r"""
core/fallback.py and the selector chains (2026-10-21): a renamed id falls
back to an alternative taken from the live DOM, and the log says so.

    python tests\test_fallback_selectors.py
"""

import io
import sys
import inspect
import pathlib
import contextlib

ROOT = pathlib.Path(__file__).resolve().parent.parent
sys.path.insert(0, str(ROOT / "src"))

from ecw_bot.core import fallback                        # noqa: E402
from ecw_bot.selectors.fallbacks import CHAINS           # noqa: E402
from ecw_bot.selectors import claim_form as form_sel      # noqa: E402
from ecw_bot.selectors import claim_lookup as lookup_sel  # noqa: E402
from ecw_bot.selectors import login as login_sel          # noqa: E402

CASES = []


def case(fn):
    CASES.append(fn)
    return fn


def _quiet(fn, *a):
    out = io.StringIO()
    with contextlib.redirect_stdout(out):
        result = fn(*a)
    return result, out.getvalue()


# ── the chains themselves ────────────────────────────────────────────────────

@case
def each_selector_is_its_chain_with_the_primary_first():
    pairs = [(login_sel.SEL_PASSWORD, login_sel.PASSWORD_CHAIN, "#passwordField"),
             (login_sel.SEL_LOGIN_BTN, login_sel.LOGIN_BTN_CHAIN, "#Login"),
             (lookup_sel.SEL_CLAIM_NO, lookup_sel.CLAIM_NO_CHAIN,
              "#claimLookupIpt10"),
             (lookup_sel.SEL_LOOKUP_BTN, lookup_sel.LOOKUP_BTN_CHAIN,
              "#btnclaimlookup"),
             (form_sel.SEL_CANCEL, form_sel.CANCEL_CHAIN, "#UBClaimBtn17"),
             (form_sel.SEL_CANCEL_DENTAL, form_sel.CANCEL_DENTAL_CHAIN,
              "#cancelDentalClaimButton"),
             (form_sel.SEL_PROGRESS_NOTES, form_sel.PROGRESS_NOTES_CHAIN,
              'button[ng-click="viewProgNote()"]')]
    for joined, chain, primary in pairs:
        assert chain[0] == primary and len(chain) >= 2, chain
        assert joined == ", ".join(chain), joined


@case
def every_alternative_is_plain_css(page):
    # Used in querySelectorAll / :has() too: Playwright-only syntax breaks
    # there. querySelectorAll throws on anything the browser cannot parse.
    page.set_content("<div></div>")
    for name, (_, chain) in CHAINS.items():
        for selector in chain:
            assert ":has-text" not in selector and "text=" not in selector, \
                (name, selector)
            page.evaluate("s => document.querySelectorAll(s)", selector)


@case
def cancel_alternatives_never_match_ok_or_the_x(page):
    page.set_content("""
      <div id="UBClaimDiv">
        <button id="UBClaimBtn3" class="close" ng-click="closeUBClaimScreen()">x</button>
        <button id="UBClaimBtn18" ng-click="saveAllData(true)">OK</button>
        <button id="NewCancelId" ng-click="closeUBClaimScreen()">Cancel</button>
      </div>
      <div class="modal" id="dentalClaim123">
        <button class="close" ng-click="closeDntl()">x</button>
        <button id="saveDental" ng-click="saveData()">OK</button>
        <button id="newDentalCancel" ng-click="closeDntl()">Cancel</button>
      </div>""")
    ub = page.locator(form_sel.SEL_CANCEL)
    assert ub.count() == 1 and ub.get_attribute("id") == "NewCancelId"
    dental = page.locator(form_sel.SEL_CANCEL_DENTAL)
    assert dental.count() == 1 \
        and dental.get_attribute("id") == "newDentalCancel"


# ── report() ─────────────────────────────────────────────────────────────────

@case
def the_primary_present_is_not_reported(page):
    fallback.reset()
    page.set_content('<input id="claimLookupIpt10" ng-model="_InvId">'
                     '<button id="btnclaimlookup">Lookup</button>')
    names, log = _quiet(fallback.report, page,
                        ["Claim No box", "Lookup button"], CHAINS)
    assert names == [] and log == "", log


@case
def a_renamed_primary_is_reported_once_with_what_matched(page):
    fallback.reset()
    page.set_content('<input id="newId" ng-model="_InvId">'
                     "<button id=\"b2\" ng-click=\"getClaimsListFromLookup"
                     "('lookup')\">Lookup</button>")
    names, log = _quiet(fallback.report, page,
                        ["Claim No box", "Lookup button"], CHAINS)
    assert names == ["Claim No box", "Lookup button"], names
    assert "#claimLookupIpt10 not found" in log \
        and 'matched input[ng-model="_InvId"]' in log \
        and "selectors/claim_lookup.py" in log, log
    names, log = _quiet(fallback.report, page, ["Claim No box"], CHAINS)
    assert names == [] and log == "", "once a run"


@case
def the_bot_still_acts_through_the_alternative(page):
    page.set_content('<input id="pw2" type="password">'
                     '<input id="btn2" type="button" value="Log In" '
                     'onclick="window.clicked = 1">')
    page.fill(login_sel.SEL_PASSWORD, "x")
    page.click(login_sel.SEL_LOGIN_BTN)
    assert page.input_value("#pw2") == "x"
    assert page.evaluate("window.clicked") == 1


@case
def nothing_shown_is_not_a_fallback(page):
    fallback.reset()
    page.set_content("<p>other page</p>")
    names, log = _quiet(fallback.report, page, list(CHAINS), CHAINS)
    assert names == [] and log == ""


def main() -> int:
    from playwright.sync_api import sync_playwright

    failures = 0
    with sync_playwright() as pw:
        browser = pw.chromium.launch(headless=True)
        page = browser.new_page()
        for fn in CASES:
            name = fn.__name__.replace("_", " ")
            try:
                if len(inspect.signature(fn).parameters) == 0:
                    fn()
                else:
                    fn(page)
                print(f"  ok    {name}")
            except AssertionError as exc:
                print(f"  FAIL  {name}: {exc}")
                failures += 1
            except Exception as exc:
                print(f"  ERROR {name}: {type(exc).__name__}: {exc}")
                failures += 1
        browser.close()

    print(f"\n{len(CASES) - failures}/{len(CASES)} passed")
    return 1 if failures else 0


if __name__ == "__main__":
    sys.exit(main())