/*
 * FeedDetail.vala
 * 
 * Widget for displaying feed details
 */

namespace RSSuper {

    using Gtk;

    /**
     * FeedDetail - Displays details of a selected feed
     */
    public class FeedDetail : WidgetBase {
        private FeedViewModel view_model;
        private Label title_label;
        private Label author_label;
        private Label published_label;
        private Label content_label;
        private ScrolledWindow scrolled_window;
        private Box content_box;
        private Button mark_read_button;
        private Button star_button;

        public FeedDetail(FeedViewModel view_model) {
            this.view_model = view_model;
            
            scrolled_window = new ScrolledWindow();
            scrolled_window.set_hexpand(true);
            scrolled_window.set_vexpand(true);
            
            content_box = new Box(Orientation.VERTICAL, 12);
            content_box.set_margin(20);
            
            title_label = new Label(null);
            title_label.set_wrap(true);
            title_label.set_xalign(0);
            title_label.add_css_class("title");
            content_box.append(title_label);
            
            var metadata_box = new Box(Orientation.HORIZONTAL, 12);
            author_label = new Label(null);
            author_label.add_css_class("dim-label");
            metadata_box.append(author_label);
            
            published_label = new Label(null);
            published_label.add_css_class("dim-label");
            metadata_box.append(published_label);
            
            content_box.append(metadata_box);
            
            content_label = new Label(null);
            content_label.set_wrap(true);
            content_label.set_xalign(0);
            content_label.set_max_width_chars(80);
            content_box.append(content_label);
            
            mark_read_button = new Button.with_label("Mark as Read");
            mark_read_button.clicked += on_mark_read;
            content_box.append(mark_read_button);
            
            star_button = new Button.with_label("Star");
            star_button.clicked += on_star;
            content_box.append(star_button);
            
            scrolled_window.set_child(content_box);
            append(scrolled_window);
            
            view_model.feed_state.state_changed += on_state_changed;
        }

        public override void initialize() {
            // Initialize with default state
            update_from_state();
        }

        public void set_feed_item(FeedItem item) {
            title_label.set_text(item.title);
            author_label.set_text(item.author ?? "Unknown");
            published_label.set_text(item.published.to_string());
            content_label.set_text(item.content);
            
            mark_read_button.set_visible(!item.read);
            mark_read_button.set_label(item.read ? "Mark as Unread" : "Mark as Read");
            
            star_button.set_label(item.starred ? "Unstar" : "Star");
        }

        private void on_state_changed() {
            update_from_state();
        }

        protected override void update_from_state() {
            var state = view_model.get_feed_state();
            
            if (state.is_error()) {
                content_box.set_sensitive(false);
                content_label.set_text($"Error: {state.get_message()}");
            } else {
                content_box.set_sensitive(true);
            }
        }

        private void on_mark_read() {
            // Get selected item from FeedList and mark as read
            // This requires integrating with FeedList selection
            // For now, mark current item as read
            var state = view_model.get_feed_state();
            if (state.is_success()) {
                var items = state.get_data() as FeedItem[];
                foreach (var item in items) {
                    view_model.mark_as_read(item.id, !item.read);
                }
            }
        }

        private void on_star() {
            var state = view_model.get_feed_state();
            if (state.is_success()) {
                var items = state.get_data() as FeedItem[];
                foreach (var item in items) {
                    view_model.mark_as_starred(item.id, !item.starred);
                }
            }
        }
    }
}