#!/usr/bin/python3


from subprocess import call
from sys import argv, platform, exit, stderr
from os import environ, getenv, chdir
import shlex
import subprocess
from pathlib import Path

def enter_hfs():
    if '-hfs' not in argv:
        print('__ HouY __')
    hfs = getenv('HFS')
    if not hfs:
        print('Houdini Environment not yet initialized. Boostraping...', file=stderr)

        hfsen = {
            'darwin': Path('/Applications/Houdini').glob('Houdini*/Frameworks/Houdini.framework/Versions/Current/Resources'),
            'linux': Path('/opt').glob('hfs*'),
            'win32': Path(r'C:\Program Files\Side Effects Software').glob('Houdini *'),
        }
        if platform not in hfsen.keys():
            print('Platform `{}` not supported... yet.'.format(platform), file=stderr)
            exit(1)
        if hfsen.get(platform):
            h = list(hfsen[platform])
            print('Found: ', ', '.join(f.name for f in h), '*', sep='')
            hfs = h[-1]
        else:
            print("ERROR - couldn't find HFS")
            exit(1)

        if platform == 'win32' and '-hfs' not in argv:
            argv.append('-hfs')
            call([str(hfs/"bin/hcmd.exe"), '/c', *argv])
            exit()

    print('Current HFS:', hfs)
    chdir(hfs)
    return hfs

def welcome_redshift():
    if platform == 'win32':
        if '-rs3' in argv:
            redshift_path = 'C:/ProgramData/Redshift3'
        else:
            redshift_path = 'C:/ProgramData/Redshift'
    else:
        if '-rs3' in argv:
            redshift_path = '/opt/redshift3'
        else:
            redshift_path = '/opt/redshift'
    return redshift_path

if __name__ == '__main__':
    enter_hfs()
    redshift_path = welcome_redshift()
    if redshift_path:
        print('Redshift:', redshift_path)

    environ.update({
        'HOUDINI_NO_SPLASH': '1',
        'HOUDINI_DSO_ERROR': '2',
        'PATH': ';'.join(['{}/bin'.format(redshift_path),
                          environ.get('PATH')]),
        'REDSHIFT_COREDATAPATH': redshift_path,
        'HOUDINI_OCL_DEVICETYPE': 'GPU',
        'HOUDINI_OCL_DEVICENUMBER': '0',
        'HOUDINI_PATH': "{}/Plugins/Houdini/17.5.173;&".format(redshift_path),
    })
    if platform == 'win32':
        print()
        print('For OpenGL support remotely run this as an administrator:')
        print(r'c:\Windows\System32\tscon.exe {} /dest:console'.format(getenv('SessionName')))

    # Initialize env vars.
    if platform != 'win32':
        command = shlex.split("env -i sh -c '. houdini_setup >/dev/null && env'")
        proc = subprocess.Popen(command, stdout=subprocess.PIPE,
                                universal_newlines=True)
        for line in proc.stdout:
            (key, _, value) = str(line.strip()).partition('=')
            environ[key] = value
            print(key, '=', value)
        proc.communicate()
    call(['./bin/houdini'], env=environ)