import { ScrollView } from "std-widgets.slint";
import { CompactButton, DialogSurface, IconButton, FontAwesomeIcons, ImGuiFontStyle } from "common.slint";

export struct AnnouncementItem {
    id: string,
    revision: string,
    title: string,
    date: string,
    read: bool,
}

export global MessageStrings {
    in-out property <string> messages: "Messages";
    in-out property <string> unread: "Unread";
    in-out property <string> read: "Read";
    in-out property <string> empty: "No announcements";
    in-out property <string> select-message: "Select an announcement to read";
    in-out property <string> loading: "Loading…";
    in-out property <string> read-save-error: "Unable to save reading status locally. Open the announcement again to retry.";
    in-out property <string> close: "Close";
    in-out property <string> delete-message: "Delete";
    in-out property <string> delete-title: "Delete announcement";
    in-out property <string> delete-confirmation: "Delete this announcement?";
    in-out property <string> delete-error: "Unable to delete this announcement. Please try again.";
    in-out property <string> cancel: "Cancel";
}

export component MessagePanel inherits DialogSurface {
    in property <[AnnouncementItem]> items;
    in property <int> unread-count;
    in property <int> total;
    in property <bool> loading;
    in property <bool> failed;
    in property <bool> read-save-failed;
    in property <bool> delete-failed;
    in property <bool> loaded;
    in property <bool> connected;
    in property <string> selected-id;
    in property <string> selected-title;
    in property <styled-text> selected-body;
    in property <string> selected-date;
    in property <bool> selected-read;
    callback open-message(string, string);
    callback open-link(string);
    callback delete-message(string, string);
    callback load-more;
    callback close;
    private property <string> notice-text: root.delete-failed ? MessageStrings.delete-error
        : root.read-save-failed ? MessageStrings.read-save-error : "";
    private property <length> content-top: title-bar.height + (root.notice-text == "" ? 14px : 50px);
    private property <color> separator-color: #e6e8eb;
    private property <string> pending-delete-id;
    private property <string> pending-delete-revision;
    function request-delete(id: string, revision: string) {
        root.pending-delete-id = id;
        root.pending-delete-revision = revision;
        confirmation-keys.focus();
    }
    confirmation-keys := FocusScope {
        width: 0px; height: 0px;
        key-pressed(event) => {
            if event.text == Key.Escape {
                if root.pending-delete-id != "" { root.pending-delete-id = ""; }
                else { root.close(); }
                return accept;
            }
            return reject;
        }
    }
    background: white;
    border-radius: 7px;
    TouchArea { }
    title-bar := Rectangle {
        x: 0px; y: 0px; width: parent.width; height: 21px;
        background: #d3d3d3; border-radius: 7px;
        Rectangle { y: parent.height - 7px; height: 7px; background: #d3d3d3; }
        message-heading := Text {
            x: 6px; width: parent.width - 100px; height: parent.height;
            text: MessageStrings.messages;
            font-size: ImGuiFontStyle.base; font-weight: 600; color: #202124;
            vertical-alignment: center; overflow: elide;
        }
        if root.unread-count > 0: Rectangle {
            x: message-heading.x + message-heading.preferred-width + 8px;
            y: (parent.height - self.height) / 2; height: 16px;
            width: max(16px, unread-count-label.preferred-width + 8px);
            border-radius: 8px; background: #eaf2ff;
            accessible-role: text;
            accessible-label: MessageStrings.unread + " " + root.unread-count;
            unread-count-label := Text {
                text: "" + root.unread-count; color: #2563eb;
                font-size: ImGuiFontStyle.small; font-weight: 600;
                horizontal-alignment: center; vertical-alignment: center;
                accessible-role: none;
            }
        }
        if root.loading: Text {
            x: parent.width - 150px; width: 110px; height: parent.height;
            text: MessageStrings.loading; color: #61656c; font-size: ImGuiFontStyle.small;
            horizontal-alignment: right; vertical-alignment: center;
        }
        IconButton {
            x: parent.width - 25px; y: 2px; width: 19px; height: parent.height - 4px;
            border-radius: 3px;
            icon: FontAwesomeIcons.xmark; icon-size: ImGuiFontStyle.base;
            icon-color: #202124;
            hover-background: #bfc2c7; pressed-background: #b2b2b2;
            accessible-role: button;
            accessible-label: MessageStrings.close;
            accessible-action-default => { root.close(); }
            clicked => { root.close(); }
        }
    }
    if root.notice-text != "": Rectangle {
        x: 16px; y: title-bar.height + 10px; width: parent.width - 32px; height: 28px;
        border-radius: 4px;
        background: #fef2f2;
        Text {
            x: 8px; width: parent.width - 16px; height: parent.height;
            text: root.notice-text; font-size: ImGuiFontStyle.body; overflow: elide;
            color: #b3261e;
            vertical-alignment: center;
        }
    }
    announcement-list := Rectangle {
        x: 16px; y: root.content-top; width: 168px; height: parent.height - self.y - 16px;
        announcements-scroll := ScrollView {
            width: parent.width; height: parent.height;
            VerticalLayout {
                width: announcements-scroll.width; spacing: 0px; padding: 0px;
                padding-right: 8px;
                alignment: start;
                for item[index] in root.items: Rectangle {
                    height: 54px;
                    background: root.selected-id == item.id ? #eaf2ff : entry-touch.has-hover ? #f0f1f2 : transparent;
                    border-radius: 4px;
                    Text { x: 8px; y: 6px; width: parent.width - 32px; height: 18px; text: item.title; overflow: elide; font-size: ImGuiFontStyle.base; font-weight: item.read ? 400 : 600; color: #202124; vertical-alignment: center; }
                    if !item.read: Rectangle {
                        x: parent.width - 17px; y: 13px; width: 5px; height: 5px;
                        border-radius: 2.5px; background: #2563eb;
                        accessible-role: none;
                    }
                    Text { x: 8px; y: 28px; width: parent.width - 36px; height: 16px; text: item.date; color: #61656c; font-size: ImGuiFontStyle.small; overflow: elide; vertical-alignment: center; }
                    accessible-role: button;
                    accessible-label: item.title + " " + (item.read ? MessageStrings.read : MessageStrings.unread);
                    accessible-action-default => { root.open-message(item.id, item.revision); }
                    entry-touch := TouchArea { mouse-cursor: pointer; clicked => { root.open-message(item.id, item.revision); } }
                    IconButton {
                        x: parent.width - 24px; y: 26px; width: 20px; height: 20px;
                        icon: FontAwesomeIcons.xmark; icon-size: ImGuiFontStyle.small;
                        icon-color: #61656c; danger: true;
                        accessible-role: button;
                        accessible-label: MessageStrings.delete-message + " " + item.title;
                        accessible-action-default => { root.request-delete(item.id, item.revision); }
                        clicked => { root.request-delete(item.id, item.revision); }
                    }
                    if index < root.items.length - 1: Rectangle {
                        x: 8px; y: parent.height - 1px;
                        width: parent.width - 16px; height: 1px;
                        background: root.separator-color;
                        accessible-role: none;
                    }
                }
            }
        }
    }
    if root.items.length == 0 && root.total == 0 && root.loaded && root.connected && !root.loading && !root.failed: Text {
        x: 16px; y: root.content-top; width: parent.width - 32px; height: announcement-list.height;
        text: MessageStrings.empty; wrap: word-wrap;
        color: #61656c; font-size: ImGuiFontStyle.body;
        horizontal-alignment: center; vertical-alignment: center;
    }
    content-divider := Rectangle {
        x: announcement-list.x + announcement-list.width + 12px;
        y: root.content-top; width: 1px; height: announcement-list.height;
        background: root.separator-color;
        visible: root.items.length > 0 || root.selected-id != "";
        accessible-role: none;
    }
    announcement-details := Rectangle {
        x: content-divider.x + content-divider.width + 12px;
        y: root.content-top; width: parent.width - self.x - 16px; height: announcement-list.height;
        if root.selected-id == "" && root.items.length > 0: Text { x: 8px; width: parent.width - 16px; text: MessageStrings.select-message; color: #61656c; font-size: ImGuiFontStyle.body; wrap: word-wrap; horizontal-alignment: center; vertical-alignment: center; }
        if root.selected-id != "": details-scroll := ScrollView {
            width: parent.width; height: parent.height;
            VerticalLayout {
                width: details-scroll.width; padding: 8px; padding-top: 6px; padding-right: 16px;
                spacing: 12px; alignment: start;
                VerticalLayout {
                    vertical-stretch: 0; spacing: 4px;
                    Text { vertical-stretch: 0; min-height: 18px; text: root.selected-title; wrap: word-wrap; font-size: ImGuiFontStyle.base; font-weight: 600; color: #202124; vertical-alignment: center; }
                    Text { vertical-stretch: 0; min-height: 16px; text: root.selected-date; accessible-label: root.selected-date + " · " + (root.selected-read ? MessageStrings.read : MessageStrings.unread); color: #61656c; font-size: ImGuiFontStyle.small; wrap: word-wrap; vertical-alignment: center; }
                }
                Rectangle { height: 1px; background: root.separator-color; }
                StyledText {
                    vertical-stretch: 0;
                    text: root.selected-body;
                    default-color: #202124; default-font-size: ImGuiFontStyle.body;
                    link-color: #2563eb;
                    link-clicked(url) => { root.open-link(url); }
                }
            }
        }
    }
    Timer {
        interval: 100ms;
        running: root.connected && !root.loading && !root.failed
            && root.pending-delete-id == "" && root.items.length > 0
            && root.items.length < root.total && announcements-scroll.viewport-height > 0px
            && announcements-scroll.viewport-height + announcements-scroll.viewport-y <= announcements-scroll.height + 80px;
        triggered => { root.load-more(); }
    }
    if root.pending-delete-id != "": Rectangle {
        background: #00000042; border-radius: root.border-radius; z: 30;
        TouchArea { clicked => { confirmation-keys.focus(); } }
        DialogSurface {
            x: (parent.width - self.width) / 2;
            y: (parent.height - self.height) / 2;
            width: 230px; height: confirmation-content.preferred-height;
            border-radius: root.border-radius;
            TouchArea { clicked => { confirmation-keys.focus(); } }
            confirmation-content := VerticalLayout {
                padding: 16px;
                padding-top: 26px;
                padding-bottom: 26px;
                spacing: 20px;
                Text { text: MessageStrings.delete-confirmation; font-size: ImGuiFontStyle.base; color: #202124; wrap: word-wrap; horizontal-alignment: center; }
                HorizontalLayout {
                    alignment: center; spacing: 8px;
                    cancel-delete-button := CompactButton {
                        width: 72px; text: MessageStrings.cancel;
                        accessible-role: button; accessible-label: MessageStrings.cancel;
                        accessible-action-default => { cancel-delete-button.clicked(); }
                        clicked => { root.pending-delete-id = ""; }
                    }
                    confirm-delete-button := CompactButton {
                        width: 72px; text: MessageStrings.delete-message; primary: true;
                        accessible-role: button; accessible-label: MessageStrings.delete-title;
                        accessible-action-default => { confirm-delete-button.clicked(); }
                        clicked => {
                            root.delete-message(root.pending-delete-id, root.pending-delete-revision);
                            root.pending-delete-id = "";
                        }
                    }
                }
            }
        }
    }
}