import asyncio
import json
import os
import sys
import time

import requests
import websockets

DISPATCH_WS_URL = os.getenv("DISPATCH_WS_URL", "ws://127.0.0.1:8020/ws/edge/edge-a4000-01")
WORKER_BASE_URL = os.getenv("WORKER_BASE_URL", "http://127.0.0.1:8000")
POLL_INTERVAL = float(os.getenv("EDGE_POLL_INTERVAL_SEC", "1.0"))

if len(sys.argv) > 1:
    DISPATCH_WS_URL = sys.argv[1]


def worker_post(path: str, payload: dict):
    r = requests.post(f"{WORKER_BASE_URL}{path}", json=payload, timeout=30)
    r.raise_for_status()
    return r.json()


def worker_get(path: str):
    r = requests.get(f"{WORKER_BASE_URL}{path}", timeout=20)
    r.raise_for_status()
    return r.json()


async def handle_generate(ws, data: dict):
    dispatch_id = data["dispatch_id"]
    req = data["request"]

    created = await asyncio.to_thread(worker_post, "/generate", req)
    task_id = created["task_id"]
    await ws.send(json.dumps({"event": "accepted", "dispatch_id": dispatch_id, "task_id": task_id}, ensure_ascii=False))

    while True:
        status = await asyncio.to_thread(worker_get, f"/tasks/{task_id}")
        await ws.send(
            json.dumps(
                {
                    "event": "status",
                    "dispatch_id": dispatch_id,
                    "task_id": task_id,
                    "status": status["status"],
                    "progress": status.get("progress", 0.0),
                },
                ensure_ascii=False,
            )
        )
        if status["status"] in {"SUCCEEDED", "FAILED"}:
            result = await asyncio.to_thread(worker_get, f"/tasks/{task_id}/result")
            await ws.send(
                json.dumps(
                    {
                        "event": "result",
                        "dispatch_id": dispatch_id,
                        "task_id": task_id,
                        **result,
                    },
                    ensure_ascii=False,
                )
            )
            return
        await asyncio.sleep(POLL_INTERVAL)


async def main() -> None:
    while True:
        try:
            async with websockets.connect(DISPATCH_WS_URL, max_size=2**22) as ws:
                print(f"connected: {DISPATCH_WS_URL}")
                while True:
                    raw = await ws.recv()
                    data = json.loads(raw)
                    event = data.get("event")
                    if event == "generate":
                        await handle_generate(ws, data)
                    elif event == "registered":
                        print("registered", data)
        except Exception as exc:
            print("connection error, retry in 3s:", exc)
            time.sleep(3)


if __name__ == "__main__":
    asyncio.run(main())