"""Shared AT-SPI primitives for RecreationBench pytest tests.

Tier-1 testgen ships ONE of these (uploaded next to the tests) instead of a
bespoke ~500-line ``atspi_helpers.py`` per app. Every generic primitive the
per-app helpers reinvented lives here — tree search, state, actions, real input
(xdotool), waits, and the VLM ``screenshot_assert``. The only app-specific bit,
"which frame is my app", is parameterized: ``get_app()`` resolves the target by
the ``RB_APP_NAME`` the runner already detected, so the SAME module works for
every app.

Tests import this and use pytest-check for soft assertions; result collection is
handled by ``conftest.py`` (which writes the legacy ``<module>_results.json`` so
the frozen-manifest scorer is unchanged). App-specific *workflows* (open a file,
expand a tree) stay in the test file or a local fixture — only the primitives are
shared.
"""

from __future__ import annotations

import json
import os
import subprocess
import time

import gi

gi.require_version("Atspi", "2.0")
from gi.repository import Atspi  # noqa: E402

# Bound EVERY AT-SPI method call. A synchronous action (do_action) on an item that opens
# a MODAL runs the app's handler on its single main thread; if that handler enters a
# nested event loop (GTK gtk_dialog_run, Qt QDialog::exec, wx modal), it does not return
# until the dialog closes, so the D-Bus reply never comes and the call HANGS the whole
# pytest module. libatspi has a global call timeout (default ~800ms) but it is not
# reliably applied to actions that enter a nested loop; set it explicitly so a blocked
# call raises fast (and the test is dropped) instead of wedging the module. Reads are
# well under this; only nested-loop blocks hit it. (call_timeout_ms, app_startup_ms)
try:
    Atspi.set_timeout(1500, 15000)
except Exception:  # older libatspi without set_timeout
    pass

# Re-export the kit's true-jump helpers so a test file has ONE import surface:
# ``from rb_atspi import rb_showing, rb_reach``. (Depth is measured via the ``rb``
# pytest fixture in conftest.py; app attach is the ``app`` fixture — both by RB_APP_NAME.)
try:  # noqa: E402
    from rb_testgen_kit import rb_reach, rb_showing  # noqa: F401
except Exception:  # pragma: no cover - kit absent; primitives below still work
    pass


# --------------------------------------------------------------------------- #
# App / frame resolution
# --------------------------------------------------------------------------- #
def _desktop():
    return Atspi.get_desktop(0)


def get_app(name: str | None = None, timeout: float = 25.0):
    """Return the AT-SPI application Accessible for the app under test.

    ``name`` defaults to the ``RB_APP_NAME`` the runner detected (a process-tree
    match). Falls back to the single non-shell app on the bus if the name does
    not match, so tests are robust to a11y-name drift.
    """
    name = name or os.environ.get("RB_APP_NAME", "")
    deadline = time.time() + timeout
    ignore = {"", "gnome-shell", "at-spi2-registryd", "mutter-x11-frames"}
    last_apps: list = []
    while time.time() < deadline:
        desktop = _desktop()
        apps = []
        for i in range(desktop.get_child_count()):
            app = desktop.get_child_at_index(i)
            if app is None:
                continue
            an = app.get_name() or ""
            if an in ignore:
                continue
            apps.append(app)
            if name and (an == name or name in an or an in name):
                return app
        last_apps = apps
        time.sleep(0.4)
    # name never matched: if exactly one real app is on the bus, use it.
    if len(last_apps) == 1:
        return last_apps[0]
    for app in last_apps:
        if (app.get_name() or "").strip():
            return app
    return None


def get_main_frame(app=None):
    """Return the app's top-level frame (or the app node itself)."""
    if app is None:
        app = get_app()
    if app is None:
        return None
    for i in range(app.get_child_count()):
        c = app.get_child_at_index(i)
        if c is not None and (c.get_role_name() or "") in ("frame", "window"):
            return c
    return app


# --------------------------------------------------------------------------- #
# Tree traversal / finding
# --------------------------------------------------------------------------- #
def walk(node, cb, depth: int = 0, maxdepth: int = 60):
    if node is None or depth > maxdepth:
        return
    try:
        cb(node, depth)
    except Exception:
        pass
    try:
        n = node.get_child_count()
    except Exception:
        return
    for i in range(n):
        try:
            c = node.get_child_at_index(i)
        except Exception:
            continue
        walk(c, cb, depth + 1, maxdepth)


def find_all(
    root, role: str | None = None, name: str | None = None, name_sub: str | None = None
):
    out: list = []

    def cb(n, _d):
        try:
            if role is not None and (n.get_role_name() or "") != role:
                return
            nm = n.get_name() or ""
            if name is not None and nm != name:
                return
            if name_sub is not None and name_sub not in nm:
                return
            out.append(n)
        except Exception:
            pass

    walk(root, cb)
    return out


def find_first(
    root, role: str | None = None, name: str | None = None, name_sub: str | None = None
):
    res = find_all(root, role=role, name=name, name_sub=name_sub)
    return res[0] if res else None


def cell_names(root):
    return [(c.get_name() or "") for c in find_all(root, role="table cell")]


def roles_present(root):
    seen: set[str] = set()
    walk(root, lambda n, _d: seen.add(n.get_role_name() or ""))
    return seen


def widget_count(root):
    n = [0]
    walk(root, lambda _n, _d: n.__setitem__(0, n[0] + 1))
    return n[0]


# --------------------------------------------------------------------------- #
# State
# --------------------------------------------------------------------------- #
def _state(n, st) -> bool:
    try:
        return n.get_state_set().contains(st)
    except Exception:
        return False


def is_checked(n) -> bool:
    return _state(n, Atspi.StateType.CHECKED)


def is_showing(n) -> bool:
    return _state(n, Atspi.StateType.SHOWING)


def is_enabled(n) -> bool:
    return _state(n, Atspi.StateType.ENABLED)


def is_visible(n) -> bool:
    return _state(n, Atspi.StateType.VISIBLE)


def is_focused(n) -> bool:
    return _state(n, Atspi.StateType.FOCUSED)


def get_text(n) -> str:
    try:
        return Atspi.Text.get_text(n, 0, Atspi.Text.get_character_count(n))
    except Exception:
        try:
            return n.get_name() or ""
        except Exception:
            return ""


# --------------------------------------------------------------------------- #
# Actions
# --------------------------------------------------------------------------- #
def _action_iface(n):
    try:
        return n.get_action_iface()
    except Exception:
        return None


def action_names(n) -> list[str]:
    ai = _action_iface(n)
    if ai is None:
        return []
    try:
        return [ai.get_action_name(i) for i in range(ai.get_n_actions())]
    except Exception:
        return []


def do_action(n, want: str) -> bool:
    ai = _action_iface(n)
    if ai is None:
        return False
    try:
        for i in range(ai.get_n_actions()):
            if (ai.get_action_name(i) or "").lower() == want.lower():
                ai.do_action(i)
                return True
    except Exception:
        return False
    return False


def do_action_safe(n, want: str) -> bool:
    """Fire an AT-SPI action, tolerating a modal-opener. do_action on an item that opens
    a modal blocks in the app's nested event loop; Atspi.set_timeout (module init) now
    bounds that to ~1.5s, after which the call raises and we swallow it. PREFER
    open_modal()/click_node() (async xdotool) for anything that opens a dialog/menu —
    this is only the fallback. Returns True if the action was issued."""
    ai = _action_iface(n)
    if ai is None:
        return False
    idx = None
    try:
        for i in range(ai.get_n_actions()):
            if (ai.get_action_name(i) or "").lower() == want.lower():
                idx = i
                break
    except Exception:
        return False
    if idx is None:
        return False
    try:
        ai.do_action(idx)
    except Exception:
        pass
    return True


def press(n) -> bool:
    return do_action(n, "Press") or do_action(n, "click")


def toggle(n) -> bool:
    return do_action(n, "Toggle") or press(n)


def show_menu(n) -> bool:
    """Open a menu WITHOUT blocking. A menu-open can enter a grab/nested loop, so drive
    it with a synthetic mouse click (xdotool, async — returns immediately) rather than a
    synchronous do_action. Falls back to the (now timeout-bounded) do_action_safe."""
    if click_node(n) is not None:
        return True
    return do_action_safe(n, "ShowMenu") or do_action_safe(n, "click")


def open_modal(n) -> bool:
    """Trigger something that may spawn a MODAL dialog (File>Open, a menu item that
    opens a dialog) WITHOUT hanging. Uses a synthetic xdotool click (async) so the app
    can enter its modal nested loop while the test proceeds to read/dismiss the new
    window. NEVER use do_action for a modal-opener: do_action runs the handler
    synchronously and blocks in the nested loop until the modal closes (see the
    Atspi.set_timeout note at module top). After open_modal(), read the dialog via
    AT-SPI (bounded reads) and dismiss with press_escape()/key()."""
    return click_node(n) is not None


# --------------------------------------------------------------------------- #
# Real input via xdotool (needed to SELECT rows / reach webviews)
# --------------------------------------------------------------------------- #
def xdo(*args) -> bool:
    try:
        subprocess.run(
            ["xdotool", *[str(a) for a in args]],
            timeout=8,
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
        )
        return True
    except Exception:
        return False


def center(n):
    try:
        ext = n.get_extents(Atspi.CoordType.SCREEN)
        if ext.width <= 0 or ext.height <= 0:
            return None
        return (ext.x + ext.width // 2, ext.y + ext.height // 2)
    except Exception:
        return None


def click_node(n, button: int = 1):
    """Real mouse click at the node's on-screen center (selects rows, focuses
    webviews — synthetic AT-SPI focus often won't)."""
    c = center(n)
    if c is None:
        return None
    xdo("mousemove", c[0], c[1], "click", button)
    return c


def key(*keys) -> bool:
    return xdo("key", *keys)


def press_escape() -> None:
    key("Escape")


def type_text(text: str, delay: int = 20) -> bool:
    return xdo("type", "--delay", str(delay), text)


def close_all_dialogs(rounds: int = 3) -> None:
    for _ in range(rounds):
        press_escape()
        time.sleep(0.15)


def focus_app_window(app=None, settle: float = 0.4) -> bool:
    """Raise + keyboard-focus the app's top-level X11 window so xdotool clicks/typing
    reliably land in it. A freshly-relaunched window is frequently NOT window-manager
    focused yet — synthetic input then goes nowhere or to the wrong window, which is the
    cold-baseline flakiness (the warm run_live instance was focused long ago, so it hid
    this). Called once by the ``app`` fixture when the app is acquired, so a cold
    run_baseline behaves like the warm run_live. Best-effort — never raises, never fails a
    test; activating the already-mapped main window before any modal is opened is benign.
    """
    pid = None
    try:
        if app is None:
            app = get_app()
        if app is not None:
            pid = app.get_process_id()
    except Exception:
        pid = None

    def _search(*args) -> str | None:
        try:
            r = subprocess.run(
                ["xdotool", "search", "--onlyvisible", *args],
                capture_output=True,
                text=True,
                timeout=5,
            )
            wids = [w for w in r.stdout.split() if w.strip()]
            return wids[-1] if wids else None
        except Exception:
            return None

    wid = _search("--pid", str(pid)) if pid else None
    if (
        wid is None
    ):  # pid-owned window not found (e.g. window owned by a child); fall back to title
        name = os.environ.get("RB_APP_NAME", "")
        wid = _search("--name", name) if name else None
    if wid is None:
        return False
    try:
        subprocess.run(
            ["xdotool", "windowactivate", "--sync", wid, "windowfocus", wid],
            timeout=6,
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
        )
        time.sleep(settle)
        return True
    except Exception:
        return False


# --------------------------------------------------------------------------- #
# Waits (replaces time.sleep spam — poll for the observation instead)
# --------------------------------------------------------------------------- #
def wait_for(predicate, timeout: float = 6.0, interval: float = 0.25) -> bool:
    deadline = time.time() + timeout
    while time.time() < deadline:
        try:
            if predicate():
                return True
        except Exception:
            pass
        time.sleep(interval)
    return False


def wait_node(root_fn, timeout: float = 6.0, **find_kw):
    """Poll until a node matching find_kw appears; return it or None."""
    out = [None]

    def _p():
        root = root_fn() if callable(root_fn) else root_fn
        n = find_first(root, **find_kw)
        out[0] = n
        return n is not None

    wait_for(_p, timeout=timeout)
    return out[0]


# --------------------------------------------------------------------------- #
# VLM screenshot assertion (opaque/visual cores: WebKit/QtWebEngine/canvas)
# --------------------------------------------------------------------------- #
def _results_dir() -> str:
    return os.environ.get("RB_RESULTS_DIR") or os.environ.get("RESULTS_DIR") or "."


def screenshot_assert(
    test_name: str, description: str, results_dir: str | None = None, window=None
):
    """Capture a PNG (optionally cropped to ``window``'s extents) and record a
    natural-language assertion for the downstream VLM judge. Writes to both the
    append-only jsonl (authoritative key set, survives per-module truncation) and
    the tolerant assertions.json dict — exactly the contract phase-2 consumes.
    """
    rd = results_dir or _results_dir()
    ss_dir = os.path.join(rd, "screenshots")
    os.makedirs(ss_dir, exist_ok=True)
    fname = f"{test_name}.png"
    path = os.path.join(ss_dir, fname)
    ok = False
    for cmd in (
        ["import", "-window", "root", path],
        ["scrot", "-o", path],
        ["gnome-screenshot", "-f", path],
    ):
        try:
            subprocess.run(
                cmd, timeout=15, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL
            )
            if os.path.exists(path) and os.path.getsize(path) > 0:
                ok = True
                break
        except Exception:
            continue
    if ok and window is not None:
        try:
            ext = window.get_extents(Atspi.CoordType.SCREEN)
            if ext.width > 0 and ext.height > 0:
                subprocess.run(
                    [
                        "convert",
                        path,
                        "-crop",
                        f"{ext.width}x{ext.height}+{ext.x}+{ext.y}",
                        path,
                    ],
                    timeout=15,
                    stdout=subprocess.DEVNULL,
                    stderr=subprocess.DEVNULL,
                )
        except Exception:
            pass
    if not ok:
        return False
    try:
        with open(os.path.join(ss_dir, "screenshot_asserts.jsonl"), "a") as f:
            f.write(
                json.dumps({"screenshot": fname, "description": description}) + "\n"
            )
    except Exception:
        pass
    try:
        aj = os.path.join(ss_dir, "assertions.json")
        data = {}
        if os.path.exists(aj):
            try:
                data = json.load(open(aj))
            except Exception:
                data = {}
        data[test_name] = {"screenshot": fname, "description": description}
        json.dump(data, open(aj, "w"))
    except Exception:
        pass
    return True