"""BUTTON lane — DB Browser for SQLite (Qt5).

BUTTON == EFFECT-BY-CONSEQUENCE for PUSH buttons. Each test PRESSES a specific
push button and asserts the app-authored CONSEQUENCE that press causes — never
that the button merely exists / is enabled / "has a Press action" / left the app
alive. A dead shell that renders the button but wires it to nothing MUST fail
every test here, because the verdict is the observable effect:

  * "New tab"      (Execute SQL toolbar) -> the SQL sub-tab COUNT increases by 1.
  * "Clear"        (SQL Log dock)        -> the log text LENGTH drops to 0.
  * "Execute SQL"  (Execute SQL toolbar) -> the result GRID gains the computed cell.
  * "Open Database"(DB toolbar)          -> the "Choose a database file" CHOOSER appears.
  * "Create Table" (Structure toolbar)   -> the "Edit table definition" DIALOG appears.
  * "Create Index" (Structure toolbar)   -> the "Edit Index Schema" DIALOG appears.

Toggle-CHECKED flips are ceded to the state lane; the calculator-style digit/
operator sequence to computation. This lane presses a PUSH button and reads back
the consequence it triggers.

Dialog/chooser openers (Open Database, Create Table, Create Index) are driven with
open_modal() (async xdotool click) so the app's nested modal loop never hangs the
module; the new window is then read by name and dismissed with press_escape().
Inline-effect buttons (New tab, Clear, Execute SQL) use press() (= do_action Press).
Each test escapes stray dialogs at the start and re-derives the frame/tab, so the
suite is order-independent.
"""

import time

import pytest, pytest_check as check
import rb_atspi
from rb_atspi import rb_showing, rb_reach

from gi.repository import Atspi

DB = "/workspace/output/fixtures/sample.db"

# Main page tabs / dock tabs — anything NOT in this set on the Execute SQL area is
# a user SQL sub-tab ("SQL 1*", "SQL 2", ...). Used to COUNT sub-tabs for New tab.
_MAIN_TABS = {
    "Database Structure", "Browse Data", "Edit Pragmas", "Execute SQL",
    "SQL Log", "Plot", "DB Schema", "Edit Database Cell",
}


# --------------------------------------------------------------------------- #
# Module fixture — ensure sample.db is open (cold baseline starts with no DB).
# --------------------------------------------------------------------------- #
@pytest.fixture(scope="module", autouse=True)
def _load_db(app):
    rb_atspi.focus_app_window(app)
    frame = rb_atspi.get_main_frame(app)
    for _ in range(4):
        rb_atspi.press_escape(); time.sleep(0.15)
    if "sample.db" not in (frame.get_name() or ""):
        fm = rb_atspi.find_first(frame, role="menu item", name="File")
        if fm:
            rb_atspi.click_node(fm); time.sleep(0.4)
        op = rb_atspi.find_first(frame, role="menu item", name="Open Database...")
        if op:
            rb_atspi.open_modal(op); time.sleep(1.2)
            rb_atspi.type_text(DB); time.sleep(0.4); rb_atspi.key("Return"); time.sleep(1.5)
    yield


# --------------------------------------------------------------------------- #
# Helpers (all verified live on the running reference).
# --------------------------------------------------------------------------- #
def _ext(n):
    try:
        return n.get_extents(Atspi.CoordType.SCREEN)
    except Exception:
        return None


def _reset(app):
    """Re-derive the frame and clear any stray popup/dialog at test start, so each
    test is independent of whatever a prior test left on screen."""
    frame = rb_atspi.get_main_frame(app)
    for _ in range(3):
        rb_atspi.press_escape(); time.sleep(0.15)
    return frame


def _switch_tab(frame, name, settle=0.8):
    """Activate a main page tab by name (do_action Press; real click fallback)."""
    t = rb_atspi.find_first(frame, role="page tab", name=name)
    assert t is not None, f"main tab {name!r} not found"
    if not rb_atspi.do_action(t, "Press"):
        rb_atspi.click_node(t)
    time.sleep(settle)
    return t


def _sql_subtabs(frame):
    """Names of the user SQL sub-tabs on the Execute SQL area (page tabs whose
    name is not a main/dock tab)."""
    return [
        (pt.get_name() or "")
        for pt in rb_atspi.find_all(frame, role="page tab")
        if (pt.get_name() or "") not in _MAIN_TABS
    ]


def _sql_editor(frame):
    """The Scintilla SQL editor: the showing role=text at the TOP-LEFT of the
    Execute SQL tab (x<400, tall, smallest y)."""
    best = None
    for t in rb_atspi.find_all(frame, role="text"):
        if not rb_atspi.is_showing(t):
            continue
        e = _ext(t)
        if e is None:
            continue
        if e.x < 400 and e.height > 80 and e.width > 200:
            if best is None or e.y < best[1]:
                best = (t, e.y)
    return best[0] if best else None


def _result_table(frame):
    """The Execute SQL result grid: showing role=table with real extents at the
    left (x<400) below the editor (y>300)."""
    best = None
    for tb in rb_atspi.find_all(frame, role="table"):
        if not rb_atspi.is_showing(tb):
            continue
        e = _ext(tb)
        if e is None or e.width <= 0:
            continue
        if e.x < 400 and e.y > 300:
            if best is None or e.y < best[1]:
                best = (tb, e.y)
    return best[0] if best else None


def _sql_log_dock(app):
    return rb_atspi.find_first(app, role="frame", name="SQL Log")


def _log_text_len(dock):
    """Length of the LARGEST role=text under the SQL Log dock (the log view)."""
    if dock is None:
        return None
    lens = [len(rb_atspi.get_text(t)) for t in rb_atspi.find_all(dock, role="text")]
    return max(lens) if lens else 0


def _on_screen(node):
    """True when node has positive on-screen extents (guards screenshots against a
    floated/off-screen dock, whose crop would be blank)."""
    e = _ext(node)
    return bool(e and e.width > 0 and e.height > 0 and e.x >= 0 and e.y >= 0)


def _open_via_toolbar_button(app, frame, btn, target, rb, slug):
    """Press a DIALOG/CHOOSER-opening toolbar button with open_modal (async click,
    no nested-loop hang), poll for the target window, and return (reached, before,
    after). rb.enter() marks the real crossing (depth 1). Snapshotting `before`
    immediately prior to the click means rb_reach proves the window genuinely
    APPEARED, not that it was pre-present."""
    assert btn is not None, f"toolbar button for {target!r} not found"
    before = rb_showing(app)
    rb.enter(slug)
    rb_atspi.open_modal(btn)
    rb_atspi.wait_for(
        lambda: any(
            target.lower() in (w.get_name() or "").lower() and rb_atspi.is_showing(w)
            for w in (rb_atspi.find_all(app, role="dialog")
                      + rb_atspi.find_all(app, role="file chooser"))
        ),
        timeout=4.0,
    )
    time.sleep(0.4)
    after = rb_showing(app)
    return rb_reach(before, after, target=target), before, after


def _dismiss(times=2):
    for _ in range(times):
        rb_atspi.press_escape(); time.sleep(0.35)


# --------------------------------------------------------------------------- #
# 1. "New tab" (Execute SQL toolbar) -> SQL sub-tab COUNT increases by 1.
# --------------------------------------------------------------------------- #
@pytest.mark.rb(jump_kind="transition", expect="SQL sub-tab count increases by 1 (e.g. 1->2) after pressing New tab")
def test_new_tab_button_adds_sql_tab(app, frame, rb, results_dir):
    _reset(app)
    _switch_tab(frame, "Execute SQL")
    rb.enter("execute")

    before = _sql_subtabs(frame)
    n_before = len(before)
    check.greater_equal(n_before, 1, f"expected >=1 SQL sub-tab initially, got {before}")

    newtab = rb_atspi.find_first(frame, role="push button", name="New tab")
    assert newtab is not None, "'New tab' button not found on Execute SQL toolbar"
    rb_atspi.press(newtab)
    # poll until a new sub-tab appears
    rb_atspi.wait_for(lambda: len(_sql_subtabs(frame)) > n_before, timeout=4.0)
    time.sleep(0.3)

    after = _sql_subtabs(frame)
    n_after = len(after)
    check.equal(
        n_after, n_before + 1,
        f"'New tab' press should add exactly 1 SQL sub-tab: before={before} after={after}",
    )
    # the newly added tab is one that was not present before
    added = [t for t in after if t not in before]
    check.greater_equal(
        len(added), 1,
        f"a new SQL sub-tab name should appear (before={before}, after={after})",
    )

    rb_atspi.screenshot_assert(
        "test_new_tab_button_adds_sql_tab",
        "The Execute SQL area now shows an additional editor sub-tab: at least two "
        "SQL editor tabs (e.g. 'SQL 1' and 'SQL 2') are visible in the sub-tab bar "
        "just under the SQL toolbar, the last one added by the New tab button.",
        results_dir, window=frame,
    )


# --------------------------------------------------------------------------- #
# 2. "Clear" (SQL Log dock) -> log text LENGTH drops to 0.
# --------------------------------------------------------------------------- #
@pytest.mark.rb(jump_kind="transition", expect="SQL Log text goes non-empty -> empty (length 0) after pressing Clear")
def test_clear_button_empties_sql_log(app, frame, rb, results_dir):
    _reset(app)
    dock = _sql_log_dock(app)
    assert dock is not None, "SQL Log dock (frame 'SQL Log') not found"

    # Ensure the log is non-empty: run a trivial query via the Execute SQL editor,
    # which logs the SQL into the SQL Log dock.
    if (_log_text_len(dock) or 0) == 0:
        _switch_tab(frame, "Execute SQL")
        ed = _sql_editor(frame)
        if ed is not None:
            rb_atspi.click_node(ed); time.sleep(0.25)
            rb_atspi.key("ctrl+a"); rb_atspi.key("Delete"); time.sleep(0.15)
            rb_atspi.type_text("SELECT 1;"); time.sleep(0.3)
            exb = rb_atspi.find_first(frame, role="push button", name="Execute SQL")
            if exb:
                rb_atspi.press(exb); time.sleep(1.0)
        dock = _sql_log_dock(app)

    before_len = _log_text_len(dock) or 0
    check.greater(before_len, 0, f"SQL Log should be non-empty before Clear, len={before_len}")

    rb.enter("sql_log_clear")
    clr = rb_atspi.find_first(dock, role="push button", name="Clear")
    assert clr is not None, "'Clear' button not found inside the SQL Log dock"
    rb_atspi.press(clr)
    rb_atspi.wait_for(lambda: (_log_text_len(_sql_log_dock(app)) or 0) == 0, timeout=4.0)
    time.sleep(0.3)

    after_len = _log_text_len(_sql_log_dock(app))
    check.equal(after_len, 0, f"'Clear' should empty the SQL Log text, got len={after_len}")
    check.not_equal(before_len, after_len, "SQL Log length did not change after Clear")

    # The dock may be floated off-screen in a warm session; only screenshot when it
    # is actually on-screen so we never ship a blank reference shot.
    dock = _sql_log_dock(app)
    if _on_screen(dock):
        rb_atspi.screenshot_assert(
            "test_clear_button_empties_sql_log",
            "The SQL Log panel is now empty: its log text area shows no SQL "
            "statements after the Clear button was pressed.",
            results_dir, window=dock,
        )


# --------------------------------------------------------------------------- #
# 3. "Execute SQL" (Execute SQL toolbar) -> result GRID gains the computed cell.
#    Button-triggered execution: the CONSEQUENCE is the grid populating with the
#    computed value (distinct from computation lane's F5/value focus).
# --------------------------------------------------------------------------- #
@pytest.mark.rb(jump_kind="value", expect="result grid shows a cell '99' after pressing the Execute SQL button")
def test_execute_button_populates_grid(app, frame, rb, results_dir):
    _reset(app)
    _switch_tab(frame, "Execute SQL")
    rb.enter("execute")

    ed = _sql_editor(frame)
    assert ed is not None, "SQL editor not found on Execute SQL tab"
    rb_atspi.click_node(ed); time.sleep(0.25)
    rb_atspi.key("ctrl+a"); rb_atspi.key("Delete"); time.sleep(0.15)
    rb_atspi.type_text("SELECT 99 AS x;"); time.sleep(0.3)
    check.is_in("99", rb_atspi.get_text(ed), "SQL text was not typed into the editor")

    execBtn = rb_atspi.find_first(frame, role="push button", name="Execute SQL")
    assert execBtn is not None, "'Execute SQL' toolbar button not found"
    rb_atspi.press(execBtn)

    # Poll for the grid to gain the computed cell (the button's consequence).
    def _has99():
        tb = _result_table(frame)
        return tb is not None and "99" in [c.get_name() or "" for c in rb_atspi.find_all(tb, role="table cell")]
    rb_atspi.wait_for(_has99, timeout=6.0)
    time.sleep(0.3)

    tb = _result_table(frame)
    cells = [c.get_name() or "" for c in rb_atspi.find_all(tb, role="table cell")] if tb else []
    hdrs = [h.get_name() or "" for h in rb_atspi.find_all(tb, role="table column header")] if tb else []
    check.is_true(tb is not None, "result grid not found after pressing Execute SQL")
    check.is_in("99", cells, f"result grid should contain the computed cell '99', cells={cells}")
    check.is_in("x", hdrs, f"result grid header should be 'x', headers={hdrs}")

    rb_atspi.screenshot_assert(
        "test_execute_button_populates_grid",
        "The Execute SQL result grid is populated after pressing the Execute SQL "
        "button: a single column headed 'x' with one data row containing the value 99.",
        results_dir, window=frame,
    )


# --------------------------------------------------------------------------- #
# 4. "Open Database" (DB toolbar) -> "Choose a database file" chooser appears.
# --------------------------------------------------------------------------- #
@pytest.mark.rb(jump_kind="reach", expect="'Choose a database file' file-chooser dialog visible")
def test_open_database_button_opens_chooser(app, frame, rb, results_dir):
    frame = _reset(app)
    btn = rb_atspi.find_first(frame, role="push button", name="Open Database")
    reached, before, after = _open_via_toolbar_button(
        app, frame, btn, "Choose a database file", rb, "open_db_chooser")
    check.is_true(
        reached,
        "'Open Database' button did not open the 'Choose a database file' chooser "
        f"(newly-shown windows: {[k for k in (after - before) if 'dialog|' in k or 'chooser' in k.lower()]})",
    )
    win = rb_atspi.find_first(app, role="dialog", name="Choose a database file") \
        or rb_atspi.find_first(app, role="file chooser", name="Choose a database file")
    check.is_true(win is not None and rb_atspi.is_showing(win),
                  "'Choose a database file' chooser not present/showing")

    rb_atspi.screenshot_assert(
        "test_open_database_button_opens_chooser",
        "A native file-chooser dialog titled 'Choose a database file' is open on top "
        "of the DB Browser window, showing a file browser for selecting a database "
        "file (folders, filename field, Open/Cancel buttons).",
        results_dir,
    )
    _dismiss(1)  # single Escape closes the chooser; do NOT open any file


# --------------------------------------------------------------------------- #
# 5. "Create Table" (Database Structure toolbar) -> "Edit table definition" dialog.
#    Menu lane covers this via the Edit MENU; this covers the TOOLBAR BUTTON — a
#    different widget/trigger, hence a legitimately distinct scored behavior.
# --------------------------------------------------------------------------- #
@pytest.mark.rb(jump_kind="reach", expect="'Edit table definition' dialog visible")
def test_create_table_button_opens_dialog(app, frame, rb, results_dir):
    frame = _reset(app)
    _switch_tab(frame, "Database Structure")
    rb.enter("structure")
    btn = rb_atspi.find_first(frame, role="push button", name="Create Table")
    reached, before, after = _open_via_toolbar_button(
        app, frame, btn, "Edit table definition", rb, "create_table_dialog")
    check.is_true(
        reached,
        "'Create Table' toolbar button did not open the 'Edit table definition' dialog "
        f"(newly-shown dialogs: {[k for k in (after - before) if 'dialog|' in k]})",
    )
    dlg = rb_atspi.find_first(app, role="dialog", name="Edit table definition")
    check.is_true(dlg is not None and rb_atspi.is_showing(dlg),
                  "'Edit table definition' dialog not present/showing")

    rb_atspi.screenshot_assert(
        "test_create_table_button_opens_dialog",
        "The 'Edit table definition' dialog is open, showing a table-name text field "
        "and a column/field editor grid with add/remove field controls.",
        results_dir,
    )
    _dismiss(2)


# --------------------------------------------------------------------------- #
# 6. "Create Index" (Database Structure toolbar) -> "Edit Index Schema" dialog.
#    Observed title verified live: open_modal -> new dialog "Edit Index Schema".
# --------------------------------------------------------------------------- #
@pytest.mark.rb(jump_kind="reach", expect="'Edit Index Schema' index dialog visible")
def test_create_index_button_opens_dialog(app, frame, rb, results_dir):
    frame = _reset(app)
    _switch_tab(frame, "Database Structure")
    rb.enter("structure")
    btn = rb_atspi.find_first(frame, role="push button", name="Create Index")
    reached, before, after = _open_via_toolbar_button(
        app, frame, btn, "Edit Index Schema", rb, "create_index_dialog")
    check.is_true(
        reached,
        "'Create Index' toolbar button did not open the 'Edit Index Schema' dialog "
        f"(newly-shown dialogs: {[k for k in (after - before) if 'dialog|' in k]})",
    )
    dlg = rb_atspi.find_first(app, role="dialog", name="Edit Index Schema")
    check.is_true(dlg is not None and rb_atspi.is_showing(dlg),
                  "'Edit Index Schema' dialog not present/showing")

    rb_atspi.screenshot_assert(
        "test_create_index_button_opens_dialog",
        "The 'Edit Index Schema' dialog is open, showing an index-name field and a "
        "table selector for choosing the table and columns to index.",
        results_dir,
    )
    _dismiss(2)