use std::fmt::Debug;
use async_std::io::Read;

use serde_json::Value;
use serde::{Serialize, Deserialize};
use kuska_ssb::api::dto::WhoAmIOut;
use kuska_ssb::feed::{Feed, Message};
use kuska_ssb::rpc::{RecvMsg, RequestNo, RpcReader};
use kuska_ssb::api::dto::content::TypedMessage;

use crate::error::GolgiError;


pub type SsbMessageContent = TypedMessage;

/// Data type representing the `value` of a message object (`KVT`). More information concerning the
/// data model can be found
/// in the [`Metadata` documentation](https://spec.scuttlebutt.nz/feed/messages.html#metadata).
#[derive(Serialize, Deserialize, Debug)]
#[serde(deny_unknown_fields)]
pub struct SsbMessageValue {
    pub previous: Option<String>,
    pub author: String,
    pub sequence: u64,
    pub timestamp: f64,
    pub hash: String,
    pub content: Value,
    pub signature: String,
}

impl SsbMessageValue {
    pub fn get_message_type(&self) -> String {
        let msg_type: String = self.content.get("type").map(|msg_type| msg_type.to_string()).unwrap_or_else(|| "none".to_string());
        msg_type
    }

    pub fn into_ssb_message_content(self) -> Result<SsbMessageContent, GolgiError> {
        let m: SsbMessageContent = serde_json::from_value(self.content)?;
        Ok(m)
    }
}

/// Data type representing the `value` of a message object (`KVT`). More information concerning the
/// data model can be found
/// in the [`Metadata` documentation](https://spec.scuttlebutt.nz/feed/messages.html#metadata).
#[derive(Serialize, Deserialize, Debug)]
#[serde(deny_unknown_fields)]
pub struct SsbKVT {
    pub key: String,
    pub value: SsbMessageValue,
    pub timestamp: f64,
    pub rts: Option<f64>,
}