use std::{fmt, str::FromStr};

use serde::{de, Deserialize, Deserializer};

pub mod company;
pub mod in_process_transaction;
pub mod transaction;

/// Struct to deserialize paginated routes query parameters
#[derive(Deserialize)]
pub struct Pagination {
    #[serde(default, deserialize_with = "empty_string_as_none")]
    pub page: Option<u64>,
    #[serde(default, deserialize_with = "empty_string_as_none")]
    pub size: Option<u64>,
}

/// Struct to deserialize a company slug as a query parameters
#[derive(Deserialize)]
pub struct CompanySlug {
    #[serde(default, deserialize_with = "empty_string_as_none")]
    pub company_slug: Option<String>,
}

/// Struct to deserialize a limit as a query parameters
#[derive(Deserialize)]
pub struct Limit {
    #[serde(default, deserialize_with = "empty_string_as_none")]
    pub limit: Option<u64>,
}

fn empty_string_as_none<'de, D, T>(de: D) -> Result<Option<T>, D::Error>
where
    D: Deserializer<'de>,
    T: FromStr,
    T::Err: fmt::Display,
{
    let opt = Option::<String>::deserialize(de)?;
    match opt.as_deref() {
        None | Some("") => Ok(None),
        Some(s) => FromStr::from_str(s).map_err(de::Error::custom).map(Some),
    }
}