"""Progress on the dock icon, via `com.canonical.Unity.LauncherEntry`.

A signal, not a service: anything listening (Plasma's task manager, Dash to
Dock, Latte) picks it up, and nothing breaks where nobody listens. The result is
a progress bar filling under the icon as the interval runs and a badge with the
pomodoro count for the day — the timer stays readable with the window closed.
"""

from __future__ import annotations

from PyQt6.QtCore import QVariant
from PyQt6.QtDBus import QDBusConnection, QDBusMessage

_PATH = "/org/kadence/Desktop"
_IFACE = "com.canonical.Unity.LauncherEntry"
_APP_URI = "application://kadence.desktop"


class LauncherEntry:
    def __init__(self) -> None:
        self._bus = QDBusConnection.sessionBus()

    def update(self, *, progress: float | None = None, count: int | None = None, urgent: bool = False) -> None:
        """Push a new state. `progress` is 0..1; `count` is the badge number."""
        properties: dict[str, QVariant] = {}
        if progress is None:
            properties["progress-visible"] = QVariant(False)
        else:
            properties["progress"] = QVariant(max(0.0, min(1.0, progress)))
            properties["progress-visible"] = QVariant(True)
        if count is None:
            properties["count-visible"] = QVariant(False)
        else:
            properties["count"] = QVariant(int(count))
            properties["count-visible"] = QVariant(True)
        properties["urgent"] = QVariant(bool(urgent))

        message = QDBusMessage.createSignal(_PATH, _IFACE, "Update")
        message.setArguments([_APP_URI, properties])
        self._bus.send(message)

    def clear(self) -> None:
        self.update(progress=None, count=None, urgent=False)