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from PySide2.QtCore import QBasicTimer
from PySide2.QtGui import QColor, QFontMetrics, QPainter, QPalette
from PySide2.QtWidgets import QWidget


class WigglyWidget(QWidget):
    def __init__(self, parent=None):
        super(WigglyWidget, self).__init__(parent)
        self.step = 0
        self.text = ""
        self.setBackgroundRole(QPalette.Midlight)
        self.setAutoFillBackground(True)

        newFont = self.font()
        newFont.setPointSize(newFont.pointSize() + 20)
        self.setFont(newFont)

        self.timer = QBasicTimer()
        self.timer.start(60, self)

    def paintEvent(self, event):
        sineTable = [0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100,
                     -92, -71, -38]

        metrics = QFontMetrics(self.font())
        x = (self.width() - metrics.horizontalAdvance(self.text)) / 2
        y = (self.height() + metrics.ascent() - metrics.descent()) / 2
        color = QColor()

        painter = QPainter(self)
        for i in range(len(self.text)):
            index = (self.step + i) % 16
            color.setHsv((15 - index) * 16, 255, 191)
            painter.setPen(color)
            painter.drawText(x, y - ((sineTable[index] * metrics.height()) / 400),
                             str(self.text[i]))
            x += metrics.horizontalAdvance(self.text[i])

    def timerEvent(self, event):
        if event.timerId() == self.timer.timerId():
            self.step += 1
            self.update()
        else:
            QWidget.timerEvent(event)

    def setText(self, text):
        self.text = text
