"""Session fixture for the ani-web test suite.

Spins up a throwaway server (127.0.0.1:8399, temp data dir, seeded
users admin/alice/bob/dave/erin) once per pytest run, tears it down
afterwards. The real server on :8321 and its data are never touched.

Usage:  .venv/bin/pytest tests/ -q
"""
import json
import os
import shutil
import signal
import socket
import subprocess
import sys
import tempfile
import time
import urllib.request
from pathlib import Path

import pytest

ROOT = Path(__file__).parent.parent
PORT = 8399
BASE = f"http://127.0.0.1:{PORT}"
USERS = (("admin", "adminpw12345"), ("alice", "alicepw12345"), ("bob", "bobpw12345"),
         ("dave", "davepw12345"), ("erin", "erinpw12345"))


def _wait_ready():
    for _ in range(120):
        try:
            urllib.request.urlopen(BASE + "/login", timeout=1)
            return
        except Exception:
            time.sleep(0.5)
    raise RuntimeError("server did not start")


@pytest.fixture(scope="session", autouse=True)
def server():
    # fail fast instead of silently testing a leftover server.
    # SO_REUSEADDR: the suite's own TIME_WAIT sockets (no listener, but
    # thousands of connections) would otherwise wedge this bind for ~60s.
    s = socket.socket()
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    try:
        s.bind(("127.0.0.1", PORT))
    except OSError:
        pytest.exit(f"port {PORT} is busy - is a leftover test server running?")
    finally:
        s.close()

    data = Path(tempfile.mkdtemp(prefix="aniweb-test-"))
    os.environ["ANIWEB_DATA"] = str(data)
    # the per-IP login budget must never trip during the suite (all tests
    # share 127.0.0.1); per-username lockout stays at production defaults
    os.environ.setdefault("ANIWEB_IP_FAILS", "1000")
    os.environ.setdefault("ANIWEB_IP_WINDOW", "300")
    sys.path.insert(0, str(ROOT))
    from server import db, users  # noqa: E402
    db.init()  # schema before users.add / seeding
    for name, pw in USERS:
        users.add(name, pw)
    c = db.connect()
    seed_t = time.time()
    c.execute("INSERT INTO history VALUES (?,?,?,?,?)",
              ("admin", "seed-1", 1, seed_t, json.dumps(
                  {"title": "Seed Anime", "slug_id": "seed-1", "season_id": 1,
                   "ep_id": 1, "lang": "eng", "ep": "1", "pos": 10.0, "t": seed_t})))
    c.commit()
    c.close()

    proc = subprocess.Popen(
        [sys.executable, "-m", "uvicorn", "server.app:app",
         "--host", "127.0.0.1", "--port", str(PORT)],
        cwd=ROOT, env=os.environ,
        stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
        start_new_session=True)
    try:
        _wait_ready()
        yield
    finally:
        os.killpg(proc.pid, signal.SIGTERM)
        try:
            proc.wait(timeout=5)
        except subprocess.TimeoutExpired:
            os.killpg(proc.pid, signal.SIGKILL)
            proc.wait()
        shutil.rmtree(data, ignore_errors=True)