import re

from PyQt6.QtCore import QSize, Qt, QRect
from PyQt6.QtGui import QColor, QPainter, QPixmap, QIcon, QBrush, QPen, QPaintEngine
from PyQt6.QtWidgets import QWidget, QHBoxLayout, QPushButton, QColorDialog, QSizePolicy, QComboBox


class ColorButton(QWidget):
    def __init__(self, color: str):
        super(QWidget, self).__init__()

        self.setSizePolicy(QSizePolicy(QSizePolicy.Policy.Fixed, QSizePolicy.Policy.Fixed))
        self.layout = QHBoxLayout(self)

        self.color = color

        colors = ['aliceblue', 'antiquewhite', 'aqua', 'aquamarine', 'azure', 'beige', 'bisque', 'black',
                  'blanchedalmond', 'blue', 'blueviolet', 'brown', 'burlywood', 'cadetblue', 'chartreuse', 'chocolate',
                  'coral', 'cornflowerblue', 'cornsilk', 'crimson', 'cyan', 'darkblue', 'darkcyan', 'darkgoldenrod',
                  'darkgray', 'darkgreen', 'darkgrey', 'darkkhaki', 'darkmagenta', 'darkolivegreen', 'darkorange',
                  'darkorchid', 'darkred', 'darksalmon', 'darkseagreen', 'darkslateblue', 'darkslategray',
                  'darkslategrey', 'darkturquoise', 'darkviolet', 'deeppink', 'deepskyblue', 'dimgray', 'dimgrey',
                  'dodgerblue', 'firebrick', 'floralwhite', 'forestgreen', 'fuchsia', 'gainsboro', 'ghostwhite', 'gold',
                  'goldenrod', 'gray', 'green', 'greenyellow', 'grey', 'honeydew', 'hotpink', 'indianred', 'indigo',
                  'ivory', 'khaki', 'lavender', 'lavenderblush', 'lawngreen', 'lemonchiffon', 'lightblue', 'lightcoral',
                  'lightcyan', 'lightgoldenrodyellow', 'lightgray', 'lightgreen', 'lightgrey', 'lightpink',
                  'lightsalmon', 'lightseagreen', 'lightskyblue', 'lightslategray', 'lightslategrey', 'lightsteelblue',
                  'lightyellow', 'lime', 'limegreen', 'linen', 'magenta', 'maroon', 'mediumaquamarine', 'mediumblue',
                  'mediumorchid', 'mediumpurple', 'mediumseagreen', 'mediumslateblue', 'mediumspringgreen',
                  'mediumturquoise', 'mediumvioletred', 'midnightblue', 'mintcream', 'mistyrose', 'moccasin',
                  'navajowhite', 'navy', 'oldlace', 'olive', 'olivedrab', 'orange', 'orangered', 'orchid',
                  'palegoldenrod', 'palegreen', 'paleturquoise', 'palevioletred', 'papayawhip', 'peachpuff', 'peru',
                  'pink', 'plum', 'powderblue', 'purple', 'red', 'rosybrown', 'royalblue', 'saddlebrown', 'salmon',
                  'sandybrown', 'seagreen', 'seashell', 'sienna', 'silver', 'skyblue', 'slateblue', 'slategray',
                  'slategrey', 'snow', 'springgreen', 'steelblue', 'tan', 'teal', 'thistle', 'tomato', 'transparent',
                  'turquoise', 'violet', 'wheat', 'white', 'whitesmoke', 'yellow', 'yellowgreen']
        colors = {
            self.tr('Hot Pink'): 'ffaebc',
            self.tr('Light Coral'): 'f08080',
            self.tr('Red'): 'cc0000',
            self.tr('Orange'): 'fcaf3e',
            self.tr('Dark Orange'): 'ce5c00',
            self.tr('Yellow'): 'fce94f',
            self.tr('Dark Yellow'): 'c4a000',
            self.tr('Mint'): 'b4f8c8',
            self.tr('Green'): '8ae234',
            self.tr('Dark Green'): '439a06',
            self.tr('Tiffany Blue'): 'a0e7e5',
            self.tr('Blue'): '729fcf',
            self.tr('Dark Blue'): '3465a4',
            self.tr('Purple'): 'ad7fa8',
            self.tr('Dark Purple'): '5c3566',
            self.tr('Brown'): 'e9b96e',
            self.tr('Dark Brown'): 'c17d11',
            self.tr('Grey'): 'd3d7cf',
            self.tr('Dark Grey'): '888a85',
            self.tr('Brewer Light Blue'): 'ece7f2',
            self.tr('Brewer Blue'): 'a6bddb',
            self.tr('Brewer Dark Blue'): '2b8cbe',
            self.tr('Brewer Light Red'): 'fee8c8',
            self.tr('Brewer Red'): 'fdbb84',
            self.tr('Brewer Dark Red'): 'e34a33',
        }

        self.color_drop_down = QComboBox()
        self.layout.addWidget(self.color_drop_down)
        self.color_drop_down.addItem("transparent", "None")
        for color_name in colors.keys():
            color_value = colors[color_name]
            self.color_drop_down.addItem(QIcon(self._color_pixmap(color_value)), color_name, color_value)

        self.color_drop_down.currentIndexChanged.connect(self._color_selected)

        self.btn_color_picker = QPushButton(self.tr("custom"))
        self.layout.addWidget(self.btn_color_picker)
        self.btn_color_picker.pressed.connect(self._update_color)
        self.btn_color_picker.setSizePolicy(QSizePolicy(QSizePolicy.Policy.Fixed, QSizePolicy.Policy.Fixed))

    def _color_selected(self, index: int):
        self.color = self.color_drop_down.currentData()
        print(self.color)

    def set_color(self, color: str):
        self.color = color
        for index in range(0, self.color_drop_down.count()):
            item_value = self.color_drop_down.itemData(index)
            if item_value == color:
                self.color_drop_down.setCurrentIndex(index)
                return

        # color not yet present -> add it
        self.color_drop_down.addItem(QIcon(self._color_pixmap(color)), color, color)
        self.color_drop_down.setCurrentIndex(self.color_drop_down.count() - 1)

    def _update_color(self):
        new_color = QColorDialog.getColor(self._to_qcolor(self.color))
        if new_color.isValid():
            color = self._to_hex(new_color)
            self.set_color(color)

    @staticmethod
    def _is_hex_color(color: str):
        return re.match("[0-9a-f]{6}", color, flags=re.IGNORECASE)

    def _color_pixmap(self, color: str) -> QPixmap:
        pixmap = QPixmap(40, 40)
        qcolor = self._to_qcolor(color)
        pixmap.fill((qcolor))
        return pixmap

    def _to_qcolor(self, color: str):
        if self._is_hex_color(color):
            red = int(color[0:2], 16)
            green = int(color[2:4], 16)
            blue = int(color[4:6], 16)
            return QColor(red, green, blue)
        elif color in QColor().colorNames():
            return QColor(color)
        return QColor(255, 255, 255)

    def _to_hex(self, color: QColor) -> str:
        red = "{0:0{1}x}".format(color.red(), 2)
        green = "{0:0{1}x}".format(color.green(), 2)
        blue = "{0:0{1}x}".format(color.blue(), 2)
        return red + green + blue