from __future__ import annotations

import html
import re
from datetime import datetime, timedelta, timezone

import pytest

from somafm_tui import config
from somafm_tui.api import Song
from somafm_tui.app import SomaFMApp
from somafm_tui.widgets.help import HelpScreen
from somafm_tui.widgets.stage import StagePanel
from somafm_tui.widgets.station_list import StationList


def rendered_text(app: SomaFMApp) -> str:
    svg = html.unescape(app.export_screenshot()).replace("\xa0", " ")
    return re.sub(r"<[^>]+>", " ", svg)


@pytest.mark.asyncio
async def test_boot_navigation_filter_favourite_visualizer_help() -> None:
    app = SomaFMApp(autoplay=False, offline=True, audio=False)
    async with app.run_test(size=(110, 36)) as pilot:
        await pilot.pause()

        assert len(app.stations) >= 40
        assert app.current is not None
        assert app.current.id == "groovesalad"
        assert app.focused is None
        assert len(app.view) == len(app.stations)

        start = app.index
        await pilot.press("down")
        await pilot.pause()
        assert app.index == min(start + 1, len(app.view) - 1)

        await pilot.press("g")
        await pilot.pause()
        assert app.index == 0

        await pilot.press("shift+g")
        await pilot.pause()
        assert app.index == len(app.view) - 1

        await pilot.press("slash")
        await pilot.pause()
        search = app.query_one("#search")
        assert search.has_class("visible")
        assert app.focused is search

        for char in "defcon":
            await pilot.press(char)
        await pilot.pause()
        assert app.query == "defcon"
        assert [station.id for station in app.view] == ["defcon"]

        await pilot.press("enter")
        await pilot.pause()
        assert app.current is not None
        assert app.current.id == "defcon"
        assert app.query == ""
        assert len(app.view) == len(app.stations)
        assert app.playing_state in ("stopped", "error")

        app.action_favorite()
        await pilot.pause()
        assert "defcon" in app.config.favorites
        assert app.view[0].id == "defcon"
        assert app.index == 0

        modes = set()
        for _ in range(len(config.VISUALIZERS)):
            await pilot.press("v")
            await pilot.pause()
            modes.add(app.visualizer)
        assert modes == set(config.VISUALIZERS)

        await pilot.press("question_mark")
        await pilot.pause()
        assert isinstance(app.screen, HelpScreen)
        await pilot.press("x")
        await pilot.pause()
        assert not isinstance(app.screen, HelpScreen)

        text = rendered_text(app)
        for needle in ("SOMA FM RADIO", "STATIONS", "ON AIR", "SPECTRUM"):
            assert needle in text
        assert "DEF CON" in text.upper()


@pytest.mark.asyncio
async def test_stage_renders_history_and_listener_count() -> None:
    app = SomaFMApp(autoplay=False, offline=True, audio=False)
    async with app.run_test(size=(110, 40)) as pilot:
        await pilot.pause()
        station = app.current
        assert station is not None
        station.listeners = 1234
        now = datetime.now(timezone.utc)
        station.now_playing = Song(
            title="Rauschebart",
            artist="Jens Buchert",
            album="Gravity",
            played_at=now - timedelta(seconds=26),
        )
        station.history = [
            station.now_playing,
            Song(
                title="Room 505",
                artist="Alex Cortiz",
                album="The Chill Out Room",
                played_at=now - timedelta(minutes=5),
            ),
        ]
        app.query_one(StagePanel).refresh_stage()
        app.query_one(StationList).refresh()
        await pilot.pause()

        text = rendered_text(app)
        for needle in ("LAST PLAYED", "Jens Buchert", "Gravity", "1.2k listeners"):
            assert needle in text


@pytest.mark.asyncio
async def test_narrow_layout() -> None:
    app = SomaFMApp(autoplay=False, offline=True, audio=False)
    async with app.run_test(size=(64, 20)) as pilot:
        await pilot.pause()
        app.query_one(StagePanel).refresh_stage()
        app.query_one(StationList).refresh()
        await pilot.pause()
        text = rendered_text(app)
        assert "STATIONS" in text
        assert "ON AIR" in text


@pytest.mark.asyncio
async def test_stage_shows_bandcamp_link_only_when_present() -> None:
    app = SomaFMApp(autoplay=False, offline=True, audio=False)
    async with app.run_test(size=(110, 40)) as pilot:
        await pilot.pause()
        station = app.current
        assert station is not None
        song = Song(
            title="Rauschebart",
            artist="Jens Buchert",
            album="Gravity",
            bandcamp_url="https://jensbuchert.bandcamp.com/track/rauschebart",
        )
        station.now_playing = song
        app.query_one(StagePanel).refresh_stage()
        await pilot.pause()
        assert "Bandcamp" in rendered_text(app)

        song.bandcamp_url = ""
        app.query_one(StagePanel).refresh_stage()
        await pilot.pause()
        assert "Bandcamp" not in rendered_text(app)


@pytest.mark.asyncio
async def test_bandcamp_link_survives_history_refresh(monkeypatch) -> None:
    app = SomaFMApp(autoplay=False, offline=True, audio=False)
    async with app.run_test(size=(110, 40)) as pilot:
        await pilot.pause()
        station = app.current
        assert station is not None
        url = "https://jensbuchert.bandcamp.com/track/rauschebart"
        old_song = Song(
            title="Rauschebart",
            artist="Jens Buchert",
            album="Gravity",
            bandcamp_url=url,
        )
        station.now_playing = old_song
        station.history = [old_song]

        async def fake_fetch_history(client, station_id):
            assert station_id == station.id
            return [
                Song(
                    title="Rauschebart",
                    artist="Jens Buchert",
                    album="Gravity",
                )
            ]

        monkeypatch.setattr("somafm_tui.app.api.fetch_history", fake_fetch_history)
        worker = app._fetch_history(station.id)
        await worker.wait()
        await pilot.pause()

        assert station.now_playing is not None
        assert station.now_playing is not old_song
        assert station.now_playing.bandcamp_url == url
        assert "Bandcamp" in rendered_text(app)


@pytest.mark.asyncio
async def test_cached_bandcamp_link_is_reapplied_to_new_song() -> None:
    app = SomaFMApp(autoplay=False, offline=True, audio=False)
    async with app.run_test(size=(110, 40)) as pilot:
        await pilot.pause()
        station = app.current
        assert station is not None
        url = "https://jensbuchert.bandcamp.com/track/rauschebart"
        song = Song(title="Rauschebart", artist="Jens Buchert", album="Gravity")
        app._bandcamp_urls[f"{station.id}|{song.key()}"] = url
        station.now_playing = song

        app._update_bandcamp()
        await pilot.pause()

        assert song.bandcamp_url == url
        assert "Bandcamp" in rendered_text(app)


@pytest.mark.asyncio
async def test_media_session_commands_drive_the_app() -> None:
    app = SomaFMApp(autoplay=False, offline=True, audio=False)
    async with app.run_test(size=(100, 30)) as pilot:
        await pilot.pause()
        # The status bar names whichever backend this platform uses.
        assert app.media.label in {"mpris", "nowplaying"}
        assert app.media.status_label == "off"  # audio disabled

        # The ticker drains the queue, so give it a couple of ticks.
        before = app.current.id
        app.media_actions.put("next")
        await pilot.pause(0.2)
        assert app.current.id != before

        app.media_actions.put("volume:25")
        await pilot.pause(0.2)
        assert app.volume == 25