use time::OffsetDateTime;
use url::Url;

/// Represents a single record in the XML sitemap index.
///
/// ```rust
/// use time::macros::datetime;
/// use url::Url;
/// use sitemapo::record::IndexRecord;
///
/// let _ = IndexRecord::new(Url::parse("https://example.com/").unwrap())
///     .with_modified(datetime!(2020-01-01 0:00 UTC));
/// ```
#[derive(Debug, Clone)]
pub struct IndexRecord {
    pub(crate) location: Option<Url>,
    pub(crate) modified: Option<OffsetDateTime>,
}

impl IndexRecord {
    /// Creates a new instance with a provided location.
    pub fn new(location: Url) -> Self {
        Self {
            location: Some(location),
            modified: None,
        }
    }

    /// Creates a new instance with no location.
    pub(crate) fn clean() -> Self {
        Self {
            location: None,
            modified: None,
        }
    }

    ///
    pub fn with_modified(self, modified: OffsetDateTime) -> Self {
        Self {
            modified: Some(modified),
            ..self
        }
    }

    ///
    pub fn location(&self) -> &Url {
        self.location
            .as_ref()
            .expect("should be properly initialized")
    }

    ///
    pub fn modified(&self) -> &Option<OffsetDateTime> {
        &self.modified
    }
}

impl From<Url> for IndexRecord {
    fn from(location: Url) -> Self {
        IndexRecord::new(location)
    }
}