use config::session::{SameSite, SessionConfig};

pub fn read_cookie<'a>(cookie_header: &'a str, name: &str) -> Option<&'a str> {
    cookie_header.split(';').find_map(|pair| {
        let (key, value) = pair.split_once('=')?;
        if key.trim() == name {
            Some(value.trim())
        } else {
            None
        }
    })
}

pub fn clear_session_cookie(config: &SessionConfig) -> String {
    build(config, "", 0)
}

pub fn session_cookie(config: &SessionConfig, value: &str, max_age_secs: i64) -> String {
    build(config, value, max_age_secs)
}

fn build(config: &SessionConfig, value: &str, max_age_secs: i64) -> String {
    let mut cookie = format!(
        "{}={value}; Max-Age={max_age_secs}; HttpOnly",
        config.cookie_name
    );
    if let Some(path) = &config.path {
        cookie.push_str("; Path=");
        cookie.push_str(path);
    }
    if let Some(domain) = &config.domain {
        if !domain.is_empty() {
            cookie.push_str("; Domain=");
            cookie.push_str(domain);
        }
    }
    if config.secure || matches!(config.same_site, SameSite::None) {
        cookie.push_str("; Secure");
    }
    cookie.push_str("; SameSite=");
    cookie.push_str(match config.same_site {
        SameSite::Strict => "Strict",
        SameSite::Lax => "Lax",
        SameSite::None => "None",
    });
    cookie
}