"""Tests for company shared-MX DNS onboarding."""

from unittest.mock import patch

import pytest

from app.services.dns_verification import (
    ownership_record_value,
    verify_company_dns,
    verify_dmarc,
)
from app.services.domain_policy import assert_company_domain_allowed
from app.services.domain_provisioning import (
    account_is_domain_owner,
    build_company_dns_records,
    build_shared_mx_spf_value,
    register_relay_domain,
)


def test_build_company_dns_records_use_shared_mx_and_spf_include():
    records = build_company_dns_records(
        "acme.com",
        "mail.gentic.email",
        "agmail",
        "abc123public",
        "_spf.gentic.email",
        "verify-token-123",
    )
    purposes = [record["purpose"] for record in records]
    assert purposes == ["ownership", "mx", "spf", "dkim", "dmarc"]

    ownership = next(record for record in records if record["purpose"] == "ownership")
    mx = next(record for record in records if record["purpose"] == "mx")
    spf = next(record for record in records if record["purpose"] == "spf")
    dkim = next(record for record in records if record["purpose"] == "dkim")

    assert ownership["host"] == "_agmail-verify"
    assert ownership["value"] == ownership_record_value("verify-token-123")
    assert mx["host"] == "@"
    assert mx["value"] == "mail.gentic.email"
    assert mx["priority"] == 10
    assert spf["value"] == "v=spf1 include:_spf.gentic.email ~all"
    assert dkim["host"] == "agmail._domainkey"
    assert "abc123public" in dkim["value"]
    assert not any(record.get("purpose") == "mail_host" for record in records)


def test_build_shared_mx_spf_value():
    assert build_shared_mx_spf_value("_spf.gentic.email") == (
        "v=spf1 include:_spf.gentic.email ~all"
    )


def test_register_relay_domain_appends_once(tmp_path, monkeypatch):
    relay_file = tmp_path / "domains.list"
    monkeypatch.setenv("RELAY_DOMAINS_FILE", str(relay_file))

    from app.config import get_settings

    get_settings.cache_clear()

    register_relay_domain("Acme.COM")
    register_relay_domain("acme.com")

    assert relay_file.read_text(encoding="utf-8") == "acme.com\n"

    get_settings.cache_clear()


def test_assert_company_domain_allowed_blocks_platform_and_google():
    with pytest.raises(ValueError, match="platform domain"):
        assert_company_domain_allowed("gentic.email", "gentic.email")
    with pytest.raises(ValueError, match="cannot be used"):
        assert_company_domain_allowed("google.com", "gentic.email")
    assert assert_company_domain_allowed("acme.com", "gentic.email") == "acme.com"


@patch("app.services.dns_verification._lookup_txt")
def test_verify_dmarc_requires_exact_match(mock_txt):
    expected = "v=DMARC1; p=quarantine; rua=mailto:dmarc@acme.com"
    mock_txt.return_value = ["v=DMARC1; p=reject; rua=mailto:security@google.com"]
    verified, message = verify_dmarc("acme.com", expected)
    assert verified is False
    assert "exactly" in message.lower()


@patch("app.services.dns_verification._lookup_txt")
@patch("app.services.dns_verification._lookup_mx")
def test_verify_company_dns_all_pass(mock_mx, mock_txt):
    mock_mx.return_value = [(10, "mail.gentic.email")]
    mock_txt.side_effect = lambda name: {
        "_agmail-verify.acme.com": [ownership_record_value("token-abc")],
        "acme.com": ['v=spf1 include:_spf.gentic.email ~all'],
        "agmail._domainkey.acme.com": ["v=DKIM1; k=rsa; p=abc123"],
        "_dmarc.acme.com": ["v=DMARC1; p=quarantine; rua=mailto:dmarc@acme.com"],
    }.get(name, [])

    checks = verify_company_dns(
        domain_name="acme.com",
        shared_mail_host="mail.gentic.email",
        dkim_selector="agmail",
        dkim_public_key="abc123",
        platform_spf_include="_spf.gentic.email",
        verification_token="token-abc",
    )

    assert all(check["verified"] for check in checks)
    assert [check["purpose"] for check in checks] == [
        "ownership",
        "mx",
        "spf",
        "dkim",
        "dmarc",
    ]