import os
import uuid
from datetime import date

import pytest
from fastapi.testclient import TestClient


# Ensure required env vars before importing app
os.environ.setdefault("SECRET_KEY", "x" * 32)
os.environ.setdefault("DATABASE_URL", "sqlite:////tmp/delphi_test.sqlite")

from app.main import app  # noqa: E402
from app.auth.security import get_current_user  # noqa: E402
import app.api.qdros as qdros_module  # noqa: E402
from sqlalchemy.orm import Session  # noqa: E402
from app.database.base import get_db  # noqa: E402
from app.models.lookups import SystemSetup  # noqa: E402
from tests.test_qdros_api import _create_customer_and_file  # noqa: E402


class _User:
    def __init__(self):
        self.id = 1
        self.username = "tester"
        self.is_admin = True
        self.is_active = True
        self.is_approver = True


@pytest.fixture()
def client():
    app.dependency_overrides[get_current_user] = lambda: _User()
    try:
        yield TestClient(app)
    finally:
        app.dependency_overrides.pop(get_current_user, None)


class DummyNotification:
    def __init__(self):
        self.events = []

    def emit(self, event_type: str, payload: dict):
        self.events.append((event_type, payload))


def test_qdro_transition_emits_notification_when_notify_true(client: TestClient, monkeypatch):
    dummy = DummyNotification()
    # Patch the module-level service reference used by endpoints
    monkeypatch.setattr(qdros_module, "notification_service", dummy, raising=False)

    # Arrange: create file and qdro
    _, file_no = _create_customer_and_file(client)
    resp = client.post("/api/qdros", json={"file_no": file_no})
    assert resp.status_code == 200, resp.text
    qid = resp.json()["id"]

    # Act: submit for approval with notify=True
    resp = client.post(
        f"/api/qdros/{qid}/submit-for-approval",
        json={"reason": "send to approver", "notify": True, "effective_date": date.today().isoformat()},
    )
    assert resp.status_code == 200, resp.text

    # Assert: one event captured with expected shape
    assert dummy.events, "Expected a notification event to be emitted"
    event_type, payload = dummy.events[-1]
    assert event_type == "QDRO_STATUS_CHANGED"
    assert payload.get("qdro_id") == qid
    assert payload.get("file_no") == file_no
    assert payload.get("from") == "DRAFT"
    assert payload.get("to") == "APPROVAL_PENDING"


def test_qdro_transition_no_notification_when_notify_false(client: TestClient, monkeypatch):
    dummy = DummyNotification()
    monkeypatch.setattr(qdros_module, "notification_service", dummy, raising=False)

    _, file_no = _create_customer_and_file(client)
    resp = client.post("/api/qdros", json={"file_no": file_no})
    assert resp.status_code == 200, resp.text
    qid = resp.json()["id"]

    # notify omitted/false
    resp = client.post(f"/api/qdros/{qid}/submit-for-approval", json={"reason": "send"})
    assert resp.status_code == 200, resp.text

    assert dummy.events == []


def _upsert_system_setting(db: Session, key: str, value: str):
    row = db.query(SystemSetup).filter(SystemSetup.setting_key == key).first()
    if row:
        row.setting_value = value
    else:
        row = SystemSetup(setting_key=key, setting_value=value)
        db.add(row)
    db.commit()


def test_per_file_routing_overrides_email_and_webhook(client: TestClient, monkeypatch):
    dummy = DummyNotification()
    monkeypatch.setattr(qdros_module, "notification_service", dummy, raising=False)

    # Create file and qdro
    _, file_no = _create_customer_and_file(client)
    # Get DB session from dependency directly
    db_gen = get_db()
    db = next(db_gen)

    # Configure per-file routes
    _upsert_system_setting(db, f"notifications.qdro.email.to.file.{file_no}", "lawyer@example.com, clerk@example.com")
    _upsert_system_setting(db, f"notifications.qdro.webhook.url.file.{file_no}", "https://hooks.example.com/qdro-test")
    _upsert_system_setting(db, f"notifications.qdro.webhook.secret.file.{file_no}", "s3cr3t")

    resp = client.post("/api/qdros", json={"file_no": file_no, "plan_id": "PL-ABC"})
    assert resp.status_code == 200, resp.text
    qid = resp.json()["id"]

    resp = client.post(
        f"/api/qdros/{qid}/submit-for-approval",
        json={"reason": "send", "notify": True, "effective_date": date.today().isoformat()},
    )
    assert resp.status_code == 200, resp.text

    # Last event should include override markers
    assert dummy.events, "Expected a notification"
    _, payload = dummy.events[-1]
    assert payload.get("__notify_override") is True
    assert "lawyer@example.com" in str(payload.get("__notify_to"))
    assert payload.get("__webhook_override") is True
    assert payload.get("__webhook_url") == "https://hooks.example.com/qdro-test"
    assert payload.get("__webhook_secret") == "s3cr3t"
    # Close session
    try:
        db_gen.close()
    except Exception:
        pass


def test_plan_routing_applies_when_no_file_override(client: TestClient, monkeypatch):
    dummy = DummyNotification()
    monkeypatch.setattr(qdros_module, "notification_service", dummy, raising=False)

    # Create file + qdro with plan
    _, file_no = _create_customer_and_file(client)
    db_gen = get_db()
    db = next(db_gen)
    plan_id = "PL-RTE"
    _upsert_system_setting(db, f"notifications.qdro.email.to.plan.{plan_id}", "plan@example.com")

    resp = client.post("/api/qdros", json={"file_no": file_no, "plan_id": plan_id})
    assert resp.status_code == 200, resp.text
    qid = resp.json()["id"]

    resp = client.post(
        f"/api/qdros/{qid}/submit-for-approval",
        json={"reason": "send", "notify": True, "effective_date": date.today().isoformat()},
    )
    assert resp.status_code == 200, resp.text

    _, payload = dummy.events[-1]
    assert payload.get("__notify_override") is True
    assert payload.get("__notify_to") == "plan@example.com"
    try:
        db_gen.close()
    except Exception:
        pass