/// TEMPORARY AI GENERATED FRONTEND \\\
///   NOT TO BE USED IN PRODUCTION  \\\

import { Theme } from "../theme.slint";
import { Icons } from "../icons.slint";
import { Icon } from "icon.slint";
import { ToolButton } from "tool-button.slint";

// Message box. Enter sends, Shift+Enter inserts a newline (same as Discord).
// The component is deliberately stateless about *what* is being sent: the
// parent owns the reply/edit state and just tells us what banner to show.
export component Composer inherits Rectangle {
    in property <string> placeholder;
    in property <string> banner;      // "Replying to Alice" / "Editing message"; "" hides it
    in property <bool> editing;
    in property <string> typing-text; // "Bob is typing…"
    callback submit(string);
    callback cancel-banner();
    callback clear-text();
    callback typing();
    callback attach();
    // Parent -> composer requests, as properties so the composer can live inside an `if`.
    in property <string> text-to-set;
    in property <int> text-nonce; // bump to replace the input text with `text-to-set` (and focus)
    in property <int> focus-nonce; // bump to just focus the input
    changed text-nonce => {
        input.text = root.text-to-set;
        input.focus();
    }
    changed focus-nonce => {
        input.focus();
    }

    // Grows with content up to ~8 lines, like Discord.
    property <length> input-height: min(max(input.preferred-height, 24px), 180px);

    height: (root.banner != "" ? 32px : 0px) + input-height + 24px + 24px;
    background: Theme.chat-bg;

    // Reply / edit banner sits above the input and shares its rounded top.
    if root.banner != "": Rectangle {
        x: 16px;
        y: 0px;
        width: parent.width - 32px;
        height: 32px + 8px;
        background: Theme.sidebar-bg;
        border-top-left-radius: 8px;
        border-top-right-radius: 8px;

        Text {
            x: 12px;
            width: parent.width - 60px;
            height: 32px;
            text: root.banner;
            color: Theme.text-muted;
            font-size: 13px;
            vertical-alignment: center;
            overflow: elide;
        }

        ToolButton {
            glyph: Icons.close;
            x: parent.width - self.width - 6px;
            y: 2px;
            clicked => {
                root.cancel-banner();
            }
        }
    }

    box := Rectangle {
        x: 16px;
        y: (root.banner != "" ? 32px : 0px);
        width: parent.width - 32px;
        height: root.input-height + 24px;
        background: Theme.input-bg;
        border-radius: root.banner != "" ? 0px : 8px;
        border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px;

        ToolButton {
            glyph: Icons.plus-circle;
            x: 6px;
            y: parent.height - self.height - 10px;
            clicked => {
                root.attach();
            }
        }

        FocusScope {
            x: 44px;
            y: 12px;
            width: parent.width - 44px - 52px;
            height: root.input-height;

            // Intercept Enter before the TextInput turns it into a newline.
            capture-key-pressed(event) => {
                if (event.text == Key.Return && !event.modifiers.shift) {
                    if (input.text != "") {
                        root.submit(input.text);
                        input.text = "";
                    }
                    return accept;
                }
                return reject;
            }

            input := TextInput {
                width: parent.width;
                height: parent.height;
                single-line: false;
                wrap: word-wrap;
                color: Theme.text-normal;
                font-size: 15px;
                selection-background-color: Theme.accent;
                edited => {
                    root.typing();
                }
            }
        }

        if input.text == "": Text {
            x: 44px;
            y: 12px;
            width: parent.width - 100px;
            height: 24px;
            text: root.placeholder;
            color: Theme.text-faint;
            font-size: 15px;
            vertical-alignment: center;
            overflow: elide;
        }

        ToolButton {
            glyph: Icons.smile;
            x: parent.width - self.width - 8px;
            y: parent.height - self.height - 10px;
            // TODO: emoji picker
        }
    }

    // Typing indicator, under the box.
    Text {
        x: 20px;
        y: parent.height - 22px;
        width: parent.width - 40px;
        height: 18px;
        text: root.typing-text;
        color: Theme.text-muted;
        font-size: 12px;
        font-weight: 600;
        vertical-alignment: center;
        overflow: elide;
    }
}