"""AT-SPI menu (navigation) lane for SolveSpace (parametric 2D/3D CAD, GTK3 + OpenGL).

This lane tests MENUS AS NAVIGATION: triggering a menu command produces an
APP-AUTHORED EFFECT that identifies WHERE it navigated to --

  * a NEW modal DIALOG appears, identified by its CONTENT (reach), or
  * the OPAQUE OpenGL Property Browser canvas navigates to a specific text
    SCREEN (transition; verified by screenshot because the PB content is not in
    the AT-SPI tree).

It deliberately does NOT own CHECKED flips (state lane) and does NOT assert the
computed value inside a dialog (computation lane) -- here the verdict is the
NAVIGATION IDENTITY: which dialog opened, or which PB screen was reached.

All effects below were OBSERVED on the running reference (a pre-loaded box with a
translate/step group; active group = translate). Nothing is read from source.

PROVEN MECHANICS (verified at author time on the running reference):
- Menu-bar `check menu item` nodes have INVALID extents (-2147483648) -> cannot be
  pixel-clicked. Commands fire via ``do_action(item,"click")`` (PB-navigating /
  inline) or ``do_action_safe(item,"click")`` (modal-opener About -- bounded so a
  nested dialog loop can't hang the module).
- Modal message dialogs are role ``alert`` / name "Information", SEPARATE X windows
  titled "Message -- SolveSpace" with readable `label` children + an OK push button.
  They appear in the tree, so ``rb_showing``/``rb_reach`` prove the reach (the
  "Information" alert surface newly appears); the labels prove it is the RIGHT dialog.
- The Property Browser is an OPAQUE OpenGL text canvas: "PB navigated to screen X"
  is verified by ``screenshot_assert`` (VLM) cropped to the PB frame, NOT by reading
  tree text -- expected and correct for this app.
- Pressing Escape in the PB window navigates it back to the group-list HOME screen
  (verified) -- the teardown uses this to reset the PB between tests.
"""

import os, time, subprocess, gi

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

import pytest  # noqa: E402
from pytest_check import check  # noqa: E402

import rb_atspi  # noqa: E402
from rb_atspi import rb_showing, rb_reach  # noqa: E402


# --------------------------------------------------------------------------- #
# Embedded helpers (encode the proven SolveSpace menu-navigation mechanics)
# --------------------------------------------------------------------------- #
def _gw(app):
    """The graphics-window frame (owns the menu bar), not the Property Browser."""
    for i in range(app.get_child_count()):
        f = app.get_child_at_index(i)
        nm = f.get_name() or ""
        if "SolveSpace" in nm and "Property Browser" not in nm:
            return f
    return rb_atspi.get_main_frame(app)


def _pb(app):
    """The Property Browser top-level frame, or None if it is not present."""
    for i in range(app.get_child_count()):
        f = app.get_child_at_index(i)
        if "Property Browser" in (f.get_name() or ""):
            return f
    return None


def _item(app, name):
    """A `check menu item` in the graphics window's menu bar, by its plain
    (mnemonic-stripped) visible label."""
    return rb_atspi.find_first(_gw(app), role="check menu item", name=name)


def _alert_labels(app):
    """All non-empty label texts across every showing `alert` (Message/Error)
    dialog currently owned by the app."""
    out = []
    for i in range(app.get_child_count()):
        f = app.get_child_at_index(i)
        if f.get_role_name() == "alert" and rb_atspi.is_showing(f):
            for l in rb_atspi.find_all(f, role="label"):
                if l.get_name():
                    out.append(l.get_name())
    return out


def _labels_text(app):
    """All alert label text joined (with spaces collapsed) so identity substrings
    match regardless of how a multi-line message is split across labels or wrapped
    with embedded newlines (e.g. 'GNU\\nGeneral Public License')."""
    return " ".join(" ".join(_alert_labels(app)).split())


# --- modal message/error dialog handling (separate X windows) --------------- #
def _dialog_wids(app):
    """X window ids of the app's open Message-/Error- dialogs (separate windows)."""
    pid = app.get_process_id()
    r = subprocess.run(
        ["xdotool", "search", "--pid", str(pid)], capture_output=True, text=True
    )
    wids = []
    for w in r.stdout.split():
        nm = subprocess.run(
            ["xdotool", "getwindowname", w], capture_output=True, text=True
        ).stdout.strip()
        if nm.startswith("Message —") or nm.startswith("Error —"):
            wids.append(w)
    return wids


def _dialog_present(app):
    """True while any Message-/Error- dialog X window is open."""
    return len(_dialog_wids(app)) > 0


def _close_dialogs(app, rounds=6):
    """Force-close any open Message-/Error- dialog by activating its X window and
    clicking OK's live bottom-center (AT-SPI OK extents go stale under overlap)."""
    for _ in range(rounds):
        wids = _dialog_wids(app)
        if not wids:
            break
        for w in wids:
            g = subprocess.run(
                ["xdotool", "getwindowgeometry", "--shell", w],
                capture_output=True,
                text=True,
            ).stdout
            d = dict(l.split("=") for l in g.strip().splitlines() if "=" in l)
            if not d:
                continue
            subprocess.run(["xdotool", "windowactivate", "--sync", w])
            time.sleep(0.2)
            cx = int(d["X"]) + int(d["WIDTH"]) // 2
            cy = int(d["Y"]) + int(d["HEIGHT"]) - 22
            subprocess.run(["xdotool", "mousemove", str(cx), str(cy), "click", "1"])
            time.sleep(0.3)


def _raise_dialogs(app):
    """Activate/raise any open Message-/Error- dialog so a full-screen grab captures
    it on top. do_action-opened dialogs can open UN-raised behind the GW."""
    for w in _dialog_wids(app):
        subprocess.run(["xdotool", "windowactivate", "--sync", w])
    time.sleep(0.4)


def _wait_alert(app, timeout=6.0):
    """Poll until at least one alert label is readable; True if a dialog appeared."""
    return rb_atspi.wait_for(lambda: len(_alert_labels(app)) > 0, timeout=timeout)


# --- graphics window / accelerator (for keyboard-triggered menu commands) ---- #
def _gw_wid(app):
    """X window id of the graphics window (not the PB, not a dialog)."""
    pid = app.get_process_id()
    r = subprocess.run(
        ["xdotool", "search", "--pid", str(pid)], capture_output=True, text=True
    )
    for w in r.stdout.split():
        nm = subprocess.run(
            ["xdotool", "getwindowname", w], capture_output=True, text=True
        ).stdout.strip()
        if (
            nm.endswith("— SolveSpace")
            and "Property Browser" not in nm
            and not nm.startswith(("Message", "Error"))
        ):
            return w
    return None


def _pb_wid(app):
    """X window id of the Property Browser window."""
    pid = app.get_process_id()
    r = subprocess.run(
        ["xdotool", "search", "--pid", str(pid)], capture_output=True, text=True
    )
    for w in r.stdout.split():
        nm = subprocess.run(
            ["xdotool", "getwindowname", w], capture_output=True, text=True
        ).stdout.strip()
        if nm.startswith("Property Browser"):
            return w
    return None


def _accel(app, keys):
    """Focus+raise the graphics window, hover the canvas, then send an accelerator
    (e.g. 'ctrl+shift+v'). The key is dropped unless the GW is focused AND the
    pointer is over its canvas first."""
    wid = _gw_wid(app)
    if wid:
        subprocess.run(["xdotool", "windowactivate", "--sync", wid, "windowfocus", wid])
        time.sleep(0.4)
    subprocess.run(["xdotool", "mousemove", "400", "400"])
    time.sleep(0.2)
    subprocess.run(["xdotool", "key", "--clearmodifiers", keys])
    time.sleep(0.8)


def _pb_home(app):
    """Reset the Property Browser to its group-list HOME screen. Pressing Escape in
    the PB window returns it home (verified on the reference). Best-effort; each
    PB-navigation test also triggers its OWN navigation, so a stale screen would be
    overwritten regardless."""
    w = _pb_wid(app)
    if w:
        subprocess.run(["xdotool", "windowactivate", "--sync", w])
        time.sleep(0.2)
        subprocess.run(["xdotool", "key", "--clearmodifiers", "Escape"])
        time.sleep(0.4)


# --------------------------------------------------------------------------- #
# Order-independence: no leftover dialog, PB back home, before + after each test
# --------------------------------------------------------------------------- #
@pytest.fixture(autouse=True, scope="module")
def _clean_module(app):
    _close_dialogs(app)
    _pb_home(app)
    yield
    _close_dialogs(app)
    _pb_home(app)


@pytest.fixture(autouse=True)
def _clean_between(app):
    """Per-test teardown on this shared single-instance app: close any Message-/Error-
    dialog and return the PB to its home screen so the next test starts clean."""
    yield
    _close_dialogs(app)
    _pb_home(app)


# --------------------------------------------------------------------------- #
# A. Menu command -> a NEW DIALOG appears (reach)
# --------------------------------------------------------------------------- #
@pytest.mark.rb(
    jump_kind="reach",
    expect="Help>About opens the 'Information' alert whose text says SolveSpace is free software under the GNU General Public License",
)
def test_about_menu_opens_about_dialog(app, rb, results_dir):
    """Help > About navigates to the About dialog: a new modal 'Information' alert
    window materialises (the graphics-window menu is the source; the alert is the
    target). Asserted BOTH ways: (a) rb_reach proves the 'Information' alert surface
    newly APPEARED, and (b) its labels contain the About-identifying text
    ('free software' / 'GNU General Public License') so it is the RIGHT dialog, not
    just any alert. The version number is intentionally NOT asserted (it drifts)."""
    _close_dialogs(app)
    it = _item(app, "About")
    assert it is not None, "Help>About menu item missing"

    before = rb_showing(app)
    rb.enter("about dialog")  # a modal opens -> a real surface crossing (depth 1)
    # About opens a modal -> do_action_safe (bounded), never a plain blocking do_action.
    rb_atspi.do_action_safe(it, "click")

    got = _wait_alert(app, timeout=6.0)
    check.is_true(got, "About produced no 'Information' dialog")
    after = rb_showing(app)

    # (a) The reach: the alert surface appeared that was not there before.
    check.is_true(
        rb_reach(before, after, target="Information"),
        "About did not open a new 'Information' alert surface (reach not proven)",
    )
    check.is_true(_dialog_present(app), "no 'Message — SolveSpace' dialog window after About")

    # (b) It is the ABOUT dialog specifically (identity), tolerant to label splitting
    #     and the embedded newline in 'GNU\nGeneral Public License'.
    text = _labels_text(app)
    check.is_in(
        "free software", text,
        f"About dialog does not mention 'free software'; labels={text!r}",
    )
    check.is_in(
        "General Public License", text,
        f"About dialog does not mention the GNU General Public License; labels={text!r}",
    )

    _raise_dialogs(app)
    rb_atspi.screenshot_assert(
        "test_about_menu_opens_about_dialog",
        "A SolveSpace 'Message' dialog (the About box) whose body text states that "
        "SolveSpace is free software you may modify and redistribute under the terms "
        "of the GNU General Public License (GPL) version 3 or later, mentions NO "
        "WARRANTY, and shows a copyright line '© 2008-... Jonathan Westhues and other "
        "authors', with a single OK button.",
        results_dir,
    )
    _close_dialogs(app)


@pytest.mark.rb(
    jump_kind="reach",
    expect="Analyze>Measure Volume (Ctrl+Shift+V) opens the 'Information' alert reporting 'The volume of the solid model is:'",
)
def test_measure_volume_menu_opens_volume_dialog(app, rb, results_dir):
    """Analyze > Measure Volume, triggered by its keyboard accelerator into the
    focused graphics window, navigates to a result dialog: a new modal 'Information'
    alert appears (reach) whose text identifies it as the VOLUME report ('the volume
    of the solid model'). This lane proves the menu navigation opened the RIGHT
    dialog; the exact computed magnitude/unit is the computation lane's job."""
    _close_dialogs(app)
    assert _item(app, "Measure Volume") is not None, "Analyze>Measure Volume missing"

    before = rb_showing(app)
    rb.enter("measure volume dialog")  # accelerator opens a modal -> depth 1
    _accel(app, "ctrl+shift+v")

    got = _wait_alert(app, timeout=6.0)
    if not got:
        pytest.skip("Measure Volume produced no dialog in this environment (focus)")
    after = rb_showing(app)

    # The reach: a new 'Information' alert surface appeared.
    check.is_true(
        rb_reach(before, after, target="Information"),
        "Measure Volume did not open a new 'Information' alert surface (reach not proven)",
    )
    check.is_true(_dialog_present(app), "no 'Message — SolveSpace' dialog window after Measure Volume")

    # Identity (not the value): it is the VOLUME dialog.
    text = _labels_text(app)
    check.is_in(
        "volume of the solid model", text,
        f"opened dialog is not the volume report; labels={text!r}",
    )

    _raise_dialogs(app)
    rb_atspi.screenshot_assert(
        "test_measure_volume_menu_opens_volume_dialog",
        "A SolveSpace 'Message' dialog opened from Analyze > Measure Volume, reading "
        "'The volume of the solid model is:' followed by a value, and mentioning that "
        "curved surfaces have been approximated as triangles, with an OK button.",
        results_dir,
    )
    _close_dialogs(app)


# --------------------------------------------------------------------------- #
# B. Menu command -> the Property Browser navigates to a specific SCREEN
#    (opaque OpenGL canvas -> the screenshot is the verdict; marked transition)
# --------------------------------------------------------------------------- #
@pytest.mark.rb(
    jump_kind="transition",
    expect="Edit>Line Styles... navigates the Property Browser to the Line Styles screen (a 'color / style-name' list: s001-#def-active-grp, s002-#def-construction, ...)",
)
def test_line_styles_navigates_property_browser(app, rb, frame, results_dir):
    """Edit > Line Styles... navigates the Property Browser (an opaque OpenGL text
    canvas) to its Line Styles screen. Because the PB content is not exposed in the
    AT-SPI tree, the app-authored effect is verified by screenshot: the PB now shows
    a 'color / style-name' header over a list of named styles. Programmatic guards
    confirm the command was reachable and produced NO error dialog (a failed
    navigation would); the screenshot carries the identity verdict. Teardown returns
    the PB home via Escape."""
    _close_dialogs(app)
    _pb_home(app)
    it = _item(app, "Line Styles...")
    assert it is not None, "Edit>Line Styles... missing"
    check.is_true(rb_atspi.is_enabled(it), "Line Styles... is not enabled")
    check.is_true(_pb(app) is not None, "Property Browser frame is not present")

    rb.enter("line styles screen")  # navigating the PB is a real surface crossing
    rb_atspi.do_action(it, "click")
    time.sleep(0.8)

    # This navigates the PB in place; it must NOT pop an error dialog.
    check.is_false(
        _dialog_present(app),
        "Line Styles... unexpectedly opened a dialog instead of navigating the PB",
    )

    w = _pb_wid(app)
    if w:  # bring the PB to the front so the crop captures the new screen on top
        subprocess.run(["xdotool", "windowraise", w])
        time.sleep(0.3)
    rb_atspi.screenshot_assert(
        "test_line_styles_navigates_property_browser",
        "The SolveSpace Property Browser panel showing its LINE STYLES screen: a "
        "two-column header 'color   style-name' above a vertical list of style rows, "
        "each with a small colored swatch on the left and a name like "
        "'s001-#def-active-grp', 's002-#def-construction', 's003-#def-inactive-grp', "
        "'s004-#def-datum', 's005-#def-solid-edge'. NOT a group list of "
        "g001/g002/g003 rows.",
        results_dir,
        window=_pb(app),
    )
    _pb_home(app)


@pytest.mark.rb(
    jump_kind="transition",
    expect="Edit>View Projection... navigates the Property Browser to the '3D VIEW PARAMETERS' screen (overall scale factor, origin, projection right/up/out vectors)",
)
def test_view_projection_navigates_property_browser(app, rb, frame, results_dir):
    """Edit > View Projection... navigates the Property Browser to its projection /
    view-parameters screen (opaque OpenGL canvas). Verified by screenshot: the PB now
    shows a '3D VIEW PARAMETERS' screen with the overall scale factor, the origin, and
    the projection right/up/out basis vectors. Programmatic guards confirm reachability
    and that no error dialog popped. Teardown returns the PB home."""
    _close_dialogs(app)
    _pb_home(app)
    it = _item(app, "View Projection...")
    assert it is not None, "Edit>View Projection... missing"
    check.is_true(rb_atspi.is_enabled(it), "View Projection... is not enabled")
    check.is_true(_pb(app) is not None, "Property Browser frame is not present")

    rb.enter("view projection screen")
    rb_atspi.do_action(it, "click")
    time.sleep(0.8)

    check.is_false(
        _dialog_present(app),
        "View Projection... unexpectedly opened a dialog instead of navigating the PB",
    )

    w = _pb_wid(app)
    if w:
        subprocess.run(["xdotool", "windowraise", w])
        time.sleep(0.3)
    rb_atspi.screenshot_assert(
        "test_view_projection_navigates_property_browser",
        "The SolveSpace Property Browser panel showing its VIEW PROJECTION screen, "
        "headed '3D VIEW PARAMETERS', listing an 'overall scale factor' with a "
        "px/mm value and a 'set to full scale' link, an 'origin (maps to center of "
        "screen)' with an (x, y, z) coordinate, and a 'projection onto screen' block "
        "with 'right', 'up' and 'out' rows each holding a 3-number vector, plus a "
        "'perspective factor (0 for parallel)' line. NOT a group list.",
        results_dir,
        window=_pb(app),
    )
    _pb_home(app)


@pytest.mark.rb(
    jump_kind="transition",
    expect="Edit>Configuration... navigates the Property Browser to the Configuration screen (user color r,g,b table, chord tolerance in percents, max piecewise linear segments)",
)
def test_configuration_navigates_property_browser(app, rb, frame, results_dir):
    """Edit > Configuration... navigates the Property Browser to its Configuration
    screen (opaque OpenGL canvas). Verified by screenshot: the PB now shows a
    'user color (r, g, b)' table of numbered swatches with [change] links, a 'chord
    tolerance (in percents)' setting, and 'max piecewise linear segments'.
    Programmatic guards confirm reachability and no error dialog. Teardown returns
    the PB home."""
    _close_dialogs(app)
    _pb_home(app)
    it = _item(app, "Configuration...")
    assert it is not None, "Edit>Configuration... missing"
    check.is_true(rb_atspi.is_enabled(it), "Configuration... is not enabled")
    check.is_true(_pb(app) is not None, "Property Browser frame is not present")

    rb.enter("configuration screen")
    rb_atspi.do_action(it, "click")
    time.sleep(0.8)

    check.is_false(
        _dialog_present(app),
        "Configuration... unexpectedly opened a dialog instead of navigating the PB",
    )

    w = _pb_wid(app)
    if w:
        subprocess.run(["xdotool", "windowraise", w])
        time.sleep(0.3)
    rb_atspi.screenshot_assert(
        "test_configuration_navigates_property_browser",
        "The SolveSpace Property Browser panel showing its CONFIGURATION screen: a "
        "'user color (r, g, b)' table with numbered rows (#0, #1, #2, ...) each "
        "showing a colored swatch, three decimal r,g,b components, and a '[change]' "
        "link; below it a 'chord tolerance (in percents)' value with a triangle "
        "count, and a 'max piecewise linear segments' value with a '[change]' link. "
        "NOT a group list of g001/g002/g003 rows.",
        results_dir,
        window=_pb(app),
    )
    _pb_home(app)