import tornado

# API request handler for /api/v1/alerts
class APIAlertsHandler(tornado.web.RequestHandler):
    def get(self):
        # todo
        self.write("Hello, world")

# API request handler for /api/v1/alerts/stream
class APIAlertsStreamHandler(tornado.web.RequestHandler):
    def get(self):
        # todo
        self.write("Hello, world")



# Given URL query params and an alert, figure out if the alert "passes" the requested filters or is rejected. The list
# of query parameters and their function is defined in the API docs.
def alert_allowed_by_query(alert, query):
    for k in query.keys():
        match k:
            case "received_since":
                since = datetime.fromtimestamp(int(query.get(k)), pytz.UTC)
                if not alert.received_time or alert.received_time <= since:
                    return False
            case "max_duration":
                max_duration = int(query.get(k))
                # Check the duration if end_time is provided. If end_time is not provided, assume the activation is
                # "short", i.e. it always passes this check. If dxpeditions_skip_max_duration_check is true and
                # the alert is a dxpedition, it also always passes the check.
                if alert.is_dxpedition and (bool(query.get(
                        "dxpeditions_skip_max_duration_check")) if "dxpeditions_skip_max_duration_check" in query.keys() else False):
                    continue
                if alert.end_time and alert.start_time and alert.end_time - alert.start_time > max_duration:
                    return False
            case "source":
                sources = query.get(k).split(",")
                if not alert.source or alert.source not in sources:
                    return False
            case "sig":
                # If a list of sigs is provided, the alert must have a sig and it must match one of them.
                # The special "sig" "NO_SIG", when supplied in the list, mathches alerts with no sig.
                sigs = query.get(k).split(",")
                include_no_sig = "NO_SIG" in sigs
                if not alert.sig and not include_no_sig:
                    return False
                if alert.sig and alert.sig not in sigs:
                    return False
            case "dx_continent":
                dxconts = query.get(k).split(",")
                if not alert.dx_continent or alert.dx_continent not in dxconts:
                    return False
            case "dx_call_includes":
                dx_call_includes = query.get(k).strip()
                if not alert.dx_call or dx_call_includes.upper() not in alert.dx_call.upper():
                    return False
    return True