use askama::Template;
use db::models::{Board, Post};
use error::NekrochanError;
use web::tcx::TemplateCtx;

const GENERIC_PAGE_SIZE: i64 = 10;

pub mod auth;
pub mod cfg;
pub mod ctx;
pub mod db;
pub mod error;
pub mod files;
pub mod filters;
pub mod live_hub;
pub mod live_session;
pub mod markup;
pub mod perms;
pub mod qsform;
pub mod schedule;
pub mod trip;
pub mod web;

pub fn paginate(page_size: i64, count: i64) -> i64 {
    let pages = count / page_size + (count % page_size).signum();

    if pages == 0 {
        1
    } else {
        pages
    }
}

pub fn check_page(
    page: i64,
    pages: i64,
    page_limit: impl Into<Option<i64>>,
) -> Result<(), NekrochanError> {
    if page <= 0 || (page > pages && page != 1) {
        return Err(NekrochanError::InvalidPageError);
    }

    if let Some(page_limit) = page_limit.into() {
        if page > page_limit {
            return Err(NekrochanError::InvalidPageError);
        }
    }

    Ok(())
}

#[derive(Template)]
#[template(
    ext = "html",
    source = "{% import \"./macros/post.html\" as post %}{% call post::post(board, post, post.thread.is_some()) %}"
)]
pub struct PostTemplate<'a> {
    tcx: &'a TemplateCtx,
    board: &'a Board,
    post: &'a Post,
}