#! /usr/bin/env python
"""Generate python PyOpenGL api from xml registry documents (using xmlreg)"""
from __future__ import print_function
import os, logging, subprocess, glob
import xmlreg, codegenerator
import ctypetopytype

log = logging.getLogger('xml-generate')

KHRONOS_URL = 'https://github.com/KhronosGroup/OpenGL-Registry.git'
KHRONOS_API = os.path.join(os.path.dirname(__file__), 'khronosapi')


def get_khronos(khronosapi):
    if not os.path.exists(khronosapi):
        log.info("Cloning the Khronos API into %s", khronosapi)
        subprocess.check_call(['git', 'clone', KHRONOS_URL, khronosapi])
    else:
        log.info("Pulling new commits from Khronos API")
        subprocess.check_call(['git', 'pull', '--ff-only'], cwd=khronosapi)


def main(khronosapi=None):
    khronosapi = khronosapi or KHRONOS_API
    get_khronos(khronosapi)

    files = sorted(glob.glob(os.path.join(khronosapi, 'xml', '*.xml')))
    for file in files:
        generate_for_file(file)


def generate_for_file(filename):
    log.info('Starting file: %s', filename)
    registry = xmlreg.parse(filename)
    generator = codegenerator.Generator(registry, ctypetopytype.ctype_to_pytype)
    for name, feature in registry.feature_set.items():
        print(feature.name, feature.api)
        generator.module(feature)
    for name, extension in registry.extension_set.items():
        print(extension.name, extension.apis)
        generator.module(extension)


if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO)
    main()