#! /usr/bin/python3

import sys
import re
from geo import Geo




if len(sys.argv) < 4:
    print("Usage:")
    print("    %s <infile.geo> <outfile.geo> <operation> [<operation options> ...]" % (sys.argv[0], ))
    print("Operations:")
    print("    del_model <reg_ex_filter>    Delete models with the name matching regular expression.")
    print("    geo_name <geo_name>          Rename the name of the .geo .")
    print("    rename_model <old> <new>     Rename model <old> to <new>.")
    exit()

fn_in = sys.argv[1]
fn_out = sys.argv[2]
if fn_in == fn_out:
    print("Input and output filenames are identical. Refusing to run, to avoid accidental lose.")

print("Reading '%s'..." % (fn_in, ))
fh_in = open(fn_in, "rb")
geo = Geo()
geo.loadFromFile(fh_in)
fh_in.close()
print("Done.")
print()

arg_i = 3
while arg_i < len(sys.argv):
    operation = sys.argv[arg_i]
    arg_i += 1
    if operation == "del_model":
        reg_exp_str = sys.argv[arg_i]
        arg_i += 1
        reg_exp = re.compile(reg_exp_str)
        for i in range(len(geo.models) - 1, -1, -1):
            name = geo.models[i].name.decode("utf-8")
            if reg_exp.search(name) is not None:
                print("Remove: %s" % (name, ))
                del geo.models[i]
            else:
                print("Keep  : %s" % (name, ))
    elif operation == "geo_name":
        name = sys.argv[arg_i]
        arg_i += 1
        print("Rename GEO from '%s' to '%s'" % (geo.header_modelheader_name.decode("utf-8"), name))
        geo.header_modelheader_name = bytes(name, "utf-8")
    elif operation == "rename_model":
        nameold = bytes(sys.argv[arg_i], "utf-8")
        namenew = bytes(sys.argv[arg_i+1], "utf-8")
        arg_i += 2
        renamed = False
        for m in geo.models:
            if m.name == nameold:
                m.name = namenew
                print("Renamed model '%s' to '%s'" % (nameold.decode("utf-8"), namenew.decode("utf-8")))
                renamed +=1
                break
        if renamed <= 0:
            print("   **Warning!*** Rename failed, no model name matched '%s'." % (nameold.decode("utf-8"), ))
    else:
        print("Unknown operation: '%s'" % (operation, ))
        exit()

print()
print("Writing '%s'..." % (fn_out, ))
fh_out = open(fn_out, "wb")
geo.saveToFile(fh_out)
fh_out.close()
print("Done.")