import logging
from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from services import queue_manager
import os
from pathlib import Path

# CACHE PATCH BLOCK: place FIRST in pipeline.py!
HF_CACHE_DIR = Path("/tmp/hf_cache")
HF_CACHE_DIR.mkdir(parents=True, exist_ok=True)
os.environ.update({
    "HF_HOME": str(HF_CACHE_DIR),
    "HF_HUB_CACHE": str(HF_CACHE_DIR),
    "DIFFUSERS_CACHE": str(HF_CACHE_DIR),
    "TRANSFORMERS_CACHE": str(HF_CACHE_DIR),
    "XDG_CACHE_HOME": str(HF_CACHE_DIR),
    "HF_DATASETS_CACHE": str(HF_CACHE_DIR),
    "HF_MODULES_CACHE": str(HF_CACHE_DIR),
    "TMPDIR": str(HF_CACHE_DIR),
    "CACHE_DIR": str(HF_CACHE_DIR),
    "TORCH_HOME": str(HF_CACHE_DIR),
    "HOME": str(HF_CACHE_DIR)
})
import os.path
if not hasattr(os.path, "expanduser_original"):
    os.path.expanduser_original = os.path.expanduser
def safe_expanduser(path):
    if (
        path.startswith("~") or 
        path.startswith("/.cache") or 
        path.startswith("/root/.cache")
    ):
        return str(HF_CACHE_DIR)
    return os.path.expanduser_original(path)
os.path.expanduser = safe_expanduser


logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(message)s")

app = FastAPI(title="AI ADD Generator", version="1.0")

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

# ---------------------------
# Pydantic models
# ---------------------------
class IdeaRequest(BaseModel):
    idea: str

class ConfirmationRequest(BaseModel):
    task_id: str
    confirm: bool

# ---------------------------
# API endpoints
# ---------------------------
@app.post("/submit_idea")
async def submit_idea(request: IdeaRequest):
    task_id = await queue_manager.add_task(request.idea)
    return {"status": "submitted", "task_id": task_id}

@app.post("/confirm")
async def confirm_task(request: ConfirmationRequest):
    task = queue_manager.get_task_status(request.task_id)
    if not task:
        raise HTTPException(status_code=404, detail="Task not found")
    if task["status"] != queue_manager.TaskStatus.WAITING_CONFIRMATION:
        raise HTTPException(status_code=400, detail="Task not waiting for confirmation")

    await queue_manager.confirm_task(request.task_id)
    return {"status": "confirmed", "task": task}

@app.get("/status/{task_id}")
async def status(task_id: str):
    task = queue_manager.get_task_status(task_id)
    if not task:
        raise HTTPException(status_code=404, detail="Task not found")
    return task

@app.get("/")
async def health():
    return {"status": "running"}