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

SOLE OWNER of CHECKED-state, radio mutual-exclusion, ENABLED and focus.
Every test reads a widget's STATE BEFORE -> drives the real user path -> reads
AFTER -> verifies the transition, and PAIRS each flip with the app-authored
consequence it must cause (a radio flip must turn its sibling off; toggling the
Property Browser off must make the PB frame stop showing; toggling Snap Grid on
with no active workplane must pop the "no workplane" message dialog).

All before/after values were OBSERVED on the running reference (a pre-loaded box
with a translate/step group; active group = translate). Nothing is read from
source or constants -- a pixel-perfect dead shell that does not actually flip
CHECKED must fail here.

Mechanics (proven by recon):
- The menu-bar `check menu item` nodes have INVALID extents (-2147483648) -> they
  cannot be clicked by pixel. They are toggled IN PLACE with
  ``rb_atspi.do_action(item, "click")`` -- this flips CHECKED with no focus, no
  window activation and (except Snap Grid) no modal. This is the primary trigger.
- The tree updates after the action, so every item is RE-FETCHED before reading
  its post-state.
- Toggling "Show Snap Grid" ON with no active workplane also pops a modal
  "Message -- SolveSpace" alert; the autouse teardown force-closes any leftover
  Message-/Error- dialog and restores every toggled state so tests are
  order-independent.

Focus note: SolveSpace's OpenGL `drawing area` never reports the AT-SPI FOCUSED
state (verified on the reference -- no node in the graphics-window subtree ever
carries FOCUSED, and the frame does not carry ACTIVE), so a focus-transition test
would not reproduce. Per the lane guidance it is intentionally omitted rather than
shipped as a non-reproducing assertion.
"""

import time, subprocess

import pytest
from pytest_check import check

import rb_atspi


# --------------------------------------------------------------------------- #
# Embedded helpers (encode the proven SolveSpace state mechanics; module-local)
# --------------------------------------------------------------------------- #
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_frame(app):
    """The Property Browser top-level frame, or None if it is not present/showing
    (toggling Show Property Browser off removes it from the tree entirely)."""
    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 _checked(app, name):
    """CHECKED of a menu item, re-fetched fresh (the tree updates after actions)."""
    it = _item(app, name)
    return rb_atspi.is_checked(it) if it is not None else None


def _toggle(app, name, settle=0.45):
    """do_action('click') on a `check menu item` -> flips CHECKED in place. Returns
    the item node that was clicked (RE-FETCH via _item/_checked to read after)."""
    it = _item(app, name)
    if it is not None:
        rb_atspi.do_action(it, "click")
        time.sleep(settle)
    return it


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


# --------------------------------------------------------------------------- #
# Order-independence: known-good baseline before + after EACH test.
# Every toggle used below returns to its OBSERVED initial CHECKED value, so any
# test can run alone or in any order without a leftover flip / modal skewing it.
# --------------------------------------------------------------------------- #
_INITIAL = {
    "Use Perspective Projection": False,
    "Darken Inactive Solids": True,
    "Show Toolbar": True,
    "Show Property Browser": True,
    "Show Snap Grid": False,
}


def _restore_toggles(app):
    """Return each boolean toggle to its recorded initial CHECKED value (guarded,
    so an already-correct item is not clicked spuriously)."""
    for name, want in _INITIAL.items():
        it = _item(app, name)
        if it is not None and rb_atspi.is_checked(it) != want:
            rb_atspi.do_action(it, "click")
            time.sleep(0.4)
            _close_dialogs(app)  # Snap Grid restore can also pop the modal


def _restore_mm(app):
    """Dimension Units back to Millimeters (the reference default) if not already."""
    mm = _item(app, "Dimensions in Millimeters")
    if mm is not None and not rb_atspi.is_checked(mm):
        rb_atspi.do_action(mm, "click")
        time.sleep(0.4)


def _restore_all(app):
    _close_dialogs(app)
    _restore_toggles(app)
    _restore_mm(app)
    _close_dialogs(app)


@pytest.fixture(autouse=True, scope="module")
def _clean_module(app):
    """Establish the known baseline once before the module and once after it."""
    _restore_all(app)
    yield
    _restore_all(app)


@pytest.fixture(autouse=True)
def _clean_between(app):
    """Per-test teardown: never leave a modal open or a toggle flipped -- both would
    wedge / skew the next test on this shared single-instance app."""
    yield
    _restore_all(app)


# --------------------------------------------------------------------------- #
# Boolean CHECKED-flip transitions (paired with a consequence where one exists)
# --------------------------------------------------------------------------- #
@pytest.mark.rb(
    jump_kind="transition",
    expect="View>Use Perspective Projection CHECKED flips False->True (canvas switches to perspective projection)",
)
def test_use_perspective_projection_checks(app, rb):
    """View > Use Perspective Projection is a boolean toggle: CHECKED False -> True,
    which switches the 3D viewport from parallel to perspective projection."""
    _close_dialogs(app)
    it = _item(app, "Use Perspective Projection")
    assert it is not None, "View>Use Perspective Projection missing"

    before = rb_atspi.is_checked(it)
    check.is_false(before, "Perspective Projection should start unchecked on the reference")

    _toggle(app, "Use Perspective Projection")
    after = _checked(app, "Use Perspective Projection")
    # The verdict: the transition happened.
    check.is_true(after, "Use Perspective Projection did not become CHECKED after click")
    check.not_equal(before, after, "Perspective CHECKED did not change on toggle")
    # No modal is expected for this clean toggle.
    check.is_false(_dialog_present(app), "Perspective toggle unexpectedly opened a dialog")
    # (No screenshot: parallel vs perspective projection is not reliably distinguishable
    #  in this wireframe box view -- the CHECKED flip is the verdict.)


@pytest.mark.rb(
    jump_kind="transition",
    expect="View>Darken Inactive Solids CHECKED flips True->False (inactive solids stop being dimmed)",
)
def test_darken_inactive_solids_unchecks(app, rb):
    """View > Darken Inactive Solids is a boolean toggle that starts CHECKED (True):
    clicking it turns CHECKED False, so solids in inactive groups are no longer
    drawn dimmed."""
    _close_dialogs(app)
    it = _item(app, "Darken Inactive Solids")
    assert it is not None, "View>Darken Inactive Solids missing"

    before = rb_atspi.is_checked(it)
    check.is_true(before, "Darken Inactive Solids should start CHECKED on the reference")

    _toggle(app, "Darken Inactive Solids")
    after = _checked(app, "Darken Inactive Solids")
    check.is_false(after, "Darken Inactive Solids did not become UNCHECKED after click")
    check.not_equal(before, after, "Darken Inactive Solids CHECKED did not change on toggle")
    check.is_false(_dialog_present(app), "Darken toggle unexpectedly opened a dialog")
    # (No screenshot: this model renders as wireframe edges, so the dimming of inactive
    #  solid FACES is not visibly distinguishable here -- the CHECKED flip is the verdict.)


@pytest.mark.rb(
    jump_kind="transition",
    expect="View>Show Toolbar CHECKED flips True->False and the on-canvas toolbar disappears",
)
def test_show_toolbar_unchecks_and_hides_toolbar(app, rb):
    """View > Show Toolbar starts CHECKED (True): clicking it turns CHECKED False AND
    hides the left-edge on-canvas toolbar. The CHECKED flip is the verdict; no
    screenshot is attached here because the Property Browser window overlaps the
    graphics window's top-left in this layout (contaminating a toolbar-area crop with
    the PB's own icon row) -- the clean "full toolbar present vs absent" visual is
    instead captured, unobstructed, by the Show-Property-Browser test."""
    _close_dialogs(app)
    it = _item(app, "Show Toolbar")
    assert it is not None, "View>Show Toolbar missing"

    before = rb_atspi.is_checked(it)
    check.is_true(before, "Show Toolbar should start CHECKED on the reference")

    _toggle(app, "Show Toolbar")
    after = _checked(app, "Show Toolbar")
    check.is_false(after, "Show Toolbar did not become UNCHECKED after click")
    check.not_equal(before, after, "Show Toolbar CHECKED did not change on toggle")
    check.is_false(_dialog_present(app), "Show Toolbar toggle unexpectedly opened a dialog")


@pytest.mark.rb(
    jump_kind="transition",
    expect="View>Show Property Browser CHECKED True->False AND the 'Property Browser — SolveSpace' frame stops showing",
)
def test_show_property_browser_hides_pb_frame(app, rb, frame, results_dir):
    """View > Show Property Browser starts CHECKED (True): clicking it turns CHECKED
    False AND makes the separate 'Property Browser -- SolveSpace' top-level frame stop
    SHOWING / leave the tree. Both are asserted -- the frame vanishing is the
    app-authored consequence that discriminates from a bare toolkit toggle. The
    teardown toggles it back so the PB is restored for other tests."""
    _close_dialogs(app)
    it = _item(app, "Show Property Browser")
    assert it is not None, "View>Show Property Browser missing"

    # BEFORE: item checked and the PB frame is present + showing.
    before_checked = rb_atspi.is_checked(it)
    pb_before = _pb_frame(app)
    check.is_true(before_checked, "Show Property Browser should start CHECKED")
    check.is_true(
        pb_before is not None and rb_atspi.is_showing(pb_before),
        "Property Browser frame should be showing before the toggle",
    )

    _toggle(app, "Show Property Browser", settle=0.6)

    # AFTER: item unchecked AND the PB frame is gone (or no longer showing).
    after_checked = _checked(app, "Show Property Browser")
    pb_after = _pb_frame(app)
    pb_gone = pb_after is None or not rb_atspi.is_showing(pb_after)
    check.is_false(after_checked, "Show Property Browser did not become UNCHECKED")
    check.not_equal(before_checked, after_checked, "Show Property Browser CHECKED did not change")
    check.is_true(
        pb_gone,
        "consequence missing: the Property Browser frame is still showing after toggling it off",
    )

    # Screenshot cropped to the GRAPHICS window: with the PB hidden its overlaying
    # group-list panel is gone, so this region now shows the graphics window's OWN full
    # menu bar and complete left toolbar with the wireframe model -- a clean, judgeable
    # difference from the PB-shown state (which covers that corner with group-list text).
    rb_atspi.screenshot_assert(
        "test_show_property_browser_hides_pb_frame",
        "The SolveSpace graphics window with the Property Browser hidden: the top-left "
        "shows the application's own menu bar (File, Edit, View, New Group, Sketch, "
        "Constrain, Analyze, Help) and the FULL vertical column of tool icons down the "
        "left edge -- there is NO overlapping 'Property Browser' panel listing groups "
        "(no 'active / shown dof group-name' text, no g001/g002 group rows).",
        results_dir,
        window=frame,
    )

    # Restore explicitly (teardown also does this) and confirm the frame returns.
    _toggle(app, "Show Property Browser", settle=0.6)
    check.is_true(
        rb_atspi.wait_for(
            lambda: (_pb_frame(app) is not None) and rb_atspi.is_showing(_pb_frame(app)),
            timeout=4.0,
        ),
        "Property Browser frame did not reappear after toggling Show Property Browser back on",
    )


@pytest.mark.rb(
    jump_kind="transition",
    expect="View>Show Snap Grid CHECKED False->True and (no active workplane) a 'Message — SolveSpace' alert appears",
)
def test_show_snap_grid_checks_and_warns_no_workplane(app, rb):
    """View > Show Snap Grid starts CHECKED (False): clicking it turns CHECKED True AND
    -- because no workplane is active in this model -- pops a modal 'Message --
    SolveSpace' alert ('No workplane is active, so the grid will not appear.'). Both the
    CHECKED flip and the app-authored warning dialog are asserted. Teardown closes the
    dialog and restores CHECKED False."""
    _close_dialogs(app)
    it = _item(app, "Show Snap Grid")
    assert it is not None, "View>Show Snap Grid missing"

    before = rb_atspi.is_checked(it)
    check.is_false(before, "Show Snap Grid should start UNCHECKED on the reference")

    _toggle(app, "Show Snap Grid", settle=0.6)
    after = _checked(app, "Show Snap Grid")
    check.is_true(after, "Show Snap Grid did not become CHECKED after click")
    check.not_equal(before, after, "Show Snap Grid CHECKED did not change on toggle")

    # Consequence: with no active workplane the toggle-on pops the warning alert.
    got_dialog = rb_atspi.wait_for(lambda: _dialog_present(app), timeout=4.0)
    check.is_true(
        got_dialog,
        "expected 'Message — SolveSpace' no-workplane alert after enabling Snap Grid",
    )

    # (No screenshot: the on-canvas grid does not actually appear -- the warning says so
    #  -- and the alert text is covered by the menu/text lanes; the CHECKED flip + the
    #  alert-appeared assertion are the verdict here.)
    _close_dialogs(app)


# --------------------------------------------------------------------------- #
# Radio mutual-exclusion transitions (the strongest state tests)
# --------------------------------------------------------------------------- #
@pytest.mark.rb(
    jump_kind="transition",
    expect="Clicking 'Dimensions in Inches' -> Inches CHECKED True AND 'Dimensions in Millimeters' CHECKED True->False (radio exclusion)",
)
def test_dimension_units_radio_inches_excludes_mm(app, rb):
    """Dimension Units is a radio group. On the reference 'Dimensions in Millimeters'
    is CHECKED and the others are not. Clicking 'Dimensions in Inches' must turn Inches
    CHECKED True AND -- the app-authored mutual exclusion -- turn Millimeters CHECKED
    False. BOTH sides of the exclusion are asserted; teardown restores Millimeters."""
    _close_dialogs(app)
    _restore_mm(app)
    mm = _item(app, "Dimensions in Millimeters")
    inch = _item(app, "Dimensions in Inches")
    assert mm is not None and inch is not None, "Dimension Units radio items missing"

    # BEFORE: Millimeters checked, Inches not.
    check.is_true(rb_atspi.is_checked(mm), "Millimeters should start CHECKED")
    check.is_false(rb_atspi.is_checked(inch), "Inches should start UNCHECKED")

    _toggle(app, "Dimensions in Inches")

    # AFTER: Inches checked, Millimeters cleared (mutual exclusion).
    inch_after = _checked(app, "Dimensions in Inches")
    mm_after = _checked(app, "Dimensions in Millimeters")
    check.is_true(inch_after, "clicked 'Dimensions in Inches' did not become CHECKED")
    check.is_false(
        mm_after,
        "radio exclusion failed: 'Dimensions in Millimeters' stayed CHECKED after selecting Inches",
    )

    # Restore Millimeters and confirm the exclusion runs the other way too.
    _toggle(app, "Dimensions in Millimeters")
    check.is_true(_checked(app, "Dimensions in Millimeters"), "Millimeters did not restore")
    check.is_false(
        _checked(app, "Dimensions in Inches"),
        "restoring Millimeters did not clear Inches (exclusion should be symmetric)",
    )


@pytest.mark.rb(
    jump_kind="transition",
    expect="Clicking 'Dimensions in Meters' -> Meters CHECKED True AND 'Dimensions in Millimeters' CHECKED True->False (radio exclusion)",
)
def test_dimension_units_radio_meters_excludes_mm(app, rb):
    """A second, distinct member of the same Dimension Units radio group: clicking
    'Dimensions in Meters' turns Meters CHECKED True AND clears 'Dimensions in
    Millimeters' -- proving the exclusion holds for the group generally, not just the
    Inches pairing. Teardown restores Millimeters."""
    _close_dialogs(app)
    _restore_mm(app)
    mm = _item(app, "Dimensions in Millimeters")
    meters = _item(app, "Dimensions in Meters")
    assert mm is not None and meters is not None, "Dimension Units radio items missing"

    check.is_true(rb_atspi.is_checked(mm), "Millimeters should start CHECKED")
    check.is_false(rb_atspi.is_checked(meters), "Meters should start UNCHECKED")

    _toggle(app, "Dimensions in Meters")

    meters_after = _checked(app, "Dimensions in Meters")
    mm_after = _checked(app, "Dimensions in Millimeters")
    check.is_true(meters_after, "clicked 'Dimensions in Meters' did not become CHECKED")
    check.is_false(
        mm_after,
        "radio exclusion failed: 'Dimensions in Millimeters' stayed CHECKED after selecting Meters",
    )

    _toggle(app, "Dimensions in Millimeters")
    check.is_true(_checked(app, "Dimensions in Millimeters"), "Millimeters did not restore")
    check.is_false(
        _checked(app, "Dimensions in Meters"),
        "restoring Millimeters did not clear Meters (exclusion should be symmetric)",
    )