pub mod editing;

use rfd::FileHandle;
use rfd::AsyncFileDialog;
use crate::load_song::load_song;
use iced::Command;
use crate::app::Message;

pub use editing::Editing;

// We allow a large enum variant here because this is only used in one place, so it's okay
// to reserve the extra stack space for when FilePicker becomes Editing
#[allow(clippy::large_enum_variant)]
pub enum Model {
	FilePicker { tick: usize },
	Editing(Editing),
}

const MAX_TICKS: usize = 900;

impl Model {
	pub const DEFAULT: Self = Self::FilePicker { tick: 0 };

	pub fn update(&mut self, message: Message) -> Command<Message> {
		match self {
			Self::FilePicker { tick } => {
				match message {
					Message::Tick => {
						*tick = (*tick + 1) % MAX_TICKS;
						Command::none()
					},
					Message::FileOpened(path) => {
						println!("File opened! {}", path.display());
						match Editing::new(&path) {
							Ok((editing, cmd)) => {
								*self = Self::Editing(editing);
								cmd
							},
							Err(e) => {
								eprintln!("yikeys!  Problem opening doodad: {}", e);
								//TODO!  Report the error on the file loader
								Command::none()
							}
						}
					},
					Message::PromptForFile => {
						let show_dialog = AsyncFileDialog::new()
							.add_filter("Song Files", &["mp3", "flac", "ogg", "opus", "wav", "mkv"])
							.set_title("Select a song")
							.pick_file();

						let to_message = |handle: Option<FileHandle>| handle.map_or(
							Message::Null,
							|h| Message::FileOpened(h.path().to_owned()),
						);

						Command::perform(show_dialog, to_message)
					},
					_ => { Command::none() }
				}
			},
			Self::Editing(model) => {
				model.update(message)
			},
		}
	}
}