use serde::{Deserialize, Deserializer};
use time::format_description::FormatItem;
use time::macros::format_description;
use time::{OffsetDateTime, PrimitiveDateTime};

const ALERT_FORMAT: &[FormatItem<'_>] =
    format_description!("[weekday repr:short], [day].[month].[year], [hour]:[minute]");
const ALERTS_FORMAT: &[FormatItem<'_>] = format_description!(
    "[day].[month].[year] [hour]:[minute]:[second].[subsecond] [offset_hour sign:mandatory][offset_minute]"
);

pub fn deserialize_alert<'de, D>(deserializer: D) -> Result<PrimitiveDateTime, D::Error>
where
    D: Deserializer<'de>,
{
    let s: &str = Deserialize::deserialize(deserializer)?;
    PrimitiveDateTime::parse(s, ALERT_FORMAT).map_err(serde::de::Error::custom)
}

pub fn deserialize_alerts<'de, D>(deserializer: D) -> Result<OffsetDateTime, D::Error>
where
    D: Deserializer<'de>,
{
    let s: &str = Deserialize::deserialize(deserializer)?;
    OffsetDateTime::parse(s, ALERTS_FORMAT).map_err(serde::de::Error::custom)
}