"""Icono de bandeja del sistema."""

import sys
from pathlib import Path

from PySide6.QtCore import Qt
from PySide6.QtGui import QColor, QIcon, QPainter, QPixmap

_ASSETS_DIR = Path(__file__).resolve().parent.parent.parent / "packaging" / "assets"


def _generated_tray_icon() -> QIcon:
    """Icono simple en memoria si no hay archivo empaquetado."""
    size = 32
    pixmap = QPixmap(size, size)
    pixmap.fill(Qt.GlobalColor.transparent)
    painter = QPainter(pixmap)
    painter.setRenderHint(QPainter.RenderHint.Antialiasing)
    painter.setBrush(QColor(0, 120, 215))
    painter.setPen(Qt.PenStyle.NoPen)
    painter.drawRoundedRect(2, 2, size - 4, size - 4, 6, 6)
    painter.setPen(QColor(255, 255, 255))
    font = painter.font()
    font.setBold(True)
    font.setPointSize(14)
    painter.setFont(font)
    painter.drawText(pixmap.rect(), Qt.AlignmentFlag.AlignCenter, "C")
    painter.end()
    return QIcon(pixmap)


def load_tray_icon() -> QIcon:
    """Carga icono de bandeja desde assets empaquetados o genera uno por defecto."""
    candidates: list[Path] = []
    meipass = getattr(sys, "_MEIPASS", None)
    if meipass:
        base = Path(meipass)
        candidates.extend(
            [
                base / "packaging" / "assets" / "tray-icon.png",
                base / "packaging" / "assets" / "tray-icon.ico",
            ]
        )
    candidates.extend(
        [
            _ASSETS_DIR / "tray-icon.png",
            _ASSETS_DIR / "tray-icon.ico",
        ]
    )
    for path in candidates:
        if path.is_file():
            icon = QIcon(str(path))
            if not icon.isNull():
                return icon
    return _generated_tray_icon()