"""
Shared test fixtures for the BeanFlows test suite.
"""
import hashlib
import hmac
from datetime import datetime
from pathlib import Path
from unittest.mock import AsyncMock, patch

import aiosqlite
import pytest


from beanflows import core
from beanflows.app import create_app


SCHEMA_PATH = Path(__file__).parent.parent / "src" / "beanflows" / "migrations" / "schema.sql"


# ── Database ─────────────────────────────────────────────────

@pytest.fixture
async def db():
    """In-memory SQLite with full schema, patches core._db."""
    conn = await aiosqlite.connect(":memory:")
    conn.row_factory = aiosqlite.Row
    await conn.execute("PRAGMA foreign_keys=ON")

    schema = SCHEMA_PATH.read_text()
    await conn.executescript(schema)
    await conn.commit()

    original_db = core._db
    core._db = conn

    yield conn

    core._db = original_db
    await conn.close()


# ── App & client ─────────────────────────────────────────────

@pytest.fixture
async def app(db):
    """Quart app with DB already initialized (init_db/close_db patched to no-op)."""
    with patch.object(core, "init_db", new_callable=AsyncMock), \
         patch.object(core, "close_db", new_callable=AsyncMock):
        application = create_app()
        application.config["TESTING"] = True
        yield application


@pytest.fixture
async def client(app):
    """Unauthenticated test client."""
    async with app.test_client() as c:
        yield c


# ── Users ────────────────────────────────────────────────────

@pytest.fixture
async def test_user(db):
    """Create a test user, return dict with id/email/name."""
    now = datetime.utcnow().isoformat()
    async with db.execute(
        "INSERT INTO users (email, name, created_at) VALUES (?, ?, ?)",
        ("test@example.com", "Test User", now),
    ) as cursor:
        user_id = cursor.lastrowid
    await db.commit()
    return {"id": user_id, "email": "test@example.com", "name": "Test User"}


@pytest.fixture
async def auth_client(app, test_user):
    """Test client with session['user_id'] pre-set."""
    async with app.test_client() as c:
        async with c.session_transaction() as sess:
            sess["user_id"] = test_user["id"]
        yield c


# ── Subscriptions ────────────────────────────────────────────

@pytest.fixture
def create_subscription(db):
    """Factory: create a subscription row for a user."""
    async def _create(
        user_id: int,
        plan: str = "pro",
        status: str = "active",
        provider_subscription_id: str = "sub_test456",
        current_period_end: str = "2025-03-01T00:00:00Z",
    ) -> int:
        now = datetime.utcnow().isoformat()
        async with db.execute(
            """INSERT INTO subscriptions
               (user_id, plan, status,
                provider_subscription_id, current_period_end, created_at, updated_at)
               VALUES (?, ?, ?, ?, ?, ?, ?)""",
            (user_id, plan, status, provider_subscription_id,
             current_period_end, now, now),
        ) as cursor:
            sub_id = cursor.lastrowid
        await db.commit()
        return sub_id
    return _create


# ── Billing Customers ───────────────────────────────────────

@pytest.fixture
def create_billing_customer(db):
    """Factory: create a billing_customers row for a user."""
    async def _create(user_id: int, provider_customer_id: str = "cust_test123") -> int:
        async with db.execute(
            """INSERT INTO billing_customers (user_id, provider_customer_id)
               VALUES (?, ?)
               ON CONFLICT(user_id) DO UPDATE SET provider_customer_id = excluded.provider_customer_id""",
            (user_id, provider_customer_id),
        ) as cursor:
            row_id = cursor.lastrowid
        await db.commit()
        return row_id
    return _create


# ── Roles ───────────────────────────────────────────────────

@pytest.fixture
def grant_role(db):
    """Factory: grant a role to a user."""
    async def _grant(user_id: int, role: str) -> None:
        await db.execute(
            "INSERT OR IGNORE INTO user_roles (user_id, role) VALUES (?, ?)",
            (user_id, role),
        )
        await db.commit()
    return _grant


@pytest.fixture
async def admin_client(app, test_user, grant_role):
    """Test client with admin role and session['user_id'] pre-set."""
    await grant_role(test_user["id"], "admin")
    async with app.test_client() as c:
        async with c.session_transaction() as sess:
            sess["user_id"] = test_user["id"]
        yield c


# ── Config ───────────────────────────────────────────────────

@pytest.fixture(autouse=True)
def patch_config():

    """Set test Paddle config values."""

    original_values = {}
    test_values = {

        "PADDLE_API_KEY": "test_api_key_123",
        "PADDLE_WEBHOOK_SECRET": "whsec_test_secret",
        "PADDLE_ENVIRONMENT": "sandbox",
        "PADDLE_PRICES": {"starter": "pri_starter_123", "pro": "pri_pro_456"},

        "BASE_URL": "http://localhost:5000",
        "DEBUG": True,
    }
    for key, val in test_values.items():
        original_values[key] = getattr(core.config, key, None)
        setattr(core.config, key, val)


    yield


    for key, val in original_values.items():
        setattr(core.config, key, val)


# ── Webhook helpers ──────────────────────────────────────────


@pytest.fixture(autouse=True)
def mock_paddle_verifier(monkeypatch):
    """Mock Paddle's webhook Verifier to accept test payloads."""
    def mock_verify(self, payload, secret, signature):
        if not signature or signature == "invalid_signature":
            raise ValueError("Invalid signature")

    monkeypatch.setattr(
        "paddle_billing.Notifications.Verifier.verify",
        mock_verify,
    )


@pytest.fixture
def mock_paddle_client(monkeypatch):
    """Mock _paddle_client() to return a fake PaddleClient."""
    from unittest.mock import MagicMock

    mock_client = MagicMock()
    monkeypatch.setattr(
        "beanflows.billing.routes._paddle_client",
        lambda: mock_client,
    )
    return mock_client


def make_webhook_payload(
    event_type: str,
    subscription_id: str = "sub_test456",
    customer_id: str = "ctm_test123",
    user_id: str = "1",
    plan: str = "starter",
    status: str = "active",
    ends_at: str = "2025-03-01T00:00:00.000000Z",
) -> dict:
    """Build a Paddle webhook payload dict."""
    return {
        "event_type": event_type,
        "data": {
            "id": subscription_id,
            "status": status,
            "customer_id": customer_id,
            "custom_data": {"user_id": user_id, "plan": plan},
            "current_billing_period": {
                "starts_at": "2025-02-01T00:00:00.000000Z",
                "ends_at": ends_at,
            },
        },
    }


def sign_payload(payload_bytes: bytes) -> str:
    """Return a dummy signature for Paddle webhook tests (Verifier is mocked)."""
    return "ts=1234567890;h1=dummy_signature"


# ── Analytics mock ───────────────────────────────────────────

@pytest.fixture
def mock_analytics(monkeypatch):
    """Mock DuckDB analytics so dashboard tests run without a real DuckDB file.

    Patches _conn to a sentinel (so routes skip the 'if _conn is None' guard),
    then replaces every analytics query function with an async stub returning
    deterministic data matching what the dashboard templates expect.
    """
    from beanflows import analytics

    monkeypatch.setattr(analytics, "_conn", object())  # truthy sentinel

    _time_series = [
        {"market_year": y, "production": 170000.0 + y * 100,
         "exports": 80000.0, "imports": 5000.0,
         "ending_stocks": 20000.0, "total_distribution": 160000.0}
        for y in range(2021, 2026)
    ]
    # Ensure latest production is 172,000 (2024 → 170000 + 2024*100 is too big;
    # override the last element explicitly so the metric-card test matches).
    _time_series[-1]["production"] = 172000.0

    _top_producers = [
        {"country_name": "Brazil", "country_code": "BR",
         "market_year": 2025, "production": 63000.0},
        {"country_name": "Vietnam", "country_code": "VN",
         "market_year": 2025, "production": 30000.0},
    ]
    _stu_trend = [
        {"market_year": y, "stock_to_use_ratio_pct": 25.0}
        for y in range(2021, 2026)
    ]
    _balance = [
        {"market_year": y, "production": 170000.0,
         "total_distribution": 160000.0, "supply_demand_balance": 10000.0}
        for y in range(2021, 2026)
    ]
    _yoy_data = [
        {"country_name": "Brazil", "country_code": "BR",
         "market_year": 2025, "production": 63000.0, "production_yoy_pct": 2.5},
        {"country_name": "Vietnam", "country_code": "VN",
         "market_year": 2025, "production": 30000.0, "production_yoy_pct": -1.2},
    ]

    _commodities = [
        {"commodity_code": 711100, "commodity_name": "Coffee, Green"},
        {"commodity_code": 711200, "commodity_name": "Coffee, Roasted"},
    ]

    async def _ts(*a, **kw):   return _time_series
    async def _top(*a, **kw):  return _top_producers
    async def _stu(*a, **kw):  return _stu_trend
    async def _bal(*a, **kw):  return _balance
    async def _yoy(*a, **kw):  return _yoy_data
    async def _cmp(*a, **kw):  return []
    async def _com(*a, **kw):  return _commodities
    async def _none(*a, **kw): return None
    async def _empty(*a, **kw): return []

    monkeypatch.setattr(analytics, "get_global_time_series", _ts)
    monkeypatch.setattr(analytics, "get_top_countries", _top)
    monkeypatch.setattr(analytics, "get_stock_to_use_trend", _stu)
    monkeypatch.setattr(analytics, "get_supply_demand_balance", _bal)
    monkeypatch.setattr(analytics, "get_production_yoy_by_country", _yoy)
    monkeypatch.setattr(analytics, "get_country_comparison", _cmp)
    monkeypatch.setattr(analytics, "get_available_commodities", _com)
    # Pulse-page analytics
    monkeypatch.setattr(analytics, "get_price_latest", _none)
    monkeypatch.setattr(analytics, "get_price_time_series", _empty)
    monkeypatch.setattr(analytics, "get_cot_positioning_latest", _none)
    monkeypatch.setattr(analytics, "get_cot_index_trend", _empty)
    monkeypatch.setattr(analytics, "get_ice_stocks_latest", _none)
    monkeypatch.setattr(analytics, "get_ice_stocks_trend", _empty)
    monkeypatch.setattr(analytics, "get_weather_stress_latest", _none)
    monkeypatch.setattr(analytics, "get_weather_stress_trend", _empty)