"""
Integration tests for the FastAPI API layer.
Uses TestClient with an in-memory SQLite DB — no live market data.
"""

from datetime import date, timedelta
from unittest.mock import MagicMock, patch

import pytest
from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

from app.database import Base, get_db
from app.main import app

# ─── Test DB setup ─────────────────────────────────────────────────────────────

TEST_DB_URL = "sqlite://"  # in-memory

test_engine = create_engine(TEST_DB_URL, connect_args={"check_same_thread": False})
TestSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=test_engine)


def override_get_db():
    db = TestSessionLocal()
    try:
        yield db
    finally:
        db.close()


@pytest.fixture(autouse=True)
def setup_db():
    Base.metadata.create_all(bind=test_engine)
    yield
    Base.metadata.drop_all(bind=test_engine)


app.dependency_overrides[get_db] = override_get_db

# Disable scheduler during tests
with patch("app.main.start_scheduler"), patch("app.main.stop_scheduler"):
    client = TestClient(app, raise_server_exceptions=True)

FAKE_TOKEN = "abc123device0000000000000000000000000000000000000000000000000000"


# ─── Device registration ───────────────────────────────────────────────────────

def test_register_device():
    resp = client.post("/api/v1/devices/register", json={"apns_token": FAKE_TOKEN, "device_name": "Test iPhone"})
    assert resp.status_code == 200
    data = resp.json()
    assert data["apns_token"] == FAKE_TOKEN
    assert "id" in data


def test_register_device_idempotent():
    client.post("/api/v1/devices/register", json={"apns_token": FAKE_TOKEN})
    resp = client.post("/api/v1/devices/register", json={"apns_token": FAKE_TOKEN})
    assert resp.status_code == 200


# ─── Portfolio ─────────────────────────────────────────────────────────────────

@pytest.fixture
def registered_device():
    client.post("/api/v1/devices/register", json={"apns_token": FAKE_TOKEN})
    return FAKE_TOKEN


def test_add_portfolio(registered_device):
    resp = client.post(
        "/api/v1/portfolio",
        json=[{"ticker": "AAPL", "shares": 100}, {"ticker": "MSFT", "shares": 200}],
        headers={"X-Device-Token": registered_device},
    )
    assert resp.status_code == 200
    tickers = [p["ticker"] for p in resp.json()]
    assert "AAPL" in tickers
    assert "MSFT" in tickers


def test_get_portfolio_empty(registered_device):
    resp = client.get("/api/v1/portfolio", headers={"X-Device-Token": registered_device})
    assert resp.status_code == 200
    assert resp.json() == []


def test_get_portfolio_after_add(registered_device):
    client.post(
        "/api/v1/portfolio",
        json=[{"ticker": "NVDA", "shares": 50}],
        headers={"X-Device-Token": registered_device},
    )
    resp = client.get("/api/v1/portfolio", headers={"X-Device-Token": registered_device})
    assert resp.status_code == 200
    assert resp.json()[0]["ticker"] == "NVDA"


def test_delete_ticker(registered_device):
    client.post(
        "/api/v1/portfolio",
        json=[{"ticker": "AMD", "shares": 100}],
        headers={"X-Device-Token": registered_device},
    )
    resp = client.delete("/api/v1/portfolio/AMD", headers={"X-Device-Token": registered_device})
    assert resp.status_code == 204
    remaining = client.get("/api/v1/portfolio", headers={"X-Device-Token": registered_device}).json()
    assert all(p["ticker"] != "AMD" for p in remaining)


def test_portfolio_unregistered_device():
    resp = client.get("/api/v1/portfolio", headers={"X-Device-Token": "nonexistent_token"})
    assert resp.status_code == 404


# ─── Option Positions ──────────────────────────────────────────────────────────

def test_log_position(registered_device):
    expiry = str(date.today() + timedelta(days=14))
    resp = client.post(
        "/api/v1/positions",
        json={
            "ticker": "AAPL",
            "strategy": "covered_call",
            "strike": 195.0,
            "expiration": expiry,
            "premium_received": 2.50,
            "contracts": 1,
        },
        headers={"X-Device-Token": registered_device},
    )
    assert resp.status_code == 201
    data = resp.json()
    assert data["ticker"] == "AAPL"
    assert data["status"] == "open"
    assert data["id"] is not None


def test_close_position(registered_device):
    expiry = str(date.today() + timedelta(days=14))
    pos = client.post(
        "/api/v1/positions",
        json={
            "ticker": "AAPL",
            "strategy": "covered_call",
            "strike": 195.0,
            "expiration": expiry,
            "premium_received": 2.50,
        },
        headers={"X-Device-Token": registered_device},
    ).json()

    resp = client.patch(
        f"/api/v1/positions/{pos['id']}",
        json={"status": "closed", "close_reason": "bought_back"},
        headers={"X-Device-Token": registered_device},
    )
    assert resp.status_code == 200
    assert resp.json()["status"] == "closed"


def test_get_open_positions_filter(registered_device):
    expiry = str(date.today() + timedelta(days=14))
    client.post(
        "/api/v1/positions",
        json={"ticker": "TSLA", "strategy": "cash_secured_put", "strike": 200.0, "expiration": expiry, "premium_received": 3.0},
        headers={"X-Device-Token": registered_device},
    )
    resp = client.get("/api/v1/positions?status=open", headers={"X-Device-Token": registered_device})
    assert resp.status_code == 200
    assert len(resp.json()) >= 1
    assert all(p["status"] == "open" for p in resp.json())


# ─── Alerts ────────────────────────────────────────────────────────────────────

def test_get_alerts_empty(registered_device):
    resp = client.get("/api/v1/alerts", headers={"X-Device-Token": registered_device})
    assert resp.status_code == 200
    assert resp.json() == []


def test_acknowledge_alert(registered_device):
    from app.models.db_models import Alert
    from datetime import datetime

    db = TestSessionLocal()
    device_id = client.post("/api/v1/devices/register", json={"apns_token": FAKE_TOKEN}).json()["id"]
    alert = Alert(
        device_id=device_id,
        ticker="AAPL",
        alert_type="close_early",
        message="Test alert",
        sent_at=datetime.utcnow(),
        acknowledged=False,
    )
    db.add(alert)
    db.commit()
    db.refresh(alert)
    alert_id = alert.id
    db.close()

    resp = client.patch(
        f"/api/v1/alerts/{alert_id}/acknowledge",
        headers={"X-Device-Token": FAKE_TOKEN},
    )
    assert resp.status_code == 200
    assert resp.json()["acknowledged"] is True


# ─── Health ────────────────────────────────────────────────────────────────────

def test_health():
    with patch("app.routers"), patch("app.services.position_monitor.last_run", None):
        resp = client.get("/api/v1/health")
    assert resp.status_code == 200
    assert resp.json()["status"] == "ok"