import { Slider, HorizontalBox, Button, LineEdit } from "std-widgets.slint";

export component ColourSlider inherits VerticalLayout {
    spacing: 10px;
    property <string> hex: "#FF0000";
    property <color> base_colour: Colors.red;
    in-out property <color> final_colour: Colors.red;
    in-out property <brush> colourbox: final_colour;
    callback hex_to_colour(string) -> color;
    // required
    callback set_hex_from_colour(color) -> string;
    /// This callback is required until slint adds direct acces to color channels
    callback blend_colour(color, color, float) -> color;
    callback blend_lightness(color, float) -> color;
    pure callback set_hue(color) -> float;
    pure callback set_bright(color) -> float;
    in-out property <float> c1value<=> c1.value;
    in-out property <float> c2value<=> c2.value;
    property <[color]> base_colours: [
        Colors.rgb( 255, 0, 0),
        Colors.rgb( 255, 128, 0),
        Colors.rgb( 255, 255, 0),
        Colors.rgb( 128, 255, 0),
        Colors.rgb( 0, 255, 0),
        Colors.rgb( 0, 255, 128),
        Colors.rgb( 0, 255, 255),
        Colors.rgb( 0, 128, 255),
        Colors.rgb( 0, 0, 255),
        Colors.rgb( 127, 0, 255),
        Colors.rgb( 255, 0, 255),
        Colors.rgb( 255, 0, 127),
        Colors.rgb( 128, 128, 128)
    ];
    property <[color]> base_shade: [
        base_colour.with-alpha(100%),
        base_colour.with-alpha(90%),
        base_colour.with-alpha(80%),
        base_colour.with-alpha(70%),
        base_colour.with-alpha(60%),
        base_colour.with-alpha(50%),
        base_colour.with-alpha(40%),
        base_colour.with-alpha(30%),
        base_colour.with-alpha(20%),
        base_colour.with-alpha(10%),
        base_colour.with-alpha(0%)
    ];
    function set_base_colour() {
        root.base_colour = blend_colour(base_colours[c1.value], base_colours[c1.value + 1], c1.value - Math.floor(c1.value));
        root.final_colour = blend_lightness(base_colour, (base_shade.length - c2.value) / base_shade.length);
        root.colourbox = root.final_colour;
    }
    callback external_colour_change();
    external_colour_change => {
        c1.value = 13 * (root.set_hue(root.final_colour) / 360);
        c2.value = 11 - (11 * (root.set_bright(root.final_colour) / 0.5));
        root.set_base_colour();
    }
    Rectangle {
        height: 32px;
        // 13 colours
        background: @linear-gradient(90deg, base_colours[0], base_colours[1], base_colours[2], base_colours[3], base_colours[4], base_colours[5], base_colours[6], base_colours[7], base_colours[8], base_colours[9], base_colours[10], base_colours[11], base_colours[12]);
        clip: true;
        border-radius: 6px;
        c1 := Slider {
            width: parent.width;
            height: parent.height;
            minimum: 0;
            maximum: 12;
            changed => {
                set_base_colour();
                hex = set_hex_from_colour(final_colour);
            }
            init => {
                self.value = 13 * (root.set_hue(root.final_colour) / 360);
            }
        }
    }

    Rectangle {
        height: 32px;
        // 11 colours
        background: @linear-gradient(90deg, base_shade[0], base_shade[1], base_shade[2], base_shade[3], base_shade[4], base_shade[5], base_shade[6], base_shade[7], base_shade[8], base_shade[9], base_shade[10]);
        clip: true;
        border-radius: 6px;
        c2 := Slider {
            width: parent.width;
            height: parent.height;
            minimum: 0;
            maximum: 11;
            changed => {
                set_base_colour();
                hex = set_hex_from_colour(final_colour);
            }
            init => {
                self.value = 12 - (12 * (root.set_bright(root.final_colour) / 0.5));
                root.set_base_colour();
            }
        }
    }

    HorizontalLayout {
        LineEdit {
            // width: 50%;
            text <=> root.hex;
            edited => {
                base_colour = hex_to_colour(self.text);
                root.colourbox = base_colour;
            }
        }

        Rectangle {
            width: self.height;
            background <=> root.colourbox;
        }
    }
}

component ColorButton {
    callback select<=>i_touch_area.clicked;
    in property <brush> color<=> i_container.background;
    in property <bool> selected;
    height: self.width;
    i_container := Rectangle {
        border_width: 2px;
    }

    i_touch_area := TouchArea { }

    states [
        selected when selected: {
            i_container.border_color: Colors.black;
        }
    ]
}

export component ColorPicker {
    height: palette.length * 1px / colors_per_row / 1px * color_size;
    private property <int> selected_color_index;
    in-out property <float> colors_per_row: 13.0;
    private property <length> color_size: self.width / colors_per_row;
    out property <color> selected_color: palette[selected_color_index];
    callback selected(color);
    in property <[color]> palette: [
        Colors.rgb(51,0,0),
        Colors.rgb(51,25,0),
        Colors.rgb(51,51,0),
        Colors.rgb(25,51,0),
        Colors.rgb(0,51,0),
        Colors.rgb(0,51,25),
        Colors.rgb(0,51,51),
        Colors.rgb(0,25,51),
        Colors.rgb(0,0,51),
        Colors.rgb(25,0,51),
        Colors.rgb(51,0,51),
        Colors.rgb(51,0,25),
        Colors.rgb(0,0,0),
        //
        Colors.rgb(102,0,0),
        Colors.rgb(102,51,0),
        Colors.rgb(102,102,0),
        Colors.rgb(51,102,0),
        Colors.rgb(0,102,0),
        Colors.rgb(0,102,51),
        Colors.rgb(0,102,102),
        Colors.rgb(0,51,102),
        Colors.rgb(0,0,102),
        Colors.rgb(51,0,102),
        Colors.rgb(102,0,102),
        Colors.rgb(102,0,51),
        Colors.rgb(32,32,32),
        //
        Colors.rgb(153,0,0),
        Colors.rgb(153,76,0),
        Colors.rgb(153,153,0),
        Colors.rgb(76,153,0),
        Colors.rgb(0,153,0),
        Colors.rgb(0,153,76),
        Colors.rgb(0,153,153),
        Colors.rgb(0,76,153),
        Colors.rgb(0,0,153),
        Colors.rgb(76,0,153),
        Colors.rgb(153,0,153),
        Colors.rgb(153,0,76),
        Colors.rgb(64,64,64),
        //
        Colors.rgb(204,0,0),
        Colors.rgb(204,102,0),
        Colors.rgb(204,204,0),
        Colors.rgb(102,204,0),
        Colors.rgb(0,204,0),
        Colors.rgb(0,204,102),
        Colors.rgb(0,204,204),
        Colors.rgb(0,102,204),
        Colors.rgb(0,0,204),
        Colors.rgb(102,0,204),
        Colors.rgb(204,0,204),
        Colors.rgb(204,0,102),
        Colors.rgb(96,96,96),
        //
        Colors.rgb(255,0,0),
        Colors.rgb(255,128,0),
        Colors.rgb(255,255,0),
        Colors.rgb(128,255,0),
        Colors.rgb(0,255,0),
        Colors.rgb(0,255,128),
        Colors.rgb(0,255,255),
        Colors.rgb(0,128,255),
        Colors.rgb(0,0,255),
        Colors.rgb(128,0,255),
        Colors.rgb(255,0,255),
        Colors.rgb(255,0,128),
        Colors.rgb(128,128,128),
        //
        Colors.rgb(255,51,51),
        Colors.rgb(255,153,51),
        Colors.rgb(255,255,51),
        Colors.rgb(153,255,51),
        Colors.rgb(51,255,51),
        Colors.rgb(51,255,153),
        Colors.rgb(51,255,255),
        Colors.rgb(51,153,255),
        Colors.rgb(51,51,255),
        Colors.rgb(153,51,255),
        Colors.rgb(255,51,255),
        Colors.rgb(255,51,153),
        Colors.rgb(160,160,160),
        //
        Colors.rgb(255,102,102),
        Colors.rgb(255,178,102),
        Colors.rgb(255,255,102),
        Colors.rgb(178,255,102),
        Colors.rgb(102,255,102),
        Colors.rgb(102,255,178),
        Colors.rgb(102,255,255),
        Colors.rgb(102,178,255),
        Colors.rgb(102,102,255),
        Colors.rgb(178,102,255),
        Colors.rgb(255,102,255),
        Colors.rgb(255,102,178),
        Colors.rgb(192,192,192),
        //
        Colors.rgb(255,153,153),
        Colors.rgb(255,204,153),
        Colors.rgb(255,255,153),
        Colors.rgb(204,255,153),
        Colors.rgb(153,255,153),
        Colors.rgb(153,255,204),
        Colors.rgb(153,255,255),
        Colors.rgb(153,204,255),
        Colors.rgb(153,153,255),
        Colors.rgb(204,153,255),
        Colors.rgb(255,153,255),
        Colors.rgb(255,153,204),
        Colors.rgb(224,224,224),
        //
        Colors.rgb(255,204,204),
        Colors.rgb(255,229,204),
        Colors.rgb(255,255,204),
        Colors.rgb(229,255,204),
        Colors.rgb(204,255,204),
        Colors.rgb(204,255,229),
        Colors.rgb(204,255,255),
        Colors.rgb(204,229,255),
        Colors.rgb(204,204,255),
        Colors.rgb(229,204,255),
        Colors.rgb(255,204,255),
        Colors.rgb(255,204,229),
        Colors.rgb(224,224,224),
    ];
    Rectangle {
        border_width: 1px;
        border_color: Colors.black;
        for color[index] in palette: ColorButton {
            x: color_size * mod(index, colors_per_row);
            y: color_size * floor(index / colors_per_row);
            width: color_size;
            color: color;
            selected: index == selected_color_index;
            select => {
                selected_color_index = index;
                // debug(Math.mod(selected_color_index, colors_per_row)); // X pos
                // debug(Math.floor(selected_color_index / colors_per_row)); // Y pos
                return selected(Math.mod(selected_color_index, colors_per_row) == colors_per_row - 1 ? Colors.rgb(255 / (palette.length / colors_per_row - 1) * Math.floor(selected_color_index / colors_per_row),0,0) : selected_color);
            }
        }
    }
}