# -*- coding: utf-8 -*-
"""Tests: weißes Chat-Fenster beim Erststart + Peer-Wechsel-Latenz (minimaler Fix)."""

from __future__ import annotations

import inspect
import re
import unittest
from pathlib import Path

ROOT = Path(__file__).resolve().parent
HTML = (ROOT / "web" / "empfang.html").read_text(encoding="utf-8-sig")
WEBVIEW = (ROOT / "aza_empfang_webview.py").read_text(encoding="utf-8")


def _func_body(src: str, name: str) -> str:
    marker = f"function {name}"
    idx = src.find(marker)
    if idx < 0:
        return ""
    rest = src[idx + len(marker) :]
    nxt = rest.find("\nfunction ")
    return rest[:nxt] if nxt >= 0 else rest


class ChatWhiteFirstOpenTests(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.init_block = HTML[HTML.find("(async function init()") : HTML.find("})().catch(function(_eInitFatal)")]
        cls.pulse = _func_body(HTML, "pulseTick")
        start = HTML.find("window.addEventListener('focus'")
        end = HTML.find("});", start) + 3
        cls.focus_block = HTML[start:end]

    def test_boot_ok_not_immediately_after_auth_success(self):
        auth_idx = self.init_block.find("currentSession = me;")
        boot_early = self.init_block.find("empfangShellBootOk();", auth_idx)
        boot_ready_fn = self.init_block.find("empfangShellBootHideWhenUiReady")
        self.assertGreater(boot_ready_fn, 0, "Boot-Hide-When-Ready fehlt")
        if boot_early >= 0:
            self.assertGreater(boot_early, boot_ready_fn, "empfangShellBootOk zu frueh nach Auth")

    def test_boot_waits_for_users_and_shell_context(self):
        fn = self.init_block[self.init_block.find("empfangShellBootHideWhenUiReady") :]
        self.assertIn("await loadUsersFromServer();", fn)
        self.assertIn("await refreshDesktopShellContextFromServer(true);", fn)
        self.assertIn("empfangShellBootOk();", fn)
        lu = fn.find("await loadUsersFromServer();")
        ctx = fn.find("await refreshDesktopShellContextFromServer(true);")
        ok = fn.find("empfangShellBootOk();")
        self.assertLess(lu, ctx)
        self.assertLess(ctx, ok)

    def test_no_fixed_380ms_shell_context_timeout(self):
        self.assertNotIn("setTimeout(function() {\n      try {\n        refreshDesktopShellContextFromServer(true);", self.init_block)

    def test_health_probe_does_not_reload_on_boot_only(self):
        m = re.search(
            r"if state in \(([^)]+)\) or state\.startswith\(\"eval_err\"\):",
            WEBVIEW,
        )
        self.assertIsNotNone(m, "Health-Probe-Branch nicht gefunden")
        self.assertNotIn("boot_only", m.group(1))

    def test_health_probe_still_reloads_blank(self):
        self.assertIn('"blank"', WEBVIEW)


class ChatPeerSwitchLatencyTests(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        cls.pulse = _func_body(HTML, "pulseTick")
        start = HTML.find("window.addEventListener('focus'")
        end = HTML.find("});", start) + 3
        cls.focus_block = HTML[start:end]

    def test_peer_refresh_before_pulse_fetch(self):
        pr = self.pulse.find("empfangShellMaybeConsumePeerRefreshSignal")
        fetch = self.pulse.find("await apiFetch(pulseUrl)")
        self.assertGreater(pr, 0)
        self.assertGreater(fetch, 0)
        self.assertLess(pr, fetch)

    def test_minichat_in_pulse_peer_refresh_block(self):
        head = self.pulse[: self.pulse.find("await apiFetch")]
        self.assertIn("isMiniChatMode()", head)

    def test_minichat_in_pulse_context_throttle_block(self):
        tail = self.pulse[self.pulse.find("await apiFetch") :]
        self.assertIn("isMiniChatMode()", tail)

    def test_focus_consumes_peer_signal_before_debounce(self):
        deb = self.focus_block.find("_shellCtxFocusRefreshTs")
        pr = self.focus_block.find("empfangShellMaybeConsumePeerRefreshSignal")
        self.assertGreater(pr, 0)
        self.assertGreater(deb, 0)
        self.assertLess(pr, deb)

    def test_timing_simulation_peer_signal_not_blocked_by_pulse(self):
        """Peer-Refresh muss logisch vor blockierendem /pulse liegen (Timing-Proxy)."""
        lines = [ln.strip() for ln in self.pulse.splitlines() if ln.strip()]
        peer_line = next(i for i, ln in enumerate(lines) if "empfangShellMaybeConsumePeerRefreshSignal" in ln)
        pulse_line = next(i for i, ln in enumerate(lines) if "await apiFetch(pulseUrl)" in ln)
        self.assertLess(peer_line, pulse_line)


class ChatWhiteLatencyRegressionTests(unittest.TestCase):
    def test_existing_badge_tests_still_valid(self):
        kp = _func_body(HTML, "kontaktPanelOpenMessagesBadgeInHuelle")
        self.assertIn("focus_empfang_chat_shell", kp)
        self.assertIn("dm_open_peer_user_id", kp)

    def test_sso_and_office_ipc_unchanged(self):
        focus_src = inspect.getsource(
            __import__("aza_empfang_webview", fromlist=["EmpfangWebviewApi"]).EmpfangWebviewApi.focus_empfang_chat_shell
        )
        self.assertIn("request_office_open_empfang_chat_shell_ipc", focus_src)
        self.assertIn("touch_shell_peer_refresh_signal", focus_src)


if __name__ == "__main__":
    unittest.main()