#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_ColorGray(const ObjectList* input)
{
 struct gmt_color c;
 bool suc=true;
 Base2RGB g(input,0);
 Base2Transp t(input,1);

 c.model=gmt_color::GRAY;
 c.gray=g(&suc);
 c.transparency=t(&suc);

 if(suc) return new ObjectGMTColor(c);
 else return 0;
}

const ObjectBase* GMT_ColorRGB(const ObjectList* input)
{
 struct gmt_color c;
 bool suc=true;
 Base2RGB r(input,0),g(input,1),b(input,2);
 Base2Transp t(input,3);

 c.model=gmt_color::RGB;
 c.r=r(&suc);
 c.g=g(&suc);
 c.b=b(&suc);
 c.transparency=t(&suc);

 if(suc) return new ObjectGMTColor(c);
 else return 0;
}

const ObjectBase* GMT_ColorHSV(const ObjectList* input)
{
 struct gmt_color c;
 bool suc=true;
 Base2Hue h(input,0);
 Base2SV s(input,1),v(input,2);
 Base2Transp t(input,3);

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

 if(suc) return new ObjectGMTColor(c);
 else return 0;
}

const ObjectBase* GMT_ColorCMYK(const ObjectList* input)
{
 struct gmt_color c;
 bool suc=true;
 Base2CMYK cyan(input,0),m(input,1),y(input,2),k(input,3);
 Base2Transp t(input,4);

 c.model=gmt_color::CMYK;
 c.cyan=cyan(&suc);
 c.magenta=m(&suc);
 c.yellow=y(&suc);
 c.black=k(&suc);
 c.transparency=t(&suc);

 if(suc) return new ObjectGMTColor(c);
 else return 0;
}

// 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, xrel (xr), yrel (yr). 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, xrel and yrel are shift from current position. x (y) and xrel (yrel) are mutually exlusive, but x (y) and yrel (xrel) can be used simultaneously. If position for some axis is absent, then this position is unchanged.
*/
const ObjectBase* GMT_LayerShift(const ObjectList* input)
{
 auto size=input->Size();
 struct gmt_layer layer;

 // Case 1
 if(3==size)
 {
  Base2Layer l(input,0);
  Base2Double x(input,1), y(input,2);
  bool suc=true;
  layer=l(&suc);
  if(!suc) goto case2;
  layer.shiftx=x(&suc);
  layer.shifty=y(&suc);
  if(!suc) goto case2;
  return new ObjectGMTLayer(layer);
 }

 case2:

 // Search layer for shifting
 {
  SearchParameter<struct gmt_layer> original(input,"layer","l");
  bool suc=true;
  layer=original(&suc);
  if(!suc) goto fail; // Conversion failed or too many arguments
 }
 // Do shift
 {
  BaseM2Double xr(input,"xrel","xr"), yr(input,"yrel","yr");
  Base2Double x(input,"x"), y(input,"y");
  bool suc=true;
  // Check duplicate parameters
  if( ( x.Exist() && xr.Exist() ) || ( y.Exist() && yr.Exist() ) ) goto fail;
  if(x.Exist()) layer.shiftx=x(&suc);
  if(y.Exist()) layer.shifty=y(&suc);
  if(xr.Exist()) layer.shiftx+=x(&suc);
  if(yr.Exist()) layer.shifty+=y(&suc);
  if(!suc) goto fail;
 }

 return new ObjectGMTLayer(layer);

 fail:
 return 0;
}


// 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).
transpmodel - 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.
x, xr or xrel - shift layer on x cm in horisontal direction. Default is 0.
y, yr or yrel - shift layer on y cm in vertical direction. Default is 0.
*/
const ObjectBase* GMT_DrawFrame(const ObjectList* input)
{
 std::string opts="-P -O -K ";
 bool suc=true;
 struct gmt_layer layer;
 // Defaults
 std::string defxtics="down", defytics="left", defint="auto", defdomain="pos", deftranspmodel="Normal";
 bool defmark=false;
 gmt_font deffont; deffont.Convert("12,Times-Roman,black");
 double defoffset=0.18, defframewidth=0.1, defticklen=0.18;
 gmt_pen defframepen, deftickpen; defframepen.Convert("0.35,black"); deftickpen.Convert("0.3,black");

 { // Get projection
  BaseMT2Projection proj(input,"proj","projection");

  layer.proj=proj(&suc);
  if(!suc) goto fail;
  opts+=layer.proj.Value()+" ";
 }

 { // Get xint and yint
  BaseMD2String xint(input,defint,"xint"), yint(input,defint,"yint");
  double dx,dy;
  std::string str;

  str=xint(&suc);
  if(suc && "auto"==str) dx=AutoStep(layer.proj.region.xb,layer.proj.region.xe);
  else // No auto, get numeric value
  {
   Base2Double xint(input,"xint");
   suc=true;
   dx=xint(&suc);
   if(!suc) goto fail; // Parameter exists, but conversion failed
  }

  str=yint(&suc);
  if(suc && "auto"==str) dy=AutoStep(layer.proj.region.yb,layer.proj.region.ye);
  else // No auto, get numeric value
  {
   Base2Double yint(input,"yint");
   suc=true;
   dy=yint(&suc);
   if(!suc) goto fail; // Parameter exists, but conversion failed
  }
  opts+="-Bx"+ToString(dx)+" -By"+ToString(dy)+" ";
 }

 { // Get xtics and ytics
  BaseMD2String x(input,defxtics,"xtics"), y(input,defytics,"ytics");
  std::string xtics,ytics;
  std::string xaxis,yaxis;

  xtics=x(&suc);
  if(!suc) goto fail; // Conversion failed
  if("none"==xtics) xaxis="sn";
  if("down"==xtics) xaxis="Sn";
  if("up"==xtics) xaxis="sN";
  if("both"==xtics) xaxis="SN";

  ytics=y(&suc);
  if(!suc) goto fail; // Conversion failed
  if("none"==ytics) yaxis="we";
  if("left"==ytics) yaxis="We";
  if("right"==ytics) yaxis="wE";
  if("both"==ytics) yaxis="WE";

  if(xaxis.empty() || yaxis.empty()) goto fail; // Unknown value of xtics and/or ytics

  opts+="-B"+xaxis+yaxis+" ";
 }

 { // Get domain and mark
  BaseMD2String d(input,defdomain,"domain");
  BaseMD2Bool m(input,defmark,"mark");
  std::string format;

  std::string domain=d(&suc);
  if(!suc) goto fail; // Conversion failed
  if("pos"==domain) format="+ddd:mm:ss";
  if("neg"==domain) format="-ddd:mm:ss";
  if("center"==domain) format="ddd:mm:ss";
  if(format.empty()) goto fail; // Unknown domain

  if(m(&suc)) format+="F";
  if(!suc) goto fail; // Conversion failed

  opts+="--FORMAT_GEO_MAP="+format+" ";
 }

 { // Get font
  BaseMD2Font f(input,deffont,"font");
  gmt_font font;
  font=f(&suc);
  if(!suc) goto fail; // Conversion failed
  opts+="--FONT_ANNOT_PRIMARY="+font.Value()+" ";
 }

 { // Get offset
  BaseMD2Double o(input,defoffset,"offset");
  double offset;
  offset=o(&suc);
  if(!suc) goto fail; // Conversion failed
  opts+="--MAP_ANNOT_OFFSET_PRIMARY="+ToString(offset)+"c ";
 }

 { // Get framewidth
  SearchParameterWDef<double,false,PMin<0> > f(input,defframewidth,"framewidth");
  double framewidth;
  framewidth=f(&suc);
  if(!suc) goto fail; // Conversion failed
  opts+="--MAP_FRAME_WIDTH="+ToString(framewidth)+"c ";
 }

 { // Get framepen
  BaseMD2Pen p(input,defframepen,"framepen");
  gmt_pen framepen;
  framepen=p(&suc);
  if(!suc) goto fail; // Conversion failed
  opts+="--MAP_FRAME_PEN="+framepen.Value()+" ";
 }

 { // Get ticklen
  BaseMD2Double t(input,defticklen,"ticklen","ticklength");
  double ticklen;
  ticklen=t(&suc);
  if(!suc) goto fail; // Conversion failed
  opts+="--MAP_TICK_LENGTH_PRIMARY="+ToString(ticklen)+"c ";
 }

 { // Get tickpen
  BaseMD2Pen t(input,deftickpen,"tickpen");
  gmt_pen tickpen;
  tickpen=t(&suc);
  if(!suc) goto fail; // Conversion failed
  opts+="--MAP_TICK_PEN_PRIMARY="+tickpen.Value()+" ";
 }

 { // Get transparency
  Base2Transp t(input,"trans","transp","transparency");
  double transp;
  transp=t(&suc);
  if(!suc) goto fail; // Conversion failed
  if(transp!=0) opts+="-t"+ToString(transp)+" ";
 }

 { // Get transpmodel
  BaseMD2String tm(input,deftranspmodel,"transpmodel","transparencymodel");
  std::string transpmodel;
  transpmodel=tm(&suc);
  if(!suc) goto fail; // Conversion failed
  opts+="--PS_TRANSPARENCY="+transpmodel+" ";
 }

 { // Get x, y
  BaseMD2Double x(input,0.0,"x","xr","xrel"), y(input,0.0,"y","yr","yrel");
  layer.shiftx=x(&suc);
  layer.shifty=y(&suc);
  if(!suc) goto fail; // Conversion failed
 }

 { // 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 0;
}