"""Icônes WGSecure — bouclier VPN dessiné via QPainter."""
from PyQt6.QtGui import (
    QIcon, QPixmap, QPainter, QColor, QBrush, QPen,
    QFont, QPainterPath, QLinearGradient,
)
from PyQt6.QtCore import Qt, QRect, QPointF


def _shield(
    size: int,
    body_top: str,
    body_bot: str,
    dot_color: str,
    dot: bool = True,
) -> QPixmap:
    """Dessine un bouclier avec dégradé vertical et un indicateur coloré."""
    pix = QPixmap(size, size)
    pix.fill(Qt.GlobalColor.transparent)
    p = QPainter(pix)
    p.setRenderHint(QPainter.RenderHint.Antialiasing)

    s = size
    m = s * 0.06          # marge

    # --- Forme bouclier ---
    path = QPainterPath()
    path.moveTo(s / 2, m)
    path.lineTo(s - m, s * 0.25)
    path.cubicTo(
        s - m,       s * 0.65,
        s * 0.72,    s * 0.85,
        s / 2,       s - m,
    )
    path.cubicTo(
        s * 0.28,    s * 0.85,
        m,           s * 0.65,
        m,           s * 0.25,
    )
    path.closeSubpath()

    # Dégradé vertical corps du bouclier
    grad = QLinearGradient(QPointF(s / 2, m), QPointF(s / 2, s - m))
    grad.setColorAt(0.0, QColor(body_top))
    grad.setColorAt(1.0, QColor(body_bot))
    p.setBrush(QBrush(grad))
    p.setPen(Qt.PenStyle.NoPen)
    p.drawPath(path)

    # Liseré blanc semi-transparent
    pen = QPen(QColor(255, 255, 255, 60))
    pen.setWidthF(s * 0.04)
    p.setPen(pen)
    p.setBrush(Qt.BrushStyle.NoBrush)
    p.drawPath(path)

    # --- "W" centré ---
    p.setPen(QPen(QColor(255, 255, 255, 230)))
    font = QFont("Arial", max(7, int(s * 0.38)), QFont.Weight.Bold)
    p.setFont(font)
    rect = QRect(int(s * 0.08), int(s * 0.22), int(s * 0.84), int(s * 0.55))
    p.drawText(rect, Qt.AlignmentFlag.AlignCenter, "W")

    # --- Point de statut (coin bas-droit) ---
    if dot:
        dr = s * 0.22
        dx = s - m - dr * 0.5
        dy = s * 0.68
        # Halo blanc
        p.setPen(Qt.PenStyle.NoPen)
        p.setBrush(QBrush(QColor(255, 255, 255, 200)))
        p.drawEllipse(QPointF(dx, dy), dr * 0.72, dr * 0.72)
        # Dot coloré
        p.setBrush(QBrush(QColor(dot_color)))
        p.drawEllipse(QPointF(dx, dy), dr * 0.55, dr * 0.55)

    p.end()
    return pix


def icon_connected(size: int = 32) -> QIcon:
    return QIcon(_shield(size, "#1a7a4a", "#0d5c35", "#2ecc71", dot=True))


def icon_disconnected(size: int = 32) -> QIcon:
    return QIcon(_shield(size, "#2c3e50", "#1a252f", "#e74c3c", dot=True))


def icon_connecting(size: int = 32) -> QIcon:
    return QIcon(_shield(size, "#7d5a00", "#4a3500", "#f39c12", dot=True))


def icon_app(size: int = 32) -> QIcon:
    """Icône principale multi-tailles — bouclier bleu sans point de statut.
    Plusieurs résolutions pour la barre des tâches, l'alt-tab et le systray."""
    ico = QIcon()
    for s in (16, 24, 32, 48, 64, 128, 256):
        ico.addPixmap(_shield(s, "#2980b9", "#1a5276", "#ffffff", dot=False))
    return ico


def icon_admin(size: int = 32) -> QIcon:
    return QIcon(_shield(size, "#6c3483", "#4a235a", "#9b59b6", dot=True))


def pixmap_app(size: int = 64) -> QPixmap:
    return _shield(size, "#2980b9", "#1a5276", "#ffffff", dot=False)