#!/usr/bin/env python

import os
import shutil
import sys

# Import first to make sure pycdec is on path
import rt

from cdec.configobj import ConfigObj


def main():

    if len(sys.argv[1:]) not in (10, 12):
        sys.stderr.write('usage: {} a.fwd_params a.fwd_err a.rev_params a.rev_err sa sa.ini mono.klm cdec.ini weights.final output.d [libcdec_ff_hpyplm.so corpus.hpyplm]\n'.format(sys.argv[0]))
        sys.exit(2)

    (a_fwd_params, a_fwd_err, a_rev_params, a_rev_err, sa, sa_ini, mono_klm, cdec_ini, weights_final, output_d) = sys.argv[1:11]

    # Optional
    (libcdec_ff_hpyplm_so, corpus_hpyplm) = sys.argv[11:13] if len(sys.argv[1:]) == 12 else (None, None)

    if os.path.exists(output_d):
        sys.stderr.write('Directory {} exists, exiting.\n'.format(output_d))
        sys.exit(1)
    
    # output.d
    os.mkdir(output_d)

    # alignment model
    shutil.copy(a_fwd_params, os.path.join(output_d, 'a.fwd_params'))
    shutil.copy(a_fwd_err, os.path.join(output_d, 'a.fwd_err'))
    shutil.copy(a_rev_params, os.path.join(output_d, 'a.rev_params'))
    shutil.copy(a_rev_err, os.path.join(output_d, 'a.rev_err'))

    # grammar extractor
    shutil.copytree(sa, os.path.join(output_d, 'sa'))
    config = ConfigObj(sa_ini, unrepr=True)
    config.filename = os.path.join(output_d, 'sa.ini')
    rt.util.sa_ini_for_config(config)
    config.write()

    # language models
    shutil.copy(mono_klm, os.path.join(output_d, 'mono.klm'))
    if libcdec_ff_hpyplm_so:
        shutil.copy(libcdec_ff_hpyplm_so, os.path.join(output_d, 'libcdec_ff_hpyplm.so'))
    if corpus_hpyplm:
        shutil.copy(corpus_hpyplm, os.path.join(output_d, 'corpus.hpyplm'))

    # decoder config
    config = [[f.strip() for f in line.split('=')] for line in open(cdec_ini)]
    rt.util.cdec_ini_for_config(config)
    with open(os.path.join(output_d, 'cdec.ini'), 'w') as output:
        for (k, v) in config:
            output.write('{}={}\n'.format(k, v))

    # weights
    shutil.copy(weights_final, os.path.join(output_d, 'weights.final'))

    # other options
    rt_ini = os.path.join(output_d, 'rt.ini')
    with open(rt_ini, 'w') as out:
        if libcdec_ff_hpyplm_so and corpus_hpyplm:
            out.write('hpyplm=true\n')
        else:
            out.write('hpyplm=false\n')
        out.write('metric=ibm_bleu\n')
    sys.stderr.write('IMPORTANT: add any additional options such as metric=meteor to {}\n'.format(rt_ini))
            
if __name__ == '__main__':
    main()