/**
 * =========================================================================
 * File        : CConsole.h
 * Project     : 0 A.D.
 * Description : Implements the in-game console with scripting support.
 * =========================================================================
 */

#include <stdarg.h>
#include <string>
#include <deque>
#include <map>

#include "CStr.h"

#include "lib/input.h"

#ifndef INCLUDED_CCONSOLE
#define INCLUDED_CCONSOLE

#define CONSOLE_BUFFER_SIZE 1024 // for text being typed into the console
#define CONSOLE_MESSAGE_SIZE 1024 // for messages being printed into the console

struct JSObject;

typedef void(*fptr)(void);

class CConsole
{
private:
    float m_fX;
    float m_fY;

    float m_fHeight;
    float m_fWidth;

    // "position" in show/hide animation, how visible the console is (0..1).
    // allows implementing other animations than sliding, e.g. fading in/out.
    float m_fVisibleFrac;
    
    CStrW m_helpText;
    std::map<std::wstring, fptr> m_mapFuncList;

    std::deque<std::wstring> m_deqMsgHistory;
    std::deque<std::wstring> m_deqBufHistory;

    int m_iMsgHistPos;

    wchar_t* m_szBuffer;
    int m_iBufferPos;
    int m_iBufferLength;

    CStr m_sHistoryFile;
    int m_MaxHistoryLines;

    bool m_bFocus;
    bool m_bVisible;    // console is to be drawn
    bool m_bToggle;     // show/hide animation is currently active

    void ToLower(wchar_t* szMessage, uint iSize = 0);
    void Trim(wchar_t* szMessage, const wchar_t cChar = 32, uint iSize = 0);

    void DrawHistory(void);
    void DrawWindow(void);
    void DrawBuffer(void);
    void DrawCursor(void);

    bool IsEOB(void) {return (m_iBufferPos == m_iBufferLength);}; //Is end of Buffer?
    bool IsBOB(void) {return (m_iBufferPos == 0);}; //Is beginning of Buffer?
    bool IsFull(void) {return (m_iBufferLength == CONSOLE_BUFFER_SIZE);};
    bool IsEmpty(void) {return (m_iBufferLength == 0);};

    void InsertBuffer(void){InsertMessage(L"%ls", m_szBuffer);};
    void ProcessBuffer(const wchar_t* szLine);

    // Insert message without printf-style formatting, and without
    // length limits
    void InsertMessageRaw(const CStrW& message);

    void LoadHistory();
    void SaveHistory();
    
    JSObject* m_ScriptObject; // to run scripts in, so they can define variables that are retained between commands

public:
    CConsole();
    ~CConsole();

    void SetSize(float X = 300, float Y = 0, float W = 800, float H = 600);
    void UpdateScreenSize(int w, int h);

    void ToggleVisible();
    void SetVisible( bool visible );

    void Update(float DeltaTime);

    void Render();

    void InsertMessage(const wchar_t* szMessage, ...);
    void InsertChar(const int szChar, const wchar_t cooked);

    void SendChatMessage(const wchar_t *szMessage);
    void ReceivedChatMessage(const wchar_t *pSender, const wchar_t *szMessage);

    void SetBuffer(const wchar_t* szMessage, ...);

    void UseHistoryFile( const CStr& filename, int historysize );

    // Only returns a pointer to the buffer; copy out of here if you want to keep it.
    const wchar_t* GetBuffer();
    void FlushBuffer();

    void RegisterFunc(fptr F, const wchar_t* szName);

    bool IsActive() { return m_bVisible; }

    int m_iFontHeight;
    int m_iFontWidth;
    int m_iFontOffset; // distance to move up before drawing
    size_t m_charsPerPage;
};

extern CConsole* g_Console;

extern InReaction conInputHandler(const SDL_Event_* ev);

#endif