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use std::fmt;

use zbus::zvariant::{self, Type, Value};

/// A repeat / loop status.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Type)]
#[zvariant(signature = "s")]
#[doc(alias = "Loop_Status")]
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,
}

impl LoopStatus {
    /// Returns the string representation of this loop status.
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::None => "None",
            Self::Track => "Track",
            Self::Playlist => "Playlist",
        }
    }
}

impl fmt::Display for LoopStatus {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.write_str(self.as_str())
    }
}

impl<'a> TryFrom<Value<'a>> for LoopStatus {
    type Error = zvariant::Error;

    fn try_from(value: Value<'a>) -> Result<Self, Self::Error> {
        match value {
            Value::Str(s) => match s.as_str() {
                "None" => Ok(Self::None),
                "Track" => Ok(Self::Track),
                "Playlist" => Ok(Self::Playlist),
                _ => Err(zvariant::Error::Message(format!(
                    "invalid loop status: {}",
                    s
                ))),
            },
            _ => Err(zvariant::Error::IncorrectType),
        }
    }
}

impl<'a> From<LoopStatus> for Value<'a> {
    fn from(status: LoopStatus) -> Self {
        Value::new(status.as_str())
    }
}