import os
import logging
import threading
from contextlib import asynccontextmanager

from fastapi import FastAPI, Query, HTTPException
from fastapi.responses import JSONResponse, PlainTextResponse
from apscheduler.schedulers.background import BackgroundScheduler

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(name)s] %(levelname)s: %(message)s",
    datefmt="%H:%M:%S",
)
logger = logging.getLogger("api")

from proxy_pool import ProxyPool
from orchestrator import Orchestrator

WORKER_URL = os.environ.get(
    "WORKER_URL",
    "https://iptest-u2uk.onrender.com"
)

pool = ProxyPool()
orch = Orchestrator(pool, WORKER_URL)
scheduler = BackgroundScheduler(daemon=True)


def do_tick():
    try:
        orch.tick()
    except Exception as e:
        logger.error(f"Tick: {e}")


def ping_worker():
    orch.ping_worker()


def self_ping():
    host = os.environ.get("SPACE_HOST", "")
    if not host:
        return
    try:
        import requests
        requests.get(f"https://{host}/health", timeout=5)
    except Exception:
        pass


@asynccontextmanager
async def lifespan(app: FastAPI):
    logger.info("🚀 Proxy API v3")
    logger.info(f"   Worker: {WORKER_URL}")

    # charger backup GitHub au démarrage
    try:
        from github_store import load_from_github
        saved = load_from_github()
        if saved:
            pool.import_json(saved)
            logger.info(f"📂 Loaded {pool.size} proxies from GitHub")
    except Exception as e:
        logger.error(f"Backup load: {e}")

    scheduler.add_job(
        do_tick, "interval", seconds=30,
        id="tick", max_instances=1, coalesce=True,
    )
    scheduler.add_job(
        ping_worker, "interval", minutes=10,
        id="wpng", max_instances=1,
    )
    scheduler.add_job(
        self_ping, "interval", minutes=4,
        id="spng", max_instances=1,
    )
    scheduler.start()
    logger.info("⏰ Tick/30s | WorkerPing/10m | SelfPing/4m")
    threading.Thread(target=do_tick, daemon=True).start()
    yield
    scheduler.shutdown(wait=False)


app = FastAPI(
    title="🔌 Free Proxy API",
    version="3.0.0",
    lifespan=lifespan,
)


def _resp(entry, strategy):
    if entry is None:
        raise HTTPException(503, "No proxy available")
    d = entry.to_dict()
    d["strategy"] = strategy
    return d


@app.get("/")
async def root():
    return {
        "name": "Free Proxy API",
        "pool": pool.size,
        "worker": orch._worker_ok,
        "phase": orch._phase.value,
        "docs": "/docs",
    }


@app.get("/health")
async def health():
    return {
        "status": "ok" if pool.size > 0 else "warming",
        "pool": pool.size,
        "worker": orch._worker_ok,
    }


@app.get("/stats")
async def stats():
    s = pool.get_stats()
    s["orchestrator"] = orch.status
    return s


@app.get("/proxy")
async def get_proxy(
    protocol: str = Query(None),
    verified: bool = Query(False),
    strategy: str = Query("round-robin"),
):
    funcs = {
        "round-robin": pool.get_round_robin,
        "random": pool.get_random,
        "fastest": pool.get_fastest,
        "least-used": pool.get_least_used,
    }
    f = funcs.get(strategy)
    if not f:
        raise HTTPException(400, "Bad strategy")
    return _resp(f(protocol, verified), strategy)


@app.get("/proxy/random")
async def rand(protocol: str = Query(None), verified: bool = Query(False)):
    return _resp(pool.get_random(protocol, verified), "random")


@app.get("/proxy/best")
async def best(protocol: str = Query(None), verified: bool = Query(False)):
    return _resp(pool.get_fastest(protocol, verified), "fastest")


@app.get("/proxy/least")
async def least(protocol: str = Query(None), verified: bool = Query(False)):
    return _resp(pool.get_least_used(protocol, verified), "least-used")


@app.get("/rotate")
async def rotate(
    count: int = Query(5, ge=1, le=100),
    protocol: str = Query(None),
    verified: bool = Query(False),
):
    results, seen = [], set()
    for _ in range(count * 3):
        p = pool.get_round_robin(protocol, verified)
        if not p:
            break
        if p.proxy_url not in seen:
            seen.add(p.proxy_url)
            results.append(p.to_dict())
        if len(results) >= count:
            break
    if not results:
        raise HTTPException(503, "No proxies")
    return {"count": len(results), "proxies": results}


@app.get("/all")
async def get_all(
    protocol: str = Query(None),
    verified: bool = Query(False),
    limit: int = Query(200, le=1000),
):
    px = pool.get_all(protocol, verified, limit)
    return {"count": len(px), "proxies": px}


@app.get("/plain")
async def plain(
    protocol: str = Query(None),
    verified: bool = Query(False),
    limit: int = Query(200, le=1000),
):
    px = pool.get_all(protocol, verified, limit)
    return PlainTextResponse("\n".join(p["proxy_url"] for p in px))


@app.post("/feedback")
async def feedback(proxy_url: str = Query(...), success: bool = Query(...)):
    if success:
        pool.report_success(proxy_url)
    else:
        pool.report_failure(proxy_url)
    return {"ok": True}


@app.post("/force-check")
async def force():
    if orch._phase.value != "idle":
        return {"status": orch._phase.value}
    threading.Thread(target=do_tick, daemon=True).start()
    return {"status": "started"}


if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=7860)