use gtk4::prelude::GtkWindowExt;
use libadwaita::ApplicationWindow;
use libadwaita::prelude::AdwApplicationWindowExt;
use relm4::{
  Component, ComponentController, ComponentParts, ComponentSender, Controller, component,
};

use crate::persist::data_manager::{DataManager, DataManagerError};
use crate::ui::components::media_type_switcher::MediaTypeSwitcher;



pub struct App {
  media_type_switcher: Option<Controller<MediaTypeSwitcher>>,
}

#[derive(Debug)]
pub enum AppCmdOutput {
  DataManagerReady,
  DataManagerFailed(DataManagerError),
}

#[component(pub)]
impl Component for App {
  type Input = ();
  type Output = ();
  type Init = ();
  type CommandOutput = AppCmdOutput;

  view! {
    ApplicationWindow {
      set_title: Some("Zoödex"),

      #[watch]
      set_content: model.media_type_switcher.as_ref().map(Controller::widget),
    }
  }

  fn init(_init: (), root: ApplicationWindow, sender: ComponentSender<App>) -> ComponentParts<App> {
    sender.oneshot_command(async {
      match DataManager::init().await {
        Ok(_) => AppCmdOutput::DataManagerReady,
        Err(error) => AppCmdOutput::DataManagerFailed(error),
      }
    });

    let model = App {
      media_type_switcher: None,
    };
    let widgets = view_output!();
    ComponentParts { model, widgets }
  }

  fn update_cmd(
    &mut self,
    message: AppCmdOutput,
    _sender: ComponentSender<App>,
    _root: &ApplicationWindow,
  ) {
    match message {
      AppCmdOutput::DataManagerReady => {
        // Only launch child component after data manager is ready.
        self.media_type_switcher = Some(MediaTypeSwitcher::builder().launch(()).detach());
      }
      AppCmdOutput::DataManagerFailed(error) => {
        // TODO: Show error in GUI.
        println!("Error occurred in data manager initialization: {:?}", error);
      }
    }
  }
}