/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
// Original file Copyright Crytek GMBH or its affiliates, used under license.

#pragma once

#include "ILevelSystem.h"

namespace LegacyLevelSystem
{

class CLevelInfo
    : public ILevelInfo
{
    friend class CLevelSystem;
public:
    CLevelInfo()
        : m_heightmapSize(0)
        , m_bMetaDataRead(false)
        , m_isModLevel(false)
        , m_scanTag(ILevelSystem::TAG_UNKNOWN)
        , m_levelTag(ILevelSystem::TAG_UNKNOWN)
    {
        SwapEndian(m_scanTag, eBigEndian);
        SwapEndian(m_levelTag, eBigEndian);
    };

    // ILevelInfo
    virtual const char* GetName() const { return m_levelName.c_str(); };
    virtual const bool IsOfType(const char* sType) const;
    virtual const char* GetPath() const { return m_levelPath.c_str(); };
    virtual const char* GetPaks() const { return m_levelPaks.c_str(); };
    virtual bool GetIsModLevel() const { return m_isModLevel; }
    virtual const uint32 GetScanTag() const { return m_scanTag; }
    virtual const uint32 GetLevelTag() const { return m_levelTag; }
    virtual const char* GetDisplayName() const;
    virtual const char* GetPreviewImagePath() const { return m_previewImagePath.c_str(); }
    virtual const char* GetBackgroundImagePath() const { return m_backgroundImagePath.c_str(); }
    virtual const char* GetMinimapImagePath() const {return m_minimapImagePath.c_str(); }
    //virtual const ILevelInfo::TStringVec& GetMusicLibs() const { return m_musicLibs; }; // Gets reintroduced when level specific music data loading is implemented.
    virtual int GetHeightmapSize() const { return m_heightmapSize; };
    virtual const bool MetadataLoaded() const { return m_bMetaDataRead; }

    virtual int GetGameTypeCount() const { return m_gameTypes.size(); };
    virtual const ILevelInfo::TGameTypeInfo* GetGameType(int gameType) const { return &m_gameTypes[gameType]; };
    virtual bool SupportsGameType(const char* gameTypeName) const;
    virtual const ILevelInfo::TGameTypeInfo* GetDefaultGameType() const;
    virtual bool HasGameRules() const{ return !m_gamerules.empty(); }

    virtual const ILevelInfo::SMinimapInfo& GetMinimapInfo() const { return m_minimapInfo; }

    virtual const char* GetDefaultGameRules() const{ return m_gamerules.empty() ? NULL : m_gamerules[0].c_str(); }
    virtual ILevelInfo::TStringVec GetGameRules() const{ return m_gamerules; }
    // ~ILevelInfo


    void GetMemoryUsage(ICrySizer*) const;

private:
    void ReadMetaData();
    bool ReadInfo();

    bool OpenLevelPak();
    void CloseLevelPak();

    string              m_levelName;
    string              m_levelPath;
    string              m_levelPaks;
    string              m_levelDisplayName;
    string              m_previewImagePath;
    string              m_backgroundImagePath;
    string              m_minimapImagePath;

    string              m_levelPakFullPath;
    string              m_levelMMPakFullPath;

    TStringVec          m_gamerules;
    int                 m_heightmapSize;
    uint32              m_scanTag;
    uint32              m_levelTag;
    bool                m_bMetaDataRead;
    std::vector<ILevelInfo::TGameTypeInfo> m_gameTypes;
    bool                m_isModLevel;
    SMinimapInfo        m_minimapInfo;

    DynArray<string>    m_levelTypeList;
};

class CLevel
    : public ILevel
{
    friend class CLevelSystem;
public:
    CLevel() {}
    virtual ~CLevel() = default;

    virtual void Release() { delete this; }

    virtual ILevelInfo* GetLevelInfo() { return &m_levelInfo; }

private:
    CLevelInfo m_levelInfo;
};

class CLevelSystem
    : public ILevelSystem
{
public:
    CLevelSystem(ISystem* pSystem, const char* levelsFolder);
    virtual ~CLevelSystem();

    void Release() { delete this; };

    // ILevelSystem
    virtual DynArray<string>* GetLevelTypeList();
    virtual void Rescan(const char* levelsFolder, const uint32 tag);
    virtual int GetLevelCount();
    virtual ILevelInfo* GetLevelInfo(int level);
    virtual ILevelInfo* GetLevelInfo(const char* levelName);

    virtual void AddListener(ILevelSystemListener* pListener);
    virtual void RemoveListener(ILevelSystemListener* pListener);

    virtual ILevel* GetCurrentLevel() const { return m_pCurrentLevel;   }
    virtual ILevel* LoadLevel(const char* levelName);
    virtual void UnLoadLevel();
    virtual ILevel* SetEditorLoadedLevel(const char* levelName, bool bReadLevelInfoMetaData = false);
    virtual void PrepareNextLevel(const char* levelName);
    virtual float GetLastLevelLoadTime() { return m_fLastLevelLoadTime; };
    virtual bool IsLevelLoaded() { return m_bLevelLoaded; }

    // If the level load failed then we need to have a different shutdown procedure vs when a level is naturally unloaded
    virtual void SetLevelLoadFailed(bool loadFailed) { m_levelLoadFailed = loadFailed; }
    virtual bool GetLevelLoadFailed() { return m_levelLoadFailed; }

    // ~ILevelSystem

    void PrecacheLevelRenderData();
    void GetMemoryUsage(ICrySizer* s) const;

    void SaveOpenedFilesList();

private:

    ILevel* LoadLevelInternal(const char* _levelName);

    // ILevelSystemListener events notification
    void OnLevelNotFound(const char* levelName);
    void OnLoadingStart(ILevelInfo* pLevel);
    void OnLoadingLevelEntitiesStart(ILevelInfo* pLevelInfo);
    void OnLoadingComplete(ILevel* pLevel);
    void OnLoadingError(ILevelInfo* pLevel, const char* error);
    void OnLoadingProgress(ILevelInfo* pLevel, int progressAmount);
    void OnUnloadComplete(ILevel* pLevel);

    // lowercase string and replace backslashes with forward slashes
    // TODO: move this to a more general place in CryEngine
    string& UnifyName(string& name);
    void ScanFolder(const char* subfolder, bool modFolder, const uint32 tag);
    void PopulateLevels(string searchPattern, string& folder, ICryPak* pPak, bool& modFolder, const uint32& tag, bool fromFileSystemOnly);
    void LogLoadingTime();
    bool LoadLevelInfo(CLevelInfo& levelInfo);

    // internal get functions for the level infos ... they preserve the type and don't
    // directly cast to the interface
    CLevelInfo* GetLevelInfoInternal(int level);
    CLevelInfo* GetLevelInfoInternal(const char* levelName);

    ISystem* m_pSystem;
    std::vector<CLevelInfo> m_levelInfos;
    string                  m_levelsFolder;
    ILevel* m_pCurrentLevel;
    ILevelInfo* m_pLoadingLevelInfo;

    string                  m_lastLevelName;
    float                   m_fLastLevelLoadTime;
    float                   m_fFilteredProgress;
    float                   m_fLastTime;

    bool                    m_bLevelLoaded;
    bool                    m_bRecordingFileOpens;
    bool                    m_levelLoadFailed = false;

    int                     m_nLoadedLevelsCount;

    CTimeValue              m_levelLoadStartTime;

    static int              s_loadCount;

    std::vector<ILevelSystemListener*> m_listeners;

    DynArray<string>        m_levelTypeList;
};

} // namespace LegacyLevelSystem