// 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 { CosmicFontSettings, CosmicPalette } from "styling.slint";
import { ScrollView } from "scrollview.slint";

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

    callback edited(/* text */ string);

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

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

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

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

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

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

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

    states [
        disabled when !root.enabled : {
            root.opacity: 0.5;
        }
    ]

    background := Rectangle {
        width: 100%;
        height: 100%;
        border-radius: 8px;
        background: CosmicPalette.control-background;
        border-width: 1px;
        border-color: CosmicPalette.control-divider;

        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, text-input.preferred-width);
            viewport-height: max(self.visible-height, text-input.preferred-height);

            text-input := TextInput {
                enabled: true;
                color: CosmicPalette.foreground;
                font-size: CosmicFontSettings.body.font-size;
                font-weight: CosmicFontSettings.body.font-weight;
                selection-background-color: CosmicPalette.selection-background;
                selection-foreground-color: CosmicPalette.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));
                    }
                }
            }
        }

        if (root.has-focus && root.enabled) : Rectangle {
            width: parent.width + 2px;
            height: parent.height + 2px;
            border-radius: parent.border-radius + 2px;
            border-color: CosmicPalette.state-focus;
            border-width: 1px;
        }
    }
}