"""Optional sections: the strip tool keeps the chosen sections and leaves nothing of the rest."""
import importlib.util
import json
import os
import re
import subprocess
import sys
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parents[1]
TEMPLATES = ROOT / "rpa-dashboard-no-ai" / "templates"
spec = importlib.util.spec_from_file_location("sections", TEMPLATES / "sections.py")
sections = importlib.util.module_from_spec(spec)
spec.loader.exec_module(sections)

TEMPLATE = (TEMPLATES / "dashboard.html").read_text(encoding="utf-8")
# Text each optional section brings into the page (markup, script or style).
TRACES = {
    "checkpoints": re.compile(r"checkpoint|cpstate|cp-", re.I),
    "admin": re.compile(r"admin", re.I),
    "login": re.compile(r"login_|sign in|sign out|logout", re.I),
}


def test_no_sections_leave_nothing_behind():
    html = sections.keep(TEMPLATE, [])
    for name, trace in TRACES.items():
        assert not trace.search(html), f"{name} left behind: {trace.search(html)[0]!r}"
    assert "OPTIONAL" not in html


@pytest.mark.parametrize("chosen", [["checkpoints"], ["admin"], ["login"], ["checkpoints", "admin", "login"]])
def test_chosen_sections_are_kept_and_the_rest_removed(chosen):
    html = sections.keep(TEMPLATE, chosen)
    for name, trace in TRACES.items():
        assert bool(trace.search(html)) == (name in chosen), name
    assert "OPTIONAL" not in html


def test_unknown_section_is_refused():
    with pytest.raises(SystemExit, match="checkpoints, admin, login"):
        sections.keep(TEMPLATE, ["charts"])


def test_page_without_sections_passes_the_page_check(tmp_path):
    fill = {"APP_NAME": "T", "APP_SUBTITLE": "", "LOGO_SRC": "", "API_BASE": "",
            "STEPS_JSON": json.dumps(["Start", "Work", "Done"]),
            "REPORT_COLUMNS_JSON": json.dumps([{"key": "item", "label": "Item"}, {"key": "status", "label": "Status"}])}
    page_file = tmp_path / "dashboard.html"
    page_file.write_text(re.sub(r"\{\{(\w+)\}\}", lambda m: fill[m[1]], sections.keep(TEMPLATE, [])), encoding="utf-8")
    r = subprocess.run([sys.executable, "-m", "pytest", str(ROOT / "tests" / "page_check"), "-q", "-p", "no:cacheprovider"],
                       env={**os.environ, "PAGE_CHECK_HTML": str(page_file)}, capture_output=True, text=True)
    assert r.returncode == 0, r.stdout[-2000:]