#include "modgmt_func.h"

static double AutoStep(double b, double e)
{
 double n=pow(10.0,ceil(log10(e-b)-1.0));
 double steps[]={0.5,1,2,5,10,0};
 double div=0.0;
 uint i=0;

 do if((e-b)*steps[i]/n<10.0) div=n/steps[i]; while(0.0!=steps[++i]);
 return div;
}

const ObjectBase* GMT_Header(const ObjectList* input)
{
 return new ObjectString(header);
}

const ObjectBase* GMT_Footer(const ObjectList* input)
{
 return new ObjectString(footer);
}

const ObjectBase* GMT_Datadir(const ObjectList* input)
{
 return new ObjectString(datadir);
}

const ObjectBase* GMT_ColorGray(const ObjectList* input)
{
 struct gmt_color c;
 RPosPar<Base2RGB> g("gray");
 OPosPar<Base2TransD> t("transparency",0.0);

 ParsePositionalParameters params(input,g,t);
 if(!params) return new ObjectError("ColorGray",params.Error());

 c.model=gmt_color::GRAY;
 c.gray=g; c.transparency=t;

 return new ObjectGMTColor(c);
}

const ObjectBase* GMT_ColorRGB(const ObjectList* input)
{
 struct gmt_color c;

 RPosPar<Base2RGB> r("red"),g("green"),b("blue");
 OPosPar<Base2TransD> t("transparency",0.0);

 ParsePositionalParameters params(input,r,g,b,t);
 if(!params) return new ObjectError("ColorRGB",params.Error());

 c.model=gmt_color::RGB;
 c.r=r; c.g=g; c.b=b; c.transparency=t;

 return new ObjectGMTColor(c);
}

const ObjectBase* GMT_ColorHSV(const ObjectList* input)
{
 struct gmt_color c;

 RPosPar<Base2Hue> h("hue");
 RPosPar<Base2SV> s("saturation"), v("value");
 OPosPar<Base2TransD> t("transparency",0.0);

 ParsePositionalParameters params(input,h,s,v,t);
 if(!params) return new ObjectError("ColorHSV",params.Error());

 c.model=gmt_color::HSV;
 c.hue=h; c.saturation=s; c.value=v; c.transparency=t;

 return new ObjectGMTColor(c);
}

const ObjectBase* GMT_ColorCMYK(const ObjectList* input)
{
 struct gmt_color C;

 RPosPar<Base2CMYK> c("cyan"),m("magenta"),y("yellow"),k("black");
 OPosPar<Base2TransD> t("transparency",0.0);

 ParsePositionalParameters params(input,c,m,y,k,t);
 if(!params) return new ObjectError("ColorCMYK",params.Error());

 C.model=gmt_color::CMYK;
 C.cyan=c; C.magenta=m; C.yellow=y; C.black=k; C.transparency=t;

 return new ObjectGMTColor(C);
}

// Shifting layer
/*
Input:
1) Three arguments, first is Layer, second and third are double. Interprets as new absolute position in cm.
2) Pairs list. Names are l (layer), x, y, relx (rx), rely (ry). Pair with name l may be absent, in this case search in list and using as layer object with ObjectGMTLayer type. x and y are absolute positions in cm, relx and rely are shift from current position. x (y) and relx (rely) are mutually exlusive, but x (y) and rely (relx) can be used simultaneously. If position for some axis is absent, then this position is unchanged.
*/
const ObjectBase* GMT_LayerShift(const ObjectList* input)
{
 struct gmt_layer layer;
 std::string err;

 // Case 1
 {
  RPosPar<Base2Layer> l("layer");
  OPosPar<Base2DoubleD> x("x",0.0), y("y",0.0);

  {ParsePositionalParameters params(input,l,x,y); if(!params) goto case2;} // Try case 2, if case 1 failed.
  layer=l; layer.shiftx=x; layer.shifty=y;
  return new ObjectGMTLayer(layer);
 }

 case2:
 {
  RNPar<Base2Layer> l("layer");
  ONPar<Base2Double> x("x"),y("y"),rx("r[el]x"),ry("r[el]y");

  {ParseNamedParameters params(input,l,x,y); if(!params) {err=params.Error(); goto fail;}} // Parsing error

  // Check duplicate parameters
  if(x.Exist() && rx.Exist()) {err="Only one of "+x.Name()+" or "+rx.Name()+" can be specified."; goto fail;}
  if(y.Exist() && ry.Exist()) {err="Only one of "+y.Name()+" or "+ry.Name()+" can be specified."; goto fail;}
  // Do shift
  if( x.Exist()) layer.shiftx=x;
  if( y.Exist()) layer.shifty=y;
  if(rx.Exist()) layer.shiftx+=rx;
  if(ry.Exist()) layer.shifty+=ry;
 }

 return new ObjectGMTLayer(layer);

 fail:
 return new ObjectError("LayerShift",err);
}

// Draw frame with tics
/*
Input: pairs list.
proj or projection or unnamed GMTProjection parameter - projection. This is mandatory argument.
xtics - position of tics for x axis. Can be none, up, down or both. Default is down.
ytics - position of tics for y axis. Can be none, left, right or both. Default is left.
xint - tics interval for x axis. Numerical value or word auto. Default is auto.
yint - tics interval for y axis. Numerical value or word auto. Default is auto.
domain - coordinates domain. Can be pos (0:360), neg (-360:0) or center (-180:180) (only for geographic projections). Default is pos.
mark - using letters (W, E, S, N) instead of sign for coordinates (only for geographic projections). Can be yes or no. Default is no.
font - font using for annotations. Default is 12,Times-Roman,black.
offset - distance from end of tick-mark to start of annotation in cm. Default is 0.18.
framewidth - width of frame (only for geographic projections) in cm. Default is 0.1.
framepen - pen for drawing frame. Default is 0.35,black.
ticklen - lenght of tick-marks in cm. Default is 0.18.
tickpen - pen for drawing ticks. Default is 0.3,black.
trans or transparency - transparency level, double from 0 to 100. Default is 0 (opaque).
model - transparency model, string. Choose from Color, ColorBurn, ColorDodge, Darken, Difference, Exclusion, HardLight, Hue, Lighten, Luminosity, Multiply, Normal, Overlay, Saturation, SoftLight, and Screen. Default is Normal.
rx or relx - shift layer on x cm in horisontal direction. Default is 0.
ry or rely - shift layer on y cm in vertical direction. Default is 0.
*/
template<class O>
using SConvertor=Convert2Struct<std::string, O>;
template<class O>
using DConvertor=Convert2Struct<double, O>;

const ObjectBase* GMT_DrawFrame(const ObjectList* input)
{
 struct XYIntVal // Representing intervals for tics intervals
 {
  bool isauto; double val;
  XYIntVal():isauto(true),val(0.0) {} // Default is auto
 };

 class Base2TInt // Custom convertor class for xy tics intervals
 {
  public:
  using ValueType=struct XYIntVal;

  ValueType Convert(const ObjectBase* ob, bool* res, std::string& err)
  {
   ValueType ret;
   ret.isauto=false;

   OBTypeM<SConvertor,ObjectString> sp(ob);
   OBTypeM<DConvertor,ObjectReal,ObjectInt,ObjectString> dp(ob);
   // Check string "auto"
   if(sp.Error()==OBTypeErr::OK)
   {
    std::string s=sp(res,std::ref(err));
    if(!res) {err="Unknown error"; goto fail;} // Impossible case
    tolower(s);
    if("auto"==s) {ret.isauto=true; return ret;}
   }
   // Check double value
   switch(dp.Error())
   {
    case(OBTypeErr::OK):
    {
     ret.val=dp(res,std::ref(err));
     if(ret.val<=0.0) {err="Tics interval must be greater the zero"; break;}
     return ret;
    };
    case(OBTypeErr::NULLPTR): {err="Can't convert zero ObjectBase pointer to something meaningfull"; break;}
    case(OBTypeErr::TYPEMISMATCH): {err="Can't convert "+ob->Type()+" to double: type mismatch"; break;}
   }
   fail:
   *res=false;
   return ret;
  }
 };

 std::string err,fakerr;
 std::string opts="-P -O -K ";

 struct gmt_layer layer;

 struct gmt_font deffont;
 struct gmt_pen defframepen,deftickpen;
 deffont.Convert("12,Times-Roman,black",fakerr);
 defframepen.Convert("0.35,black",fakerr);
 deftickpen.Convert("0.3,black",fakerr);

 RNFPar<Base2Proj,ObjectGMTProjection> proj("projection");
 ONPar<Base2TInt> xint("x[ ]interval"), yint("y[ ]interval");
 ONPar<Base2StringD> xtics("x[ ]tics[ ]position","down"), ytics("y[ ]t[ics[ ]position","left");
 ONPar<Base2StringD> domain("domain","pos");
 ONPar<Base2BoolD> mark("mark",false);
 ONPar<Base2FontD> font("font",deffont);
 ONPar<Base2DoubleD> offset("offset",0.18);
 ONPar<Base2NonNegD> framewidth("f[rame][ ]width",0.1);
 ONPar<Base2PenD> framepen("f[rame][ ]pen",defframepen), tickpen("t[icks][ ]pen",deftickpen);
 ONPar<Base2DoubleD> ticklen("t[icks][ ]length",0.18);
 ONPar<Base2TransD> transp("transparency",0.0);
 ONPar<Base2StringD> transpmodel("model","Normal");
 ONPar<Base2DoubleD> rx("r[el]x",0.0),ry("r[el]y",0.0);

 ParseNamedParameters params(input,proj,xint,yint,xtics,ytics,domain,mark,font,offset,framewidth,framepen,tickpen,ticklen,transp,transpmodel,rx,ry); if(!params) {err=params.Error(); goto fail;} // Error parsing parameters

 layer.proj=proj; // Get projection
 opts+=layer.proj.Value()+" ";

 { // Get tics intervals
  XYIntVal dx=xint,dy=yint;
  opts+="-Bx"+ToString(dx.isauto?AutoStep(layer.proj.region.xb,layer.proj.region.xe):dx.val)+" -By"+ToString(dy.isauto?AutoStep(layer.proj.region.yb,layer.proj.region.ye):dy.val)+" ";
 }

 { // Get xtics and ytics positions
  std::string xt=xtics, yt=ytics;
  std::string xaxis, yaxis;
  TemplateComparator none("none"), both("both");
  TemplateComparator up("up"), down("down");
  TemplateComparator left("left"), right("right");
  tolower(xt); tolower(yt);

  if(none.Compare(xt)) xaxis="sn";
  if(down.Compare(xt)) xaxis="Sn";
  if(  up.Compare(xt)) xaxis="sN";
  if(both.Compare(xt)) xaxis="SN";

  if( none.Compare(yt)) yaxis="we";
  if( left.Compare(yt)) yaxis="We";
  if(right.Compare(yt)) yaxis="wE";
  if( both.Compare(yt)) yaxis="WE";

  if(xaxis.empty()) {err="Incorrect xtics position "+xtics.Value(); goto fail;} // Unknown value of xtics
  if(yaxis.empty()) {err="Incorrect xtics position "+ytics.Value(); goto fail;} // Unknown value of ytics
  opts+="-B"+xaxis+yaxis+" ";
 }

 { // Get domain and mark
  std::string dom=domain;
  std::string format;
  TemplateComparator p("positive"),n("negative"),c("centered");
  tolower(dom);

  if(p.Compare(dom)) format="+ddd:mm:ss";
  if(n.Compare(dom)) format="-ddd:mm:ss";
  if(c.Compare(dom)) format="ddd:mm:ss";
  if(format.empty()) {err="Incorrect domain value "+domain.Value(); goto fail;} // Unknown domain

  if(mark) format+="F";
  opts+="--FORMAT_GEO_MAP="+format+" ";
 }

 opts+="--FONT_ANNOT_PRIMARY="+font.Value().Value()+" "; // Get font
 opts+="--MAP_ANNOT_OFFSET_PRIMARY="+ToString(offset.Value())+"c "; // Get offset
 opts+="--MAP_FRAME_WIDTH="+ToString(framewidth.Value())+"c "; // Get framewidth
 opts+="--MAP_FRAME_PEN="+framepen.Value().Value()+" "; // Get framepen
 opts+="--MAP_TICK_LENGTH_PRIMARY="+ToString(ticklen.Value())+"c "; // Get ticklen
 opts+="--MAP_TICK_PEN_PRIMARY="+tickpen.Value().Value()+" "; // Get tickpen
 if(transp!=0) opts+="-t"+ToString(transp.Value())+" "; // Get transparency
 opts+="--PS_TRANSPARENCY="+transpmodel.Value()+" "; // Get transparency model

 // Get shift
 layer.shiftx=rx;
 layer.shifty=ry;

 { // Calling psbasemap
  void* gmtapi;
  std::string* draw=new std::string;
  int ret;

  gmtapi=GMT_Create_Session("DrawFrame",2,GMTMODE,0);
  if(0==gmtapi) goto fail; // Can't create GMT GMT_Create_Session
  ret=callgmtmodule(gmtapi,"psbasemap",opts,draw);
  GMT_Destroy_Session(gmtapi);
  if(0!=ret) {delete draw; goto fail;} // Psbasemap error
  layer.data.reset(draw);
 }

 layer.creator="psbasemap "+opts;
 return new ObjectGMTLayer(layer);

 fail:
 return new ObjectError("DrawFrame",err);
}