/*********************************************************************
 *   Copyright 2018, UCAR/Unidata
 *   See netcdf/COPYRIGHT file for copying and redistribution conditions.
 *   $Header: /upc/share/CVS/netcdf-3/ncgen/genj.c,v 1.2 2010/05/17 23:26:44 dmh Exp $
 *********************************************************************/

#include "includes.h"

#ifdef ENABLE_JAVA

#undef EXCEPTWRAP

#undef TRACE

/*MNEMONIC*/
#define USEMEMORY 1

extern List* vlenconstants;  /* List<Constant*>;*/

/* Forward */
static void genj_definevardata(Symbol* vsym);

static const char* jtypeallcaps(nc_type type);
static const char* jtypecap(nc_type type);
static const char* jtype(nc_type type);
static const char* jarraytype(nc_type type);
static const char* jname(Symbol* sym);

static void genj_defineattr(Symbol* asym);
static void genj_definevardata(Symbol*);
static void genj_write(Generator*,Symbol* sym, Bytebuffer* code,
                       int rank, size_t* start, size_t* count);
static void genj_writevar(Generator*,Symbol*,Bytebuffer*,int,size_t*,size_t*);
static void genj_writeattr(Generator*,Symbol*,Bytebuffer*,int,size_t*,size_t*);

/*
 * Generate code for creating netCDF from in-memory structure.
 */
void
genjava_netcdf(void)
{
    int idim, ivar, iatt, maxdims;
    int ndims, nvars, natts, ngatts;
    const char *filename = rootgroup->file.filename;

    ndims = listlength(dimdefs);
    nvars = listlength(vardefs);
    natts = listlength(attdefs);
    ngatts = listlength(gattdefs);

    /* Construct the main class */
    codeline("import java.util.*;");
    codeline("import ucar.ma2.*;");
    codeline("import ucar.nc2.*;");
    codeline("import ucar.nc2.NetcdfFile.*;");

    codeline("");
    codepartial("public class ");
    codeline(mainname);
    codeline("{");

    /* Now construct the main procedure*/

    codeline("");
    codeline("static public void main(String[] argv) throws Exception");
    codeline("{");

    /* create necessary declarations */

    if(ndims > 0) {
	codeline("");
	codelined(1,"/* dimension lengths */");
	for(idim = 0; idim < ndims; idim++) {
	    Symbol* dsym = (Symbol*)listget(dimdefs,idim);
	    if(dsym->dim.declsize == NC_UNLIMITED) {
		bbprintf0(stmt,"%sfinal int %s_len = 0;\n",
			indented(1),jname(dsym));
	    } else {
		bbprintf0(stmt,"%sfinal int %s_len = %lu;\n",
			indented(1),
			jname(dsym),
			(unsigned long) dsym->dim.declsize);
	    }
	    codedump(stmt);
	}
    }
    codeflush();

    maxdims = 0;	/* most dimensions of any variable */
    for(ivar = 0; ivar < nvars; ivar++) {
      Symbol* vsym = (Symbol*)listget(vardefs,ivar);
      if(vsym->typ.dimset.ndims > maxdims)
	maxdims = vsym->typ.dimset.ndims;
    }

    codeline("");
#ifdef EXCEPTWRAP
    codelined(1,"try {");
#endif

    /* create netCDF file, uses NC_CLOBBER mode */
    codeline("");
    codelined(1,"/* enter define mode */");

    bbprintf0(stmt,
                "%sNetcdfFileWriteable ncfile = NetcdfFileWriteable.createNew(\"%s\", %s);\n",
		 indented(1),filename,(nofill_flag?"false":"true"));
    codedump(stmt);
    codeflush();
    
    /* define dimensions from info in dims array */
    if(ndims > 0) {
	codeline("");
	codelined(1,"/* define dimensions */");
        for(idim = 0; idim < ndims; idim++) {
            Symbol* dsym = (Symbol*)listget(dimdefs,idim);
	    if(dsym->dim.declsize == NC_UNLIMITED) {
                bbprintf0(stmt,"%sDimension %s_dim = ncfile.addUnlimitedDimension(\"%s\");\n",
                    indented(1),jname(dsym),jescapifyname(dsym->name));
	    } else {
                bbprintf0(stmt,"%sDimension %s_dim = ncfile.addDimension(\"%s\", %s_len);\n",
                    indented(1),jname(dsym),jescapifyname(dsym->name), jname(dsym));
	    }
            codedump(stmt);
       }
       codeflush();
    }

    /* define variables from info in vars array */
    if(nvars > 0) {
        codeline("");
        codelined(1,"/* define variables */");
        for(ivar = 0; ivar < nvars; ivar++) {
            Symbol* vsym = (Symbol*)listget(vardefs,ivar);
            Symbol* basetype = vsym->typ.basetype;
            Dimset* dimset = &vsym->typ.dimset;
            codeline("");
            bbprintf0(stmt,"%sArrayList %s_dimlist = new ArrayList();\n",
                                        indented(1),jname(vsym));
            codedump(stmt);
            if(dimset->ndims > 0) {
                for(idim = 0; idim < dimset->ndims; idim++) {
                    Symbol* dsym = dimset->dimsyms[idim];
                    bbprintf0(stmt,"%s%s_dimlist.add(%s_dim);\n",
                            indented(1),jname(vsym),jname(dsym));
                    codedump(stmt);
                }
	    }
            bbprintf0(stmt,
                            "%sncfile.addVariable(\"%s\", DataType.%s, %s_dimlist);\n",
			    indented(1),
                            jescapifyname(vsym->name),
                            jtypeallcaps(basetype->typ.typecode),
                            jname(vsym));
            codedump(stmt);
        }
        codeflush();
    }
        
    /* Define the global attributes*/
    if(ngatts > 0) {
        codeline("");
        codelined(1,"/* assign global attributes */");
        for(iatt = 0; iatt < ngatts; iatt++) {
            Symbol* gasym = (Symbol*)listget(gattdefs,iatt);
            genj_defineattr(gasym);            
        }
        codeline("");
        codeflush();
    }
    
    /* Define the variable specific attributes*/
    if(natts > 0) {
        codeline("");
        codelined(1,"/* assign per-variable attributes */");
        for(iatt = 0; iatt < natts; iatt++) {
            Symbol* asym = (Symbol*)listget(attdefs,iatt);
            genj_defineattr(asym);
        }
        codeline("");
        codeflush();
    }

    codelined(1,"ncfile.create();"); /* equiv to nc_enddef */

    if(!header_only) {
        /* Load values into those variables with defined data */
        if(nvars > 0) {
            codeline("");
            codelined(1,"/* assign variable data */");
            for(ivar = 0; ivar < nvars; ivar++) {
                Symbol* vsym = (Symbol*)listget(vardefs,ivar);
                if(vsym->data != NULL) genj_definevardata(vsym);
            }
            codeline("");
        }
    }

    codeflush();

}

void
genjava_close(void)
{
    codelined(1,"ncfile.close();");
    codeline("");
#ifdef EXCEPTIONWRAP
    codelined(1,"} catch(Exception e) {e.printStackTrace();};");
#endif
    codelined(1,"}"); /* main */
    codeline("}"); /* class Main */
    codeflush();
}

const char* 
jtypeallcaps(nc_type type)
{
    switch (type) {
      case NC_CHAR: return "CHAR";
      case NC_BYTE: return "BYTE";
      case NC_SHORT: return "SHORT";
      case NC_INT: return "INT";
      case NC_FLOAT: return "FLOAT";
      case NC_DOUBLE: return "DOUBLE";
      case NC_UBYTE: return "LONG";
      case NC_USHORT: return "LONG";
      case NC_UINT: return "LONG";
      case NC_INT64: return "LONG";
      case NC_UINT64: return "LONG";
      case NC_STRING: return "STRING";
      default: PANIC1("ncctype: bad type code:%d",type);
    }
    return 0;
}

static const char* 
jtypecap(nc_type type)
{
    switch (type) {
      case NC_CHAR: return "Char";
      case NC_BYTE: return "Byte";
      case NC_SHORT: return "Short";
      case NC_INT: return "Int";
      case NC_FLOAT: return "Float";
      case NC_DOUBLE: return "Double";
      case NC_UBYTE: return "Long";
      case NC_USHORT: return "Long";
      case NC_UINT: return "Long";
      case NC_INT64: return "Long";
      case NC_UINT64: return "Long";
      case NC_STRING: return "String";
      case NC_ENUM: return "Int";
      case NC_OPAQUE: return "String";
      default: PANIC1("ncctype: bad type code:%d",type);
    }
    return 0;
}

void
jquotestring(Bytebuffer* databuf, char quote)
{
    char* escaped = jescapify(bbContents(databuf),'"',bbLength(databuf));
    bbClear(databuf);
    bbAppend(databuf,quote);
    if(escaped != NULL) bbCat(databuf,escaped);
    bbAppend(databuf,quote);
}

/* Compute the name for a given symbol*/
/* Cache in symbol->lname*/
static const char*
jname(Symbol* sym)
{
    char* name;
    assert (sym->fqn != NULL);
    /* convert to language form*/
    name = codify(sym->fqn); /* convert to usable form*/
    return name;
}


/*
 * Return java type name for netCDF type, given type code.
 */
static const char* 
jtype(nc_type type)
{
    switch (type) {
      case NC_CHAR: return "char";
      case NC_BYTE: return "byte";
      case NC_SHORT: return "short";
      case NC_INT: return "int";
      case NC_FLOAT: return "float";
      case NC_DOUBLE: return "double";
      case NC_UBYTE: return "long";
      case NC_USHORT: return "long";
      case NC_UINT: return "long";
      case NC_INT64: return "long";
      case NC_UINT64: return "long";
      case NC_STRING: return "String";
      case NC_ENUM: return "int";
      case NC_OPAQUE: return "String";
      default: PANIC1("ncctype: bad type code:%d",type);
    }
    return 0;
}

/*
 * Return a type name and dimensions for constant arrays
 * for netCDF type, given type code.
 */
static const char* 
jarraytype(nc_type type)
{
    switch (type) {
      case NC_CHAR:
	return "String";
      case NC_BYTE:
	return "byte";
      case NC_SHORT:
	return "short";
      case NC_INT:
	return "int";
      case NC_FLOAT:
	return "float";
      case NC_DOUBLE:
	return "double";
      case NC_UBYTE:
	return "long";
      case NC_USHORT:
	return "long";
      case NC_UINT:
	return "long";
      case NC_INT64:
	return "long";
      case NC_UINT64:
	return "long";
      case NC_STRING:
	return "String";
      case NC_ENUM:
	return "int";
      case NC_OPAQUE:
	return "String";
      default:
	PANIC1("ncctype: bad type code:%d",type);
    }
    return 0;
}

/*
 * Return netcdf interface type name for netCDF type suffix, given type code.
 */
const char* 
jstype(nc_type nctype)
{
    switch (nctype) {
      case NC_CHAR:
	return "text";
      case NC_BYTE:
	return "schar";
      case NC_SHORT:
	return "short";
      case NC_INT:
	return "int";
      case NC_FLOAT:
	return "float";
      case NC_DOUBLE:
	return "double";
      case NC_UBYTE:
	return "ubyte";
      case NC_USHORT:
	return "ushort";
      case NC_UINT:
	return "uint";
      case NC_INT64:
	return "longlong";
      case NC_UINT64:
	return "ulonglong";
      case NC_STRING:
	return "string";
      case NC_OPAQUE:
	return "opaque";
      case NC_ENUM:
	return "enum";
      default:
	derror("ncstype: bad type code: %d",nctype);
	return 0;
    }
}

static void
genj_defineattr(Symbol* asym)
{
    Bytebuffer* code; /* capture so we can dump vlens first */
    ASSERT(asym->data != NULL);
    code = bbNew();
    generator_reset(j_generator,NULL);
    generate_attrdata(asym,j_generator,(Writer)genj_write,code);
    bbFree(code);
}


static void
genj_definevardata(Symbol* vsym)
{
    Bytebuffer* code; /* capture so we can dump vlens first */
    if(vsym->data == NULL) return;
    code = bbNew();
    generator_reset(j_generator,NULL);
    generate_vardata(vsym,j_generator,(Writer)genj_write,code);
    bbFree(code);
}

static void
genj_write(Generator* generator, Symbol* sym, Bytebuffer* code,
           int rank, size_t* start, size_t* count)
{
    if(sym->objectclass == NC_ATT)
	genj_writeattr(generator,sym,code,rank,start,count);
    else if(sym->objectclass == NC_VAR)
	genj_writevar(generator,sym,code,rank,start,count);
    else
	PANIC("illegal symbol for genj_write");
}

static void
genj_writevar(Generator* generator, Symbol* vsym, Bytebuffer* code,
              int rank, size_t* start, size_t* count)
{
    Dimset* dimset = &vsym->typ.dimset;
    int typecode = vsym->typ.basetype->typ.typecode;
    int i;

    codeline("");
    codelined(1,"{"); /* Enclose in {...} for scoping */

    if(rank == 0) {
        bbprintf0(stmt,"%sArray%s.D0 data = new Array%s.D0();\n",
		indented(1),jtypecap(typecode), jtypecap(typecode));
        codedump(stmt);
        if(typecode == NC_CHAR) {
            /* Construct the data Array */
            jquotestring(code,'\'');
	    bbprintf0(stmt,"%sdata.set((char)%s);\n",
			  indented(1),bbContents(code));
	} else {
	    commify(code);
            bbprintf0(stmt,"%sdata.set((%s)%s);\n",
	 	      indented(1),jtype(typecode),bbContents(code));
        }
	codedump(stmt);
        /* do the actual write */
        bbprintf0(stmt,"%sncfile.write(\"%s\",data);\n",
		indented(1),jescapifyname(vsym->name));
	codedump(stmt);
    } else { /* array */
	Bytebuffer* dimbuf = bbNew();
        /* Construct the dimension set*/
	bbCat(dimbuf,"new int[]{");
	for(i=0;i<rank;i++) {
            Symbol* dsym = dimset->dimsyms[i];
	    char tmp[32];
	    nprintf(tmp,sizeof(tmp),"%lu",dsym->dim.declsize);
	    if(i>0) {bbCat(dimbuf,", ");}
	    bbCat(dimbuf,tmp);
	}
	bbCat(dimbuf,"}");
        /* Construct the data array and capture its index */
	if(typecode == NC_CHAR) {
	    jquotestring(code,'"');
            bbprintf0(stmt,"%sString contents = ",
			indented(1));
	} else {
            bbprintf0(stmt,"%s%s[] contents = new %s[] {",
			indented(1),jtype(typecode),jtype(typecode));
	    commify(code);
	}
	codedump(stmt);
        codedump(code);
        if(typecode != NC_CHAR) codepartial("}");
        codeline(";");
        bbprintf0(stmt,"%sArray%s data = new Array%s(%s);\n",
		indented(1),
		jtypecap(typecode),
		jtypecap(typecode),
		bbContents(dimbuf));
        codedump(stmt);
        codelined(1,"IndexIterator iter = data.getIndexIterator();");
        codelined(1,"int count = 0;");
        codelined(1,"while(iter.hasNext())");
	if(typecode == NC_CHAR)
            bbprintf0(stmt,
			"%siter.setCharNext(contents.charAt(count++));\n",indented(2));
	else
            bbprintf0(stmt,"%siter.set%sNext(contents[count++]);\n",
                    indented(2),jtypecap(typecode));
	codedump(stmt);
        bbFree(dimbuf);
	/* Construct the origin set from the start set */
        bbprintf0(stmt,"%sint[] origin = new int[]{",indented(1));
	for(i=0;i<rank;i++) {
	    bbprintf(stmt,"%s%lu",(i>0?", ":""),start[i]);
	}
	bbCat(stmt,"};\n");
	codedump(stmt);
        /* do the actual write */
        bbprintf0(stmt,"%sncfile.write(\"%s\",origin,data);\n",
		indented(1),jescapifyname(vsym->name));
	codedump(stmt);
    }
    codelined(1,"}"); /* Enclose in {...} for scoping */
    codeflush();
}

static void
genj_writeattr(Generator* generator, Symbol* asym, Bytebuffer* code,
               int rank, size_t* start, size_t* count)
{
    Symbol* basetype = asym->typ.basetype;
    nc_type typecode = basetype->typ.typecode;
    /* default assumption */
    size_t len = asym->data == NULL?0:asym->data->length; 

    codeprintf("%s/* attribute: %s */\n",indented(1),asym->name);

    /* Handle NC_CHAR specially */
    if(typecode == NC_CHAR) {
        /* revise the length count */
        len = bbLength(code);
        if(len == 0) {
	    bbAppend(code,'\0'); len++;
	    bbClear(code);
	    bbCat(code,"\"\"");
	    len++;
	} else
            jquotestring(code,'"');
	bbNull(code);
    } else { /* not NC_CHAR*/
        char* code2;
	commify(code);
        /* Convert to constant */
        code2 = bbDup(code);
        bbClear(code);
        bbprintf0(stmt,"new %s[]",
                jarraytype(typecode));
        bbCatbuf(code,stmt);
        bbCat(code,"{");
        bbCat(code,code2);
        bbCat(code,"}");
        efree(code2);
    }
    switch (typecode) {
    case NC_BYTE:
    case NC_SHORT:
    case NC_INT:
    case NC_FLOAT:
    case NC_DOUBLE:
	codelined(1,"{");
	bbprintf0(stmt,"%sArray data = Array.factory(%s.class, new int[]{%lu}, ",
		indented(1),
		jtype(basetype->typ.typecode),
		len);
	codedump(stmt);
        codedump(code);
	codeline(");");
	if(asym->att.var == NULL) {
            bbprintf0(stmt,"%sncfile.addGlobalAttribute(\"%s\",data);\n",
                indented(1),jescapifyname(asym->name));
	} else {
            bbprintf0(stmt,"%sncfile.addVariableAttribute(\"%s\",\"%s\",data);\n",
		indented(1),
		jescapifyname(asym->att.var->name),
                jescapifyname(asym->name));
	}
        codedump(stmt);
	codelined(1,"}");
        codeflush();
        break;

    case NC_CHAR:
	if(asym->att.var == NULL) {
            bbprintf0(stmt,"%sncfile.addGlobalAttribute(\"%s\",%s);\n",
		indented(1),
                jescapifyname(asym->name),
		bbContents(code));
	} else {
            bbprintf0(stmt,"%sncfile.addVariableAttribute(\"%s\",\"%s\",%s);\n",
		indented(1),
		jescapifyname(asym->att.var->name),
                jescapifyname(asym->name),
		bbContents(code));
	}
        codedump(stmt);
        codeflush();
        break;

    default: break;
    }
    codeflush();
}


#endif /*ENABLE_JAVA*/