use error::NekrochanError;
use lazy_static::lazy_static;
use std::{collections::HashMap, sync::RwLock};

lazy_static! {
    pub static ref CAPTCHA: RwLock<HashMap<(String, String, String), String>> =
        RwLock::new(HashMap::new());
}

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

pub fn paginate(page_size: i64, count: i64) -> i64 {
    count / page_size + (count % page_size).signum()
}

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(())
}