import argparse
import json
import os
import shlex
import subprocess
from contextlib import asynccontextmanager
from typing import Any, Dict

import aiohttp
from bot_constants import (
    MAX_SESSION_TIME,
    REQUIRED_ENV_VARS,
)
from bot_registry import BotRegistry  # Changed from bot_definitions to bot_registry
from bot_runner_helpers import (
    determine_room_capabilities,
    ensure_prompt_config,
    process_dialin_request,
)
from fastapi import FastAPI, HTTPException, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse

from pipecat.transports.services.helpers.daily_rest import (
    DailyRESTHelper,
    DailyRoomParams,
    DailyRoomProperties,
    DailyRoomSipParams,
)

daily_helpers = {}
bot_registry = BotRegistry()  # Instantiate BotRegistry

async def create_daily_room(room_url: str = None, config_body: Dict[str, Any] = None):
    if not room_url:
        capabilities = determine_room_capabilities(config_body)
        sip_params = None
        if capabilities["enable_dialin"]:
            sip_params = DailyRoomSipParams(
                display_name="dialin-user", video=False, sip_mode="dial-in", num_endpoints=2
            )
        properties = DailyRoomProperties(sip=sip_params)
        if capabilities["enable_dialout"]:
            properties.enable_dialout = True
        capability_str = ", ".join([f"{k}={v}" for k, v in capabilities.items()])
        print(f"Creating room with capabilities: {capability_str}")
        params = DailyRoomParams(properties=properties)
        print("Creating new room...")
        room = await daily_helpers["rest"].create_room(params=params)
    else:
        try:
            room = await daily_helpers["rest"].get_room_from_url(room_url)
        except Exception:
            raise HTTPException(status_code=500, detail=f"Room not found: {room_url}")
    print(f"Daily room: {room.url} {room.config.sip_endpoint}")
    token = await daily_helpers["rest"].get_token(room.url, MAX_SESSION_TIME)
    if not room or not token:
        raise HTTPException(status_code=500, detail="Failed to get room or token")
    return {"room": room.url, "token": token, "sip_endpoint": room.config.sip_endpoint}

async def start_bot(room_details: Dict[str, str], body: Dict[str, Any], example: str) -> bool:
    room_url = room_details["room"]
    token = room_details["token"]
    body_json = json.dumps(body).replace('"', '\\"')
    print(f"++++ Body JSON: {body_json}")
    bot_proc = f'python3 -m {example} -u {room_url} -t {token} -b "{body_json}"'
    print(f"Starting bot. Example: {example}, Room: {room_url}")
    try:
        command_parts = shlex.split(bot_proc)
        subprocess.Popen(command_parts, bufsize=1, cwd=os.path.dirname(os.path.abspath(__file__)))
        return True
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to start subprocess: {e}")

@asynccontextmanager
async def lifespan(app: FastAPI):
    aiohttp_session = aiohttp.ClientSession()
    daily_helpers["rest"] = DailyRESTHelper(
        daily_api_key=os.environ.get("HF_DAILY_API_KEY", ""),
        daily_api_url=os.environ.get("DAILY_API_URL", "https://api.daily.co/v1"),
        aiohttp_session=aiohttp_session,
    )
    yield
    await aiohttp_session.close()

app = FastAPI(lifespan=lifespan)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

@app.post("/start")
async def handle_start_request(request: Request) -> JSONResponse:
    room_url = os.environ.get("HF_DAILY_SAMPLE_ROOM_URL", None)
    try:
        data = await request.json()
        if "test" in data:
            return JSONResponse({"test": True})
        if all(key in data for key in ["From", "To", "callId", "callDomain"]):
            body = await process_dialin_request(data)
        elif "config" in data:
            body = bot_registry.setup_configuration(data["config"])
        else:
            raise HTTPException(status_code=400, detail="Invalid request format")
        body = ensure_prompt_config(body)
        bot_type_name = bot_registry.detect_bot_type(body)
        if not bot_type_name:
            raise HTTPException(status_code=400, detail="Configuration doesn't match any supported scenario")
        room_details = await create_daily_room(room_url, body)
        await start_bot(room_details, body, bot_type_name)
        bot_type = bot_registry.get_bot(bot_type_name)
        response = {"status": "Bot started", "bot_type": bot_type_name}
        if bot_type.has_test_mode(body):
            response["room_url"] = room_details["room"]
            if "llm" in body:
                response["llm_provider"] = body["llm"]
        if "dialout_settings" in body and len(body["dialout_settings"]) > 0:
            first_setting = body["dialout_settings"][0]
            if "phoneNumber" in first_setting:
                response["dialing_to"] = f"phone:{first_setting['phoneNumber']}"
            elif "sipUri" in first_setting:
                response["dialing_to"] = f"sip:{first_setting['sipUri']}"
        return JSONResponse(response)
    except json.JSONDecodeError:
        raise HTTPException(status_code=400, detail="Invalid JSON in request body")
    except Exception as e:
        raise HTTPException(status_code=400, detail=f"Request processing error: {str(e)}")

if __name__ == "__main__":
    for env_var in REQUIRED_ENV_VARS:
        hf_env_var = f"HF_{env_var}"
        if hf_env_var not in os.environ:
            raise Exception(f"Missing environment variable: {hf_env_var}.")
    parser = argparse.ArgumentParser(description="Pipecat Bot Runner")
    parser.add_argument("--host", type=str, default=os.environ.get("HOST", "0.0.0.0"), help="Host address")
    parser.add_argument("--port", type=int, default=os.environ.get("PORT", 7860), help="Port number")
    parser.add_argument("--reload", action="store_true", default=True, help="Reload code on change")
    config = parser.parse_args()
    try:
        import uvicorn
        uvicorn.run("bot_runner:app", host=config.host, port=config.port, reload=config.reload)
    except KeyboardInterrupt:
        print("Pipecat runner shutting down...")