use std::cell::RefCell;

use gtk::{glib, prelude::*, subclass::prelude::*};

use crate::playlist_item::PlaylistItem;

mod imp {
    use super::*;

    #[derive(Debug, Default, gtk::CompositeTemplate)]
    #[template(file = "data/ui/playlist_tile.blp")]
    pub struct PlaylistTile {
        #[template_child]
        pub playing_icon: TemplateChild<gtk::Image>,
        #[template_child]
        pub composers_label: TemplateChild<gtk::Label>,
        #[template_child]
        pub work_label: TemplateChild<gtk::Label>,
        #[template_child]
        pub performances_label: TemplateChild<gtk::Label>,
        #[template_child]
        pub part_title_label: TemplateChild<gtk::Label>,

        pub binding: RefCell<Option<glib::Binding>>,
    }

    #[glib::object_subclass]
    impl ObjectSubclass for PlaylistTile {
        const NAME: &'static str = "MusicusPlaylistTile";
        type Type = super::PlaylistTile;
        type ParentType = gtk::Box;

        fn class_init(klass: &mut Self::Class) {
            klass.bind_template();
        }

        fn instance_init(obj: &glib::subclass::InitializingObject<Self>) {
            obj.init_template();
        }
    }

    impl ObjectImpl for PlaylistTile {}
    impl WidgetImpl for PlaylistTile {}
    impl BoxImpl for PlaylistTile {}
}

glib::wrapper! {
    pub struct PlaylistTile(ObjectSubclass<imp::PlaylistTile>)
        @extends gtk::Widget, gtk::Box;
}

impl PlaylistTile {
    pub fn new() -> Self {
        glib::Object::new()
    }

    pub fn set_item(&self, item: Option<&PlaylistItem>) {
        let imp = self.imp();

        if let Some(binding) = &*imp.binding.borrow() {
            binding.unbind();
        }

        if let Some(item) = item {
            if item.is_title() {
                if let Some(composers) = item.composers() {
                    imp.composers_label.set_label(&composers);
                    imp.composers_label.set_visible(true);
                    imp.work_label.set_margin_top(3);
                }

                imp.work_label.set_label(&item.work());
                imp.work_label.set_visible(true);

                if let Some(performances) = item.performers() {
                    imp.performances_label.set_label(&performances);
                    imp.performances_label.set_visible(true);
                    imp.work_label.set_margin_bottom(6);
                }
            }

            if let Some(part_title) = item.part_title() {
                imp.part_title_label.set_label(&part_title);
                imp.part_title_label.set_visible(true);
            } else {
                imp.obj().set_margin_bottom(24);
            }

            imp.binding.replace(Some(
                item.bind_property("is-playing", &imp.playing_icon.get(), "visible")
                    .sync_create()
                    .build(),
            ));
        }
    }
}