"""Drive Wonder Ink's print preview through one scenario, headless.

usage: wonderink-print-rig.py WONDERINK_COMMAND SCENARIO

Run by tools/lab/wonderink-print-check inside the lab, against the
command the package installed. It presses the preview's own buttons the
way a teacher would, and prints what happened; the check around it asks
CUPS what actually arrived.
"""
import importlib.machinery, importlib.util, sys, time, faulthandler, gc, os
faulthandler.enable()
path, scenario = sys.argv[1], sys.argv[2]
loader = importlib.machinery.SourceFileLoader("wonderink", path)
spec = importlib.util.spec_from_loader("wonderink", loader)
wi = importlib.util.module_from_spec(spec); loader.exec_module(wi)

from pathlib import Path
from PyQt6.QtCore import QTimer, QUrl
from PyQt6.QtGui import QPdfWriter, QPainter, QFont, QPageSize
from PyQt6.QtWidgets import QApplication
from PyQt6.QtWebEngineCore import QWebEngineProfile, QWebEngineSettings

notes = []
wi.notify = lambda s, b: (notes.append(s), print("NOTIFY", s, "|", b, flush=True))
app = QApplication(sys.argv)
# Wonder Ink's own profile, settings and all — not one of the rig's.
profile = wi.build_profile(app, "rig")
window = wi.WonderInk(profile)
profile.downloadRequested.connect(window.on_download)
window.resize(1280, 800); window.show()
t0 = time.monotonic()
def stamp(m): print(f"[{time.monotonic()-t0:6.2f}s] {m}", flush=True)

def lesson(view, title="Noahs Ark lesson"):
    view.setHtml(f"<html><head><title>{title}</title></head><body>" + "".join(
        f"<h1>{title}, part {i}</h1><p>{'Noah built an ark. ' * 80}</p>" for i in range(5)
    ) + "</body></html>", QUrl("https://app.wonderink.org/lesson"))

def worksheet(name="Colour the Ark"):
    d = wi.DOWNLOADS; d.mkdir(parents=True, exist_ok=True)
    p = d / f"{name}.pdf"
    w = QPdfWriter(str(p)); w.setPageSize(QPageSize(QPageSize.PageSizeId.Letter)); w.setResolution(300)
    pa = QPainter(w); pa.setFont(QFont("DejaVu Sans", 28))
    pa.drawText(200, 400, f"WORKSHEET {name} page one"); pa.drawRect(200, 600, 2000, 1500)
    w.newPage(); pa.drawText(200, 400, f"WORKSHEET {name} page two"); pa.end()
    return p

def when(cond, then, label, limit=30):
    start = time.monotonic()
    def poll():
        try: ok = cond()
        except Exception as e: ok = False
        if ok: return then()
        if time.monotonic() - start > limit:
            stamp(f"GAVE UP waiting for {label}"); app.exit(4); return
        QTimer.singleShot(100, poll)
    QTimer.singleShot(100, poll)

def preview(): return window._preview
def ready(): return preview() is not None and preview()._pdf is not None
def describe(d):
    return f"picture={d._picture_box.isVisible()} shown={(d._pdf, d._page) in d._images} pages={d._pages} printers={[d._printer.itemText(i) for i in range(d._printer.count())]} paper={d.paper()} colour_offered={d._colour.isVisible()} status={d._status.text()!r}"

def shown_gray():
    """Is the page the preview is drawing grey, pixel for pixel?"""
    pixmap = preview()._view._pixmap
    return None if pixmap is None else pixmap.toImage().allGray()

def keep_preview():
    import shutil
    out = Path("/tmp/rig-out"); out.mkdir(exist_ok=True)
    shutil.copy(preview()._pdf, out / "preview.pdf")

def toggles(sequence, then):
    """Color (0) and Black and white (1) in turn, as a teacher would, each shown before the next."""
    def step(i):
        if i == len(sequence): return then()
        start = time.monotonic(); preview()._colour.setCurrentIndex(sequence[i])
        def shown():
            d = preview()
            stamp(f"TOGGLE {i} want={'gray' if sequence[i] else 'colour'} took={time.monotonic() - start:.2f} "
                  f"pdf={d._pdf.name} source={d._source.name} page={d._page}/{d._pages} shown_gray={shown_gray()}")
            step(i + 1)
        when(ready, shown, f"toggle {i}")
    step(0)

def colour_lesson(view, title="Rainbow lesson"):
    # Backgrounds do not print, so the colour is in the words and the drawings.
    shapes = ("<svg width='600' height='120'><circle cx='60' cy='60' r='50' fill='#e00000'/>"
              "<rect x='130' y='10' width='200' height='100' fill='#0050e0'/>"
              "<circle cx='450' cy='60' r='50' fill='#00a000'/></svg>")
    view.setHtml(f"<html><head><title>{title}</title></head><body>" + "".join(
        f"<h1 style='color:#c00'>{title}, part {i}</h1>{shapes}"
        f"<p style='color:#060'>{'God put a rainbow in the sky. ' * 60}</p>" for i in range(4)
    ) + "</body></html>", QUrl("https://app.wonderink.org/rainbow"))

def colour_worksheet(name="Colour the Rainbow"):
    from PyQt6.QtGui import QColor
    d = wi.DOWNLOADS; d.mkdir(parents=True, exist_ok=True)
    p = d / f"{name}.pdf"
    w = QPdfWriter(str(p)); w.setPageSize(QPageSize(QPageSize.PageSizeId.Letter)); w.setResolution(300)
    pa = QPainter(w); pa.setFont(QFont("DejaVu Sans", 28))
    for page, colours in enumerate((("#e00000", "#ff9900"), ("#00a000", "#0050e0"))):
        if page: w.newPage()
        pa.setPen(QColor(colours[0])); pa.drawText(200, 400, f"WORKSHEET {name} page {page + 1}")
        pa.fillRect(200, 600, 1000, 800, QColor(colours[1]))
    pa.end()
    return p

def finish(code=0):
    stamp(f"RESULT notes={notes} preview_open={preview() is not None} tabs={window._tabs.count()}")
    QTimer.singleShot(1500, lambda: app.exit(code))

def press_print(then=None):
    d = preview(); stamp("PREVIEW " + describe(d))
    d._print.click()
    stamp(f"after Print: open={preview() is not None} status={d._status.text() if preview() else ''!r}")
    (then or finish)()

actions = {
    "web": lambda view: when(ready, press_print, "preview"),
    "cancel": lambda view: when(ready, lambda: (stamp("PREVIEW " + describe(preview())), preview()._cancel.click(), finish()), "preview"),
    "options": lambda view: when(ready, lambda: (
        preview()._which.setCurrentIndex(1), preview()._range.setText("2-3"),
        preview()._copies.setValue(2), preview()._colour.setCurrentIndex(1),
        when(ready, press_print, "black and white")), "preview"),
    "bad-range": lambda view: when(ready, lambda: (
        preview()._which.setCurrentIndex(1), preview()._range.setText("7"), preview()._print.click(),
        stamp(f"bad range: open={preview() is not None} status={preview()._status.text()!r}"),
        preview()._range.setText("1"), press_print()), "preview"),
    "broken": lambda view: when(ready, lambda: (
        preview()._printer.setCurrentText("Refusing"),
        stamp(f"switched to Refusing: paper={preview().paper()} status={preview()._status.text()!r}"),
        when(ready, lambda: (
            stamp(f"re-rendered on {preview().paper()}: pages={preview()._pages}"),
            preview()._print.click(),
            stamp(f"broken: open={preview() is not None} status={preview()._status.text()!r}"),
            preview()._cancel.click(), finish()), "re-render")), "preview"),
    "page-closes-itself": lambda view: when(ready, lambda: (
        view.page().runJavaScript("window.close()"),
        when(lambda: preview() and "closed" in preview()._status.text(), lambda: (
            stamp(f"after page closed: status={preview()._status.text()!r} print_enabled={preview()._print.isEnabled()}"),
            preview()._cancel.click(), finish()), "closed message")), "preview"),
    "close-window": lambda view: when(ready, lambda: (stamp("closing window with preview open"), window.close()), "preview"),
    "page-prints-again": lambda view: when(ready, lambda: (
        view.page().runJavaScript("window.print()"),
        QTimer.singleShot(800, lambda: (stamp(f"second request while open: still one preview={preview() is not None}"), press_print()))), "preview"),
}

SITE = "http://127.0.0.1:8094"

if scenario.startswith("bw-"):
    # bw-web: a colourful lesson, turned to page 2, Color and Black and white
    #   back and forth, then page 2 twice in black and white.
    # bw-pdf: a colourful worksheet, all of it, in black and white.
    # bw-colour-again: black and white, then back to Color, then Print.
    # bw-cancel: black and white, then Cancel.
    if scenario == "bw-pdf":
        window.open_pdf(colour_worksheet()); view = window.current()
    else:
        view = window.open_tab(); colour_lesson(view)
    def colour_first():
        stamp(f"COLOUR FIRST shown_gray={shown_gray()} pdf={preview()._pdf.name}")
        if scenario == "bw-web":
            preview()._turn(1)
            toggles([1, 0, 1, 0, 1], lambda: (
                preview()._which.setCurrentIndex(1), preview()._range.setText("2"),
                preview()._copies.setValue(2), keep_preview(), press_print()))
        elif scenario == "bw-pdf":
            toggles([1], lambda: (keep_preview(), press_print()))
        elif scenario == "bw-colour-again":
            toggles([1, 0], lambda: (keep_preview(), press_print()))
        else:
            toggles([1], lambda: (stamp("PREVIEW " + describe(preview())), preview()._cancel.click(), finish()))
    begin = lambda *_: (QTimer.singleShot(0, lambda: window.print_view(view)), when(ready, colour_first, "preview"))
    if scenario == "bw-pdf":
        QTimer.singleShot(2500, begin)
    else:
        view.loadFinished.connect(begin)
elif scenario.startswith("links:"):
    # links:follow        every kind of link on the lab's signed-in links page,
    #                     clicked in turn: what opens where, and what does not
    # links:pdf           a worksheet reached by a link, printed
    # links:image         a picture reached by a link, printed as a picture
    # links:image-rclick  the same picture, right-click Print image
    # links:tabs-print    several links opened, some closed, then the page printed
    from PyQt6.QtCore import QEvent, QPointF, Qt
    from PyQt6.QtGui import QMouseEvent
    from PyQt6.QtWidgets import QApplication as Application
    variant = scenario.split(":", 1)[1]
    links_view = window.open_tab(); links_view.load(QUrl(f"{SITE}/login"))
    def on_links():
        return links_view.url().path() == "/lesson" or links_view.url().path() == "/links"
    def click_in(view, selector, then, button=Qt.MouseButton.LeftButton):
        js = ("(function(){var e=document.querySelector(%r); if(!e) return null; e.scrollIntoView({block:'center'});"
              "var r=e.getBoundingClientRect(); return [r.x+r.width/2, r.y+r.height/2]})()" % selector)
        def at(xy):
            if not xy:
                stamp(f"NO {selector}"); return finish(6)
            zoom = view.zoomFactor(); point = QPointF(xy[0] * zoom, xy[1] * zoom)
            for kind, buttons in ((QEvent.Type.MouseButtonPress, button), (QEvent.Type.MouseButtonRelease, Qt.MouseButton.NoButton)):
                Application.sendEvent(view.focusProxy(), QMouseEvent(kind, point, QPointF(view.mapToGlobal(point)),
                                                                     button, buttons, Qt.KeyboardModifier.NoModifier))
            QTimer.singleShot(1500, then)
        view.page().runJavaScript(js, at)
    def tabs():
        return [window._tabs.widget(i).url().toString().replace(SITE, "") for i in range(window._tabs.count())]
    def report(label):
        current = window.current()
        stamp(f"LINK {label} tabs={len(tabs())} current={current.url().toString().replace(SITE, '')!r} "
              f"current_is_new={current is not links_view} worksheet={current in window._pdf_views}")
    def back_to_links():
        window._tabs.setCurrentWidget(links_view)
    def go_links(then):
        # From the lesson the site sent us to after signing in, to the links page, in this tab.
        links_view.load(QUrl(f"{SITE}/links"))
        when(lambda: links_view.url().path() == "/links", lambda: QTimer.singleShot(1200, then), "the links page")
    steps = []
    if variant == "follow":
        order = [("#blank", "text link, target=_blank, to a picture"), ("#external", "another site"),
                 ("#linked-picture", "a linked picture"), ("#pdf", "a worksheet PDF"),
                 ("#popup", "a lesson button that opens a window"), ("#button", "a lesson button"),
                 ("#anchor", "an in-page anchor"), ("#same", "a link with no target")]
        def next_link(i=0):
            if i == len(order):
                # Back, as the right-click menu's Back does, then close every tab the links opened.
                links_view.page().triggerAction(links_view.page().WebAction.Back)
                def closed_all():
                    report("after Back")
                    for view in [window._tabs.widget(j) for j in range(window._tabs.count())]:
                        if view is not links_view:
                            window.close_tab(window._tabs.indexOf(view))
                    QTimer.singleShot(800, lambda: (report("after closing the opened tabs"),
                                                    stamp(f"TABS {tabs()}"), finish()))
                return QTimer.singleShot(2000, closed_all)
            selector, label = order[i]
            back_to_links()
            click_in(links_view, selector, lambda: (report(f"{selector} ({label})"),
                     stamp(f"BUTTON {links_view.page().title()!r}") if selector == "#button" else None,
                     QTimer.singleShot(1500 if selector == "#pdf" else 200, lambda: next_link(i + 1))))
        when(on_links, lambda: go_links(lambda: (report("start"), next_link())), "signed in")
    elif variant in ("pdf", "image", "image-rclick", "tabs-print"):
        target = {"pdf": "#pdf", "image": "#blank", "image-rclick": "#blank", "tabs-print": "#blank"}[variant]
        def opened():
            report(f"{target} opened")
            view = window.current()
            if variant == "pdf":
                QTimer.singleShot(2500, lambda: (QTimer.singleShot(0, lambda: window.print_view(window.current())),
                                                 when(ready, lambda: (keep_preview(), press_print()), "worksheet preview")))
            elif variant == "image":
                QTimer.singleShot(0, lambda: window.print_view(view))
                when(lambda: ready() and preview()._picture is not None, lambda: (
                    stamp(f"PICTURE picture_box={preview()._picture_box.isVisible()} image={preview()._picture.width()}x{preview()._picture.height()}"),
                    keep_preview(), press_print()), "picture preview")
            elif variant == "image-rclick":
                def menu_up(menu):
                    items = [a.text() for a in menu.actions() if a.text()]
                    stamp(f"MENU {items}")
                    action = next(a for a in menu.actions() if a.text() == "Print image…")
                    menu.close()
                    when(lambda: ready() and preview()._picture is not None, lambda: (
                        stamp(f"PICTURE picture_box={preview()._picture_box.isVisible()} image={preview()._picture.width()}x{preview()._picture.height()}"),
                        keep_preview(), press_print()), "picture preview")
                    QTimer.singleShot(0, action.trigger)
                click_in(view, "img", lambda: when(lambda: Application.activePopupWidget() is not None,
                                                   lambda: menu_up(Application.activePopupWidget()), "menu"),
                         button=Qt.MouseButton.RightButton)
            else:
                # Three links opened, two of them closed again, then the page they came from printed.
                def more():
                    back_to_links()
                    click_in(links_view, "#external", lambda: (back_to_links(), click_in(links_view, "#linked-picture", close_two)))
                def close_two():
                    for view in [window._tabs.widget(j) for j in range(window._tabs.count())][-2:]:
                        window.close_tab(window._tabs.indexOf(view))
                    back_to_links(); report("before printing")
                    QTimer.singleShot(0, lambda: window.print_view(links_view))
                    when(ready, lambda: (keep_preview(), press_print()), "page preview")
                more()
        when(on_links, lambda: go_links(lambda: (back_to_links(), click_in(links_view, target, lambda: QTimer.singleShot(1500, opened)))), "signed in")
elif scenario.startswith("rclick"):
    # A lesson behind a sign-in, with pictures in it; a real right-click.
    #   rclick-page                       on the words: the page prints
    #   rclick-image:ID:SIZE:POSITION[:gray]  on a picture: that picture prints
    #   rclick-broken                     a picture that never loaded
    #   rclick-cancel                     a picture, then Cancel
    from PyQt6.QtCore import QEvent, QPointF, Qt
    from PyQt6.QtGui import QMouseEvent
    from PyQt6.QtWidgets import QApplication as Application
    parts = scenario.split(":")
    target = {"rclick-page": "words", "rclick-page-gray": "words", "rclick-broken": "broken",
              "rclick-cancel": "private-jpg"}.get(parts[0], parts[1] if len(parts) > 1 else "")
    clipboard = Application.clipboard()
    view = window.open_tab(); view.load(QUrl(f"{SITE}/login"))
    page_ready = []
    def poll_ready():
        if view.url().path() == "/lesson":
            view.page().runJavaScript("window.__ready === true", lambda ok: page_ready.append(1) if ok else None)
        if not page_ready: QTimer.singleShot(200, poll_ready)
    QTimer.singleShot(500, poll_ready)
    def right_click(then):
        js = ("(function(){var e=document.getElementById(%r);e.scrollIntoView({block:'center'});"
              "var r=e.getBoundingClientRect();return [r.x+r.width/2,r.y+r.height/2]})()" % target)
        def at(xy):
            zoom = view.zoomFactor(); x, y = xy[0] * zoom, xy[1] * zoom
            clipboard.setText("TEACHER'S TEXT, John 3:16")
            stamp(f"RCLICK {target} at {x:.0f},{y:.0f} since={time.time():.3f}")
            for kind, buttons in ((QEvent.Type.MouseButtonPress, Qt.MouseButton.RightButton),
                                  (QEvent.Type.MouseButtonRelease, Qt.MouseButton.NoButton)):
                Application.sendEvent(view.focusProxy(), QMouseEvent(
                    kind, QPointF(x, y), QPointF(view.mapToGlobal(QPointF(x, y))),
                    Qt.MouseButton.RightButton, buttons, Qt.KeyboardModifier.NoModifier))
            when(lambda: Application.activePopupWidget() is not None,
                 lambda: then(Application.activePopupWidget()), "menu")
        view.page().runJavaScript(js, at)
    def choose(menu, text, after):
        items = [a.text() for a in menu.actions() if a.text()]
        stamp(f"MENU {items}")
        action = next((a for a in menu.actions() if a.text() == text), None)
        menu.close()
        if action is None:
            stamp(f"NO {text!r} IN THE MENU"); return finish(5)
        after()
        QTimer.singleShot(0, action.trigger)
    def picture_ready():
        d = preview(); return d is not None and d._picture is not None and d._pdf is not None
    def clipboard_line():
        stamp(f"CLIPBOARD {clipboard.text()!r}")
    if parts[0] == "rclick-page":
        go = lambda: right_click(lambda m: choose(m, "Print page…", lambda: when(ready, lambda: (
            clipboard_line(), keep_preview(), press_print()), "page preview")))
    elif parts[0] == "rclick-page-gray":
        # The page with all its pictures, in black and white: the slow case.
        def gray_page():
            start = time.monotonic(); preview()._colour.setCurrentIndex(1)
            when(ready, lambda: (
                stamp(f"GRAY PAGE took={time.monotonic() - start:.1f} shown_gray={shown_gray()} pages={preview()._pages}"),
                keep_preview(), press_print()), "black and white", limit=70)
        go = lambda: right_click(lambda m: choose(m, "Print page…", lambda: when(ready, gray_page, "page preview")))
    elif parts[0] == "rclick-broken":
        go = lambda: right_click(lambda m: choose(m, "Print image…", lambda: when(
            lambda: preview() is not None and "could not be taken" in preview()._status.text(), lambda: (
                stamp(f"BROKEN status={preview()._status.text()!r} print_enabled={preview()._print.isEnabled()} "
                      f"pages={preview()._pages} picture={preview()._picture is not None}"),
                clipboard_line(), preview()._cancel.click(), finish()), "the picture failing", limit=15)))
    elif parts[0] == "rclick-cancel":
        go = lambda: right_click(lambda m: choose(m, "Print image…", lambda: when(picture_ready, lambda: (
            stamp("PREVIEW " + describe(preview())), clipboard_line(), preview()._cancel.click(), finish()),
            "picture preview")))
    else:
        _, _, size, position, *colour = parts
        def lay_out():
            d = preview()
            d._size.setCurrentIndex(d._size.findData(int(size)))
            d._place.choose(position.replace("-", " "))
            if colour == ["gray"]:
                d._colour.setCurrentIndex(1)
            QTimer.singleShot(900, lambda: when(ready, lambda: (
                stamp(f"PICTURE picture_box={d._picture_box.isVisible()} image={d._picture.width()}x{d._picture.height()} "
                      f"title={d._title!r} shown_gray={shown_gray()}"),
                clipboard_line(), keep_preview(), press_print()), "layout"))
        go = lambda: right_click(lambda m: choose(m, "Print image…", lambda: when(picture_ready, lay_out, "picture preview")))
    when(lambda: bool(page_ready), go, "the lesson and its pictures", limit=30)
elif scenario.startswith("picture:"):
    # picture:FILE:SIZE:POSITION:PAPER:FILL[:color]
    # Opens a picture on its own, chooses the layout with the preview's own
    # controls, keeps the exact PDF the preview showed, then prints it.
    _, name, size, position, paper, fill, *rest = scenario.split(":")
    view = window.open_tab(); view.load(QUrl(f"http://127.0.0.1:8089/{name}"))
    def ready_picture():
        d = preview()
        return d is not None and d._picture is not None and d._pdf is not None
    def choose():
        d = preview()
        d._size.setCurrentIndex(d._size.findData(int(size)))
        d._place.choose(position.replace("-", " "))
        d._turned.setCurrentIndex(d._turned.findData(paper))
        d._fill.setChecked(fill == "fill")
        if rest and rest[0] == "gray":
            d._colour.setCurrentIndex(1)
        # The layout settles (120 ms), then black and white if asked for.
        QTimer.singleShot(900, lambda: when(ready, keep_and_print, "layout"))
    def keep_and_print():
        import shutil
        d = preview()
        out = Path("/tmp/rig-out"); out.mkdir(exist_ok=True)
        shutil.copy(d._pdf, out / "preview.pdf")
        stamp(f"PICTURE picture_box={d._picture_box.isVisible()} size_enabled={d._size.isEnabled()} "
              f"image={d._picture.width()}x{d._picture.height()} labels={d._colour_label.text()!r},{d._colour.itemText(0)!r} "
              f"shown_gray={shown_gray()}")
        press_print()
    QTimer.singleShot(2500, lambda: (QTimer.singleShot(0, lambda: window.print_view(view)),
                                     when(ready_picture, choose, "picture preview")))
elif scenario == "dark-page":
    # A lesson page with a black background. Chrome does not print page
    # backgrounds unless asked, and neither may Wonder Ink.
    view = window.open_tab()
    view.setHtml("<html><head><title>Night sky</title></head><body style='background:#000;color:#fff'>"
                 + "<h1>Stars</h1>" + "<p>God made the stars. </p>" * 40 + "</body></html>",
                 QUrl("https://app.wonderink.org/night"))
    def keep_dark():
        import shutil
        out = Path("/tmp/rig-out"); out.mkdir(exist_ok=True)
        shutil.copy(preview()._pdf, out / "preview.pdf")
        press_print()
    view.loadFinished.connect(lambda ok: (QTimer.singleShot(0, lambda: window.print_view(view)),
                                          when(ready, keep_dark, "dark preview")))
elif scenario == "repeat":
    view = window.open_tab(); lesson(view); n = [0]
    def once():
        if n[0] == 5: return finish()
        n[0] += 1; QTimer.singleShot(0, lambda: window.print_view(view))
        when(ready, lambda: press_print(then=lambda: QTimer.singleShot(200, once)), "preview")
    view.loadFinished.connect(lambda ok: once() if n[0] == 0 else None)
elif scenario in ("pdf", "pdf-options"):
    window.open_pdf(worksheet()); view = window.current()
    if scenario == "pdf-options":
        actions["pdf-options"] = lambda view: when(ready, lambda: (
            preview()._which.setCurrentIndex(1), preview()._range.setText("2"),
            preview()._copies.setValue(3), preview()._colour.setCurrentIndex(1),
            when(ready, press_print, "black and white")), "preview")
    QTimer.singleShot(2500, lambda: (QTimer.singleShot(0, lambda: window.print_view(view)),
        actions[scenario if scenario == "pdf-options" else "web"](view)))
elif scenario == "pdf-viewer-button":
    # The viewer's own print button reaches the page as a print request.
    window.open_pdf(worksheet()); view = window.current()
    QTimer.singleShot(2500, lambda: (actions["web"](view), view.page().printRequested.emit()))
elif scenario == "inline":
    view = window.open_tab(); view.load(QUrl("http://127.0.0.1:8089/ark.pdf"))
    QTimer.singleShot(4000, lambda: (stamp(f"inline mime={window._mime.get(view)!r} shows_pdf={window._shows_pdf(view)}"),
        QTimer.singleShot(0, lambda: window.print_view(view)),
        when(ready, lambda: (stamp(f"worksheet tab opened: tabs={window._tabs.count()} current_is_pdf={window.current() in window._pdf_views}"), press_print()), "inline preview")))
else:
    if scenario == "page-closes-itself":
        lesson(window.open_tab(), "The other lesson")
    view = window.open_tab(); lesson(view)
    fired = []
    def go(ok):
        if fired: return
        fired.append(1); QTimer.singleShot(0, lambda: window.print_view(view)); actions[scenario](view)
    view.loadFinished.connect(go)

QTimer.singleShot(90000, lambda: (stamp("TIMEOUT"), app.exit(3)))
rc = app.exec()
stamp(f"EXIT {rc} scratch_left={sorted(p.name for p in Path(os.environ.get('XDG_RUNTIME_DIR','/tmp')).glob('wonderink-print-*'))}")
sys.exit(rc)