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use crate::util::deserialize_datetime;
use chrono::{DateTime, Utc};
use serde_derive::Deserialize;

/// Represents a timer binding schedule status.
#[derive(Debug, Deserialize)]
#[serde(rename_all = "PascalCase")]
pub struct ScheduleStatus {
    /// The last recorded schedule occurrence.
    #[serde(deserialize_with = "deserialize_datetime")]
    pub last: DateTime<Utc>,
    /// The expected next schedule occurrence.
    #[serde(deserialize_with = "deserialize_datetime")]
    pub next: DateTime<Utc>,
    /// The last time the timer record was updated.
    ///
    /// This is used to re-calculate `next` with the current schedule after a host restart.
    #[serde(deserialize_with = "deserialize_datetime")]
    pub last_updated: DateTime<Utc>,
}

#[cfg(test)]
mod tests {
    use super::*;
    use serde_json::from_str;

    #[test]
    fn it_deserializes_from_json() {
        const JSON: &'static str = r#"{"Last":"0001-01-01T00:00:00","Next":"2018-07-24T23:24:00-07:00","LastUpdated":"2018-07-28T02:00:32+00:00"}"#;

        let status: ScheduleStatus =
            from_str(JSON).expect("failed to parse schedule status JSON data");
        assert_eq!(status.last.to_rfc3339(), "0001-01-01T00:00:00+00:00");
        assert_eq!(status.next.to_rfc3339(), "2018-07-25T06:24:00+00:00");
        assert_eq!(
            status.last_updated.to_rfc3339(),
            "2018-07-28T02:00:32+00:00"
        );
    }
}