/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use std::fmt;

use serde::{
    de::{self, Deserialize, Deserializer, Visitor},
    ser::{Serialize, Serializer},
};

use crate::Guid;

struct GuidVisitor;
impl Visitor<'_> for GuidVisitor {
    type Value = Guid;
    #[inline]
    fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
        formatter.write_str("a sync guid")
    }
    #[inline]
    fn visit_str<E: de::Error>(self, s: &str) -> Result<Self::Value, E> {
        Ok(Guid::from_slice(s.as_ref()))
    }
}

impl<'de> Deserialize<'de> for Guid {
    #[inline]
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_str(GuidVisitor)
    }
}

impl Serialize for Guid {
    #[inline]
    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        serializer.serialize_str(self.as_str())
    }
}

#[cfg(test)]
mod test {
    use super::*;
    #[test]
    fn test_ser_de() {
        let guid = Guid::from("asdffdsa12344321");
        assert_eq!(
            serde_json::to_value(guid).unwrap(),
            serde_json::json!("asdffdsa12344321")
        );

        let guid = Guid::from("");
        assert_eq!(serde_json::to_value(guid).unwrap(), serde_json::json!(""));

        let guid = Guid::from(&b"abcd43211234"[..]);
        assert_eq!(
            serde_json::to_value(guid).unwrap(),
            serde_json::json!("abcd43211234")
        );
    }
}