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

import { ListView } from "std-widgets.slint";
import { Theme } from "../theme.slint";
import { Icons } from "../icons.slint";
import { MessageItem, MessageKind, ReactionItem } from "../types.slint";
import { Icon } from "icon.slint";
import { Avatar } from "avatar.slint";
import { ToolButton } from "tool-button.slint";

component ReactionChip inherits Rectangle {
    in property <ReactionItem> r;
    callback clicked();

    height: 24px;
    width: label.preferred-width + 20px;
    border-radius: 8px;
    border-width: 1px;
    border-color: r.mine ? Theme.accent : Theme.sidebar-bg;
    background: r.mine ? Theme.accent.with-alpha(0.22) : Theme.sidebar-bg;

    label := Text {
        text: "\{r.key} \{r.count}";
        font-size: 13px;
        color: r.mine ? Theme.text-header : Theme.text-muted;
        horizontal-alignment: center;
        vertical-alignment: center;
    }

    TouchArea {
        mouse-cursor: pointer;
        clicked => {
            root.clicked();
        }
    }
}

// Floating toolbar shown on message hover (react / reply / edit / delete).
component HoverBar inherits Rectangle {
    in property <bool> own;
    callback react();
    callback reply();
    callback edit();
    callback delete();

    height: 32px;
    width: (own ? 4 : 2) * 32px + 8px;
    background: Theme.chat-bg;
    border-radius: 6px;
    border-width: 1px;
    border-color: Theme.divider;

    HorizontalLayout {
        padding: 2px;
        spacing: 0px;
        ToolButton {
            glyph: Icons.smile;
            clicked => {
                root.react();
            }
        }

        ToolButton {
            glyph: Icons.reply;
            clicked => {
                root.reply();
            }
        }

        if root.own: ToolButton {
            glyph: Icons.edit;
            clicked => {
                root.edit();
            }
        }

        if root.own: ToolButton {
            glyph: Icons.trash;
            tint: Theme.danger;
            clicked => {
                root.delete();
            }
        }
    }
}

component ChatMessage inherits Rectangle {
    in property <MessageItem> m;
    callback reply();
    callback edit();
    callback delete();
    callback react(string);

    background: hover.has-hover ? Theme.message-hover-bg : transparent;

    // The TouchArea *wraps* the content so hover stays true while the pointer
    // is over children (text, chips, the toolbar).
    hover := TouchArea {
        VerticalLayout {
            padding-top: root.m.show-header ? 14px : 1px;
            padding-bottom: 2px;
            spacing: 2px;

            if root.m.has-reply: Rectangle {
                height: 20px;
                Text {
                    x: Theme.gutter;
                    width: parent.width - Theme.gutter - 16px;
                    height: parent.height;
                    text: "↳ \{root.m.reply-sender}  \{root.m.reply-body}";
                    color: Theme.text-muted;
                    font-size: 13px;
                    vertical-alignment: center;
                    overflow: elide;
                }
            }

            HorizontalLayout {
                padding-left: 16px;
                padding-right: 16px;
                spacing: 16px;

                // Gutter: avatar on the first message of a group, hover-time otherwise.
                Rectangle {
                    width: 40px;
                    if root.m.show-header: Avatar {
                        initial: root.m.initial;
                        tint: root.m.color;
                        diameter: 40px;
                        y: 2px;
                    }
                    if !root.m.show-header: Text {
                        visible: hover.has-hover;
                        text: root.m.short-time;
                        color: Theme.text-faint;
                        font-size: 10px;
                        horizontal-alignment: center;
                        y: 4px;
                    }
                }

                VerticalLayout {
                    spacing: 2px;

                    if root.m.show-header: HorizontalLayout {
                        height: 20px;
                        spacing: 8px;
                        alignment: start;
                        Text {
                            text: root.m.sender;
                            color: root.m.color.brighter(0.6);
                            font-size: 15px;
                            font-weight: 600;
                            vertical-alignment: center;
                        }

                        Text {
                            text: root.m.time;
                            color: Theme.text-faint;
                            font-size: 12px;
                            vertical-alignment: center;
                        }
                    }

                    // Read-only TextInput rather than Text: lets people select + copy.
                    TextInput {
                        text: root.m.body;
                        read-only: true;
                        single-line: false;
                        wrap: word-wrap;
                        color: root.m.pending ? Theme.text-muted : Theme.text-normal;
                        font-size: 15px;
                        selection-background-color: Theme.accent;
                    }

                    if root.m.edited: Text {
                        text: "(edited)";
                        color: Theme.text-faint;
                        font-size: 11px;
                    }

                    if root.m.reactions.length > 0: HorizontalLayout {
                        height: 28px;
                        padding-top: 4px;
                        spacing: 4px;
                        alignment: start;
                        for r in root.m.reactions: ReactionChip {
                            r: r;
                            clicked => {
                                root.react(r.key);
                            }
                        }
                    }
                }
            }
        }

        // Absolutely positioned => excluded from the row's height calculation.
        if hover.has-hover && !root.m.pending: HoverBar {
            own: root.m.own;
            x: parent.width - self.width - 16px;
            y: -14px;
            react => {
                root.react("👍");
            }
            reply => {
                root.reply();
            }
            edit => {
                root.edit();
            }
            delete => {
                root.delete();
            }
        }
    }
}

component DateDivider inherits Rectangle {
    in property <string> text;
    height: 40px;

    Rectangle {
        x: 16px;
        width: parent.width - 32px;
        y: parent.height / 2;
        height: 1px;
        background: Theme.divider;
    }

    Rectangle {
        width: label.preferred-width + 16px;
        height: 18px;
        x: (parent.width - self.width) / 2;
        y: (parent.height - self.height) / 2;
        background: Theme.chat-bg;
        label := Text {
            text: root.text;
            color: Theme.text-muted;
            font-size: 12px;
            font-weight: 600;
            horizontal-alignment: center;
            vertical-alignment: center;
        }
    }
}

component NoticeRow inherits Rectangle {
    in property <string> text;
    height: 28px;
    Text {
        x: Theme.gutter;
        width: parent.width - Theme.gutter - 16px;
        height: parent.height;
        text: root.text;
        color: Theme.text-faint;
        font-size: 13px;
        vertical-alignment: center;
        overflow: elide;
    }
}

component RoomStart inherits Rectangle {
    in property <string> room-name;

    VerticalLayout {
        padding: 16px;
        padding-top: 32px;
        spacing: 6px;
        Text {
            text: "Welcome to #\{root.room-name}!";
            color: Theme.text-header;
            font-size: 28px;
            font-weight: 700;
            wrap: word-wrap;
        }

        Text {
            text: "This is the start of the #\{root.room-name} channel.";
            color: Theme.text-muted;
            font-size: 15px;
            wrap: word-wrap;
        }
    }
}

component RowSwitch inherits Rectangle {
    in property <MessageItem> m;
    in property <string> room-name;
    callback reply();
    callback edit();
    callback delete();
    callback react(string);

    VerticalLayout {
        if root.m.kind == MessageKind.message: ChatMessage {
            m: root.m;
            reply => {
                root.reply();
            }
            edit => {
                root.edit();
            }
            delete => {
                root.delete();
            }
            react(key) => {
                root.react(key);
            }
        }
        if root.m.kind == MessageKind.date-divider: DateDivider {
            text: root.m.body;
        }
        if root.m.kind == MessageKind.notice: NoticeRow {
            text: root.m.body;
        }
        if root.m.kind == MessageKind.start-of-room: RoomStart {
            room-name: root.room-name;
        }
    }
}

export component MessageList inherits Rectangle {
    in property <[MessageItem]> messages;
    in property <string> room-name;
    in property <bool> loading-older;
    in property <int> room-nonce; // bumped by Rust whenever a different room is opened
    callback reply(string, string); // id, sender
    callback edit(string, string); // id, body
    callback delete(string);
    callback react(string, string); // id, key
    callback load-older();

    // "Stick to bottom": follow new messages unless the user scrolled up.
    property <bool> stick: true;
    property <length> last-height: 0px;
    pure function bottom-y(h: length, v: length) -> length {
        return min(0px, v - h);
    }

    changed room-nonce => {
        root.stick = true;
    }

    background: Theme.chat-bg;

    list := ListView {
        height: parent.height - 8px; // small gap above the composer
        changed content-height => {
            if (root.stick) {
                self.content-y = bottom-y(self.content-height, self.visible-height);
            } else if (self.content-y > -40px && root.last-height > 0px) {
                // Older messages were prepended: keep what the user was reading in place.
                self.content-y = self.content-y - (self.content-height - root.last-height);
            }
            root.last-height = self.content-height;
        }
        changed content-y => {
            root.stick = self.content-y <= bottom-y(self.content-height, self.visible-height) + 24px;
            if (self.content-y > -24px && self.content-height > self.visible-height && !root.loading-older) {
                root.load-older();
            }
        }

        for m in root.messages: RowSwitch {
            m: m;
            room-name: root.room-name;
            reply => {
                root.reply(m.id, m.sender);
            }
            edit => {
                root.edit(m.id, m.body);
            }
            delete => {
                root.delete(m.id);
            }
            react(key) => {
                root.react(m.id, key);
            }
        }
    }

    if root.loading-older: Rectangle {
        y: 8px;
        width: 140px;
        height: 24px;
        x: (parent.width - self.width) / 2;
        border-radius: 12px;
        background: Theme.popup-bg;
        Text {
            text: "Loading history…";
            color: Theme.text-muted;
            font-size: 12px;
            horizontal-alignment: center;
            vertical-alignment: center;
        }
    }
}