use std::io::Write;

use rmp::encode::{

    write_array_len, write_bin, write_bool, write_ext_meta, write_f32, write_f64, write_map_len,

    write_nil, write_sint, write_str, write_uint,

};

use super::Error;

use crate::{IntPriv, Integer, Utf8String, Value};

/// Encodes and attempts to write the most efficient representation of the given Value.

///

/// # Note

///

/// All instances of `ErrorKind::Interrupted` are handled by this function and the underlying

/// operation is retried.

pub fn write_value<W>(wr: &mut W, val: &Value) -> Result<(), Error>

    where W: Write

{

    match *val {

        Value::Nil => {

            write_nil(wr).map_err(Error::InvalidMarkerWrite)?;

        }

        Value::Boolean(val) => {

            write_bool(wr, val).map_err(Error::InvalidMarkerWrite)?;

        }

        Value::Integer(Integer { n }) => {

            match n {

                IntPriv::PosInt(n) => {

                    write_uint(wr, n)?;

                }

                IntPriv::NegInt(n) => {

                    write_sint(wr, n)?;

                }

            }

        }

        Value::F32(val) => {

            write_f32(wr, val)?;

        }

        Value::F64(val) => {

            write_f64(wr, val)?;

        }

        Value::String(Utf8String { ref s }) => match *s {

            Ok(ref val) => write_str(wr, val)?,

            Err(ref err) => write_bin(wr, &err.0)?,

        },

        Value::Binary(ref val) => {

            write_bin(wr, val)?;

        }

        Value::Array(ref vec) => {

            write_array_len(wr, vec.len() as u32)?;

            for v in vec {

                write_value(wr, v)?;

            }

        }

        Value::Map(ref map) => {

            write_map_len(wr, map.len() as u32)?;

            for (key, val) in map {

                write_value(wr, key)?;

                write_value(wr, val)?;

            }

        }

        Value::Ext(ty, ref data) => {

            write_ext_meta(wr, data.len() as u32, ty)?;

            wr.write_all(data).map_err(Error::InvalidDataWrite)?;

        }

    }

    Ok(())

}