// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial

import { Typography, Palette } from "styling.slint";
import { FocusBorder } from "components.slint";

export component Switch {
    private property <color> text-color: Palette.foreground;

    callback toggled;

    in property<bool> enabled: true;
    in property <string> text;
    in-out property <bool> checked: true;
    out property <bool> has-focus: i-focus-scope.has-focus;

    min-width: 26px;
    min-height: 15px;
    vertical-stretch: 0;
    horizontal-stretch: 0;
    accessible-label: root.text;
    accessible-checkable: true;
    accessible-checked <=> root.checked;
    accessible-role: checkbox;
    forward-focus: i-focus-scope;

    i-layout := HorizontalLayout {
        spacing: 12px;

        VerticalLayout {
            alignment: center;

           Rectangle {
                width: 26px;
                height: 15px;

                i-rail := Rectangle {
                    border-radius: 7px;
                    background: Palette.bar-background;

                    Rectangle {
                        border-color: Palette.fake-inner-shadow;
                        border-radius: parent.border-radius;
                        border-width: 1px;
                    }
                }

                i-thumb := Rectangle {
                    x: root.checked ? parent.width - self.width - 1px : 2px;
                    y: (parent.height - self.height) / 2;
                    height: parent.height - 2px;
                    width: self.height;
                    border-radius: self.height / 2;

                    i-thumb-border := Rectangle {
                        x: (parent.width - self.width) / 2;
                        y: (parent.height - self.height) / 2;
                        width: parent.width + 2px;
                        height: self.width;
                        border-radius: parent.border-radius + 1px;
                        border-width: 1px;
                        border-color: Palette.fake-shadow;
                    }

                    i-thumb-background := Rectangle {
                        background: Palette.thumb-background;
                        border-radius: parent.border-radius;
                    }

                    animate background, width { duration: 150ms; easing: linear; }
                }

                animate background, border-color { duration: 150ms; easing: linear; }

                // focus border
                if (root.has-focus && root.enabled) : FocusBorder {
                    border-radius: i-rail.border-radius;
                }
            }
        }

        if (root.text != "") : Text {
            text: root.text;
            color: root.text-color;
            font-size: Typography.body.font-size;
            font-weight: Typography.body.font-weight;
            vertical-alignment: center;
            horizontal-alignment: left;
        }
    }

    i-touch-area := TouchArea {
        enabled <=> root.enabled;

        clicked => {
            root.toggle-checked();
        }
    }

    i-focus-scope := FocusScope {
        x:0;
        width: 0px; // Do not react on clicks
        enabled <=> root.enabled;

        key-pressed(event) => {
            if (event.text == " " || event.text == "\n") {
                 root.toggle-checked();
                 return accept;
            }
            return reject;
        }
    }

    function toggle-checked() {
        if(!root.enabled) {
            return;
        }

        root.checked = !root.checked;
        root.toggled();
    }

    states [
        disabled when !root.enabled : {
            root.opacity: 0.5;
        }
        pressed when i-touch-area.pressed : {
        }
        hover when i-touch-area.has-hover : {
        }
        selected when root.checked : {
            i-rail.background: Palette.primary;
        }
    ]
}