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//! The names are in the perspective of the client

use std::borrow::Cow;

use serde::{Serialize, Deserialize, de::DeserializeOwned};

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub enum MessageKind {
	SenderRequest,
	SenderMessage,
	SenderClose,
	ReceiverRequest,
	ReceiverMessage,
	ReceiverClose
}

impl MessageKind {
	pub fn into_close(self) -> Self {
		match self {
			Self::SenderRequest |
			Self::SenderMessage |
			Self::SenderClose => Self::SenderClose,
			Self::ReceiverRequest |
			Self::ReceiverMessage |
			Self::ReceiverClose => Self::ReceiverClose
		}
	}
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Message {
	pub kind: MessageKind,
	pub action: Cow<'static, str>,
	#[serde(default = "MessageData::null")]
	pub data: MessageData
}

#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(transparent)]
pub struct MessageData {
	inner: serde_json::Value
}

impl MessageData {
	pub fn null() -> Self {
		Self {
			inner: serde_json::Value::Null
		}
	}

	pub fn serialize<S>(value: S) -> Result<Self, serde_json::Error>
	where S: Serialize {
		Ok(Self {
			inner: serde_json::to_value(value)?
		})
	}

	pub fn deserialize<T>(self) -> Result<T, serde_json::Error>
	where T: DeserializeOwned {
		serde_json::from_value(self.inner)
	}
}