import os
import socket


from dotenv import load_dotenv
load_dotenv()

from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles

from routers import video
from cleanup import start_cleanup_scheduler


def write_cookies_from_secret():
    """Decode YT_COOKIES_B64 secret and write to disk at startup."""
    b64 = os.environ.get("YT_COOKIES_B64", "")
    if not b64:
        return
    import base64
    cookies_path = os.environ.get("YT_COOKIES_PATH", "/home/user/app/cookies.txt")
    with open(cookies_path, "wb") as f:
        f.write(base64.b64decode(b64))
    print(f"[startup] cookies.txt written to {cookies_path}")


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Start background cleanup on startup, cleanup on shutdown."""
    write_cookies_from_secret()
    start_cleanup_scheduler()
    yield


app = FastAPI(
    title="ClipForge API",
    version="2.0.0",
    description="AI-powered video clip generator. Turns long videos into short viral clips with karaoke-style captions.",
    lifespan=lifespan,
)

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

# API routes
app.include_router(video.router, prefix="/api/video", tags=["video"])

# Create working directories
os.makedirs("uploads", exist_ok=True)
os.makedirs("outputs", exist_ok=True)

# Serve output clips as static files
app.mount("/outputs", StaticFiles(directory="outputs"), name="outputs")


@app.get("/", tags=["root"])
def root():
    return {
        "app": "ClipForge API",
        "version": "2.0.0",
        "docs": "/docs",
        "health": "/health",
    }


@app.get("/health", tags=["health"])
def health_check():
    import requests as req

    def http_check(url):
        try:
            r = req.get(url, timeout=8, headers={"User-Agent": "Mozilla/5.0"}, allow_redirects=True)
            return r.status_code
        except Exception as e:
            return str(e)[:60]

    candidates = {
        "cobalt.privacyredirect.com": "https://cobalt.privacyredirect.com/",
        "inv.nadeko.net":             "https://inv.nadeko.net/api/v1/videos/dQw4w9WgXcQ",
        "yewtu.be":                   "https://yewtu.be/api/v1/videos/dQw4w9WgXcQ",
        "invidious.fdn.fr":           "https://invidious.fdn.fr/api/v1/videos/dQw4w9WgXcQ",
        "iv.datura.network":          "https://iv.datura.network/api/v1/videos/dQw4w9WgXcQ",
        "pipedapi.kavin.rocks":       "https://pipedapi.kavin.rocks/streams/dQw4w9WgXcQ",
        "piped-api.garudalinux.org":  "https://piped-api.garudalinux.org/streams/dQw4w9WgXcQ",
    }

    return {
        "status": "ok",
        "connectivity": {name: http_check(url) for name, url in candidates.items()},
        "cookies": "present" if os.path.exists(os.environ.get("YT_COOKIES_PATH", "/home/user/app/cookies.txt")) else "missing",
        "environment": "huggingface"
    }