"""Home Assistant MQTT discovery publishing for the video player.

This module deliberately reuses the player's existing MQTT client.  It does
not create another connection or change any of the player's MQTT topics.
"""

import json
from typing import Any, Dict


def _publish_sensor(
    client: Any,
    *,
    discovery_prefix: str,
    device_id: str,
    device_name: str,
    telemetry_topic: str,
    status_topic: str,
    entity_id: str,
    name: str,
    value_template: str,
    icon: str = "",
    unit: str = "",
) -> None:
    topic = f"{discovery_prefix}/sensor/{device_id}/{entity_id}/config"
    payload: Dict[str, Any] = {
        "name": name,
        "unique_id": f"{device_id}_{entity_id}",
        "state_topic": telemetry_topic,
        "value_template": value_template,
        "availability_topic": status_topic,
        "availability_template": "{% if value_json.state != 'offline' %}online{% else %}offline{% endif %}",
        "payload_available": "online",
        "payload_not_available": "offline",
        "device": {
            "identifiers": [device_id],
            "name": device_name,
            "manufacturer": "Custom",
            "model": "mpv mqtt player",
        },
    }

    if icon:
        payload["icon"] = icon
    if unit:
        payload["unit_of_measurement"] = unit

    client.publish(topic, json.dumps(payload), qos=1, retain=True)


def publish_discovery(
    client: Any,
    *,
    discovery_prefix: str,
    device_id: str,
    device_name: str,
    telemetry_topic: str,
    status_topic: str,
) -> None:
    """Publish the same nine retained discovery sensors used historically."""
    sensors = (
        ("position", "YT Position (s)", "{{ value_json.position }}", "mdi:timeline-clock", "s"),
        ("duration", "YT Duration (s)", "{{ value_json.duration }}", "mdi:timer", "s"),
        ("remaining", "YT Remaining (s)", "{{ value_json.remaining }}", "mdi:timer-sand", "s"),
        ("position_fmt", "YT Position", "{{ value_json.position_fmt }}", "mdi:timeline-clock", ""),
        ("duration_fmt", "YT Duration", "{{ value_json.duration_fmt }}", "mdi:timer", ""),
        ("remaining_fmt", "YT Remaining", "{{ value_json.remaining_fmt }}", "mdi:timer-sand", ""),
        ("title", "YT Title", "{{ value_json.title }}", "mdi:music", ""),
        ("paused", "YT Paused", "{{ value_json.paused }}", "mdi:pause-circle", ""),
        ("slot", "YT Slot", "{{ value_json.slot }}", "mdi:playlist-play", ""),
    )

    for entity_id, name, template, icon, unit in sensors:
        _publish_sensor(
            client,
            discovery_prefix=discovery_prefix,
            device_id=device_id,
            device_name=device_name,
            telemetry_topic=telemetry_topic,
            status_topic=status_topic,
            entity_id=entity_id,
            name=name,
            value_template=template,
            icon=icon,
            unit=unit,
        )