// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.0 OR LicenseRef-Slint-commercial

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

component SpinBoxButton inherits Rectangle {
    callback clicked <=> i-touch-area.clicked;

    in-out property <bool> pressed: self.enabled && i-touch-area.pressed;
    in-out property <bool> enabled <=> i-touch-area.enabled;
    in-out property <float> icon-opacity: 1;
    in-out property <brush> icon-fill: Palette.on-primary;

    width: root.height;

    i-background := Rectangle {
        width: 100%;
        height: 100%;
        border-radius: max(self.width, self.height) / 2;
        background: Palette.primary;
    }

    i-state-layer := Rectangle {
        x: 0;
        y: 0;
        opacity: 0;
        width: i-background.width;
        height: i-background.height;
        border-radius: i-background.border-radius;
        background: Palette.on-primary;

        animate opacity { duration: 250ms; easing: ease; }
     }

    Rectangle {
        width: 100%;
        height: 100%;

        @children
    }

    i-touch-area := TouchArea { }

    states [
        disabled when !root.enabled : {
            i-background.background: Palette.on-surface;
            i-background.opacity: 0.12;
            icon-opacity: 0.38;
            icon-fill: Palette.on-surface;
        }
        pressed when i-touch-area.pressed : {
            i-state-layer.opacity: 0.12;
        }
        hover when i-touch-area.has-hover : {
            i-state-layer.opacity: 0.08;
        }
    ]
}

// Increment and decrement a value in the given range.
export component SpinBox {
    in property <int> minimum;
    in property <int> maximum: 100;
    in property <bool> enabled <=> i-focus-scope.enabled;
    out property <bool> has-focus <=> i-focus-scope.has-focus;
    in-out property <int> value;

    forward-focus: i-focus-scope;
    horizontal-stretch: 1;
    vertical-stretch: 0;
    min-height: max(56px, i-layout.min-height);

    accessible-role: spinbox;
    accessible-value: root.value;
    accessible-value-minimum: root.minimum;
    accessible-value-maximum: root.maximum;
    accessible-value-step: (root.maximum - root.minimum) / 100;

    i-focus-scope := FocusScope {
        key-pressed(event) => {
            if (root.enabled && event.text == Key.UpArrow && root.value < root.maximum) {
                root.value += 1;
                accept
            } else if (root.enabled && event.text == Key.DownArrow && root.value > root.minimum) {
                root.value -= 1;
                accept
            } else {
                reject
            }
        }
    }

    i-background := Rectangle {
        width: 100%;
        height: 100%;
        border-radius: 4px;
        border-width: 1px;
        border-color: Palette.outline;
    }

    i-layout := HorizontalLayout {
        padding-top: 8px;
        padding-bottom: 8px;
        padding-left: 16px;
        padding-right: 12px;
        spacing: 16px;

        i-text := Text {
            text: root.value;
            height: 100%;
            color: Palette.on-surface;
            vertical-alignment: center;
            // FIXME after Roboto font can be loaded
            //font-family: Typography.body-large.font;
            font-size: Typography.body-large.font-size;
            font-weight: Typography.body-large.font-weight;
        }

        VerticalLayout {
            spacing: 4px;

            SpinBoxButton {
                enabled: root.enabled;

                Image {
                    x: (parent.width - self.width) / 2;
                    y: (parent.height - self.height) / 2;
                    source: Icons.arrow-drop-up;
                    opacity: parent.icon-opacity;
                    colorize: parent.icon-fill;
                }

                clicked => {
                    if (root.value < root.maximum) {
                        root.value += 1;
                    }

                    root.focus();
                }
            }

            SpinBoxButton {
                enabled: root.enabled;

                Image {
                    x: (parent.width - self.width) / 2;
                    y: (parent.height - self.height) / 2;
                    source: Icons.arrow-drop-down;
                    opacity: parent.icon-opacity;
                    colorize: parent.icon-fill;
                }

                clicked => {
                    if (root.value > root.minimum) {
                        root.value -= 1;
                    }

                    root.focus();
                }
            }
        }
    }

    states [
        disabled when !root.enabled : {
            i-background.border-color: Palette.on-surface;
            i-background.opacity: 0.38;
            i-text.opacity: 0.38;
        }
        focused when root.has-focus : {
            i-background.border-width: 2px;
            i-background.border-color: Palette.primary;
            i-text.color: Palette.primary;
        }
    ]
}