"""saunterbrowse: reading and listening to what a scan collected.

The browser never writes to the recordings directory, so every test here is
about what it *shows* and what it does with a keypress.  Playback is checked
against a recorded command rather than a real one: whether audio came out of
the speakers is not something a test can see, but which file was handed to
which player is.
"""
import json
import re
import time
import wave
from datetime import datetime
from pathlib import Path

import numpy as np
import pytest
from rich.console import Console

from bandsaunter.browse import (Browser, Player, PLAYERS, Keyboard, main,
                                scan_directory)
from bandsaunter.callsign import CallsignBook


# -- fixtures ----------------------------------------------------------------

def write_wav(path: Path, seconds: float = 1.0, rate: int = 16_000) -> None:
    n = int(seconds * rate)
    tone = (np.sin(2 * np.pi * 440 * np.arange(n) / rate) * 8000)
    with wave.open(str(path), "wb") as w:
        w.setnchannels(1)
        w.setsampwidth(2)
        w.setframerate(rate)
        w.writeframes(tone.astype(np.int16).tobytes())


def make_capture(directory: Path, mhz: float, when: str, mode: str,
                 seconds: float = 1.0, transcript: str = "",
                 meta: dict | None = None) -> Path:
    """One recording and its sidecars, named the way a scan names them."""
    stem = f"{mhz:011.6f}MHz--{when}-{mode}"
    wav = directory / f"{stem}.wav"
    write_wav(wav, seconds)
    if meta is not None:
        body = {"frequency_hz": mhz * 1e6, "hit": meta}
        (directory / f"{stem}.json").write_text(json.dumps(body))
    if transcript:
        (directory / f"{stem}_transcription.txt").write_text(transcript + "\n")
    return wav


@pytest.fixture
def library(tmp_path):
    """A small recordings directory covering the cases that render differently."""
    # The transcript names a callsign, as a real one from a net would.
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm", 4.0,
                 transcript="Net control, this is W1AW, standing by.",
                 meta={"category": "voice", "snr_db": 21.5,
                       "classification": "Narrowband FM voice",
                       "confidence": 0.88, "ctcss_hz": 100.0,
                       "band_labels": ["2 m Amateur"]})
    make_capture(tmp_path, 856.5625, "2026-08-22_11_00_00", "fsk", 2.0,
                 meta={"category": "trunk", "snr_db": 38.0, "baud": 3600.0,
                       "classification": "Motorola SMARTNET / SmartZone "
                                         "(Type I/II) trunking control channel",
                       "confidence": 0.95})
    make_capture(tmp_path, 144.1, "2026-08-22_09_00_00", "cw", 3.0,
                 meta={"category": "cw", "morse_text": "VVV DE W1AW",
                       "morse_wpm": 18.0, "classification": "CW / Morse"})
    return tmp_path


@pytest.fixture(autouse=True)
def no_network(monkeypatch):
    """No test in this file may contact the licence database.

    One did, silently, and passed -- it was only visible because the assertion
    it failed printed a real operator's address.  A stub that is forgotten
    should fail loudly rather than work.
    """
    def refuse(self, call):
        raise AssertionError(f"a test tried to look up {call} for real")

    monkeypatch.setattr(CallsignBook, "_request", refuse)


def browser(directory, width=100, height=30, player=None) -> Browser:
    console = Console(width=width, height=height, force_terminal=True)
    return Browser(directory, console=console,
                   player=player if player is not None else Player([]))


def frame(b: Browser) -> str:
    with b.console.capture() as cap:
        b.console.print(b.render())
    return cap.get()


class FakePlayer(Player):
    """Records what it was asked to play instead of playing it."""

    def __init__(self):
        super().__init__(["/bin/true"])
        self.played: list[Path] = []
        self.stops = 0
        self._active = False

    def play(self, cap):
        self.played.append(cap.path)
        self.playing = cap
        self._active = True
        self.error = ""

    def stop(self):
        if self._active:
            self.stops += 1
        self._active = False
        self.playing = None

    @property
    def active(self):
        return self._active


# -- reading the directory ---------------------------------------------------

def test_every_recording_is_found(library):
    assert len(scan_directory(library)) == 3


def test_the_newest_recording_comes_first(library):
    caps = scan_directory(library)
    assert [c.mode for c in caps] == ["fsk", "nfm", "cw"]


def test_the_filename_alone_gives_frequency_time_and_mode(library):
    cap = [c for c in scan_directory(library) if c.mode == "nfm"][0]
    assert cap.frequency == pytest.approx(146_520_000.0)
    assert cap.when == datetime(2026, 8, 22, 10, 0, 0)


def test_length_comes_from_the_wav_not_the_sidecar(tmp_path):
    """A combined file grows after its sidecar was written, and a sidecar can
    be missing entirely."""
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm", 2.5,
                 meta={"duration": 999.0})
    cap = scan_directory(tmp_path)[0]
    assert cap.duration == pytest.approx(2.5, abs=0.05)


def test_a_recording_with_no_sidecar_is_still_listed(tmp_path):
    write_wav(tmp_path / "0146.520000MHz--2026-08-22_10_00_00-nfm.wav")
    cap = scan_directory(tmp_path)[0]
    assert cap.category == "unknown"
    assert cap.classification == "unclassified"


def test_a_file_the_browser_cannot_name_is_shown_rather_than_hidden(tmp_path):
    write_wav(tmp_path / "something-else.wav")
    caps = scan_directory(tmp_path)
    assert len(caps) == 1 and caps[0].frequency == 0.0


def test_a_combined_per_frequency_file_is_recognised(tmp_path):
    write_wav(tmp_path / "0146.880000MHz.wav")
    cap = scan_directory(tmp_path)[0]
    assert cap.combined
    assert cap.frequency == pytest.approx(146_880_000.0)
    assert cap.category == "combined"


def test_sidecars_are_only_read_when_something_asks(library):
    """A directory of ten thousand recordings has to open instantly."""
    caps = scan_directory(library)
    assert all(c._meta is None for c in caps)
    _ = caps[0].category
    assert caps[0]._meta is not None


def test_a_missing_directory_is_not_an_exception(tmp_path):
    assert scan_directory(tmp_path / "nowhere") == []


# -- the transcript ----------------------------------------------------------

def test_the_transcript_is_at_the_top_of_the_screen(library):
    b = browser(library)
    b.index = [i for i, c in enumerate(b.view) if c.mode == "nfm"][0]
    out = frame(b)
    head = out.split("recordings in")[0]
    assert "Net control, this is W1AW" in head
    assert "transcript" in head


def test_the_txt_beside_the_recording_beats_the_sidecar(tmp_path):
    """The sidecar records what was recognised at the time; the file is what a
    later re-run wrote."""
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 transcript="the newer text",
                 meta={"transcript": "the older text", "category": "voice"})
    assert scan_directory(tmp_path)[0].transcript == "the newer text"


def test_the_sidecar_transcript_is_used_when_there_is_no_txt(tmp_path):
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 meta={"transcript": "only in the sidecar", "category": "voice"})
    assert scan_directory(tmp_path)[0].transcript == "only in the sidecar"


@pytest.mark.parametrize("meta,expected", [
    ({"category": "digital"}, "data, not speech"),
    ({"category": "trunk"}, "data, not speech"),
    ({"category": "carrier"}, "silence by definition"),
    ({"category": "cw"}, "Morse"),
    ({"category": "voice"}, "no transcript beside it"),
])
def test_an_empty_transcript_says_which_reason_applies(tmp_path, meta,
                                                       expected):
    """"No transcript" is the same shape for Morse, for data and for a
    recogniser that was never installed, and those want different things
    done about them."""
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm", meta=meta)
    b = browser(tmp_path)
    assert expected in frame(b)


def test_decoded_morse_is_shown_where_the_transcript_would_be(library):
    b = browser(library)
    b.index = [i for i, c in enumerate(b.view) if c.mode == "cw"][0]
    assert "VVV DE W1AW" in frame(b)


def test_a_transcript_too_long_for_the_panel_says_so(tmp_path):
    """Cutting the end off a transmission silently is how a reader ends up
    believing they have read all of it."""
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 transcript=" ".join(f"word{i}" for i in range(400)),
                 meta={"category": "voice"})
    out = frame(browser(tmp_path, height=24))
    assert "more line(s)" in out and "press t" in out


def test_the_reader_shows_what_the_panel_could_not(tmp_path):
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 transcript=" ".join(f"word{i}" for i in range(400)),
                 meta={"category": "voice"})
    b = browser(tmp_path, height=24)
    panel_text = frame(b)
    b.handle("t")
    assert b.reading
    reader = frame(b)
    assert "word0" in reader
    assert "word200" in reader and "word200" not in panel_text


def test_the_reader_scrolls_and_comes_back(tmp_path):
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 transcript=" ".join(f"word{i}" for i in range(400)),
                 meta={"category": "voice"})
    b = browser(tmp_path, height=20)
    b.handle("t")
    first = frame(b)
    b.handle("pgdn")
    assert frame(b) != first
    b.handle("home")
    assert frame(b) == first
    b.handle("escape")
    assert not b.reading


def test_the_reader_refuses_when_there_is_nothing_to_read(library):
    b = browser(library)
    b.index = [i for i, c in enumerate(b.view) if c.mode == "fsk"][0]
    b.handle("t")
    assert not b.reading
    assert "no transcript" in b.message


# -- the frame ---------------------------------------------------------------

@pytest.mark.parametrize("width,height",
                         [(60, 16), (80, 24), (100, 30), (200, 60)])
def test_the_frame_never_overflows_the_terminal(library, width, height):
    """A frame taller than the terminal cannot be redrawn in place: every
    refresh scrolls another copy of it into the scrollback."""
    b = browser(library, width=width, height=height)
    lines = frame(b).rstrip("\n").split("\n")
    assert len(lines) <= height, f"{len(lines)} lines in {height}"
    bare = [re.sub(r"\x1b\[[0-9;]*m", "", line) for line in lines]
    assert max(len(line) for line in bare) <= width, "a line ran off the side"


def test_one_row_per_recording_however_long_the_transcript(tmp_path):
    """A wrapped row would push the ones below it off the bottom, and the
    cursor arithmetic counts rows."""
    for i in range(6):
        make_capture(tmp_path, 146.0 + i, f"2026-08-22_10_0{i}_00", "nfm",
                     transcript=" ".join(f"word{n}" for n in range(200)),
                     meta={"category": "voice"})
    b = browser(tmp_path, height=30)
    body = frame(b).split("recordings in")[1]
    assert body.count("word0") == 6, "a row wrapped instead of truncating"


def test_the_header_names_the_frequency_mode_and_category(library):
    b = browser(library)
    b.index = [i for i, c in enumerate(b.view) if c.mode == "nfm"][0]
    head = frame(b).split("transcript")[0]
    assert "146.52 MHz" in head and "NFM" in head and "voice" in head


def test_a_symbol_rate_is_only_shown_where_it_means_something(library):
    """The estimator returns a figure for every capture, and "120 baud"
    beside a conversation is noise."""
    b = browser(library)
    b.index = [i for i, c in enumerate(b.view) if c.mode == "fsk"][0]
    assert "3600 baud" in frame(b)
    b.index = [i for i, c in enumerate(b.view) if c.mode == "nfm"][0]
    assert "baud" not in frame(b)


def test_an_empty_directory_renders_rather_than_crashing(tmp_path):
    b = browser(tmp_path)
    assert "nothing here yet" in frame(b)


# -- moving around -----------------------------------------------------------

def test_the_arrow_keys_move_the_cursor(library):
    b = browser(library)
    assert b.index == 0
    b.handle("down")
    assert b.index == 1
    b.handle("up")
    assert b.index == 0


def test_the_cursor_stops_at_both_ends(library):
    b = browser(library)
    for _ in range(20):
        b.handle("up")
    assert b.index == 0
    for _ in range(20):
        b.handle("down")
    assert b.index == len(b.view) - 1


def test_home_and_end_go_to_the_ends(library):
    b = browser(library)
    b.handle("end")
    assert b.index == len(b.view) - 1
    b.handle("home")
    assert b.index == 0


def test_the_cursor_stays_on_screen_in_a_long_list(tmp_path):
    for i in range(60):
        make_capture(tmp_path, 146.0, f"2026-08-22_10_{i // 60:02d}_{i % 60:02d}",
                     "nfm", meta={"category": "voice"})
    b = browser(tmp_path, height=24)
    b.handle("end")
    frame(b)
    assert b.top <= b.index < b.top + b._rows()


def test_sorting_cycles_and_reorders(library):
    b = browser(library)
    assert b.sort == "time"
    b.handle("s")
    assert b.sort == "frequency"
    assert [c.frequency for c in b.view] == sorted(c.frequency
                                                   for c in b.view)
    b.handle("s")
    assert b.sort == "duration"
    assert b.view[0].duration >= b.view[-1].duration


def test_quitting_stops_the_loop(library):
    assert browser(library).handle("q") is False


# -- searching ---------------------------------------------------------------

def test_search_matches_what_was_said(library):
    """The point of it: "did anyone mention the repeater" is a question about
    content, not about filenames."""
    b = browser(library)
    b.handle("/")
    for ch in "standing by":
        b.handle(ch)
    b.handle("enter")
    assert len(b.view) == 1 and b.view[0].mode == "nfm"


def test_search_matches_the_identification(library):
    b = browser(library)
    b.query = "smartnet"
    b.apply()
    assert len(b.view) == 1 and b.view[0].mode == "fsk"


def test_search_matches_the_frequency_in_the_name(library):
    b = browser(library)
    b.query = "0856"
    b.apply()
    assert len(b.view) == 1


def test_backspace_edits_the_search(library):
    b = browser(library)
    b.handle("/")
    for ch in "smartnetX":
        b.handle(ch)
    assert b.view == []
    b.handle("backspace")
    assert len(b.view) == 1


def test_escape_clears_the_search_before_it_quits(library):
    """Escape with a filter in force means "show me everything again", not
    "throw the program away"."""
    b = browser(library)
    b.query = "smartnet"
    b.apply()
    assert b.handle("escape") is True
    assert b.query == "" and len(b.view) == 3
    assert b.handle("escape") is False


def test_a_search_that_matches_nothing_says_so(library):
    b = browser(library)
    b.query = "no such thing"
    b.apply()
    assert "nothing matches" in frame(b)


def test_keys_typed_while_searching_are_not_commands(library):
    """'q' has to be a letter in the search box, not an instruction to quit."""
    b = browser(library)
    b.handle("/")
    assert b.handle("q") is True
    assert b.query == "q"


# -- playing -----------------------------------------------------------------

def test_enter_plays_the_highlighted_recording(library):
    p = FakePlayer()
    b = browser(library, player=p)
    b.handle("down")
    b.handle("enter")
    assert p.played == [b.current.path]


def test_space_stops_what_is_playing(library):
    p = FakePlayer()
    b = browser(library, player=p)
    b.handle("enter")
    b.handle("space")
    assert p.stops == 1 and not p.active


def test_playing_a_second_recording_stops_the_first(tmp_path):
    """Two players talking over each other is worse than either alone."""
    calls = []

    class Recorder(Player):
        def play(self, cap):
            calls.append(("play", cap.path.name))
            self.playing = cap

        def stop(self):
            calls.append(("stop", None))

    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm")
    make_capture(tmp_path, 147.52, "2026-08-22_10_01_00", "nfm")
    b = browser(tmp_path, player=Recorder([]))
    b.handle("enter")
    b.handle("down")
    b.handle("enter")
    assert [c[0] for c in calls] == ["play", "play"]


def test_the_real_player_stops_the_previous_file_first(library, tmp_path):
    """The stop is in Player.play, so every caller gets it."""
    p = Player(["/bin/sleep", "5"])
    caps = scan_directory(library)
    p.play(caps[0])
    first = p.proc
    assert first is not None
    p.play(caps[1])
    assert first.poll() is not None, "the first player was left running"
    p.stop()


def test_stopping_kills_the_player_and_anything_it_started(library, tmp_path):
    """Several of these players are wrapper scripts that fork the real one.
    Signalling only the script leaves the sound playing with nothing on
    screen to stop it."""
    import subprocess as sp
    marker = tmp_path / "child.pid"
    script = tmp_path / "wrapper.sh"
    script.write_text("#!/bin/sh\nsleep 30 &\necho $! > %s\nwait\n" % marker)
    script.chmod(0o755)

    p = Player([str(script)])
    p.play(scan_directory(library)[0])
    for _ in range(50):
        if marker.exists():
            break
        time.sleep(0.05)
    child = int(marker.read_text().strip())
    assert sp.run(["kill", "-0", str(child)]).returncode == 0, "never started"
    p.stop()
    for _ in range(50):
        if sp.run(["kill", "-0", str(child)],
                  capture_output=True).returncode != 0:
            break
        time.sleep(0.05)
    assert sp.run(["kill", "-0", str(child)],
                  capture_output=True).returncode != 0, "still playing"


def test_no_player_installed_is_reported_not_crashed(library):
    b = browser(library, player=Player([]))    # [] means "none installed"
    b.handle("enter")
    assert "no audio player" in b.message
    assert all(name in b.message for name, _ in PLAYERS)


def test_the_file_is_the_last_argument_to_the_player(library):
    p = Player(["/bin/true", "--flag"])
    cap = scan_directory(library)[0]
    p.play(cap)
    assert p.command == ["/bin/true", "--flag"]
    assert p.playing is cap
    p.stop()


def test_playback_progress_is_shown(library):
    p = FakePlayer()
    b = browser(library, player=p)
    b.handle("enter")
    p.started_at = 0.0                # started long ago: the bar is full
    assert "♪" in frame(b)


# -- the keyboard ------------------------------------------------------------

# Driven through a real pty, not a stand-in object.  A fake stream with a
# read() method passed every one of these while the program hung on the first
# keypress: sys.stdin.read(1) goes through a buffered text wrapper, which in
# cbreak mode waits for more bytes than a single key provides.


@pytest.fixture
def terminal():
    """A pty whose slave end is what Keyboard will read."""
    import os
    import pty
    master, slave = pty.openpty()
    stream = os.fdopen(slave, "r")
    yield master, stream
    for fd in (master,):
        try:
            os.close(fd)
        except OSError:
            pass
    try:
        stream.close()
    except OSError:
        pass


@pytest.mark.parametrize("raw,name", [
    ("\x1b[A", "up"), ("\x1b[B", "down"), ("\x1b[C", "right"),
    ("\x1b[D", "left"), ("\x1b[5~", "pgup"), ("\x1b[6~", "pgdn"),
    ("\x1b[H", "home"), ("\x1b[F", "end"),
    ("\x1bOA", "up"), ("\x1bOB", "down"),
    ("\r", "enter"), ("\n", "enter"), (" ", "space"),
    ("\x7f", "backspace"), ("q", "q"), ("/", "/"), ("t", "t"),
])
def test_a_key_arrives_as_one_key(terminal, raw, name):
    """An arrow is "\\x1b[A" -- three bytes.  Read one at a time it becomes
    three commands, and the cursor jumps somewhere unasked."""
    import os
    master, stream = terminal
    with Keyboard(stream) as kb:
        assert kb.enabled
        os.write(master, raw.encode())
        assert kb.get(0.5) == name
        assert kb.get(0.05) == "", "one keypress produced more than one key"


def test_a_bare_escape_is_not_mistaken_for_an_arrow(terminal):
    import os
    master, stream = terminal
    with Keyboard(stream) as kb:
        os.write(master, b"\x1b")
        assert kb.get(0.5) == "escape"


def test_keys_arriving_together_are_delivered_one_at_a_time(terminal):
    """Held down, or pasted, several keys land in a single read."""
    import os
    master, stream = terminal
    with Keyboard(stream) as kb:
        os.write(master, b"\x1b[B\x1b[Bq")
        assert [kb.get(0.5) for _ in range(3)] == ["down", "down", "q"]


def test_nothing_pressed_returns_nothing(terminal):
    _, stream = terminal
    with Keyboard(stream) as kb:
        assert kb.get(0.05) == ""


def test_the_terminal_is_restored_afterwards(terminal):
    """Left in cbreak, the shell that follows has no line editing and no echo."""
    import termios
    _, stream = terminal
    before = termios.tcgetattr(stream.fileno())
    with Keyboard(stream) as kb:
        assert kb.enabled
        assert termios.tcgetattr(stream.fileno()) != before
    assert termios.tcgetattr(stream.fileno()) == before


def test_a_stream_that_is_not_a_terminal_is_not_an_error(tmp_path):
    path = tmp_path / "notatty"
    path.write_text("q")
    with open(path) as fh, Keyboard(fh) as kb:
        assert not kb.enabled
        assert kb.get(0.0) == ""


# -- the command line --------------------------------------------------------

def test_list_prints_one_line_per_recording(library, capsys):
    assert main(["--list", str(library)]) == 0
    lines = [ln for ln in capsys.readouterr().out.splitlines() if ln.strip()]
    assert len(lines) == 3
    assert any("Net control" in ln for ln in lines)


def test_list_honours_the_filter(library, capsys):
    assert main(["--list", "--filter", "smartnet", str(library)]) == 0
    lines = [ln for ln in capsys.readouterr().out.splitlines() if ln.strip()]
    assert len(lines) == 1


def test_a_missing_directory_is_explained(tmp_path, capsys):
    assert main([str(tmp_path / "nowhere")]) == 2
    assert "no such directory" in capsys.readouterr().out


def test_an_empty_directory_is_explained(tmp_path, capsys):
    assert main([str(tmp_path)]) == 1
    assert "no recordings" in capsys.readouterr().out


def test_it_refuses_to_draw_where_there_is_no_terminal(library, capsys):
    """Piped or redirected, the full-screen frame would be gibberish."""
    assert main([str(library)]) == 2
    out = capsys.readouterr().out
    assert "needs a terminal" in out and "--list" in out


def test_the_output_directory_is_found_without_being_told(monkeypatch,
                                                          tmp_path):
    monkeypatch.setenv("BANDSAUNTER_OUTPUT", str(tmp_path))
    from bandsaunter.browse import default_directory
    assert default_directory() == tmp_path


# -- detected callsigns ------------------------------------------------------

class StubBook(CallsignBook):
    """Answers lookups from a dict, so no test touches the network."""

    def __init__(self, answers=None, tmp=None, **kw):
        self.answers = answers or {}
        self.requested = []
        super().__init__(cache=(tmp or Path("/nonexistent")) / "c.json", **kw)

    def _request(self, call):
        self.requested.append(call)
        if call not in self.answers:
            raise OSError("offline")
        return self.answers[call]


KU0W = {
    "status": "VALID", "type": "PERSON", "name": "ROD R GOWDY",
    "current": {"callsign": "KU0W", "operClass": "EXTRA"},
    "previous": {"callsign": ""}, "trustee": {"callsign": ""},
    "address": {"line2": "TUCSON, AZ 85742"},
    "location": {"gridsquare": "DM42lj"},
    "otherInfo": {"expiryDate": "08/09/2034"},
}


@pytest.fixture
def net(tmp_path):
    """A directory whose transcript names a callsign, and a stubbed lookup."""
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm", 4.0,
                 transcript="Net control, this is KU 0W, standing by.",
                 meta={"category": "voice", "classification": "NFM voice"})
    return tmp_path


def net_browser(directory, tmp, answers=None, **kw):
    b = browser(directory, **kw)
    b.book = StubBook(answers if answers is not None else {"KU0W": KU0W},
                      tmp=tmp)
    return b


def test_callsigns_are_listed_under_the_transcript(net, tmp_path):
    b = net_browser(net, tmp_path)
    b.book.get("KU0W")
    b.book.wait(5)
    out = frame(b)
    head, _, rest = out.partition("recordings in")
    assert "DETECTED CALLSIGNS:" in head
    assert "KU0W" in head
    assert "Rod R Gowdy" in head and "Tucson, AZ" in head
    # Under the words, not above them.
    assert head.index("standing by") < head.index("DETECTED CALLSIGNS:")


def test_a_callsign_broken_by_the_recogniser_is_still_found(net, tmp_path):
    """The transcript says "KU 0W"; the licence is under KU0W."""
    cap = scan_directory(net)[0]
    assert cap.callsigns == ["KU0W"]


def test_the_lookup_is_shown_as_pending_before_it_lands(net, tmp_path):
    class Slow(StubBook):
        def _request(self, call):
            time.sleep(1.0)
            return super()._request(call)

    b = browser(net)
    b.book = Slow({"KU0W": KU0W}, tmp=tmp_path)
    assert "looking up" in frame(b)


def test_a_transcript_with_no_callsign_has_no_block(tmp_path):
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 transcript="the meeting is at seven on the fourth Saturday",
                 meta={"category": "voice"})
    assert "DETECTED CALLSIGNS" not in frame(browser(tmp_path))


def test_a_callsign_that_cannot_be_looked_up_still_appears(net, tmp_path):
    """Offline, the prefix still says which country and district it is."""
    b = net_browser(net, tmp_path, answers={})
    b.book.get("KU0W")
    b.book.wait(5)
    out = frame(b)
    assert "KU0W" in out and "United States" in out


def test_the_callsigns_survive_a_transcript_too_long_for_the_panel(tmp_path):
    """Whatever else is squeezed, the callsigns stay: they are the part of the
    panel that cannot be recovered by listening to the recording."""
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 transcript="KU0W " + " ".join(f"word{i}" for i in range(400)),
                 meta={"category": "voice"})
    b = net_browser(tmp_path, tmp_path, height=22)
    b.book.get("KU0W")
    b.book.wait(5)
    out = frame(b)
    assert "DETECTED CALLSIGNS:" in out and "Rod R Gowdy" in out
    assert "more line(s)" in out


def test_the_reader_shows_them_at_the_end_of_the_words(tmp_path):
    make_capture(tmp_path, 146.52, "2026-08-22_10_00_00", "nfm",
                 transcript="KU0W " + " ".join(f"word{i}" for i in range(400)),
                 meta={"category": "voice"})
    b = net_browser(tmp_path, tmp_path, height=22)
    b.book.get("KU0W")
    b.book.wait(5)
    b.handle("t")
    assert "DETECTED CALLSIGNS" not in frame(b), "shown beside the middle"
    b.handle("end")
    assert "DETECTED CALLSIGNS:" in frame(b)


def test_the_frame_still_fits_with_callsigns(net, tmp_path):
    for height in (16, 20, 24, 40):
        b = net_browser(net, tmp_path, height=height)
        b.book.get("KU0W")
        b.book.wait(5)
        lines = frame(b).rstrip("\n").split("\n")
        assert len(lines) <= height, f"{len(lines)} lines in {height}"


def test_callsigns_are_found_once_per_recording(net):
    cap = scan_directory(net)[0]
    assert cap._calls is None
    first = cap.callsigns
    assert cap._calls is not None
    assert cap.callsigns is first


# -- the callsign command line -----------------------------------------------

def test_callsigns_flag_reports_where_each_was_heard(net, capsys, monkeypatch):
    monkeypatch.setattr("bandsaunter.browse.CallsignBook",
                        lambda **kw: StubBook({"KU0W": KU0W}, tmp=net, **kw))
    assert main(["--callsigns", str(net)]) == 0
    out = capsys.readouterr().out
    assert "KU0W" in out and "Rod R Gowdy" in out
    assert "heard on" in out and "146.52 MHz" in out


def test_callsigns_flag_says_so_when_there_are_none(tmp_path, capsys):
    make_capture(tmp_path, 856.5625, "2026-08-22_11_00_00", "fsk", 2.0,
                 meta={"category": "trunk"})
    assert main(["--callsigns", str(tmp_path)]) == 1
    assert "no callsigns" in capsys.readouterr().out


def test_no_lookup_contacts_nothing(net, capsys, monkeypatch):
    """The flag has to mean it: nothing leaves the machine."""
    made = []

    class Watching(StubBook):
        def _request(self, call):
            made.append(call)
            return super()._request(call)

    monkeypatch.setattr("bandsaunter.browse.CallsignBook",
                        lambda **kw: Watching({"KU0W": KU0W}, tmp=net, **kw))
    assert main(["--callsigns", "--no-lookup", str(net)]) == 0
    out = capsys.readouterr().out
    assert made == [], "a request was made with --no-lookup"
    assert "KU0W" in out
    assert "United States" in out, "the prefix should still be described"