use super::{snapshot::Message, Id};
use crate::{
    channel::Channel,
    event::{Instant, Sequenced},
};

#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
pub struct Event {
    #[serde(flatten)]
    pub kind: Kind,
}

impl Sequenced for Event {
    fn instant(&self) -> Instant {
        self.kind.instant()
    }
}

#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
#[serde(tag = "type", rename_all = "snake_case")]
pub enum Kind {
    Sent(Sent),
    Deleted(Deleted),
}

impl Sequenced for Kind {
    fn instant(&self) -> Instant {
        match self {
            Self::Sent(sent) => sent.instant(),
            Self::Deleted(deleted) => deleted.instant(),
        }
    }
}

#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
pub struct Sent {
    #[serde(flatten)]
    pub message: Message,
}

impl Sequenced for Sent {
    fn instant(&self) -> Instant {
        self.message.sent
    }
}

impl From<Sent> for Kind {
    fn from(event: Sent) -> Self {
        Self::Sent(event)
    }
}

#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
pub struct Deleted {
    #[serde(flatten)]
    pub instant: Instant,
    pub channel: Channel,
    pub message: Id,
}

impl Sequenced for Deleted {
    fn instant(&self) -> Instant {
        self.instant
    }
}

impl From<Deleted> for Kind {
    fn from(event: Deleted) -> Self {
        Self::Deleted(event)
    }
}