splashboard 1.2.0

//! Shared response types for the issue / PR family. The REST search endpoints and the
//! per-repo PR/issue endpoints return almost the same item shape; they share this struct so
//! each fetcher can focus on its own URL composition and rendering.

use serde::Deserialize;

use crate::payload::{
    Body, EntriesData, Entry, LinkedLine, LinkedTextBlockData, TextBlockData, TimelineData,
    TimelineEvent,
};
use crate::render::Shape;

use super::common::{RepoSlug, parse_timestamp};

#[derive(Debug, Deserialize)]
pub struct IssueItem {
    pub title: String,
    pub number: u64,
    /// Only present on the `/search/issues` response. Per-repo endpoints omit this.
    #[serde(default)]
    pub repository_url: String,
    #[serde(default)]
    pub updated_at: String,
    #[serde(default)]
    pub html_url: String,
    #[serde(default)]
    pub state: String,
}

#[derive(Debug, Deserialize)]
pub struct SearchResult {
    #[serde(default)]
    pub items: Vec<IssueItem>,
}

/// Extracts `owner/name` from a GitHub API repository URL
/// (`https://api.github.com/repos/owner/name`).
pub fn repo_from_url(url: &str) -> Option<RepoSlug> {
    let rest = url.strip_prefix("https://api.github.com/repos/")?;
    RepoSlug::parse(rest)
}

/// Renders issue / PR items to one of `TextBlock` / `LinkedTextBlock` / `Entries` / `Timeline`.
/// When `include_repo` is true, each line/event is prefixed with `owner/name` — used by
/// user-scope fetchers that return items across many repos. Per-repo fetchers pass `false` so
/// the repo name isn't repeated on every row.
pub fn render_items(items: &[IssueItem], shape: Shape, include_repo: bool) -> Body {
    match shape {
        Shape::Entries => Body::Entries(EntriesData {
            items: items
                .iter()
                .map(|i| Entry {
                    key: entries_key(i, include_repo),
                    value: Some(i.title.clone()),
                    status: None,
                })
                .collect(),
        }),
        Shape::LinkedTextBlock => Body::LinkedTextBlock(LinkedTextBlockData {
            items: items
                .iter()
                .map(|i| LinkedLine {
                    text: format!("{} {}", short_label(i, include_repo), i.title),
                    url: link_for(i),
                })
                .collect(),
        }),
        Shape::Timeline => Body::Timeline(TimelineData {
            events: items
                .iter()
                .map(|i| TimelineEvent {
                    timestamp: parse_timestamp(&i.updated_at),
                    title: short_label(i, include_repo),
                    detail: Some(i.title.clone()),
                    status: None,
                })
                .collect(),
        }),
        _ => Body::TextBlock(TextBlockData {
            lines: items
                .iter()
                .map(|i| format!("{} {}", short_label(i, include_repo), i.title))
                .collect(),
        }),
    }
}

fn link_for(i: &IssueItem) -> Option<String> {
    if i.html_url.is_empty() {
        None
    } else {
        Some(i.html_url.clone())
    }
}

fn short_label(i: &IssueItem, include_repo: bool) -> String {
    if include_repo {
        let repo = repo_from_url(&i.repository_url)
            .map(|s| s.as_path())
            .unwrap_or_else(|| "?".into());
        format!("{repo}#{}", i.number)
    } else {
        format!("#{}", i.number)
    }
}

fn entries_key(i: &IssueItem, include_repo: bool) -> String {
    if include_repo {
        let name = repo_from_url(&i.repository_url)
            .map(|s| s.name)
            .unwrap_or_else(|| "?".into());
        format!("{name} #{}", i.number)
    } else {
        format!("#{}", i.number)
    }
}

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

    fn issue_item() -> IssueItem {
        IssueItem {
            title: "Fix cached splash mismatch".into(),
            number: 42,
            repository_url: "https://api.github.com/repos/unhappychoice/splashboard".into(),
            updated_at: "2026-04-22T10:15:30Z".into(),
            html_url: "https://github.com/unhappychoice/splashboard/issues/42".into(),
            state: "open".into(),
        }
    }

    #[test]
    fn repo_from_url_extracts_slug() {
        let s = repo_from_url("https://api.github.com/repos/foo/bar").unwrap();
        assert_eq!(s.owner, "foo");
        assert_eq!(s.name, "bar");
    }

    #[test]
    fn repo_from_url_rejects_non_api_host() {
        assert!(repo_from_url("https://github.com/foo/bar").is_none());
    }

    #[test]
    fn render_entries_include_repo_name_and_title() {
        let Body::Entries(data) = render_items(&[issue_item()], Shape::Entries, true) else {
            panic!("expected entries");
        };
        assert_eq!(data.items.len(), 1);
        assert_eq!(data.items[0].key, "splashboard #42");
        assert_eq!(
            data.items[0].value.as_deref(),
            Some("Fix cached splash mismatch")
        );
        assert!(data.items[0].status.is_none());
    }

    #[test]
    fn render_linked_text_block_uses_short_label_and_optional_url() {
        let mut item = issue_item();
        item.html_url.clear();

        let Body::LinkedTextBlock(data) = render_items(&[item], Shape::LinkedTextBlock, false)
        else {
            panic!("expected linked text block");
        };
        assert_eq!(data.items.len(), 1);
        assert_eq!(data.items[0].text, "#42 Fix cached splash mismatch");
        assert!(data.items[0].url.is_none());
    }

    #[test]
    fn render_timeline_uses_repo_fallback_and_parsed_timestamp() {
        let mut item = issue_item();
        item.repository_url = "https://api.github.com/not-a-repo".into();

        let Body::Timeline(data) = render_items(&[item], Shape::Timeline, true) else {
            panic!("expected timeline");
        };
        assert_eq!(data.events.len(), 1);
        assert_eq!(data.events[0].timestamp, 1_776_852_930);
        assert_eq!(data.events[0].title, "?#42");
        assert_eq!(
            data.events[0].detail.as_deref(),
            Some("Fix cached splash mismatch")
        );
        assert!(data.events[0].status.is_none());
    }

    #[test]
    fn render_text_block_is_the_fallback_shape() {
        let Body::TextBlock(data) = render_items(&[issue_item()], Shape::TextBlock, false) else {
            panic!("expected text block");
        };
        assert_eq!(data.lines, vec!["#42 Fix cached splash mismatch"]);
    }

    #[test]
    fn search_result_defaults_missing_items_to_empty() {
        let result: SearchResult = serde_json::from_str("{}").unwrap();
        assert!(result.items.is_empty());
    }
}