/******************************************************************************
**  libDXFrw - Library to read/write DXF files (ascii & binary)              **
**                                                                           **
**  Copyright (C) 2011-2015 José F. Soriano, rallazz@gmail.com               **
**                                                                           **
**  This library is free software, licensed under the terms of the GNU       **
**  General Public License as published by the Free Software Foundation,     **
**  either version 2 of the License, or (at your option) any later version.  **
**  You should have received a copy of the GNU General Public License        **
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.    **
******************************************************************************/

#ifndef DRW_BASE_H
#define DRW_BASE_H

#define DRW_VERSION "0.6.3"

#include <string>
#include <list>
#include <cmath>
#include <QtGlobal>
#include <ciso646>

#ifdef DRW_ASSERTS
# define drw_assert(a) assert(a)
#else
# define drw_assert(a)
#endif

#define UTF8STRING std::string
#define DRW_UNUSED(x) (void)x

#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__)
#  define DRW_WIN
#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
#    define DRW_WIN
#elif defined(__MWERKS__) && defined(__INTEL__)
#  define DRW_WIN
#else
#  define DRW_POSIX
#endif

#ifndef M_PI
 #define M_PI       3.141592653589793238462643
#endif
#ifndef M_PI_2
 #define M_PI_2       1.57079632679489661923
#endif
#define M_PIx2      6.283185307179586 // 2*PI
#define ARAD 57.29577951308232

#ifndef __has_cpp_attribute
# define __has_cpp_attribute(x) 0
#endif

#if QT_VERSION < QT_VERSION_CHECK(5, 8, 0)

#ifndef QT_HAS_CPP_ATTRIBUTE
#ifdef __has_cpp_attribute
#  define QT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
#else
#  define QT_HAS_CPP_ATTRIBUTE(x) 0
#endif
#endif // QT_HAS_CPP_ATTRIBUTE

#if defined(__cplusplus)
#if QT_HAS_CPP_ATTRIBUTE(clang::fallthrough)
#    define Q_FALLTHROUGH() [[clang::fallthrough]]
#elif QT_HAS_CPP_ATTRIBUTE(gnu::fallthrough)
#    define Q_FALLTHROUGH() [[gnu::fallthrough]]
#elif QT_HAS_CPP_ATTRIBUTE(fallthrough)
#  define Q_FALLTHROUGH() [[fallthrough]]
#endif
#endif
#ifndef Q_FALLTHROUGH
#  if (defined(Q_CC_GNU) && Q_CC_GNU >= 700) && !defined(Q_CC_INTEL)
#    define Q_FALLTHROUGH() __attribute__((fallthrough))
#  else
#    define Q_FALLTHROUGH() (void)0
#endif
#endif // defined(__cplusplus)
#endif // QT_VERSION < QT_VERSION_CHECK(5, 8, 0)

typedef signed char dint8;              /* 8 bit signed */
typedef signed short dint16;            /* 16 bit signed */
typedef signed int dint32;              /* 32 bit signed */
typedef long long int dint64;           /* 64 bit signed */

typedef unsigned char duint8;           /* 8 bit unsigned */
typedef unsigned short duint16;         /* 16 bit unsigned */
typedef unsigned int duint32;           /* 32 bit unsigned */
typedef unsigned long long int duint64; /* 64 bit unsigned */

typedef float dfloat32;                 /* 32 bit floating point */
typedef double ddouble64;               /* 64 bit floating point */
typedef long double ddouble80;          /* 80 bit floating point */


namespace DRW {

//! Version numbers for the DXF Format.
enum Version {
    UNKNOWNV,     /*!< UNKNOWN VERSION. */
    AC1006,       /*!< R10. */
    AC1009,       /*!< R11 & R12. */
    AC1012,       /*!< R13. */
    AC1014,       /*!< R14. */
    AC1015,       /*!< ACAD 2000. */
    AC1018,       /*!< ACAD 2004. */
    AC1021,       /*!< ACAD 2007. */
    AC1024,       /*!< ACAD 2010. */
    AC1027        /*!< ACAD 2013. */
};

enum error {
BAD_NONE,             /*!< No error. */
BAD_UNKNOWN,          /*!< UNKNOWN. */
BAD_OPEN,             /*!< error opening file. */
BAD_VERSION,          /*!< unsupported version. */
BAD_READ_METADATA,    /*!< error reading matadata. */
BAD_READ_FILE_HEADER, /*!< error in file header read process. */
BAD_READ_HEADER,      /*!< error in header vars read process. */
BAD_READ_HANDLES,     /*!< error in object map read process. */
BAD_READ_CLASSES,     /*!< error in classes read process. */
BAD_READ_TABLES,      /*!< error in tables read process. */
BAD_READ_BLOCKS,      /*!< error in block read process. */
BAD_READ_ENTITIES,    /*!< error in entities read process. */
BAD_READ_OBJECTS      /*!< error in objects read process. */
};

enum DBG_LEVEL {
    NONE,
    DEBUG
};

//! Special codes for colors
enum ColorCodes {
    black = 250,
    green = 3,
    red = 1,
    brown = 15,
    yellow = 2,
    cyan = 4,
    magenta = 6,
    gray = 8,
    blue = 5,
    l_blue = 163,
    l_green = 121,
    l_cyan = 131,
    l_red = 23,
    l_magenta = 221,
    l_gray = 252,
    white = 7,
    ColorByLayer = 256,
    ColorByBlock = 0
};

//! Spaces
enum Space {
    ModelSpace = 0,
    PaperSpace = 1
};

//! Special kinds of handles
enum HandleCodes {
    NoHandle = 0
};

//! Shadow mode
enum ShadowMode {
    CastAndReceieveShadows = 0,
    CastShadows = 1,
    ReceiveShadows = 2,
    IgnoreShadows = 3
};

//! Special kinds of materials
enum MaterialCodes {
    MaterialByLayer = 0
};

//! Special kinds of plot styles
enum PlotStyleCodes {
    DefaultPlotStyle = 0
};

//! Special kinds of transparencies
enum TransparencyCodes {
    Opaque = 0,
    Transparent = -1
};

} // namespace DRW

Q_REQUIRED_RESULT static inline bool DRW_FuzzyComparePossibleNulls(double p1, double p2);
static inline bool DRW_FuzzyComparePossibleNulls(double p1, double p2)
{
    if(qFuzzyIsNull(p1))
    {
        return qFuzzyIsNull(p2);
    }
    else if(qFuzzyIsNull(p2))
    {
        return false;
    }
    else
    {
        return qFuzzyCompare(p1, p2);
    }
}

//! Class to handle 3D coordinate point
/*!
*  Class to handle 3D coordinate point
*  @author Rallaz
*/
class DRW_Coord {
public:
    DRW_Coord() = default;
    DRW_Coord(double ix, double iy, double iz)
        : x(ix),
          y(iy),
          z(iz)
    {}

    DRW_Coord(const DRW_Coord &data)
        : x(data.x),
          y(data.y),
          z(data.z)
    {}

    DRW_Coord &operator = (const DRW_Coord& data)
    {
        if ( &data == this )
        {
            return *this;
        }

        x = data.x;
        y = data.y;
        z = data.z;
        return *this;
    }
/*!< convert to unitary vector */
    void unitize(){
        double dist;
        dist = sqrt(x*x + y*y + z*z);
        if (dist > 0.0) {
            x= x/dist;
            y= y/dist;
            z= z/dist;
        }
    }

public:
    double x {0};
    double y {0};
    double z {0};
};


//! Class to handle vertex
/*!
*  Class to handle vertex for lwpolyline entity
*  @author Rallaz
*/
class DRW_Vertex2D {
public:
    DRW_Vertex2D()
        : x(),
          y(),
          stawidth(0),
          endwidth(0),
          bulge(0)
    {
//        eType = DRW::LWPOLYLINE;
    }
    DRW_Vertex2D(double sx, double sy, double b = 0.0)
        : x(sx),
          y(sy),
          stawidth(0),
          endwidth(0),
          bulge(b)
    {}

public:
    double x;                 /*!< x coordinate, code 10 */
    double y;                 /*!< y coordinate, code 20 */
    double stawidth;          /*!< Start width, code 40 */
    double endwidth;          /*!< End width, code 41 */
    double bulge;             /*!< bulge, code 42 */
};


//! Class to handle header vars
/*!
*  Class to handle header vars
*  @author Rallaz
*/
class DRW_Variant {
public:
    enum TYPE {
        STRING,
        INTEGER,
        DOUBLE,
        COORD,
        INVALID
    };
//TODO: add INT64 support
    DRW_Variant()
        : content(),
          type(INVALID),
          code(),
          sdata(),
          vdata()
    {}

    DRW_Variant(int c, dint32 i)
        : content(),
          type(),
          code(c),
          sdata(),
          vdata()
    {
        addInt(i);
    }

    DRW_Variant(int c, duint32 i)
        : content(),
          type(),
          code(c),
          sdata(),
          vdata()
    {
        addInt(static_cast<dint32>(i));//RLZ: verify if work with big numbers
    }

    DRW_Variant(int c, double d)
        : content(),
          type(),
          code(c),
          sdata(),
          vdata()
    {
        addDouble(d);
    }

    DRW_Variant(int c, const UTF8STRING &s)
        : content(),
          type(),
          code(c),
          sdata(),
          vdata()
    {
        addString(s);
    }

    DRW_Variant(int c, const DRW_Coord &crd)
        : content(),
          type(),
          code(c),
          sdata(),
          vdata()
    {
        addCoord(crd);
    }

    DRW_Variant(const DRW_Variant& d)
        : content(d.content),
          type(d.type),
          code(d.code),
          sdata(),
          vdata()
    {
        if (d.type == COORD)
        {
            vdata = d.vdata;
            content.v = &vdata;
        }

        if (d.type == STRING)
        {
            sdata = d.sdata;
            content.s = &sdata;
        }
    }

    ~DRW_Variant() = default;

    void addString(const UTF8STRING &s) {setType(STRING); sdata = s; content.s = &sdata;}
    void addInt(int i) {setType(INTEGER); content.i = i;}
    void addDouble(double d) {setType(DOUBLE); content.d = d;}
    void addCoord() {setType(COORD); vdata.x=0.0; vdata.y=0.0; vdata.z=0.0; content.v = &vdata;}
    void addCoord(const DRW_Coord &v) {setType(COORD); vdata = v; content.v = &vdata;}
    void setType(enum TYPE t) { type = t;}
    void setCoordX(double d) { if (type == COORD) vdata.x = d;}
    void setCoordY(double d) { if (type == COORD) vdata.y = d;}
    void setCoordZ(double d) { if (type == COORD) vdata.z = d;}

private:
    typedef union {
        UTF8STRING *s;
        dint32 i;
        double d;
        DRW_Coord *v;
    } DRW_VarContent;

public:
    DRW_VarContent content;
    enum TYPE type;
    int code;            /*!< dxf code of this value*/

private:
    DRW_Variant &operator=(const DRW_Variant &) Q_DECL_EQ_DELETE;
    std::string sdata;
    DRW_Coord vdata;
};

//! Class to convert between line width and integer
/*!
*  Class to convert between line width and integer
*  verifing valid values, if value is not valid
*  returns widthDefault.
*  @author Rallaz
*/
class DRW_LW_Conv{
public:
    enum lineWidth {
        width00 = 0,       /*!< 0.00mm (dxf 0)*/
        width01 = 1,       /*!< 0.05mm (dxf 5)*/
        width02 = 2,       /*!< 0.09mm (dxf 9)*/
        width03 = 3,       /*!< 0.13mm (dxf 13)*/
        width04 = 4,       /*!< 0.15mm (dxf 15)*/
        width05 = 5,       /*!< 0.18mm (dxf 18)*/
        width06 = 6,       /*!< 0.20mm (dxf 20)*/
        width07 = 7,       /*!< 0.25mm (dxf 25)*/
        width08 = 8,       /*!< 0.30mm (dxf 30)*/
        width09 = 9,       /*!< 0.35mm (dxf 35)*/
        width10 = 10,      /*!< 0.40mm (dxf 40)*/
        width11 = 11,      /*!< 0.50mm (dxf 50)*/
        width12 = 12,      /*!< 0.53mm (dxf 53)*/
        width13 = 13,      /*!< 0.60mm (dxf 60)*/
        width14 = 14,      /*!< 0.70mm (dxf 70)*/
        width15 = 15,      /*!< 0.80mm (dxf 80)*/
        width16 = 16,      /*!< 0.90mm (dxf 90)*/
        width17 = 17,      /*!< 1.00mm (dxf 100)*/
        width18 = 18,      /*!< 1.06mm (dxf 106)*/
        width19 = 19,      /*!< 1.20mm (dxf 120)*/
        width20 = 20,      /*!< 1.40mm (dxf 140)*/
        width21 = 21,      /*!< 1.58mm (dxf 158)*/
        width22 = 22,      /*!< 2.00mm (dxf 200)*/
        width23 = 23,      /*!< 2.11mm (dxf 211)*/
        widthByLayer = 29, /*!< by layer (dxf -1) */
        widthByBlock = 30, /*!< by block (dxf -2) */
        widthDefault = 31  /*!< by default (dxf -3) */
    };

    static int lineWidth2dxfInt(enum lineWidth lw){
        switch (lw){
        case widthByLayer:
            return -1;
        case widthByBlock:
            return -2;
        case widthDefault:
            return -3;
        case width00:
            return 0;
        case width01:
            return 5;
        case width02:
            return 9;
        case width03:
            return 13;
        case width04:
            return 15;
        case width05:
            return 18;
        case width06:
            return 20;
        case width07:
            return 25;
        case width08:
            return 30;
        case width09:
            return 35;
        case width10:
            return 40;
        case width11:
            return 50;
        case width12:
            return 53;
        case width13:
            return 60;
        case width14:
            return 70;
        case width15:
            return 80;
        case width16:
            return 90;
        case width17:
            return 100;
        case width18:
            return 106;
        case width19:
            return 120;
        case width20:
            return 140;
        case width21:
            return 158;
        case width22:
            return 200;
        case width23:
            return 211;
        default:
            break;
        }
        return -3;
    }

    static enum lineWidth dxfInt2lineWidth(int i){
        if (i<0) {
            if (i==-1)
                return widthByLayer;
            else if (i==-2)
                return widthByBlock;
            else if (i==-3)
                return widthDefault;
        } else if (i<3) {
            return width00;
        } else if (i<7) {
            return width01;
        } else if (i<11) {
            return width02;
        } else if (i<14) {
            return width03;
        } else if (i<16) {
            return width04;
        } else if (i<19) {
            return width05;
        } else if (i<22) {
            return width06;
        } else if (i<27) {
            return width07;
        } else if (i<32) {
            return width08;
        } else if (i<37) {
            return width09;
        } else if (i<45) {
            return width10;
        } else if (i<52) {
            return width11;
        } else if (i<57) {
            return width12;
        } else if (i<65) {
            return width13;
        } else if (i<75) {
            return width14;
        } else if (i<85) {
            return width15;
        } else if (i<95) {
            return width16;
        } else if (i<103) {
            return width17;
        } else if (i<112) {
            return width18;
        } else if (i<130) {
            return width19;
        } else if (i<149) {
            return width20;
        } else if (i<180) {
            return width21;
        } else if (i<205) {
            return width22;
        } else {
            return width23;
        }
        //default by default
        return widthDefault;
    }
};

#endif

// EOF