"""Offline-тесты POST /api/v1/trade-in/lead (#2376, sub-issue родителя #1971).

Покрытие (db мокается, NO live network/DB):
  - happy path: consent=True + валидный телефон -> 200, INSERT + commit
  - consent=False -> 422 (Literal[True] guard)
  - невалидный формат телефона -> 422
  - телефон без цифр / слишком мало цифр -> 422 (digit-guard, #2376 hardening)
  - source="landing" (мёртвая воронка) -> 422 (литерал убран из схемы)
  - estimate_id, которого нет в trade_in_estimates -> 404
"""

from __future__ import annotations

import os

os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost:5432/test")

from datetime import UTC, datetime
from typing import Any
from unittest.mock import MagicMock
from uuid import uuid4

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient


@pytest.fixture
def db() -> MagicMock:
    return MagicMock()


@pytest.fixture
def client(db: MagicMock) -> TestClient:
    from app.api.v1 import lead as lead_module
    from app.core.db import get_db

    app = FastAPI()
    app.include_router(lead_module.router, prefix="/api/v1/trade-in")

    def fake_db() -> Any:
        yield db

    app.dependency_overrides[get_db] = fake_db
    return TestClient(app)


def _insert_result(lead_id: str) -> MagicMock:
    result = MagicMock()
    result.mappings.return_value.one.return_value = {
        "id": lead_id,
        "created_at": datetime(2026, 7, 4, 12, 0, tzinfo=UTC),
    }
    return result


def test_lead_happy_path(client: TestClient, db: MagicMock) -> None:
    from app.api.v1 import lead as lead_module

    lead_id = str(uuid4())
    db.execute.return_value = _insert_result(lead_id)

    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "+7 (912) 345-67-89", "consent": True},
        headers={"x-forwarded-for": "203.0.113.7, 10.0.0.1"},
    )
    assert r.status_code == 200, r.text
    body = r.json()
    assert body["id"] == lead_id
    assert body["status"] == "received"
    assert db.commit.called

    params = db.execute.call_args.args[1]
    assert params["phone"] == "+7 (912) 345-67-89"
    assert params["consent"] is True
    assert params["source"] == "result"
    assert params["estimate_id"] is None
    # 152-ФЗ proof-of-consent (migration 182): client_ip / policy version / text
    # snapshot must reach the INSERT params, not just the audit log (#2497 TODO).
    assert params["client_ip"] == "203.0.113.7"  # first hop of X-Forwarded-For
    assert params["consent_policy_version"] == lead_module._CONSENT_POLICY_VERSION
    assert params["consent_text_snapshot"] == lead_module._CONSENT_TEXT_SNAPSHOT


def test_lead_client_ip_falls_back_to_peer_when_no_xff(client: TestClient, db: MagicMock) -> None:
    # No X-Forwarded-For header -> falls back to request.client.host (TestClient
    # reports "testclient"), still persisted rather than silently None.
    lead_id = str(uuid4())
    db.execute.return_value = _insert_result(lead_id)

    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "+79123456789", "consent": True},
    )
    assert r.status_code == 200, r.text

    params = db.execute.call_args.args[1]
    assert params["client_ip"] == "testclient"


def test_lead_consent_false_422(client: TestClient, db: MagicMock) -> None:
    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "+79123456789", "consent": False},
    )
    assert r.status_code == 422
    assert not db.execute.called


def test_lead_consent_missing_422(client: TestClient) -> None:
    r = client.post("/api/v1/trade-in/lead", json={"phone": "+79123456789"})
    assert r.status_code == 422


def test_lead_invalid_phone_422(client: TestClient) -> None:
    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "not-a-phone!!", "consent": True},
    )
    assert r.status_code == 422


def test_lead_with_unknown_estimate_id_404(client: TestClient, db: MagicMock) -> None:
    result = MagicMock()
    result.fetchone.return_value = None
    db.execute.return_value = result

    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "+79123456789", "consent": True, "estimate_id": str(uuid4())},
    )
    assert r.status_code == 404
    assert not db.commit.called


def test_lead_with_known_estimate_id_200(client: TestClient, db: MagicMock) -> None:
    lead_id = str(uuid4())
    exists_result = MagicMock()
    exists_result.fetchone.return_value = (1,)
    db.execute.side_effect = [exists_result, _insert_result(lead_id)]

    estimate_id = str(uuid4())
    r = client.post(
        "/api/v1/trade-in/lead",
        json={
            "phone": "+79123456789",
            "consent": True,
            "estimate_id": estimate_id,
        },
    )
    assert r.status_code == 200, r.text
    params = db.execute.call_args.args[1]
    assert params["estimate_id"] == estimate_id
    assert params["source"] == "result"


def test_lead_digit_free_phone_422(client: TestClient, db: MagicMock) -> None:
    # "(()) -- .." проходит regex-маску (только +/скобки/дефисы/точки/пробелы),
    # но содержит 0 цифр -> должно отклоняться digit-валидатором.
    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "(()) -- ..", "consent": True},
    )
    assert r.status_code == 422, r.text
    assert not db.execute.called


def test_lead_too_few_digits_phone_422(client: TestClient, db: MagicMock) -> None:
    # 6 цифр < минимума 10 -> 422 (маску проходит по длине, digit-guard режет).
    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "123-456", "consent": True},
    )
    assert r.status_code == 422, r.text
    assert not db.execute.called


def test_lead_source_landing_rejected_422(client: TestClient, db: MagicMock) -> None:
    # "landing"-воронка недостижима (rbac_guard закрывает /lead) — литерал убран
    # из схемы, поэтому явный source="landing" теперь 422.
    r = client.post(
        "/api/v1/trade-in/lead",
        json={"phone": "+79123456789", "consent": True, "source": "landing"},
    )
    assert r.status_code == 422, r.text
    assert not db.execute.called