import sys
from argparse import ArgumentParser
from typing import IO, Any

import orjson
from django.core.management.base import BaseCommand

from zerver.lib.queue import queue_json_publish


def error(*args: Any) -> None:
    raise Exception("We cannot enqueue because settings.USING_RABBITMQ is False.")


class Command(BaseCommand):
    help = """Read JSON lines from a file and enqueue them to a worker queue.

Each line in the file should either be a JSON payload or two tab-separated
fields, the second of which is a JSON payload.  (The latter is to accommodate
the format of error files written by queue workers that catch exceptions--their
first field is a timestamp that we ignore.)

You can use "-" to represent stdin.
"""

    def add_arguments(self, parser: ArgumentParser) -> None:
        parser.add_argument(
            "queue_name", metavar="<queue>", help="name of worker queue to enqueue to"
        )
        parser.add_argument(
            "file_name", metavar="<file>", help="name of file containing JSON lines"
        )

    def handle(self, *args: Any, **options: str) -> None:
        queue_name = options["queue_name"]
        file_name = options["file_name"]

        if file_name == "-":
            f: IO[str] = sys.stdin
        else:
            f = open(file_name)

        while True:
            line = f.readline()
            if not line:
                break

            line = line.strip()
            try:
                payload = line.split("\t")[1]
            except IndexError:
                payload = line

            print(f"Queueing to queue {queue_name}: {payload}")

            # Verify that payload is valid json.
            data = orjson.loads(payload)

            # This is designed to use the `error` method rather than
            # the call_consume_in_tests flow.
            queue_json_publish(queue_name, data, error)