//! `brittle-model` — shared data types for the Brittle reference manager.
//!
//! This crate contains all model types that cross the IPC boundary between the
//! Tauri backend (`brittle-core`) and the Leptos/WASM frontend. It has no
//! native-only dependencies and compiles to both `wasm32-unknown-unknown` and
//! native targets.
//!
//! Both `brittle-core` and `brittle-ui` depend on this crate.

pub mod annotation;
pub mod ids;
pub mod library;
pub mod reference;
pub mod snapshot;

pub use annotation::{
    Annotation, AnnotationSet, AnnotationType, Color, Point, Quad, Rect, TextMarkupType,
};
pub use ids::{AnnotationId, LibraryId, ReferenceId};
pub use library::Library;
pub use reference::{EntryType, PdfAttachment, Person, Reference};
pub use snapshot::Snapshot;

use serde::Serialize;

/// A lightweight summary of a reference, suitable for list views.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, serde::Deserialize)]
pub struct ReferenceSummary {
    pub id: ReferenceId,
    pub cite_key: String,
    pub entry_type: EntryType,
    pub title: Option<String>,
    pub authors: Vec<Person>,
    pub year: Option<String>,
}

impl ReferenceSummary {
    /// Title or "[no title]" fallback.
    pub fn title_display(&self) -> &str {
        self.title.as_deref().unwrap_or("[no title]")
    }

    /// Compact author string: "Family", "A & B", or "A et al."
    pub fn author_display(&self) -> String {
        match self.authors.len() {
            0 => "—".into(),
            1 => self.authors[0].family.clone(),
            2 => format!("{} & {}", self.authors[0].family, self.authors[1].family),
            _ => format!("{} et al.", self.authors[0].family),
        }
    }
}

impl From<&Reference> for ReferenceSummary {
    fn from(r: &Reference) -> Self {
        Self {
            id: r.id,
            cite_key: r.cite_key.clone(),
            entry_type: r.entry_type.clone(),
            title: r.title().map(str::to_owned),
            authors: r.authors.clone(),
            year: r.year().map(str::to_owned),
        }
    }
}

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

    fn p(family: &str) -> Person {
        Person { family: family.into(), given: None, prefix: None, suffix: None }
    }

    fn base_summary() -> ReferenceSummary {
        ReferenceSummary {
            id: ReferenceId::new(),
            cite_key: "x".into(),
            entry_type: EntryType::Article,
            title: None,
            authors: vec![],
            year: None,
        }
    }

    #[test]
    fn title_display_fallback() {
        let rs = base_summary();
        assert_eq!(rs.title_display(), "[no title]");
    }

    #[test]
    fn title_display_with_title() {
        let rs = ReferenceSummary { title: Some("My Paper".into()), ..base_summary() };
        assert_eq!(rs.title_display(), "My Paper");
    }

    #[test]
    fn author_display_empty() {
        assert_eq!(base_summary().author_display(), "—");
    }

    #[test]
    fn author_display_one() {
        let rs = ReferenceSummary { authors: vec![p("Smith")], ..base_summary() };
        assert_eq!(rs.author_display(), "Smith");
    }

    #[test]
    fn author_display_two() {
        let rs = ReferenceSummary { authors: vec![p("Smith"), p("Jones")], ..base_summary() };
        assert_eq!(rs.author_display(), "Smith & Jones");
    }

    #[test]
    fn author_display_many() {
        let rs = ReferenceSummary {
            authors: vec![p("Smith"), p("Jones"), p("Brown")],
            ..base_summary()
        };
        assert_eq!(rs.author_display(), "Smith et al.");
    }

    #[test]
    fn summary_from_reference() {
        let mut r = Reference::new("einstein1905", EntryType::Article);
        r.fields.insert("title".into(), "On the Electrodynamics of Moving Bodies".into());
        r.fields.insert("year".into(), "1905".into());
        r.authors.push(Person::new("Einstein"));

        let s = ReferenceSummary::from(&r);
        assert_eq!(s.cite_key, "einstein1905");
        assert_eq!(s.title_display(), "On the Electrodynamics of Moving Bodies");
        assert_eq!(s.author_display(), "Einstein");
        assert_eq!(s.year.as_deref(), Some("1905"));
    }
}
