"""Tests for the media player subsystem.

Covers the media server API (via nginx HTTPS and direct), the stream proxy
with HTTP Range passthrough, static file serving of the ./media volume, the
web player markup, and Hope's media MCP toolset. Download tests are gated
behind HOPE_RUN_YTDLP_DOWNLOAD=1 (network-heavy, occasionally flaky).
"""

import json
import os
import subprocess
import threading
import time
import uuid
from http.server import BaseHTTPRequestHandler, HTTPServer
from urllib.parse import urlparse

import httpx
import pytest

from conftest import (
    TOKEN_URL, docker_exec, docker_exec_python, IS_LOCAL_DEPLOYMENT, WEB_BASE_URL
)

MEDIA_API = "/media/api"
TEST_ROOM = f"media-test-{uuid.uuid4().hex[:8]}"


# ── local upstream for stream-proxy tests ───────────────────────────────────

def _serve_fake_audio(payload: bytes):
    """Tiny Range-capable HTTP server on an ephemeral port.

    Binds 0.0.0.0 and advertises this host's LAN IP so the deployment host's
    media server (which may be a different machine — Unraid) can reach it
    over the LAN when fetching external stream URLs.
    """
    import socket

    class Handler(BaseHTTPRequestHandler):
        def do_GET(self):
            rng = self.headers.get("Range")
            if rng and rng.startswith("bytes="):
                start_s, _, end_s = rng[6:].partition("-")
                start = int(start_s or 0)
                end = int(end_s) if end_s else len(payload) - 1
                end = min(end, len(payload) - 1)
                body = payload[start : end + 1]
                self.send_response(206)
                self.send_header(
                    "Content-Range", f"bytes {start}-{end}/{len(payload)}"
                )
            else:
                body = payload
                self.send_response(200)
            self.send_header("Content-Type", "audio/mpeg")
            self.send_header("Content-Length", str(len(body)))
            self.send_header("Accept-Ranges", "bytes")
            self.end_headers()
            self.wfile.write(body)

        def log_message(self, *args):
            pass

    server = HTTPServer(("0.0.0.0", 0), Handler)
    port = server.server_address[1]
    # The local IP toward the deployment host (works across the LAN).
    probe = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    try:
        probe.connect((urlparse(WEB_BASE_URL).hostname or "192.168.86.2", 9178))
        lan_ip = probe.getsockname()[0]
    except OSError:
        lan_ip = "127.0.0.1"
    finally:
        probe.close()
    threading.Thread(target=server.serve_forever, daemon=True).start()
    return server, f"http://{lan_ip}:{port}/audio.mp3"


# ── health + basic API shape ────────────────────────────────────────────────

def test_media_server_health_via_nginx(client):
    resp = client.get(f"{MEDIA_API}/healthz")
    assert resp.status_code == 200
    assert resp.json()["ok"] is True


def test_media_library_endpoint(client):
    resp = client.get(f"{MEDIA_API}/library")
    assert resp.status_code == 200
    data = resp.json()
    assert isinstance(data["tracks"], list)
    assert data["version"] >= 1
    for track in data["tracks"]:
        assert {"id", "kind", "title", "status"} <= set(track)


def test_media_search_requires_query(client):
    resp = client.post(f"{MEDIA_API}/search", json={"query": ""})
    assert resp.status_code == 400


def test_media_play_requires_target(client):
    resp = client.post(f"{MEDIA_API}/play", json={"room": TEST_ROOM})
    assert resp.status_code == 400


def test_media_unknown_stream_404(client):
    resp = client.get(f"{MEDIA_API}/stream/does-not-exist")
    assert resp.status_code == 404


# ── player state flow (uses a live stream track as the fixture) ─────────────

def test_media_player_state_flow(client):
    """add stream -> play -> state -> report -> pause -> seek hint -> stop."""
    upstream, url = _serve_fake_audio(b"\x00" * 64)
    try:
        added = client.post(
            f"{MEDIA_API}/streams", json={"name": "Test FM", "url": url}
        )
        assert added.status_code == 200
        track = added.json()["track"]
        track_id = track["id"]
        assert track["kind"] == "stream"
        assert track["status"] == "ready"
        assert track["audio_url"].startswith(f"{MEDIA_API}/stream/")

        played = client.post(
            f"{MEDIA_API}/play", json={"room": TEST_ROOM, "track_id": track_id}
        ).json()
        assert played["desired"] == "playing"
        assert played["track"]["id"] == track_id

        state = client.get(f"{MEDIA_API}/state", params={"room": TEST_ROOM}).json()
        assert state["track"]["id"] == track_id

        client.post(
            f"{MEDIA_API}/report",
            json={"room": TEST_ROOM, "track_id": track_id,
                  "state": "playing", "position": 12.5},
        )
        state = client.get(f"{MEDIA_API}/state", params={"room": TEST_ROOM}).json()
        assert abs(state["reported"]["position"] - 12.5) < 0.01

        client.post(f"{MEDIA_API}/control", json={"room": TEST_ROOM, "action": "pause"})
        assert client.get(f"{MEDIA_API}/state", params={"room": TEST_ROOM}).json()["desired"] == "paused"

        client.post(
            f"{MEDIA_API}/control",
            json={"room": TEST_ROOM, "action": "seek", "position": 42},
        )
        hint = client.get(f"{MEDIA_API}/state", params={"room": TEST_ROOM}).json()["seek_hint"]
        assert hint["position"] == 42

        # start_paused variant: scope transfer without starting playback
        transfer = client.post(
            f"{MEDIA_API}/play",
            json={"room": TEST_ROOM + "-b", "track_id": track_id, "start_paused": True},
        ).json()
        assert transfer["desired"] == "paused"

        # playing clears any open suggestion choices
        client.post(
            f"{MEDIA_API}/choices",
            json={"room": TEST_ROOM, "choices": [{"video_id": "x", "title": "X"}]},
        )
        client.post(
            f"{MEDIA_API}/play", json={"room": TEST_ROOM, "track_id": track_id}
        )
        assert client.get(f"{MEDIA_API}/state", params={"room": TEST_ROOM}).json()["choices"] == []

        stopped = client.post(
            f"{MEDIA_API}/control", json={"room": TEST_ROOM, "action": "stop"}
        ).json()
        assert stopped["desired"] == "stopped"
    finally:
        upstream.shutdown()
        # Remove the test stream from the permanent library.
        try:
            client.delete(f"{MEDIA_API}/tracks/{track_id}")
        except (httpx.HTTPError, UnboundLocalError):
            pass


def test_media_stream_proxy_and_range(client):
    """External audio URLs must be reachable same-origin (HTTPS) and support
    Range passthrough so the browser can seek progressive streams.

    Local deployments test against a controlled fake upstream; remote
    deployments (Unraid) cannot reach the test host's ephemeral ports, so a
    public reference mp3 is used and Range semantics are asserted without
    byte equality."""
    if IS_LOCAL_DEPLOYMENT:
        payload = b"0123456789" * 100
        upstream, url = _serve_fake_audio(payload)
        track_id = None
        try:
            track_id = client.post(
                f"{MEDIA_API}/streams", json={"name": "Range FM", "url": url}
            ).json()["track"]["id"]

            full = client.get(f"{MEDIA_API}/stream/{track_id}")
            assert full.status_code == 200
            assert full.content == payload

            ranged = client.get(
                f"{MEDIA_API}/stream/{track_id}", headers={"Range": "bytes=100-199"}
            )
            assert ranged.status_code == 206
            assert ranged.content == payload[100:200]
            assert ranged.headers["content-range"] == f"bytes 100-199/{len(payload)}"
        finally:
            upstream.shutdown()
            if track_id:
                try:
                    client.delete(f"{MEDIA_API}/tracks/{track_id}")
                except httpx.HTTPError:
                    pass
        return

    # Remote deployment: public reference audio (SoundHelix).
    url = "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3"
    track_id = None
    try:
        track_id = client.post(
            f"{MEDIA_API}/streams", json={"name": "Range FM public", "url": url}
        ).json()["track"]["id"]

        full = client.get(f"{MEDIA_API}/stream/{track_id}")
        assert full.status_code == 200
        assert full.headers.get("content-type", "").startswith("audio/")
        assert len(full.content) > 100_000

        ranged = client.get(
            f"{MEDIA_API}/stream/{track_id}", headers={"Range": "bytes=0-1023"}
        )
        assert ranged.status_code == 206
        assert len(ranged.content) == 1024
        assert (ranged.headers.get("content-range") or "").startswith("bytes 0-1023/")
    finally:
        if track_id:
            try:
                client.delete(f"{MEDIA_API}/tracks/{track_id}")
            except httpx.HTTPError:
                pass


def test_media_files_static_range_support(client):
    """Downloaded tracks are nginx static files with native Range support.

    Writes a probe file into the repo's ./media bind mount, so it only runs
    when the test host IS the deployment host (local dev deployment)."""
    if not IS_LOCAL_DEPLOYMENT:
        pytest.skip("writes to the repo ./media bind mount — local deployments only")
    import pathlib

    marker = uuid.uuid4().hex[:8]
    host_media = pathlib.Path(__file__).parents[1] / "media" / "files"
    host_media.mkdir(parents=True, exist_ok=True)
    fname = f"test-{marker}.mp3"
    payload = b"IMHEADDATA" + b"\x01" * 2048
    (host_media / fname).write_bytes(payload)
    try:
        full = client.get(f"/media/files/{fname}")
        assert full.status_code == 200
        assert full.content == payload

        ranged = client.get(f"/media/files/{fname}", headers={"Range": "bytes=0-9"})
        assert ranged.status_code == 206
        assert ranged.content == b"IMHEADDATA"
    finally:
        (host_media / fname).unlink(missing_ok=True)


def test_media_library_persists_in_volume(client):
    """The library JSON is written to the ./media bind mount (permanent).

    Reads the repo's ./media directory — local deployments only."""
    if not IS_LOCAL_DEPLOYMENT:
        pytest.skip("reads the repo ./media bind mount — local deployments only")
    import pathlib

    upstream, url = _serve_fake_audio(b"\x00" * 16)
    track_id = None
    try:
        track_id = client.post(
            f"{MEDIA_API}/streams", json={"name": "Persist FM", "url": url}
        ).json()["track"]["id"]
        library_file = pathlib.Path(__file__).parents[1] / "media" / "library.json"
        data = json.loads(library_file.read_text())
        assert track_id in data["tracks"]
    finally:
        upstream.shutdown()
        if track_id:
            try:
                client.delete(f"{MEDIA_API}/tracks/{track_id}")
            except httpx.HTTPError:
                pass


# ── web player UI ───────────────────────────────────────────────────────────

def test_ui_media_panel_serves(client):
    resp = client.get("/")
    body = resp.text
    assert 'id="mediaBtn"' in body
    assert 'id="mediaPanel"' in body
    assert 'id="playPauseBtn"' in body
    assert 'id="seekBar"' in body
    assert 'id="mediaAudio"' in body


def test_ui_media_logic_serves(client):
    resp = client.get("/app.js")
    body = resp.text
    assert "reconcileMedia" in body
    assert "media-control" in body          # data-channel topic for the agent
    assert "media_state" in body            # playback state reports
    assert "/media/api/state" in body       # reconciliation polling


def test_ui_media_styles_serve(client):
    resp = client.get("/style.css")
    assert ".media-panel" in resp.text
    assert ".media-row" in resp.text


def test_token_response_includes_room():
    resp = httpx.post(TOKEN_URL, json={}, timeout=10, verify=False)
    assert resp.status_code == 200
    assert resp.json()["room"].startswith("voice-")


# ── Hope's media MCP toolset ────────────────────────────────────────────────
# These spawn the MCP server inside the LOCAL dev container (docker exec),
# whose media server is the local one — they can only be consistent when
# the test target IS the local deployment.

MEDIA_MCP_ENV = {
    "MEDIA_SERVER_URL": "http://127.0.0.1:8093",
    "MEDIA_ROOM": "mcp-test-room",
}

needs_local_container = pytest.mark.skipif(
    not IS_LOCAL_DEPLOYMENT,
    reason="docker-exec MCP probes run against the local dev container",
)


# ── media server internals (in-process, inside the container) ───────────────

@needs_local_container
def test_media_search_prefers_library_matches(client):
    """Search returns ready library matches ahead of YouTube results, so
    Hope prefers an already-downloaded copy. Runs the endpoint in-process
    with _run_search stubbed — fully deterministic, no network."""
    code = '''
import sys
sys.path.insert(0, "/opt/voice")
import media_server as ms
from fastapi.testclient import TestClient

ms._library["tracks"]["libpref01"] = {
    "id": "libpref01", "kind": "youtube", "video_id": "libpref01",
    "title": "Preference Probe Song", "channel": "Probe Artist",
    "duration": 120, "status": "ready", "ext": "webm",
    "error": None, "added_at": 1.0,
}
ms._run_search = lambda q, limit: [
    {"video_id": "remote01", "title": "Preference Probe Song (cover)",
     "channel": "", "duration": 99, "view_count": 1,
     "in_library": False, "track_id": None, "library_status": None},
]

c = TestClient(ms.app)
r = c.post("/media/api/search", json={"query": "preference probe", "limit": 5})
assert r.status_code == 200, r.text
results = r.json()["results"]
assert results, "no results"
assert results[0]["video_id"] == "libpref01", results
assert results[0]["in_library"] is True
assert any(x["video_id"] == "remote01" for x in results), results
print("OK")
'''
    proc = docker_exec_python(code, timeout=60, check=False)
    assert proc.returncode == 0, proc.stderr[-800:]
    assert "OK" in proc.stdout


@needs_local_container
def test_media_stream_endpoint_serves_ready_track(client):
    """GET /media/api/stream/{id} for a finished youtube track serves the
    file bytes with native Range support (progressive-playback endpoint)."""
    code = '''
import sys
sys.path.insert(0, "/opt/voice")
import media_server as ms
from fastapi.testclient import TestClient

probe = ms.FILES_DIR / "probetrk.mp3"
probe.write_bytes(b"PROBEDATA" * 100)
ms._library["tracks"]["probetrk"] = {
    "id": "probetrk", "kind": "youtube", "video_id": "probetrk",
    "title": "Probe", "channel": "", "duration": 1,
    "status": "ready", "ext": "mp3", "error": None, "added_at": 1.0,
}
try:
    c = TestClient(ms.app)
    full = c.get("/media/api/stream/probetrk")
    assert full.status_code == 200, full.status_code
    assert full.content == b"PROBEDATA" * 100
    part = c.get("/media/api/stream/probetrk", headers={"Range": "bytes=0-8"})
    assert part.status_code == 206, part.status_code
    assert part.content == b"PROBEDATA"
    assert (part.headers.get("content-range") or "").startswith("bytes 0-8/")
    # track dict exposes a stable stream URL while downloading and ready
    d = ms._track_dict(ms._library["tracks"]["probetrk"])
    assert d["audio_url"] == "/media/api/stream/probetrk", d
    print("OK")
finally:
    probe.unlink(missing_ok=True)
    ms._library["tracks"].pop("probetrk", None)
'''
    proc = docker_exec_python(code, timeout=60, check=False)
    assert proc.returncode == 0, proc.stderr[-800:]
    assert "OK" in proc.stdout


@needs_local_container
def test_mcp_media_list_library(mcp_client_factory):
    text, is_error = mcp_client_factory(
        "media_mcp.py", "list_library", {}, env=MEDIA_MCP_ENV
    )
    assert not is_error
    assert "library" in text.lower()


@needs_local_container
def test_mcp_media_add_stream_and_now_playing(mcp_client_factory, client):
    upstream, url = _serve_fake_audio(b"\x00" * 16)
    try:
        text, is_error = mcp_client_factory(
            "media_mcp.py", "add_stream",
            {"name": "MCP Test Radio", "url": url}, env=MEDIA_MCP_ENV,
        )
        assert not is_error, text
        assert "Added" in text

        library = client.get(f"{MEDIA_API}/library").json()["tracks"]
        probe = next(t for t in library if t["title"] == "MCP Test Radio")
        try:
            text, is_error = mcp_client_factory(
                "media_mcp.py", "now_playing", {}, env=MEDIA_MCP_ENV
            )
            assert not is_error
            # Nothing loaded in mcp-test-room: the tool must say so plainly.
            assert "Nothing is loaded" in text

            client.post(
                f"{MEDIA_API}/play", json={"room": "mcp-test-room", "track_id": probe["id"]}
            )
            text, is_error = mcp_client_factory(
                "media_mcp.py", "now_playing", {}, env=MEDIA_MCP_ENV
            )
            assert not is_error
            assert "MCP Test Radio" in text
        finally:
            client.delete(f"{MEDIA_API}/tracks/{probe['id']}")
    finally:
        upstream.shutdown()


@needs_local_container
def test_mcp_media_resume_without_load(mcp_client_factory, client):
    """Errors from the media server reach the LLM as tool text (not MCP
    errors) so Hope can explain them naturally."""
    client.post(
        f"{MEDIA_API}/control", json={"room": "mcp-empty-room", "action": "stop"}
    )
    text, is_error = mcp_client_factory(
        "media_mcp.py", "resume_music", {}, env={
            "MEDIA_SERVER_URL": "http://127.0.0.1:8093",
            "MEDIA_ROOM": "mcp-empty-room",
        }
    )
    assert not is_error
    assert "nothing loaded" in text.lower()


# ── live YouTube Music (network-dependent) ──────────────────────────────────

@pytest.mark.slow
def test_media_search_live(client):
    resp = client.post(
        f"{MEDIA_API}/search",
        json={"query": "blind guardian timeless miracle", "limit": 3},
    )
    assert resp.status_code == 200
    results = resp.json()["results"]
    assert len(results) >= 1
    for r in results:
        assert r["video_id"]
        assert r["title"]


@pytest.mark.slow
def test_media_download_and_stream_end_to_end(client):
    """Full pipeline: search -> play -> yt-dlp download -> playable stream.
    The audio_url stays on /media/api/stream/ for the whole lifecycle; once
    ready it serves the finished file with Range support. Gated: run with
    HOPE_RUN_YTDLP_DOWNLOAD=1 (takes 1-3 minutes)."""
    if os.environ.get("HOPE_RUN_YTDLP_DOWNLOAD") != "1":
        pytest.skip("set HOPE_RUN_YTDLP_DOWNLOAD=1 to run the real download")

    search = client.post(
        f"{MEDIA_API}/search", json={"query": "kingdom hearts dearly beloved", "limit": 3}
    )
    results = search.json()["results"]
    assert results, "search returned nothing"
    video = results[0]

    played = client.post(
        f"{MEDIA_API}/play",
        json={"room": TEST_ROOM, "video_id": video["video_id"],
              "title": video["title"], "channel": video["channel"]},
    ).json()
    track_id = played["track"]["id"]

    try:
        deadline = time.time() + 240
        track = played["track"]
        while time.time() < deadline:
            library = client.get(f"{MEDIA_API}/library").json()["tracks"]
            track = next(t for t in library if t["id"] == track_id)
            if track["status"] in ("ready", "failed"):
                break
            time.sleep(3)
        assert track["status"] == "ready", f"download failed: {track.get('error')}"

        stream = client.get(track["audio_url"], headers={"Range": "bytes=0-1023"})
        assert stream.status_code in (200, 206)
        assert len(stream.content) >= 1
    finally:
        client.delete(f"{MEDIA_API}/tracks/{track_id}")