#!bin/python
from run_local import log
from light9 import showconfig
from light9.namespaces import L9
from urllib.parse import urlparse
from urllib.parse import splitport

log.info('generating config')
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)
print("listen %s;" % splitport(urlparse(webServer).netloc)[1])


def location(path, server):
    print(f"""
    location /{path}/ {{

      # for websocket
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
      proxy_set_header Host $host;

      proxy_pass {server};
      proxy_buffering off;
      rewrite /[^/]+/(.*) /$1 break;
    }}""")


for role, server in sorted(graph.predicate_objects(netHome)):
    if not server.startswith('http') or role == L9['webServer']:
        continue
    path = graph.value(role, L9['urlPath'])
    if not path:
        continue
    server = server.rstrip('/')
    if 'collector' in path: continue
    location(path, server)

print('''

  location /collector/metrics {
    rewrite "/collector(/.*)" "$1" break;
    proxy_pass http://localhost:8202;
  }
  location /collector/ {
    proxy_pass http://localhost:8302;
  }

''')

showPath = showconfig.showUri().split('/', 3)[-1]
root = showconfig.root()[:-len(showPath)].decode('ascii')
print(f"""
    location /{showPath} {{
      root {root};
    }}""")