use std::sync::Arc;

use calibre_db::{calibre::Calibre, data::pagination::SortOrder};
use poem::{
    handler,
    web::{Data, Html, Path},
};

use crate::{app_state::AppState, handlers::paginated};

#[handler]
pub async fn handler_init(state: Data<&Arc<AppState>>) -> Result<Html<String>, poem::Error> {
    authors(&state.calibre, None, &SortOrder::ASC)
}

#[handler]
pub async fn handler(
    Path((cursor, sort_order)): Path<(String, SortOrder)>,
    state: Data<&Arc<AppState>>,
) -> Result<Html<String>, poem::Error> {
    authors(&state.calibre, Some(&cursor), &sort_order)
}

fn authors(
    calibre: &Calibre,
    cursor: Option<&str>,
    sort_order: &SortOrder,
) -> Result<Html<String>, poem::Error> {
    paginated::render(
        "authors",
        || calibre.authors(25, cursor, sort_order),
        |author| author.sort.clone(),
        |cursor| calibre.has_previous_authors(cursor),
        |cursor| calibre.has_more_authors(cursor),
    )
}