import json
from unittest import case
from typing import Dict, Any

import requests
from fastapi import Request, APIRouter, HTTPException
from fastapi.responses import HTMLResponse
from starlette.responses import RedirectResponse

from jb.config import settings, JB_EVENTS_STREAM
from jb.decorators import REDIS, HM
from jb.flow.monitoring import emit_assignment_event, emit_mturk_notification_event
from jb.models.definitions import AssignmentStatus
from jb.models.event import MTurkEvent
from jb.settings import BASE_HTML
from jb.config import settings
from jb.views.tasks import process_request

common_router = APIRouter(prefix="", tags=["API"], include_in_schema=True)


@common_router.get(path="/work/", response_class=HTMLResponse)
async def work(request: Request):
    """
    HTML Page that the worker lands on in an iFrame.
    They can either be previewing the HIT, or have already accepted it.
    """
    amt_assignment_id = request.query_params.get("assignmentId", None)
    worker_id = request.query_params.get("workerId", None)
    amt_hit_id = request.query_params.get("hitId", None)
    print(f"work: {amt_assignment_id=} {worker_id=} {amt_hit_id=}")

    if not worker_id:
        return RedirectResponse(
            url=f"/preview/?{request.url.query}" if request.url.query else "/preview/",
            status_code=302,
        )

    if amt_assignment_id is None or amt_assignment_id == "ASSIGNMENT_ID_NOT_AVAILABLE":
        # Worker is previewing the HIT
        amt_hit_type_id = "unknown"
        if amt_hit_id:
            hit = HM.get_from_amt_id(amt_hit_id=amt_hit_id)
            amt_hit_type_id = hit.amt_hit_type_id
        emit_assignment_event(
            status=AssignmentStatus.PreviewState, amt_hit_type_id=amt_hit_type_id
        )
        return RedirectResponse(
            url=f"/preview/?{request.url.query}" if request.url.query else "/preview/",
            status_code=302,
        )

    try:
        # The Worker has accepted the HIT
        process_request(request)
    except Exception:
        raise HTTPException(status_code=500, detail="Error processing request")

    return HTMLResponse(BASE_HTML)


@common_router.post(path=f"/{settings.sns_path}/", include_in_schema=False)
async def mturk_notifications(request: Request):
    """
    Our SNS topic will POST to this endpoint whenever we get a new message
    """
    try:
        message = await request.json()
    except Exception:
        raise HTTPException(status_code=500, detail="No POST data")

    match message.get("Type"):
        case "SubscriptionConfirmation":
            subscribe_url = message["SubscribeURL"]
            print("Confirming SNS subscription...")
            requests.get(subscribe_url)

        case "Notification":
            msg = json.loads(message["Message"])
            print("Received MTurk event:", msg)
            enqueue_mturk_notifications(msg)

        case _:
            raise HTTPException(status_code=500, detail="Invalid JSON")

    return {"status": "ok"}


def enqueue_mturk_notifications(msg: Dict[str, Any]) -> None:
    for evt in msg["Events"]:
        event = MTurkEvent.from_sns(evt)
        emit_mturk_notification_event(
            event_type=event.event_type, amt_hit_type_id=event.amt_hit_type_id
        )
        REDIS.xadd(JB_EVENTS_STREAM, {"data": event.model_dump_json()})