from hermes_cli.curses_ui import (
    _SearchState,
    _filter_indices,
    _handle_active_search_key,
    _move_filtered_cursor,
    _reconcile_cursor,
)


class _FakeCurses:
    KEY_BACKSPACE = 263
    KEY_DOWN = 258
    KEY_ENTER = 343


def test_filter_indices_keeps_all_items_for_blank_query():
    assert _filter_indices(["Anthropic", "OpenAI"], "") == [0, 1]
    assert _filter_indices(["Anthropic", "OpenAI"], "   ") == [0, 1]


def test_filter_indices_matches_subsequences():
    items = ["claude-opus-4-7", "gpt-5.4-codex", "deepseek-v4"]

    assert _filter_indices(items, "co47") == [0]
    assert _filter_indices(items, "gpt5") == [1]


def test_filter_indices_requires_all_tokens():
    items = ["OpenAI Codex", "OpenAI Chat Completions", "Anthropic Claude"]

    assert _filter_indices(items, "open cod") == [0]


def test_reconcile_cursor_moves_to_first_visible_match():
    assert _reconcile_cursor([2, 4], 0) == (2, 0)
    assert _reconcile_cursor([2, 4], 4) == (4, 1)


def test_move_filtered_cursor_wraps_within_matches():
    filtered = [2, 4, 7]

    assert _move_filtered_cursor(filtered, 2, 0, -1) == 7
    assert _move_filtered_cursor(filtered, 7, 2, 1) == 2


def test_active_search_allows_navigation_keys_to_reach_menu_loop():
    search = _SearchState(active=True, query="opus")

    assert _handle_active_search_key(_FakeCurses, _FakeCurses.KEY_DOWN, search) == (
        False,
        False,
        False,
    )
    assert search.active is True
    assert search.query == "opus"


def test_active_search_consumes_query_editing_and_confirm_keys():
    search = _SearchState(active=True, query="op")

    assert _handle_active_search_key(_FakeCurses, ord("u"), search) == (True, False, True)
    assert search.query == "opu"

    assert _handle_active_search_key(_FakeCurses, _FakeCurses.KEY_ENTER, search) == (
        True,
        True,
        False,
    )