import { UiRadius } from "ui_radius.slint";
import { ScrollView } from "std-widgets.slint";
import { IconButton, FontAwesomeIcons } from "common.slint";
import { SettingsDialog, SettingsButton } from "settings_controls.slint";
import { WorkbenchStyle } from "workbench_controls.slint";
import "../assets/fonts/message_spacing.ttf";

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> read-all: "Mark all as 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. Please try again.";
    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 SettingsDialog {
    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-revision;
    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 read-all;
    private property <string> notice-text: root.delete-failed ? MessageStrings.delete-error
        : root.read-save-failed ? MessageStrings.read-save-error : "";
    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;
        }
    }
    title: MessageStrings.messages;
    close-label: MessageStrings.close;
    badge-count: root.unread-count;
    badge-label: MessageStrings.unread + " " + root.unread-count;
    header-status: root.loading ? MessageStrings.loading : "";
    action-text: MessageStrings.read-all;
    action-enabled: root.loaded && !root.loading && root.unread-count > 0;
    action => { root.read-all(); }
    notice := Rectangle {
        x: 24px; y: root.content-top; width: parent.width - 48px;
        height: root.notice-text == "" ? 0px : notice-label.preferred-height + 20px;
        visible: root.notice-text != "";
        border-radius: UiRadius.control; background: #fef2f2;
        notice-label := Text {
            x: 10px; y: 10px; width: parent.width - 20px;
            height: self.preferred-height;
            text: root.notice-text; font-size: 12px; wrap: word-wrap; color: #b3261e;
        }
    }
    message-content := Rectangle {
        x: 24px; y: root.content-top + (root.notice-text == "" ? 0px : notice.height + 12px);
        width: parent.width - 48px; height: parent.height - self.y - 24px;
        background: WorkbenchStyle.surface;
        border-radius: UiRadius.surface; border-width: 1px; border-color: WorkbenchStyle.border;
        if root.items.length > 0 || root.selected-id != "": Rectangle {
            x: 1px; y: 1px; width: content-divider.x - 1px; height: parent.height - 2px;
            background: WorkbenchStyle.field-surface;
            border-top-left-radius: UiRadius.surface - 1px;
            border-bottom-left-radius: UiRadius.surface - 1px;
        }
        announcement-list := Rectangle {
            x: 8px; y: 8px; width: 176px; height: parent.height - 16px;
            announcements-scroll := ScrollView {
                width: parent.width; height: parent.height;
                viewport-width: self.width - 10px;
                viewport-height: announcement-entries.preferred-height;
                horizontal-scrollbar-policy: always-off;
                vertical-scrollbar-policy: as-needed;
                announcement-entries := VerticalLayout {
                    width: announcements-scroll.viewport-width; spacing: 10px; padding: 0px;
                    alignment: start;
                    for item in root.items: Rectangle {
                        height: 64px;
                        background: root.selected-id == item.id ? #e8efff
                            : entry-touch.pressed ? WorkbenchStyle.pressed-surface
                            : entry-touch.has-hover ? WorkbenchStyle.hover-surface : WorkbenchStyle.surface;
                        border-radius: UiRadius.control;
                        border-width: 1px;
                        border-color: root.selected-id == item.id ? #b5c9f5 : WorkbenchStyle.border;
                        Text {
                            x: 10px; y: 9px; width: parent.width - 30px; height: 20px;
                            text: item.title; overflow: elide; font-size: 13px;
                            font-weight: item.read ? 400 : 600;
                            color: root.selected-id == item.id ? WorkbenchStyle.accent : WorkbenchStyle.text;
                            vertical-alignment: center;
                        }
                        if !item.read: Rectangle {
                            x: parent.width - 15px; y: 16px; width: 6px; height: 6px;
                            border-radius: 3px; background: WorkbenchStyle.accent;
                            accessible-role: none;
                        }
                        Text {
                            x: 10px; y: 35px; width: parent.width - 20px; height: 18px;
                            text: item.date; color: WorkbenchStyle.muted; font-size: 11px;
                            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); }
                        }
                    }
                }
            }
        }
        if root.items.length == 0 && root.total == 0 && root.loaded && root.connected && !root.loading && !root.failed: Text {
            x: 24px; width: parent.width - 48px; height: parent.height;
            text: MessageStrings.empty; wrap: word-wrap;
            color: WorkbenchStyle.muted; font-size: 13px;
            horizontal-alignment: center; vertical-alignment: center;
        }
        content-divider := Rectangle {
            x: announcement-list.x + announcement-list.width + 8px;
            y: 1px; width: 1px; height: parent.height - 2px;
            background: WorkbenchStyle.separator;
            visible: root.items.length > 0 || root.selected-id != "";
            accessible-role: none;
        }
        announcement-details := Rectangle {
            x: content-divider.x + 17px; y: 16px;
            width: parent.width - self.x - 16px; height: parent.height - 32px;
            clip: true;
            if root.selected-id == "" && root.items.length > 0: Text {
                width: parent.width; height: parent.height;
                text: MessageStrings.select-message; color: WorkbenchStyle.muted; font-size: 13px;
                wrap: word-wrap; horizontal-alignment: center; vertical-alignment: center;
            }
            if root.selected-id != "": details-scroll := ScrollView {
                width: parent.width; height: parent.height;
                viewport-width: self.width - 12px;
                viewport-height: details-content.preferred-height;
                horizontal-scrollbar-policy: always-off;
                vertical-scrollbar-policy: as-needed;
                details-content := VerticalLayout {
                    width: details-scroll.viewport-width; padding: 0px; padding-bottom: 4px;
                    spacing: 14px; alignment: start;
                    Rectangle {
                        height: max(28px, selected-heading.preferred-height);
                        selected-heading := VerticalLayout {
                            x: 0px; y: 0px;
                            width: parent.width - 40px; height: self.preferred-height;
                            padding: 0px; spacing: 6px;
                            Text {
                                vertical-stretch: 0; text: root.selected-title; wrap: word-wrap;
                                font-size: 16px; font-weight: 600; color: WorkbenchStyle.text;
                            }
                            Text {
                                vertical-stretch: 0; text: root.selected-date;
                                accessible-label: root.selected-date + " · " + (root.selected-read ? MessageStrings.read : MessageStrings.unread);
                                color: WorkbenchStyle.muted; font-size: 11px; wrap: word-wrap;
                            }
                        }
                        IconButton {
                            x: parent.width - self.width; y: 0px; width: 28px; height: 28px;
                            icon: FontAwesomeIcons.trash-can; icon-size: 12px;
                            icon-color: WorkbenchStyle.muted; danger: true;
                            accessible-role: button;
                            accessible-label: MessageStrings.delete-message + " " + root.selected-title;
                            accessible-action-default => { root.request-delete(root.selected-id, root.selected-revision); }
                            clicked => { root.request-delete(root.selected-id, root.selected-revision); }
                        }
                    }
                    Rectangle { height: 1px; background: WorkbenchStyle.separator; }
                    StyledText {
                        vertical-stretch: 0;
                        text: root.selected-body;
                        default-color: WorkbenchStyle.text; default-font-size: 13px;
                        // Metrics-only family provides 1.5em line height; visible
                        // glyphs continue to use Slint's normal font fallback.
                        default-font-family: "CrossDesk Message Spacing";
                        link-color: WorkbenchStyle.accent;
                        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: #15223850; border-radius: root.border-radius; z: 30;
        TouchArea { clicked => { confirmation-keys.focus(); } }
        SettingsDialog {
            x: (parent.width - self.width) / 2;
            y: (parent.height - self.height) / 2;
            width: min(360px, root.width - 48px);
            height: self.content-top + confirmation-content.preferred-height + 24px;
            title: MessageStrings.delete-title;
            close-label: MessageStrings.cancel;
            close => { root.pending-delete-id = ""; }
            confirmation-content := VerticalLayout {
                x: 24px; y: parent.content-top; width: parent.width - 48px;
                height: self.preferred-height;
                padding: 0px; spacing: 24px;
                Text { text: MessageStrings.delete-confirmation; font-size: 13px; color: WorkbenchStyle.text; wrap: word-wrap; }
                HorizontalLayout {
                    alignment: end; spacing: 8px;
                    cancel-delete-button := SettingsButton {
                        width: 88px; 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 := SettingsButton {
                        width: 88px; 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 = "";
                        }
                    }
                }
            }
        }
    }
}