// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.2 OR LicenseRef-Slint-commercial

import { CupertinoFontSettings, CupertinoPalette, Icons } from "styling.slint";
import { FocusBorder } from "components.slint";

export component CheckBox {
    in property <string> text;
    in property <bool> enabled <=> i-touch-area.enabled;
    out property <bool> has-focus: i-focus-scope.has-focus;
    in-out property <bool> checked;

    callback toggled;

    private property <brush> background: checked && root.enabled ? CupertinoPalette.accent-background : CupertinoPalette.control-background;
    private property <brush> icon-color: CupertinoPalette.accent-foreground;

    min-height: max(16px, i-layout.min-height);
    accessible-checkable: true;
    accessible-label: root.text;
    accessible-checked <=> root.checked;
    accessible-role: checkbox;
    forward-focus: i-focus-scope;

    states [
        disabled when !root.enabled : {
            opacity: 0.5;
            icon-color: CupertinoPalette.foreground;
        }
        pressed when i-touch-area.pressed : {
            root.background: root.checked ? CupertinoPalette.secondary-accent-background : CupertinoPalette.secondary-control-background;
        }
    ]

    animate background { duration: 150ms; }

    FocusBorder {
        x: (parent.width - self.width) / 2;
        y: (parent.height - self.height) / 2;
        width: parent.width + 6px;
        height: parent.height + 6px;
        border-radius: 8px;
        has-focus: root.has-focus;
    }

    i-layout := HorizontalLayout {
        padding-left: 8px;
        spacing: 6px;

        if (!root.checked) : Rectangle {
            y: (parent.height - self.height) / 2;
            width: 14px;
            height: self.width;
            border-radius: 4px;
            background: root.background;
            clip: true;

            Rectangle {
                background: @radial-gradient(circle, #00000000 0%, #00000000 50%, #0000001A 100%);
            }

            Rectangle {
                width: 100%;
                height: 100%;
                border-radius: parent.border-radius;
                border-width: 0.5px;
                border-color: CupertinoPalette.border;
            }
        }

        if (root.checked) : Rectangle {
            drop-shadow-blur: 3px;
            drop-shadow-color: #00000066;
            drop-shadow-offset-y: 0.5px;
            y: (parent.height - self.height) / 2;
            width: 14px;
            height: self.width;
            border-radius: 4px;
            background: root.background;

            Rectangle {
                drop-shadow-blur: 2px;
                drop-shadow-color: #00000026;
                drop-shadow-offset-y: 1px;
                border-radius: parent.border-radius;
                background: root.background;
            }

            Rectangle {
                drop-shadow-blur: 1px;
                drop-shadow-color: #00000026;
                drop-shadow-offset-y: 0.5px;
                border-radius: parent.border-radius;
                background: root.background;
            }

            Rectangle {
                border-radius: parent.border-radius;
                background: CupertinoPalette.dimmer;
                opacity: 0.17;
            }

            i-icon := Image {
                image-fit: contain;
                visible: root.checked;
                source: Icons.check-mark;
                colorize: root.icon-color;
                width: 12px;

                animate colorize { duration: 150ms; }
            }
        }

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

    i-touch-area := TouchArea {
        clicked => {
            if (root.enabled) {
                root.checked = !root.checked;
                root.toggled();
            }
        }
    }

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

        key-pressed(event) => {
            if (event.text == " " || event.text == "\n") {
                i-touch-area.clicked();
                return accept;
            }
            return reject;
        }
    }
}
