import re
from html.parser import HTMLParser
from pathlib import Path


def test_customer_email_patterns_are_exact():
    from app.customers.backend.router import _email_address_pattern, _email_domain_pattern

    address = re.compile(_email_address_pattern("info@example.com"))
    assert address.search("Info <info@example.com>")
    assert not address.search("otherinfo@example.com")

    domain = re.compile(_email_domain_pattern("example.com"))
    assert domain.search("person@example.com")
    assert not domain.search("person@example.com.evil.test")
    assert not domain.search("person@notexample.com")


def test_customer_detail_exposes_email_tab_and_supplier_service_checkbox():
    template = Path("app/customers/frontend/customer_detail.html").read_text(encoding="utf-8")
    assert 'href="#emails"' in template
    assert 'id="supplierServiceEnrolled"' in template
    assert "supplier_service_enrolled: checkbox.checked" in template
    assert "/emails?limit=${customerEmailsLimit}" in template


def test_customer_detail_tab_links_work_without_bootstrap_and_keep_deep_links():
    template = Path("app/customers/frontend/customer_detail.html").read_text(encoding="utf-8")

    assert "function initialiseCustomerTabs()" in template
    assert "function activateCustomerTab(tab" in template
    assert "event.stopImmediatePropagation();" in template
    assert "tab.dispatchEvent(new Event('shown.bs.tab'));" in template
    assert "showCustomerTab(tab)" in template
    assert "window.addEventListener('hashchange', openHashTab)" in template
    assert "history.replaceState(null, '', `${window.location.pathname}${window.location.search}${hash}`)" in template
    assert 'id="customerTabContent"' in template
    assert "#customerTabContent > .tab-pane {" in template
    assert "#customerTabContent > .tab-pane.active {" in template


def test_rendered_customer_tabs_keep_content_inside_the_correct_pane():
    from jinja2 import Environment, FileSystemLoader

    class DivTree(HTMLParser):
        def __init__(self):
            super().__init__()
            self.stack = []
            self.nodes = {}

        def handle_starttag(self, tag, attrs):
            attrs = dict(attrs)
            if attrs.get('id'):
                self.nodes[attrs['id']] = list(self.stack)
            if tag == 'div':
                self.stack.append(attrs.get('id'))

        def handle_endtag(self, tag):
            if tag == 'div' and self.stack:
                self.stack.pop()

    source = Path('app/customers/frontend/customer_detail.html').read_text()
    content = source.split('{% block content %}', 1)[1].split('{% endblock %}', 1)[0]
    rendered = Environment(loader=FileSystemLoader('app')).from_string(content).render(customer_id=1)
    tree = DivTree()
    tree.feed(rendered)
    targets = re.findall(r'data-bs-toggle="tab" href="#([^"]+)"', rendered)
    assert len(targets) == 20
    for target in targets:
        assert tree.nodes[target][-1] == 'customerTabContent', target
    for element in ['contactsContainer', 'contactsSearchInput', 'contactsResultCount']:
        assert 'contacts' in tree.nodes[element], element
    assert 'cases' in tree.nodes['customerCasesContainer']
    assert 'kontakt' in tree.nodes['customerKontaktContainer']