import sys


class CTkColorManager:

    WINDOW_BG = ("#ECECEC", "#323232")  # macOS standard light and dark window bg colors
    MAIN = ("#1C94CF", "#1C94CF")
    MAIN_HOVER = ("#5FB4DD", "#5FB4DD")
    ENTRY = ("white", "#222222")
    TEXT = ("black", "white")
    SLIDER_BG = ("#6B6B6B", "#222222")
    PROGRESS_BG = ("#6B6B6B", "#222222")
    FRAME = ("#D4D5D6", "#3F3F3F")
    FRAME_2 = ("#BFBEC1", "#505050")
    CHECKBOX_LINES = ("black", "#ededed")

    DARKEN_COLOR_FACTOR = 0.8  # used to generate color for disabled button

    @staticmethod
    def single_color(color, appearance_mode: int) -> str:
        """ color can be either a single hex color string or a color name or it can be a
            tuple color with (light_color, dark_color). The functions then returns
            always a single color string """

        if type(color) == tuple:
            return color[appearance_mode]
        else:
            return color

    @staticmethod
    def rgb2hex(rgb_color: tuple) -> str:
        return "#{:02x}{:02x}{:02x}".format(round(rgb_color[0]), round(rgb_color[1]), round(rgb_color[2]))

    @staticmethod
    def hex2rgb(hex_color: str) -> tuple:
        return tuple(int(hex_color.strip("#")[i:i+2], 16) for i in (0, 2, 4))

    @staticmethod
    def darken_hex_color(hex_color: str) -> str:
        try:
            rgb_color = CTkColorManager.hex2rgb(hex_color)
            dark_rgb_color = (rgb_color[0] * CTkColorManager.DARKEN_COLOR_FACTOR,
                              rgb_color[1] * CTkColorManager.DARKEN_COLOR_FACTOR,
                              rgb_color[2] * CTkColorManager.DARKEN_COLOR_FACTOR)
            return CTkColorManager.rgb2hex(dark_rgb_color)
        except Exception as err:
            sys.stderr.write("ERROR (CTkColorManager): failed to darken the following color: " + str(hex_color) + " " + str(err))
            return hex_color

    @classmethod
    def set_theme_color(cls, hex_color: str, hex_color_hover: str):
        cls.MAIN = hex_color
        cls.MAIN_HOVER = hex_color_hover

    @classmethod
    def set_theme(cls, main_color: str):
        if main_color.lower() == "green":
            cls.set_theme_color("#2EDEA4", "#82FCD4")

        elif main_color.lower() == "blue":
            cls.set_theme_color("#1C94CF", "#5FB4DD")

        else:
            sys.stderr.write("WARNING (CTkColorManager): No such color theme available: {}\n".format(main_color))