"""Unit tests for booking_mail.py (#18): sender-address resolution and the
skip-if-not-an-email guard, per the acceptance criterion that customer_contact
(free-text "E-Mail oder Telefon") may not actually be an email address.
"""
from datetime import datetime, timedelta, timezone

import pytest

import booking_mail
from app import app as flask_app


@pytest.mark.parametrize("contact,expected", [
    ("alice@example.com", True),
    ("Alice@Example.COM", True),
    ("+49 151 2345678", False),
    ("0151-2345678", False),
    ("not-an-email", False),
    ("", False),
    (None, False),
])
def test_looks_like_email(contact, expected):
    assert booking_mail.looks_like_email(contact) is expected


def test_manage_url_embeds_token(monkeypatch):
    monkeypatch.setattr(booking_mail, "PUBLIC_BASE_URL", "https://onboard.example.com")
    assert booking_mail.manage_url("abc.def.ghi") == \
        "https://onboard.example.com/manage/abc.def.ghi"


def test_sender_uses_client_domain_when_configured():
    client = {"domain": "happynails.de"}
    assert booking_mail._sender_for(client) == "noreply@happynails.de"


def test_sender_falls_back_when_client_has_no_domain(monkeypatch):
    monkeypatch.setattr(booking_mail.mailer, "MAIL_FALLBACK_FROM", "noreply@mivanchenko.de")
    assert booking_mail._sender_for({"domain": None}) == "noreply@mivanchenko.de"
    assert booking_mail._sender_for({}) == "noreply@mivanchenko.de"
    assert booking_mail._sender_for(None) == "noreply@mivanchenko.de"


@pytest.mark.parametrize("raw,expected", [
    ("happynails.de", "happynails.de"),
    ("https://happynails.de", "happynails.de"),
    ("https://happynails.de/", "happynails.de"),
    ("http://happynails.de/shop", "happynails.de"),
    ("  happynails.de  ", "happynails.de"),
    ("HappyNails.de", "happynails.de"),
])
def test_sender_sanitizes_domain_entered_with_scheme_or_path(raw, expected):
    assert booking_mail._sender_for({"domain": raw}) == f"noreply@{expected}"


def _booking(contact="alice@example.com"):
    start = datetime.now(timezone.utc) + timedelta(days=1)
    return {
        "customer_name": "Alice",
        "customer_contact": contact,
        "service": "Haircut",
        "start_time": start,
        "status": "confirmed",
    }


def test_send_booking_confirmation_sends_when_contact_is_email(monkeypatch):
    captured = []
    monkeypatch.setattr(booking_mail.mailer, "send_email",
                         lambda to, subject, html, from_addr=None:
                         captured.append((to, subject, html, from_addr)))
    client = {"domain": "happynails.de", "business_name": "Happy Nails",
              "timezone": "Europe/Berlin"}
    with flask_app.test_request_context():
        booking_mail.send_booking_confirmation(client, _booking(), "sometoken")
    assert len(captured) == 1
    to, subject, html, from_addr = captured[0]
    assert to == "alice@example.com"
    assert from_addr == "noreply@happynails.de"
    assert "Happy Nails" in subject
    assert "/manage/sometoken" in html
    assert "Haircut" in html


def test_send_booking_confirmation_skips_when_contact_is_phone(monkeypatch):
    captured = []
    monkeypatch.setattr(booking_mail.mailer, "send_email",
                         lambda *a, **kw: captured.append((a, kw)))
    client = {"business_name": "Happy Nails", "timezone": "Europe/Berlin"}
    with flask_app.test_request_context():
        booking_mail.send_booking_confirmation(client, _booking(contact="0151-2345678"),
                                                 "sometoken")
    assert captured == []