// Copyright (c) 2022 Marceline Cramer
// SPDX-License-Identifier: AGPL-3.0-or-later

use serde::{Deserialize, Serialize};

pub use serde;
pub use serde_json;

#[derive(Copy, Clone, Debug, Serialize, Deserialize)]
pub enum PlaybackStatus {
    /// A track is currently playing.
    Playing,

    /// A track is currently paused.
    Paused,

    /// No track is currently playing.
    Stopped,
}

#[derive(Copy, Clone, Debug, Serialize, Deserialize)]
pub enum LoopStatus {
    /// The playback will stop when there are no more tracks to play.
    None,

    /// The current track will start again from the beginning once it has finished playing.
    Track,

    /// The playback loops through a list of tracks.
    Playlist,
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct ProgressChanged {
    /// Current position into the track in seconds.
    pub position: f32,
}

#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
pub struct AlbumInfo {
    /// The title of the current album.
    pub title: Option<String>,

    /// The list of artists of the album.
    pub artists: Vec<String>,
}

#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
pub struct TrackInfo {
    /// The title of the current track.
    pub title: Option<String>,

    /// The list of artists on this track. May be empty.
    pub artists: Vec<String>,

    /// The optional track number on the disc the album the track appears on.
    pub track_number: Option<i32>,

    /// Length of the track in seconds.
    pub length: Option<f32>,
}

#[derive(Clone, Debug, Serialize, Deserialize)]
#[serde(tag = "kind")]
pub enum InMsg {
    Connected,
    Disconnected,
    PlaybackStatusChanged(PlaybackStatus),
    VolumeChanged { volume: f32 },
    ShuffleChanged { shuffle: bool },
    LoopingChanged(LoopStatus),
    ProgressChanged(ProgressChanged),
    AlbumChanged(AlbumInfo),
    TrackChanged(TrackInfo),
}

#[derive(Clone, Debug, Serialize, Deserialize)]
#[serde(tag = "kind")]
pub enum OutMsg {
    /// Brings the media player's user interface to the front using any
    /// appropriate mechanism available.
    Raise,

    /// Pauses playback.
    Pause,

    /// Resumes playback.
    Play,

    /// Toggles playback between paused and resumed.
    PlayPause,

    /// Stops playback.
    Stop,

    /// Skips to the next track in the tracklist. Stops playback if there is
    /// none.
    Next,

    /// Skips to the previous track in the tracklist. Stops playback if there
    /// is no previous track and endless playback and track repeat are off.
    Previous,

    /// Sets the volume. Values are clamped to 0.0 to 1.0.
    SetVolume { volume: f32 },

    /// Seeks the current track's position in seconds.
    Seek { offset: f32 },
}