = true;
    prop.Id = propid;
    prop.Value = s;
  }

  HRESULT SetCoderProps(ICompressSetCoderProperties *scp, const UInt64 *dataSizeReduce = NULL) const;
  HRESULT SetCoderProps_DSReduce_Aff(ICompressSetCoderProperties *scp, const UInt64 *dataSizeReduce, const UInt64 *affinity) const;
};

class CMethodProps: public CProps
{
  HRESULT SetParam(const UString &name, const UString &value);
public:
  unsigned GetLevel() const;
  int Get_NumThreads() const
  {
    const int i = FindProp(NCoderPropID::kNumThreads);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_UI4)
        return (int)val.ulVal;
    }
    return -1;
  }

  bool Get_DicSize(UInt64 &res) const
  {
    res = 0;
    const int i = FindProp(NCoderPropID::kDictionarySize);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_UI4)
      {
        res = val.ulVal;
        return true;
      }
      if (val.vt == VT_UI8)
      {
        res = val.uhVal.QuadPart;
        return true;
      }
    }
    return false;
  }

  int FindProp(PROPID id) const;

  UInt32 Get_Lzma_Algo() const
  {
    int i = FindProp(NCoderPropID::kAlgorithm);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_UI4)
        return val.ulVal;
    }
    return GetLevel() >= 5 ? 1 : 0;
  }

  UInt64 Get_Lzma_DicSize() const
  {
    UInt64 v;
    if (Get_DicSize(v))
      return v;
    const unsigned level = GetLevel();
    const UInt32 dictSize =
        ( level <= 3 ? ((UInt32)1 << (level * 2 + 16)) :
        ( level <= 6 ? ((UInt32)1 << (level + 19)) :
        ( level <= 7 ? ((UInt32)1 << 25) : ((UInt32)1 << 26)
        )));
    return dictSize;
  }

  bool Get_Lzma_MatchFinder_IsBt() const
  {
    const int i = FindProp(NCoderPropID::kMatchFinder);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_BSTR)
        return ((val.bstrVal[0] | 0x20) != 'h'); // check for "hc"
    }
    return GetLevel() >= 5;
  }

  bool Get_Lzma_Eos() const
  {
    const int i = FindProp(NCoderPropID::kEndMarker);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_BOOL)
        return VARIANT_BOOLToBool(val.boolVal);
    }
    return false;
  }

  bool Are_Lzma_Model_Props_Defined() const
  {
    if (FindProp(NCoderPropID::kPosStateBits) >= 0) return true;
    if (FindProp(NCoderPropID::kLitContextBits) >= 0) return true;
    if (FindProp(NCoderPropID::kLitPosBits) >= 0) return true;
    return false;
  }

  UInt32 Get_Lzma_NumThreads() const
  {
    if (Get_Lzma_Algo() == 0)
      return 1;
    int numThreads = Get_NumThreads();
    if (numThreads >= 0)
      return numThreads < 2 ? 1 : 2;
    return 2;
  }

  UInt64 Get_Lzma_MemUsage(bool addSlidingWindowSize) const;

  /* returns -1, if numThreads is unknown */
  int Get_Xz_NumThreads(UInt32 &lzmaThreads) const
  {
    lzmaThreads = 1;
    int numThreads = Get_NumThreads();
    if (numThreads >= 0 && numThreads <= 1)
      return 1;
    if (Get_Lzma_Algo() != 0)
      lzmaThreads = 2;
    return numThreads;
  }

  UInt64 GetProp_BlockSize(PROPID id) const
  {
    const int i = FindProp(id);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_UI4) { return val.ulVal; }
      if (val.vt == VT_UI8) { return val.uhVal.QuadPart; }
    }
    return 0;
  }

  UInt64 Get_Xz_BlockSize() const
  {
    {
      UInt64 blockSize1 = GetProp_BlockSize(NCoderPropID::kBlockSize);
      UInt64 blockSize2 = GetProp_BlockSize(NCoderPropID::kBlockSize2);
      UInt64 minSize = MyMin(blockSize1, blockSize2);
      if (minSize != 0)
        return minSize;
      UInt64 maxSize = MyMax(blockSize1, blockSize2);
      if (maxSize != 0)
        return maxSize;
    }
    const UInt32 kMinSize = (UInt32)1 << 20;
    const UInt32 kMaxSize = (UInt32)1 << 28;
    const UInt64 dictSize = Get_Lzma_DicSize();
    /* lzma2 code uses fake 4 GiB to calculate ChunkSize. So we do same */
    UInt64 blockSize = (UInt64)dictSize << 2;
    if (blockSize < kMinSize) blockSize = kMinSize;
    if (blockSize > kMaxSize) blockSize = kMaxSize;
    if (blockSize < dictSize) blockSize = dictSize;
    blockSize += (kMinSize - 1);
    blockSize &= ~(UInt64)(kMinSize - 1);
    return blockSize;
  }


  UInt32 Get_BZip2_NumThreads(bool &fixedNumber) const
  {
    fixedNumber = false;
    int numThreads = Get_NumThreads();
    if (numThreads >= 0)
    {
      fixedNumber = true;
      if (numThreads < 1) return 1;
      const unsigned kNumBZip2ThreadsMax = 64;
      if ((unsigned)numThreads > kNumBZip2ThreadsMax) return kNumBZip2ThreadsMax;
      return (unsigned)numThreads;
    }
    return 1;
  }

  UInt32 Get_BZip2_BlockSize() const
  {
    const int i = FindProp(NCoderPropID::kDictionarySize);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_UI4)
      {
        UInt32 blockSize = val.ulVal;
        const UInt32 kDicSizeMin = 100000;
        const UInt32 kDicSizeMax = 900000;
        if (blockSize < kDicSizeMin) blockSize = kDicSizeMin;
        if (blockSize > kDicSizeMax) blockSize = kDicSizeMax;
        return blockSize;
      }
    }
    const unsigned level = GetLevel();
    return 100000 * (level >= 5 ? 9 : (level >= 1 ? level * 2 - 1: 1));
  }

  UInt64 Get_Ppmd_MemSize() const
  {
    const int i = FindProp(NCoderPropID::kUsedMemorySize);
    if (i >= 0)
    {
      const NWindows::NCOM::CPropVariant &val = Props[(unsigned)i].Value;
      if (val.vt == VT_UI4)
        return val.ulVal;
      if (val.vt == VT_UI8)
        return val.uhVal.QuadPart;
    }
    const unsigned level = GetLevel();
    const UInt32 mem = (UInt32)1 << (level + 19);
    return mem;
  }

  void AddProp_Level(UInt32 level)
  {
    AddProp32(NCoderPropID::kLevel, level);
  }

  void AddProp_NumThreads(UInt32 numThreads)
  {
    AddProp32(NCoderPropID::kNumThreads, numThreads);
  }

  void AddProp_EndMarker_if_NotFound(bool eos)
  {
    if (FindProp(NCoderPropID::kEndMarker) < 0)
      AddPropBool(NCoderPropID::kEndMarker, eos);
  }

  void AddProp_BlockSize2(UInt64 blockSize2)
  {
    if (FindProp(NCoderPropID::kBlockSize2) < 0)
    {
      CProp &prop = Props.AddNew();
      prop.IsOptional = true;
      prop.Id = NCoderPropID::kBlockSize2;
      prop.Value = blockSize2;
    }
  }

  HRESULT ParseParamsFromString(const UString &srcString);
  HRESULT ParseParamsFromPROPVARIANT(const UString &realName, const PROPVARIANT &value);
};

class COneMethodInfo: public CMethodProps
{
public:
  AString MethodName;
  UString PropsString;
  
  void Clear()
  {
    CMethodProps::Clear();
    MethodName.Empty();
    PropsString.Empty();
  }
  bool IsEmpty() const { return MethodName.IsEmpty() && Props.IsEmpty(); }
  HRESULT ParseMethodFromPROPVARIANT(const UString &realName, const PROPVARIANT &value);
  HRESULT ParseMethodFromString(const UString &s);
};

#endif
