"""AX button behaviour tests for massCode (Electron/Vue snippet manager)."""
import json
import os
import re
import subprocess
import time

import pytest
import rb_testgen_kit as kit

RESULTS_DIR = os.environ.get("RESULTS_DIR", os.path.dirname(os.path.abspath(__file__)))


def screenshot_assert(test_name, description, results_dir=None):
    results_dir = results_dir or RESULTS_DIR
    ss_dir = os.path.join(results_dir, "screenshots")
    os.makedirs(ss_dir, exist_ok=True)
    ss_path = os.path.join(ss_dir, f"{test_name}.png")
    try:
        subprocess.run(["screencapture", "-x", ss_path], timeout=5)
    except Exception:
        pass
    assertions_file = os.path.join(ss_dir, "assertions.json")
    assertions = {}
    if os.path.exists(assertions_file):
        try:
            with open(assertions_file) as f:
                assertions = json.load(f)
        except Exception:
            assertions = {}
    assertions[f"{test_name}.png"] = description
    with open(assertions_file, "w") as f:
        json.dump(assertions, f, indent=2)


def _enable_web_ax(ax, timeout=10.0):
    """Chromium/Electron builds its web-content AX tree only once an AT announces itself."""
    from ApplicationServices import AXUIElementSetAttributeValue
    try:
        AXUIElementSetAttributeValue(ax._app_ref, "AXEnhancedUserInterface", True)
    except Exception:
        pass
    deadline = time.time() + timeout
    while time.time() < deadline:
        if ax.find(role="label", max_results=1, max_depth=16):
            return True
        time.sleep(0.25)
    return False


def app_ready(ax):
    """MANDATORY bring-up: build the web AX tree and foreground the app."""
    _enable_web_ax(ax)
    try:
        from AppKit import NSRunningApplication
        a = NSRunningApplication.runningApplicationWithProcessIdentifier_(int(ax.get_pid()))
        if a is not None:
            a.activateWithOptions_(1 << 1)
    except Exception:
        pass
    time.sleep(0.4)
    return ax


def labels(ax):
    return [l.value for l in ax.find(role="label", max_results=250, max_depth=26) if l.value]


def field(ax, placeholder):
    for t in ax.find(role="text_field", max_results=15, max_depth=26):
        if (t.name or "") == placeholder:
            return t
    return None


def named_button(ax, name):
    for b in ax.find(role="button", max_results=40, max_depth=26):
        if (b.name or "").strip() == name.strip():
            return b
    return None


def text_areas(ax):
    return ax.find(role="text_area", max_results=8, max_depth=26)


def press_labelled_group(ax, text):
    for g in ax.find(role="group", max_results=600, max_depth=26):
        if "AXPress" not in (g.actions or []):
            continue
        labs = ax.find(role="label", root_id=g.id, max_results=3, max_depth=2)
        if any((l.value or "").strip() == text for l in labs):
            return ax.action(g.id, "AXPress")
    return False


def webarea(ax):
    w = ax.find(role="webarea", max_results=1, max_depth=6)
    return w[0] if w else None


def webarea_buttons(ax):
    """(x, y, element) for every button inside the web content, DOM order."""
    wa = webarea(ax)
    if wa is None:
        return []
    out = []
    for b in ax.find(role="button", root_id=wa.id, max_results=30, max_depth=26):
        p = ax.get(b.id, ["AXPosition"]).get("AXPosition", "") or ""
        try:
            x = float(p.split("x:")[1].split(" ")[0])
            y = float(p.split("y:")[1].split(" ")[0])
        except Exception:
            x = y = -1.0
        out.append((x, y, b))
    return out


def snippet_header_buttons(ax):
    """The snippet-header tool buttons, left→right. For a Plain Text snippet there are
    exactly 4: [screenshot, code-preview, add-description, new-fragment]."""
    wa = webarea(ax)
    if wa is None:
        return []
    name_field = field(ax, "Type snippet name")
    if name_field is None:
        return []
    p = ax.get(name_field.id, ["AXPosition"]).get("AXPosition", "") or ""
    try:
        ny = float(p.split("y:")[1].split(" ")[0])
        nx = float(p.split("x:")[1].split(" ")[0])
    except Exception:
        return []
    out = [(x, y, b) for (x, y, b) in webarea_buttons(ax)
           if abs(y - ny) < 40 and x > nx]
    return [b for (_x, _y, b) in sorted(out, key=lambda t: t[0])]


def add_snippet_button(ax):
    """The '+' at the top of the snippet-list column: the button that sits on the same
    row as the Search box and to its right."""
    s = field(ax, "Search...")
    if s is None:
        return None
    p = ax.get(s.id, ["AXPosition"]).get("AXPosition", "") or ""
    try:
        sy = float(p.split("y:")[1].split(" ")[0])
        sx = float(p.split("x:")[1].split(" ")[0])
    except Exception:
        return None
    cands = [(x, y, b) for (x, y, b) in webarea_buttons(ax)
             if abs(y - sy) < 25 and x > sx]
    cands.sort(key=lambda t: t[0])
    return cands[0][2] if cands else None


def menu_el(ax, path):
    items = ax.find(role="menu_bar_item", name=path[0], max_results=3, max_depth=3)
    if not items:
        return None
    cur = items[0]
    for lbl in path[1:]:
        kids = ax.find(role="menu_item", name=lbl, root_id=cur.id, max_results=3, max_depth=3)
        if not kids:
            return None
        cur = kids[0]
    return cur


def rb_enter_menu(ax, path, settle=1.2):
    """NAVIGATION: fire a menu item, crossing into whatever surface it opens."""
    el = menu_el(ax, path)
    if el is None:
        return False
    ok = ax.action(el.id, "AXPress")
    time.sleep(settle)
    return ok


def rb_enter_close_surface(ax, settle=1.3):
    """NAVIGATION: leave Preferences / Developer Tools / Presentation."""
    wa = webarea(ax)
    if wa is None:
        return False
    btns = ax.find(role="button", root_id=wa.id, max_results=5, max_depth=24)
    if not btns:
        return False
    ok = ax.action(btns[0].id, "AXPress")
    time.sleep(settle)
    return ok


def rb_enter_devtool(ax, tool_name, settle=1.3):
    """NAVIGATION: open Developer Tools (if needed) and select a tool in its left rail."""
    if "Developer Tools" not in labels(ax):
        rb_enter_menu(ax, ["massCode", "Developer Tools…"], settle=1.6)
    ok = press_labelled_group(ax, tool_name)
    time.sleep(settle)
    return ok


def rb_enter_new_snippet(ax):
    """NAVIGATION: create + select a fresh snippet (the editor surface)."""
    return rb_enter_menu(ax, ["File", "New Snippet"], settle=1.6)


def go_home(ax):
    for _ in range(3):
        ls = labels(ax)
        if "Preferences" in ls or "Developer Tools" in ls or "1 / 0" in ls:
            if rb_enter_close_surface(ax):
                continue
        break
    if "Inbox" not in labels(ax):
        press_labelled_group(ax, "LIBRARY")
        time.sleep(0.8)
    return ax


# ─────────────────────────── extra navigation helpers ───────────────────────────
# Named rb_enter_* so the depth audit can see the surfaces each test crosses.

def rb_enter_sidebar_row(ax, row_name, settle=1.0):
    """NAVIGATION: select a sidebar collection (Inbox / Trash / All Snippets / …).
    Located by the row's visible LABEL, never by index."""
    ok = press_labelled_group(ax, row_name)
    time.sleep(settle)
    return ok


def rb_enter_preferences(ax):
    """NAVIGATION: open the Preferences/Settings surface from the app menu.
    Tries the macOS 13+ 'Settings…' wording first, then the classic 'Preferences…'."""
    for label in ("Settings…", "Preferences…", "Settings...", "Preferences..."):
        if rb_enter_menu(ax, ["massCode", label], settle=1.6):
            return True
    return False


def press_named(ax, name, settle=0.8):
    """AXPress a button located by its accessible NAME (devtools buttons have names)."""
    b = named_button(ax, name)
    if b is None:
        return False
    ok = ax.action(b.id, "AXPress")
    time.sleep(settle)
    return ok


def button_names(ax):
    return [(b.name or "") for b in ax.find(role="button", max_results=40, max_depth=26)]


def out_value(ax, index=1, timeout=2.0):
    """Poll the devtools output text_area until it is non-empty (reactive tools lag)."""
    deadline = time.time() + timeout
    val = None
    while time.time() < deadline:
        tas = text_areas(ax)
        if len(tas) > index:
            val = tas[index].value
            if (val or "").strip():
                return val
        time.sleep(0.2)
    return val


def set_case_input(ax, text):
    tas = text_areas(ax)
    assert len(tas) >= 2, f"expected an input+output text_area pair, found {len(tas)}"
    ax.set_value(tas[0].id, text)
    time.sleep(0.4)
    return tas


# ══════════════════════════════════ REACH ══════════════════════════════════

class TestSnippetCreationButtons:
    """The '+' button in the snippet-list column must MATERIALISE a snippet editor."""

    @pytest.mark.rb(depth=1, jump_kind="reach",
                    expect="snippet name box + language dropdown + Line 1, Column 1 appear")
    def test_add_snippet_button_creates_snippet(self, ax):
        app_ready(ax)
        go_home(ax)
        # Trash is empty -> the editor column collapses to 'No Snippet Selected',
        # giving a deterministic SOURCE surface for the reach proof.
        assert rb_enter_sidebar_row(ax, "Trash"), "sidebar 'Trash' row is not pressable"
        before = kit.rb_showing(ax)
        rb_enter_sidebar_row(ax, "Inbox")
        b = add_snippet_button(ax)
        assert b is not None, "no '+' add-snippet button beside the Search box"
        assert "AXPress" in (b.actions or []), "add-snippet button exposes no AXPress action"
        assert ax.action(b.id, "AXPress"), "AXPress on the add-snippet button failed"
        time.sleep(1.6)
        after = kit.rb_showing(ax)
        screenshot_assert(
            "buttons_new_snippet",
            "massCode home shell after pressing the '+' button at the top of the middle "
            "snippet-list column (right of the 'Search...' box): the right editor pane no "
            "longer says 'No Snippet Selected' but shows a new snippet — a 'Type snippet "
            "name' box filled with 'Untitled snippet', an 'Add Tag' row, an empty code "
            "editor, a 'Plain Text' language dropdown and the 'Line 1, Column 1' status. "
            "A new 'Untitled snippet' row is listed in the snippet-list column.",
        )
        assert kit.rb_reach(before, after,
                            target="Type snippet name", source="No Snippet Selected"), (
            "'+' did not open a snippet editor (name box never appeared / "
            "'No Snippet Selected' never went away)")


class TestSnippetHeaderToolButtons:
    """The 4 icon-only tool buttons to the right of the snippet name box."""

    @pytest.mark.rb(depth=2, jump_kind="reach",
                    expect="screenshot palette with Background / Dark Mode and PNG / SVG buttons")
    def test_screenshot_preview_button_opens_palette(self, ax):
        app_ready(ax)
        go_home(ax)
        assert rb_enter_new_snippet(ax), "File ▸ New Snippet did not fire"
        hb = snippet_header_buttons(ax)
        assert len(hb) >= 4, f"expected >=4 snippet-header tool buttons, found {len(hb)}"
        before = kit.rb_showing(ax)
        assert ax.action(hb[0].id, "AXPress"), "AXPress on the screenshot button failed"
        time.sleep(1.5)
        after = kit.rb_showing(ax)
        screenshot_assert(
            "buttons_screenshot_palette",
            "massCode snippet screenshot palette: the editor pane's tag row, 'Plain Text' "
            "language dropdown and 'Line N, Column M' status are replaced by a screenshot "
            "export panel showing a 'Background' colour control, a 'Dark Mode' switch and "
            "two export buttons labelled 'PNG' and 'SVG' (not pressed — they write files). "
            "The left sidebar and the snippet list are still visible.",
        )
        assert kit.rb_reach(before, after, target="Dark Mode", source="Add Tag"), (
            "the screenshot tool button did not swap the editor footer for the "
            "screenshot palette")
        names = button_names(ax)
        assert any("PNG" in n for n in names), f"no PNG export button in {names}"
        assert any("SVG" in n for n in names), f"no SVG export button in {names}"
        # Restore the editor (never press PNG/SVG — they open a save panel).
        hb2 = snippet_header_buttons(ax)
        ax.action((hb2[0] if hb2 else hb[0]).id, "AXPress")
        time.sleep(0.8)

    @pytest.mark.rb(depth=2, jump_kind="reach",
                    expect="'Add description' text area appears")
    def test_add_description_button_reveals_textarea(self, ax):
        app_ready(ax)
        go_home(ax)
        assert rb_enter_new_snippet(ax), "File ▸ New Snippet did not fire"
        hb = snippet_header_buttons(ax)
        assert len(hb) >= 3, f"expected >=3 snippet-header tool buttons, found {len(hb)}"
        before = kit.rb_showing(ax)
        assert ax.action(hb[2].id, "AXPress"), "AXPress on the add-description button failed"
        time.sleep(1.4)
        after = kit.rb_showing(ax)
        assert kit.rb_reach(before, after, target="Add description"), (
            "the add-description button did not reveal the description area")
        assert len(text_areas(ax)) >= 2, (
            "description area did not add a second text_area next to the code editor")

    @pytest.mark.rb(depth=2, jump_kind="reach",
                    expect="Fragment 1 / Fragment 2 tab bar appears")
    def test_new_fragment_button_creates_fragment_tabs(self, ax):
        app_ready(ax)
        go_home(ax)
        assert rb_enter_new_snippet(ax), "File ▸ New Snippet did not fire"
        hb = snippet_header_buttons(ax)
        assert len(hb) >= 4, f"expected >=4 snippet-header tool buttons, found {len(hb)}"
        before = kit.rb_showing(ax)
        assert ax.action(hb[3].id, "AXPress"), "AXPress on the new-fragment button failed"
        time.sleep(1.5)
        after = kit.rb_showing(ax)
        assert kit.rb_reach(before, after, target="Fragment 2"), (
            "the new-fragment button did not add a second fragment tab")
        ls = labels(ax)
        assert "Fragment 1" in ls, f"no 'Fragment 1' tab beside 'Fragment 2': {ls[:40]}"


class TestSurfaceCloseButton:
    """The single webarea button on a full-window surface must return to the home shell."""

    @pytest.mark.rb(depth=2, jump_kind="reach", expect="home shell restored")
    def test_preferences_close_button_returns_home(self, ax):
        app_ready(ax)
        go_home(ax)
        assert rb_enter_preferences(ax), "could not open the Preferences/Settings surface"
        before = kit.rb_showing(ax)
        assert any("Preferences" in (l or "") for l in labels(ax)), (
            "Preferences surface did not render")
        assert rb_enter_close_surface(ax), "no close button inside the Preferences webarea"
        after = kit.rb_showing(ax)
        assert kit.rb_reach(before, after, target="All Snippets", source="Preferences"), (
            "the Preferences close button did not bring back the home shell")


# ══════════════════════════════════ VALUE ══════════════════════════════════

class TestDevtoolsCaseConverterButtons:
    """Developer Tools ▸ Case Converter — each named button must produce its exact string."""

    @pytest.mark.rb(depth=1, jump_kind="value", expect="helloWorldExample")
    def test_case_converter_camel_button(self, ax):
        app_ready(ax)
        assert rb_enter_devtool(ax, "Case Converter"), "could not open Case Converter"
        tas = text_areas(ax)
        assert len(tas) >= 2, f"Case Converter needs 2 text areas, found {len(tas)}"
        assert ax.set_value(tas[0].id, "hello world example"), "could not fill Input String"
        time.sleep(0.8)
        btn = named_button(ax, "camelCase")
        assert btn is not None, f"no 'camelCase' button; saw {button_names(ax)}"
        assert "AXPress" in (btn.actions or []), "camelCase button exposes no AXPress action"
        assert ax.action(btn.id, "AXPress"), "AXPress on camelCase failed"
        time.sleep(0.8)
        out = out_value(ax, 1)
        screenshot_assert(
            "buttons_case_converter",
            "massCode Developer Tools page, Case Converter pane: left rail lists Text Tools "
            "(Case Converter, Slug Generator, Sort Lines, URL Parser), Cryptography / "
            "Security and Encoders / Decoders. The pane shows an 'Input String' box holding "
            "'hello world example', a row of case buttons (lower case, UPPER CASE, camelCase, "
            "PascalCase, snake_case, kebab-case, Start Case) plus Clear/Copy, and an 'Output "
            "String' box now reading 'helloWorldExample' after camelCase was pressed.",
        )
        assert kit.rb_value(out, "helloWorldExample"), f"camelCase produced {out!r}"

    @pytest.mark.rb(depth=1, jump_kind="value", expect="kebab/snake/Pascal conversions")
    def test_case_converter_kebab_snake_pascal_buttons(self, ax):
        app_ready(ax)
        assert rb_enter_devtool(ax, "Case Converter"), "could not open Case Converter"
        expected = [("kebab-case", "hello-world-example"),
                    ("snake_case", "hello_world_example"),
                    ("PascalCase", "HelloWorldExample")]
        for label, want in expected:
            set_case_input(ax, "hello world example")
            btn = named_button(ax, label)
            assert btn is not None, f"no {label!r} button; saw {button_names(ax)}"
            assert ax.action(btn.id, "AXPress"), f"AXPress on {label} failed"
            time.sleep(0.7)
            got = out_value(ax, 1)
            assert kit.rb_value(got, want), f"{label} produced {got!r}, expected {want!r}"


class TestDevtoolsSortAndGenerateButtons:
    """Developer Tools buttons whose consequence is a computed value."""

    @pytest.mark.rb(depth=1, jump_kind="value", expect="sorted then reversed lines")
    def test_sort_lines_buttons(self, ax):
        app_ready(ax)
        assert rb_enter_devtool(ax, "Sort Lines"), "could not open Sort Lines"
        tas = text_areas(ax)
        assert len(tas) >= 2, f"Sort Lines needs 2 text areas, found {len(tas)}"
        assert ax.set_value(tas[0].id, "banana\napple\ncherry"), "could not fill the input"
        time.sleep(0.8)
        assert press_named(ax, "Sort", settle=0.9), (
            f"no pressable 'Sort' button; saw {button_names(ax)}")
        sorted_out = out_value(ax, 1)
        assert kit.rb_value(sorted_out, "apple\nbanana\ncherry"), (
            f"Sort produced {sorted_out!r}")
        assert press_named(ax, "Revers", settle=0.9), (
            f"no pressable 'Revers' button; saw {button_names(ax)}")
        reversed_out = out_value(ax, 1)
        assert kit.rb_value(reversed_out, "cherry\napple\nbanana"), (
            f"Revers produced {reversed_out!r}")

    @pytest.mark.rb(depth=1, jump_kind="value", expect="24-character generated password")
    def test_password_generate_button_honours_length(self, ax):
        app_ready(ax)
        assert rb_enter_devtool(ax, "Password Generator"), (
            "could not open Password Generator")
        fields = ax.find(role="text_field", max_results=10, max_depth=26)
        assert len(fields) >= 2, (
            f"Password Generator needs a Length + Result field, found {len(fields)}")
        assert ax.set_value(fields[0].id, "24"), "could not set the Length field"
        time.sleep(0.6)
        assert press_named(ax, "Generate", settle=1.0), (
            f"no pressable 'Generate' button; saw {button_names(ax)}")
        fields = ax.find(role="text_field", max_results=10, max_depth=26)
        assert len(fields) >= 2, "Result field vanished after Generate"
        result = (fields[1].value or "")
        assert not re.search(r"\s", result), f"password contains whitespace: {result!r}"
        assert kit.rb_value(len(result), 24), (
            f"Generate honoured neither Length=24 nor produced a password: {result!r}")


# ═══════════════════════════════ TRANSITION ═══════════════════════════════

class TestButtonToggles:
    """Buttons whose consequence is a reversible state flip."""

    @pytest.mark.rb(depth=1, jump_kind="transition",
                    expect="Snippets Showcase preview pane appears/disappears")
    def test_code_preview_button_toggles_preview(self, ax):
        app_ready(ax)
        go_home(ax)
        assert rb_enter_new_snippet(ax), "File ▸ New Snippet did not fire"
        hb = snippet_header_buttons(ax)
        assert len(hb) >= 2, f"expected >=2 snippet-header tool buttons, found {len(hb)}"
        before = "Snippets Showcase" in labels(ax)
        assert ax.action(hb[1].id, "AXPress"), "AXPress on the code-preview button failed"
        time.sleep(1.5)
        after = "Snippets Showcase" in labels(ax)
        assert kit.rb_flip(before, after, expect="code-preview pane toggles"), (
            f"code-preview button did not toggle the preview pane (stayed {before})")
        hb2 = snippet_header_buttons(ax)
        toggle_back = hb2[1] if len(hb2) >= 2 else hb[1]
        assert ax.action(toggle_back.id, "AXPress"), "second AXPress on code-preview failed"
        time.sleep(1.5)
        restored = "Snippets Showcase" in labels(ax)
        assert kit.rb_flip(after, restored, expect="code-preview pane toggles back"), (
            "code-preview button is not a toggle — the second press changed nothing")
        assert restored == before, (
            f"code-preview did not return to its original state ({before} -> {restored})")

    @pytest.mark.rb(depth=1, jump_kind="transition", expect="input and result cleared")
    def test_devtools_clear_button_empties_fields(self, ax):
        app_ready(ax)
        assert rb_enter_devtool(ax, "Base64 Encoder / Decoder"), (
            "could not open Base64 Encoder / Decoder")
        tas = text_areas(ax)
        assert len(tas) >= 2, f"Base64 tool needs 2 text areas, found {len(tas)}"
        assert ax.set_value(tas[0].id, "Hello massCode"), "could not fill the input"
        time.sleep(1.0)
        encoded = out_value(ax, 1)
        tas = text_areas(ax)
        before = ((tas[0].value or ""), (encoded or ""))
        assert before[0].strip(), "the input text area stayed empty after set_value"
        assert before[1].strip(), "the Base64 result never computed — nothing to clear"
        assert press_named(ax, "Clear", settle=0.8), (
            f"no pressable 'Clear' button; saw {button_names(ax)}")
        tas = text_areas(ax)
        assert len(tas) >= 2, "text areas vanished after Clear"
        after = ((tas[0].value or ""), (tas[1].value or ""))
        assert kit.rb_flip(before, after, expect="Clear empties input and result"), (
            f"Clear changed nothing: {before!r}")
        assert not after[0].strip(), f"input not cleared: {after[0]!r}"
        assert not after[1].strip(), f"result not cleared: {after[1]!r}"