//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================//

#ifndef MATERIALPATCH_H
#define MATERIALPATCH_H
#ifdef _WIN32
#pragma once
#endif

#include "utilmatlib.h"

struct MaterialPatchInfo_t {
    const char *m_pKey;
    const char *m_pRequiredOriginalValue;  // NULL if you don't require one.
    const char *m_pValue;
    MaterialPatchInfo_t() { memset(this, 0, sizeof(*this)); }
};

enum MaterialPatchType_t {
    PATCH_INSERT = 0,  // Add the key no matter what
    PATCH_REPLACE,     // Add the key only if it exists
};

void CreateMaterialPatch(const char *pOriginalMaterialName,
                         const char *pNewMaterialName, const char *pNewKey,
                         const char *pNewValue, MaterialPatchType_t nPatchType);

// A version which allows you to use multiple key values
void CreateMaterialPatch(const char *pOriginalMaterialName,
                         const char *pNewMaterialName, int nKeys,
                         const MaterialPatchInfo_t *pInfo,
                         MaterialPatchType_t nPatchType);

// This gets a keyvalue from the *unpatched* version of the passed-in material
bool GetValueFromMaterial(const char *pMaterialName, const char *pKey,
                          char *pValue, int len);

// Gets a keyvalue from a *patched* material
bool GetValueFromPatchedMaterial(const char *pMaterialName, const char *pKey,
                                 char *pValue, int len);

const char *GetOriginalMaterialNameForPatchedMaterial(
    const char *pPatchMaterialName);

MaterialSystemMaterial_t FindOriginalMaterial(const char *materialName,
                                              bool *pFound,
                                              bool bComplain = true);

bool DoesMaterialHaveKeyValuePair(const char *pMaterialName,
                                  const char *pKeyName,
                                  const char *pSearchValue);
bool DoesMaterialHaveKey(const char *pMaterialName, const char *pKeyName);

enum LoadMaterialKeyValuesFlags_t {
    LOAD_MATERIAL_KEY_VALUES_FLAGS_EXPAND_PATCH = 1,
};

KeyValues *LoadMaterialKeyValues(const char *pMaterialName,
                                 unsigned int nFlags);
void WriteMaterialKeyValuesToPak(const char *pMaterialName, KeyValues *kv);

#endif  // MATERIALPATCH_H