"""
Emoji/Unicode icon helpers — no external icon pack dependency.
All icons are rendered from Unicode characters by Qt.
"""
from PyQt6.QtGui import QIcon, QPixmap, QPainter, QFont, QColor
from PyQt6.QtCore import Qt, QSize


# ── Unicode glyph map ─────────────────────────────────────────────────────────
ICONS = {
    # Connections
    "connection":   "🔌",
    "connected":    "🟢",
    "disconnected": "🔴",

    # Schema tree
    "database":     "🗄️",
    "table":        "📋",
    "view":         "👁️",
    "column":       "📊",
    "index":        "🔍",
    "primary_key":  "🔑",
    "foreign_key":  "🔗",
    "function":     "⚡",
    "procedure":    "📦",
    "trigger":      "⚙️",
    "folder":       "📁",
    "folder_open":  "📂",

    # Actions
    "run":          "▶️",
    "stop":         "⏹️",
    "explain":      "🔎",
    "new_tab":      "➕",
    "save":         "💾",
    "open":         "📂",
    "export":       "📤",
    "import":       "📥",
    "refresh":      "🔄",
    "delete":       "🗑️",
    "edit":         "✏️",
    "add":          "➕",
    "commit":       "✅",
    "rollback":     "↩️",
    "history":      "📜",
    "filter":       "🔍",
    "copy":         "📋",
    "clear":        "🧹",
    "settings":     "⚙️",
    "help":         "❓",
    "info":         "ℹ️",
    "warning":      "⚠️",
    "error":        "❌",
    "success":      "✅",
    "kill":         "🛑",
    "disconnect":   "🔌",

    # DB Types
    "mysql":        "🐬",
    "postgresql":   "🐘",
    "sqlite":       "📁",
    "mssql":        "🪟",
}


def make_icon(glyph: str, size: int = 20,
              fg: str = "#cdd6f4", bg: str = "transparent") -> QIcon:
    """Create a QIcon from a Unicode glyph."""
    px = QPixmap(QSize(size, size))
    px.fill(Qt.GlobalColor.transparent)
    painter = QPainter(px)
    painter.setRenderHint(QPainter.RenderHint.Antialiasing)
    font = QFont()
    font.setPointSize(int(size * 0.55))
    painter.setFont(font)
    painter.setPen(QColor(fg))
    painter.drawText(px.rect(), Qt.AlignmentFlag.AlignCenter, glyph)
    painter.end()
    return QIcon(px)


def get_icon(name: str, size: int = 20) -> QIcon:
    """Get a named icon. Falls back to a question mark if unknown."""
    glyph = ICONS.get(name, "❓")
    return make_icon(glyph, size)