from urllib.parse import urlparse

from light9 import showconfig

from light9.namespaces import L9

from light9.run_local import log

def main():

    [outPath] = sys.argv[1:]

    log.info(f'writing nginx config to {outPath}')

    graph = showconfig.getGraph()

    netHome = graph.value(showconfig.showUri(), L9['networking'])

    webServer = graph.value(netHome, L9['webServer'])

    if not webServer:

        raise ValueError('no %r :webServer' % netHome)

    proj_root = Path(__file__).parent.parent.parent.parent

    mime_types = proj_root / 'web/mime.types'

    nginx_port = urlparse(str(webServer)).port

    with open(outPath, 'wt') as out:

        print(f'''

worker_processes 1;

daemon off;

pid /dev/null;

events {{

  worker_connections 1024;

}}

http {{

  proxy_buffering off;

  proxy_http_version 1.1;

  # for websocket

  proxy_set_header Upgrade $http_upgrade;

  proxy_set_header Connection "upgrade";

 server {{

  listen {nginx_port};

  autoindex on;''',

              file=out)

        for role, server in sorted(graph.predicate_objects(netHome)):

            if not str(server).startswith('http') or role == L9['webServer']:

                continue

            path = graph.value(role, L9['urlPath'])

            if not path:

                continue

            server = str(server).rstrip('/')

            print(f'''

  location = /{path} {{ rewrite (.*) $1/ permanent; }}

  location /service/{path}/ {{

    rewrite ^/service/{path}(/.*) $1 break;

    proxy_pass {server};

  }}''',

                  file=out)

        showPath = showconfig.showUri().split('/', 3)[-1]

        root = showconfig.root()[:-len(showPath)].decode('ascii')

        print(f'''

  location /show/ {{

    root {root};

  }}