"""RunComfy Workflow HTTP API"""

import base64
import json
import os
import uuid
from typing import Optional

import requests
import websocket
from dotenv import load_dotenv
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel

load_dotenv()

app = FastAPI(title="RunComfy Workflow API")

BASE_URL = "https://beta-api.runcomfy.net/prod/api"
USER_ID = os.getenv("RUNCOMFY_USER_ID")
API_TOKEN = os.getenv("API_TOKEN")

HEADERS = {
    "Authorization": f"Bearer {API_TOKEN}",
    "Content-Type": "application/json",
}

SUBDIR_UPLOAD_MAP = {
    "images": {"type": "input", "subfolder": ""},
    "loras": {"type": "input", "subfolder": "loras"},
    "checkpoints": {"type": "input", "subfolder": "checkpoints"},
    "vae": {"type": "input", "subfolder": "vae"},
}


class InputFile(BaseModel):
    filename: str
    type: str
    base64_data: str


class WorkflowRequest(BaseModel):
    server_id: str
    workflow_api: dict
    input_files: Optional[list[InputFile]] = None


class WorkflowResponse(BaseModel):
    prompt_id: str
    images: list[str]
    status: str
    server_id: str


def get_server_url(server_id: str) -> str:
    resp = requests.get(f"{BASE_URL}/users/{USER_ID}/servers/{server_id}", headers=HEADERS)
    resp.raise_for_status()
    data = resp.json()
    if data.get("current_status") != "Ready":
        raise Exception(f"机器未就绪: {data.get('current_status')}")
    return data["main_service_url"].rstrip("/")


def upload_file_from_base64(comfy_url: str, filename: str, base64_data: str, file_type: str, subfolder: str):
    file_bytes = base64.b64decode(base64_data)
    files = [("image", (filename, file_bytes, "application/octet-stream"))]
    data = {"overwrite": "true", "type": file_type, "subfolder": subfolder}
    resp = requests.post(f"{comfy_url}/upload/image", data=data, files=files)
    resp.raise_for_status()
    return resp.json()["name"]


def submit_prompt(comfy_url: str, workflow_api: dict, client_id: str) -> str:
    payload = {"prompt": workflow_api, "client_id": client_id}
    resp = requests.post(f"{comfy_url}/prompt", json=payload)
    resp.raise_for_status()
    return resp.json()["prompt_id"]


def wait_for_completion(comfy_url: str, client_id: str, prompt_id: str, timeout: int = 600):
    scheme = "wss" if comfy_url.startswith("https") else "ws"
    ws_url = f"{scheme}://{comfy_url.split('://', 1)[-1]}/ws?clientId={client_id}"
    ws = websocket.WebSocket()
    ws.settimeout(timeout)
    ws.connect(ws_url)
    try:
        while True:
            out = ws.recv()
            if not out or isinstance(out, bytes):
                continue
            msg = json.loads(out)
            if msg.get("type") == "executing":
                data = msg.get("data", {})
                if data.get("prompt_id") == prompt_id and data.get("node") is None:
                    break
            elif msg.get("type") == "execution_error":
                if msg.get("data", {}).get("prompt_id") == prompt_id:
                    raise Exception(f"执行错误: {msg['data'].get('exception_message')}")
    finally:
        ws.close()


def download_images_as_base64(comfy_url: str, prompt_id: str) -> list[str]:
    resp = requests.get(f"{comfy_url}/history/{prompt_id}")
    resp.raise_for_status()
    outputs = resp.json().get(prompt_id, {}).get("outputs", {})
    images = []
    for node_output in outputs.values():
        if "images" in node_output:
            for img in node_output["images"]:
                params = {"filename": img["filename"], "subfolder": img.get("subfolder", ""),
                         "type": img.get("type", "output")}
                resp = requests.get(f"{comfy_url}/view", params=params)
                resp.raise_for_status()
                images.append(base64.b64encode(resp.content).decode())
    return images


@app.post("/run", response_model=WorkflowResponse)
async def run_workflow(request: WorkflowRequest):
    try:
        comfy_url = get_server_url(request.server_id)
        client_id = str(uuid.uuid4())
        if request.input_files:
            for file in request.input_files:
                mapping = SUBDIR_UPLOAD_MAP.get(file.type, {"type": "input", "subfolder": file.type})
                upload_file_from_base64(comfy_url, file.filename, file.base64_data, 
                                       mapping["type"], mapping["subfolder"])
        prompt_id = submit_prompt(comfy_url, request.workflow_api, client_id)
        wait_for_completion(comfy_url, client_id, prompt_id)
        images = download_images_as_base64(comfy_url, prompt_id)
        return WorkflowResponse(prompt_id=prompt_id, images=images, status="Success", server_id=request.server_id)
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))


if __name__ == "__main__":
    import uvicorn
    port = int(os.getenv("PORT", "8000"))
    uvicorn.run(app, host="0.0.0.0", port=port)