/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: ConsoleTTY.hpp
    Date: 2022-5-11
    Author: Reece
***/
#pragma once

namespace Aurora::Console::ConsoleTTY
{
    inline bool gTTYConsoleEnabled {};

    void EnterScrollMode();
    void LeaveScrollMode();

    struct TTYConsole;

    struct TTYConsoleField
    {
        TTYConsoleField(TTYConsole *pParent);

        AuString inputField;
        int noncanonicalCursorPos {};
        int noncanonicalCursorPosInBytes {};

        void AddString(const AuString &str);
        bool Backspace();
        void DirectionalArrow(int iDirection, bool bShift, bool bControl);
        void Clear();
        void WriteBuffered(TTYConsole *pConsole, AuPair<AuUInt32, AuUInt32> pos);

        AuOptionalEx<int> highlightStartInBytes {};
        AuOptionalEx<int> highlightStart {};
        AuOptionalEx<int> highlightEndInBytes {};
        AuOptionalEx<int> highlightEndInPos {};
        int highlightChars {};

        void DoUnselectTick();

    private:

        void Left();
        void Right();

        TTYConsole *pParent;
        bool bIsSelecting {};
        int iLastDirection {};
    };

    struct TTYConsole : ITTYConsole
    {
        TTYConsole();

        void BufferMessage(const AuConsole::ConsoleMessage &msg) override;
        void BufferMessage(const AuConsole::ConsoleMessage &msg, const AuString &input) ;
        
        // 
        void Pump();
        void PumpHistory();

        bool RedrawWindow();
        void OnEnter();
        void Init();
        void Deinit();

        bool Start() override;
        void End() override;
        
        bool uxModeFlipped {};
        AuUInt64 uxFlipTime {};

        inline void SignalRedraw()
        {
            this->bTriggerRedraw = true;
        }

    private:

        bool UTF8();

        void SetHintStrings(const AuList<AuPair<AuString /*autocompletion*/, AuList<AuString/* secondary hint*/>>> &hints);

        void RedrawBorders();
        void RedrawLogBox();
        void RedrawHintLine();
        void RedrawInput(bool clear);
        void RedrawBanner();

        void BlankLogBox();

        void SetInitialCursorPos();

        bool CheckRedraw();
        void PostRedraw(bool first);

        bool RegenerateBuffer(bool resChanged, bool &redrawBox);

        bool NoncanonicalMode() override;
        void NoncanonicalTick();
        void NoncanonicalSetCursor();
        void NoncanonicalOnString(const AuString &input);
        void NoncanonicalOnBackspace();
        void NoncanonicalOnEnter();
        void NoncanonicalOnLeft(bool bShift, bool bControl);
        void NoncanonicalOnRight(bool bShift, bool bControl);

        void NoncanonicalOnPageUp();
        void NoncanonicalOnPageDown();

        void Scroll(int delta);

        void NoncanonicalOnMenuLeft();
        void NoncanonicalOnMenuRight();
        void NoncanonicalOnMenuUp();
        void NoncanonicalOnMenuDown();

        void NoncanonicalOnHistoryUp();
        void NoncanonicalOnHistoryDown();

        void HistorySetFile();
        AuString HistoryGetFile();
        void HistoryAppendChanges();
        void HistoryLoad();
        void HistoryUpdateCursor();

        AuString historyFileName;

        TTYConsoleField inputField;
        //int noncanonicalCursorPos {};
        //int noncanonicalCursorPosInBytes {};

        virtual int GetBannerLines();
        virtual int GetLogBoxLines();
        virtual int GetHintLines();
        virtual int GetTextInputLines();

        virtual bool GetLogBoxHintBorder();
        virtual bool GetBottomBorder() override;

        AuPair<AuUInt32, AuUInt32> GetLogBoxStart();

        AuPair<AuUInt32, AuUInt32> GetHintLine();
        AuPair<AuUInt32, AuUInt32> GetInputCursor();
        AuPair<AuUInt32, AuUInt32> GetInitialInputLine();


        virtual bool GetBannerFootBorder() override;

        virtual ETTYAlign SetTitleAlignment(ETTYAlign newValue) override;
        virtual ETTYAlign GetLogBoxTitleAlignment() override;
        virtual ETTYAlign SetLogBoxTitleAlignment(ETTYAlign newValue) override;

        virtual bool GetTopBorder() override;
        virtual bool GetLeftBorder() override;
        virtual bool GetRightBorder() override;

        virtual ETTYAlign GetTitleAlignment() override;

        virtual ETTYAlign GetHeaderAlignment() override;
        virtual ETTYAlign GetSubheaderAlignment() override;

        virtual AuString GetHeaderBorderTitle() override;
        virtual AuString GetLogBoxBorderTitle() override;

        virtual AuString GetHeader() override;
        virtual AuString GetSubHeader() override;

        virtual ETTYAlign SetHeaderAlignment(ETTYAlign newValue) override;
        virtual ETTYAlign SetSubheaderAlignment(ETTYAlign newValue) override;

        virtual AuString SetHeaderBorderTitle(const AuString &newValue) override;
        virtual AuString SetLogBoxBorderTitle(const AuString &newValue) override;

        virtual AuString SetHeader(const AuString &newValue) override;
        virtual AuString SetSubHeader(const AuString &newValue) override;

        virtual bool SetTopBorder(bool newValue) override;
        virtual bool SetLeftBorder(bool newValue) override;
        virtual bool SetRightBorder(bool newValue) override;

        virtual AuUInt8 SetPaddingLeftOfLog(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingRightOfLog(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingLeftOfInput(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingTopOfInput(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingTopOfHint(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingTopOfHeader(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingMidOfHeader(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingBottomOfSubheader(AuUInt8 newValue) override;

        virtual AuUInt8 GetPaddingLeftOfLog() override;
        virtual AuUInt8 GetPaddingRightOfLog() override;
        virtual AuUInt8 GetPaddingLeftOfInput() override;
        virtual AuUInt8 GetPaddingTopOfInput() override;
        virtual AuUInt8 GetPaddingTopOfHint() override;
        virtual AuUInt8 GetPaddingTopOfHeader() override;
        virtual AuUInt8 GetPaddingMidOfHeader() override;
        virtual AuUInt8 GetPaddingBottomOfSubheader() override;


        virtual AuUInt8 SetPaddingHeadOfLog(AuUInt8 newValue) override;
        virtual AuUInt8 SetPaddingTopOfLog(AuUInt8 newValue) override;
        virtual AuUInt8 GetPaddingHeadOfLog() override;
        virtual AuUInt8 GetPaddingTopOfLog() override;
        
        void WriteBufferedEx(AuPair<AuUInt32, AuUInt32> pos, EAnsiColor color, const AuString &in);
        void WriteBuffered(AuPair<AuUInt32, AuUInt32> pos, const AuString &in);
        void WriteLine(int Y, const AuString &in);
        void BlankLine(int Y, bool borders = true);
        void BlankBordersLine(int Y);

        bool PermitDoubleBuffering();
        
    private:

        friend struct TTYConsoleField;
        void DebugLogArea();

        AuList<AuPair<AuString /*autocompletion*/, AuList<AuString/* secondary hint*/>>> hintStrings;

        void Flush();

        int currentWidth {};
        int currentHeight {};

        int oldWidth {};
        int oldHeight {};

        int iHistoryPos {-1};
        int iHistoryWritePos {0};
        AuList<AuString> history;

        AuRWLock historyLock;


        AuMutex messageLock;
        AuList<AuConsole::ConsoleMessage> messagesPending;

        AuList<AuConsole::ConsoleMessage> messages;
        AuList<AuPair<AuConsole::EAnsiColor, AuString>> screenBuffer;
        bool bScreenBufferDoesntMap {};

        int iScrollPos { -1 };

        AuPair<AuUInt32, AuUInt32> cursorPos;


        struct AlignedString
        {
            AuString str;
            ETTYAlign align {};
        };

        AuString tempMemory;

        const AuString &Stringify(const AuString &referenceLine, const AlignedString &string, bool spacing, bool brackets, bool extraPadding);


        AlignedString header;
        AlignedString subheader;

        AlignedString headerTitle;
        AlignedString logTitle;


        bool bTriggerRedraw {};

        bool bRightBorder {true};
        bool bLeftBorder {true};
        bool bTopBorder {true};

        bool bShouldShowBorders {};
        bool bShowingBorders {};


        bool IsShowingHintLine();
        bool bIsShowingHintLine;

        bool IsWin32UxMode();
        void UXModeFlip();
        void UXModeStart();

        //AuString inputField {};

        AuUInt32 lastInputHash  {};
        AuUInt32 lastBorderHash {};

        int leftPadding {1};
        int rightPadding {1};
        
        int leftLogPadding {1};
        int rightLogPadding {1};
        int topLogPadding {0}; // extra padding, if displaying header ...
        int topLogPaddingExtra {1}; // this is backwards ...
        
        int leftInputPadding {0};
        int topInputPadding {0};
        
        int topHintPadding {0};
        int topHeaderPadding {0};
        int midHeaderPadding {0};
        
        int bottomSubHeaderPadding {0};

        AuUInt32 oldCP {};

    };


    inline TTYConsole gTTYConsole;

    void Init();
    void Pump();
    void Exit();
    void OnEnter();
    void WriteTTYOut(const AuConsole::ConsoleMessage &msg);
    void WriteTTYOut(const AuConsole::ConsoleMessage &msg, const AuString &input);
    AUKN_SYM AuSPtr<ITTYConsole> GetTTYConsole();
    void PumpForce();
}