// 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 { FluentFontSettings, FluentPalette } from "styling.slint";
import { ScrollView } from "scrollview.slint";

export component TextEdit {
    in property <TextWrap> wrap <=> i-text-input.wrap;
    in property <TextHorizontalAlignment> horizontal-alignment <=> i-text-input.horizontal-alignment;
    in property <bool> read-only <=> i-text-input.read-only;
    in property <length> font-size <=> i-text-input.font-size;
    in property <bool> enabled <=> i-text-input.enabled;
    in-out property <bool> has-focus: i-text-input.has-focus;
    out property <length> visible-width <=> i-scroll-view.visible-width;
    out property <length> visible-height <=> i-scroll-view.visible-height;
    in-out property <string> text <=> i-text-input.text;
    in-out property <length> viewport-x <=> i-scroll-view.viewport-x;
    in-out property <length> viewport-y <=> i-scroll-view.viewport-y;
    in-out property <length> viewport-width <=> i-scroll-view.viewport-width;
    in-out property <length> viewport-height <=> i-scroll-view.viewport-height;

    callback edited(/* text */ string);
    accessible-role: AccessibleRole.text-input;
    accessible-value <=> text;

    public function set-selection-offsets(start: int, end: int) {
        i-text-input.set-selection-offsets(start, end);
    }

    public function select-all() {
        i-text-input.select-all();
    }

    public function clear-selection() {
        i-text-input.clear-selection();
    }

    public function cut() {
        i-text-input.cut();
    }

    public function copy() {
        i-text-input.copy();
    }

    public function paste() {
        i-text-input.paste();
    }

    forward-focus: i-text-input;
    horizontal-stretch: 1;
    vertical-stretch: 1;

    states [
        disabled when !root.enabled : {
            i-background.background: FluentPalette.control-disabled;
            i-background.border-color: FluentPalette.border;
            i-text-input.color: FluentPalette.text-disabled;
            i-text-input.selection-foreground-color: FluentPalette.text-accent-foreground-disabled;
        }
        focused when root.has-focus : {
            i-background.background: FluentPalette.control-input-active;
            i-background.border-color: FluentPalette.border;
            i-focus-border.background: FluentPalette.accent-background;
        }
    ]

    i-background := Rectangle {
        width: 100%;
        height: 100%;
        border-radius: 4px;
        background: FluentPalette.control-background;
        border-width: 1px;
        border-color: FluentPalette.text-control-border;

        i-scroll-view := ScrollView {
            x: 12px;
            y: 12px;
            width: parent.width - 24px;
            height: parent.height - 24px;
            viewport-width: root.wrap == TextWrap.word-wrap ? self.visible-width : max(self.visible-width, i-text-input.preferred-width);
            viewport-height: max(self.visible-height, i-text-input.preferred-height);

            i-text-input := TextInput {
                enabled: true;
                color: FluentPalette.foreground;
                font-size: FluentFontSettings.body.font-size;
                font-weight: FluentFontSettings.body.font-weight;
                selection-background-color: FluentPalette.selection-background;
                selection-foreground-color: FluentPalette.accent-foreground;
                single-line: false;
                wrap: word-wrap;

                edited => {
                    root.edited(self.text);
                }

                cursor-position-changed(cpos) => {
                    if (cpos.x + root.viewport-x < 12px) {
                        root.viewport-x = min(0px, max(parent.visible-width - self.width,  - cpos.x + 12px ));
                    } else if (cpos.x + root.viewport-x > parent.visible-width - 12px) {
                        root.viewport-x = min(0px, max(parent.visible-width - self.width,  parent.visible-width - cpos.x - 12px ));
                    }
                    if (cpos.y + root.viewport-y < 12px) {
                        root.viewport-y = min(0px, max(parent.visible-height - self.height,  - cpos.y + 12px ));
                    } else if (cpos.y + root.viewport-y > parent.visible-height - 12px - 20px) {
                        // FIXME: font-height hardcoded to 20px
                        root.viewport-y = min(0px, max(parent.visible-height - self.height,  parent.visible-height - cpos.y - 12px - 20px));
                    }
                }
            }
        }

        i-focus-border := Rectangle {
            x: parent.border-radius;
            y: parent.height - self.height;
            width: parent.width - 2 * parent.border-radius;
            height: 2px;
        }
    }
}
