use std::{ffi::CString, ptr};

use crate::check_status;

use super::ToNapiValue;

pub struct Symbol {
  desc: Option<String>,
}

impl Symbol {
  pub fn new(desc: String) -> Self {
    Self { desc: Some(desc) }
  }

  pub fn identity() -> Self {
    Self { desc: None }
  }
}

impl ToNapiValue for Symbol {
  unsafe fn to_napi_value(
    env: napi_sys::napi_env,
    val: Self,
  ) -> crate::Result<napi_sys::napi_value> {
    let mut symbol_value = ptr::null_mut();
    check_status!(unsafe {
      napi_sys::napi_create_symbol(
        env,
        match val.desc {
          Some(desc) => {
            let mut desc_string = ptr::null_mut();
            let desc_len = desc.len();
            let desc_c_string = CString::new(desc)?;
            check_status!(napi_sys::napi_create_string_utf8(
              env,
              desc_c_string.as_ptr(),
              desc_len,
              &mut desc_string
            ))?;
            desc_string
          }
          None => ptr::null_mut(),
        },
        &mut symbol_value,
      )
    })?;
    Ok(symbol_value)
  }
}