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// Import necessary items from the pyo3 crate
use pyo3::{
	exceptions::PyTypeError,
	prelude::*,
	types::{PyDict, PyString},
};

// Define an enumeration for different event types
#[derive(Clone, Debug, PartialEq, Eq, Hash)]
pub enum MessageType {
	Start,
	Stop,
	Pause,
	Resume,
	Restart,
	Status,
	Metrics,
}

// Implement conversion from Python object to MessageType
impl<'a> FromPyObject<'a> for MessageType {
	fn extract(ob: &'a PyAny) -> PyResult<Self> {
		// Try to extract a string from the Python object
		if let Ok(message_type) = ob.extract::<&str>() {
			// Match the string to determine the EventType
			match message_type {
				"start" => Ok(MessageType::Start),
				"stop" => Ok(MessageType::Stop),
				"pause" => Ok(MessageType::Pause),
				"resume" => Ok(MessageType::Resume),
				"restart" => Ok(MessageType::Restart),
				"status" => Ok(MessageType::Status),
				"metrics" => Ok(MessageType::Metrics),
				// If the string does not match any known EventType, return an error
				_ => Err(PyErr::new::<PyTypeError, _>("Invalid message type")),
			}
		} else {
			// If extraction fails, return an error
			Err(PyErr::new::<PyTypeError, _>("Invalid message type"))
		}
	}
}

// Implement conversion from MessageType to Python object\
impl IntoPy<PyObject> for MessageType {
	fn into_py(self, py: Python) -> PyObject {
		// Create a new Python string
		let string = PyString::new(py, &format!("{:?}", self));
		// Return the string
		string.into()
	}
}

// Define a structure to represent the state of an event
#[derive(Clone, Debug, PartialEq)]
pub struct MessageState {
	pub message_type: MessageType,
	pub timestamp: f64,
	pub payload: String,
}

// Implement conversion from Python object to MessageState
impl<'a> FromPyObject<'a> for MessageState {
	fn extract(ob: &'a PyAny) -> PyResult<Self> {
		// Extract values for event_type, timestamp, and payload from the Python object
		let message_type = ob.get_item("message_type")?.extract()?;
		let timestamp = ob.get_item("timestamp")?.extract()?;
		let payload = ob.get_item("payload")?.extract()?;
		// Create and return an MessageState instance
		Ok(MessageState { message_type, timestamp, payload })
	}
}

// Implement conversion from MessageState to Python object
impl IntoPy<PyObject> for MessageState {
	fn into_py(self, py: Python) -> PyObject {
		// Create a new Python dictionary
		let dict = PyDict::new(py);
		// Insert the message_type, timestamp, and payload into the dictionary
		dict.set_item("message_type", self.message_type.into_py(py)).unwrap();
		dict.set_item("timestamp", self.timestamp).unwrap();
		dict.set_item("payload", self.payload).unwrap();
		// Return the dictionary
		dict.into()
	}
}