#!/usr/bin/python2.5

"""
 * Add -fPIC to CPPFLAGS, CFLAGS in Library.mak
 * Build a shared lib with: gcc-3.3  -g -lstdc++ -shared -Wl,-soname,csmap -o csmap.so *.o
 * Run with: 
 
    LD_LIBRARY_PATH="." python2.5 epsg.py 2805
"""

import ctypes
import sys
import osr

wkt = ('None',
'Ogc',
'GeoTiff',
'Esri',
'Oracle',
'GeoTools',
'Epsg',
'Oracle9',
'Autodesk',
'Unknown',
'AppAlt',
'LclAlt',
'Legacy')

types = dict(  zip(wkt, range( len(wkt) ))  )

def run(code, wkt_type=5):
    
    csmap = ctypes.CDLL("csmap.so")
    csmap.CS_altdr("../Dictionaries")
    name = ctypes.create_string_buffer(64)
    result = csmap.csMapIdToNameC(15, # geographic
                        name, ctypes.sizeof(name), 
                        4, # cs-map internal
                        1, # EPSG
                        code)
    if result:                     
        result = csmap.csMapIdToNameC(16, # projected
                            name, ctypes.sizeof(name), 
                            4, # cs-map internal
                            1, # EPSG
                            code)
    wkt = ctypes.create_string_buffer(2048)
    csmap.CS_cs2Wkt (wkt, ctypes.sizeof(wkt),name, wkt_type)
    srs = osr.SpatialReference()
    srs.ImportFromWkt(str(wkt.value))
    print srs.ExportToPrettyWkt()
if __name__ == "__main__":                         
    if (len(sys.argv) > 2):
        if sys.argv[2] == "all":
            for key in types.keys():
                print key
                run(int(sys.argv[1]), types[key])
        else:
            run(int(sys.argv[1]), types[sys.argv[2]]) 
    elif len(sys.argv) == 2:
        run(int(sys.argv[1]))
    else:
        print "%s 2805 (%s)" % (sys.argv[0], "|".join(types))