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use crate::{
    errors::DeserializationError,
    field::{element::FieldElement, traits::IsField},
};

use crate::errors::ByteConversionError;
/// A trait for converting an element to and from its byte representation and
/// for getting an element from its byte representation in big-endian or
/// little-endian order.
pub trait ByteConversion {
    /// Returns the byte representation of the element in big-endian order.}
    #[cfg(feature = "alloc")]
    fn to_bytes_be(&self) -> alloc::vec::Vec<u8>;

    /// Returns the byte representation of the element in little-endian order.
    #[cfg(feature = "alloc")]
    fn to_bytes_le(&self) -> alloc::vec::Vec<u8>;

    /// Returns the element from its byte representation in big-endian order.
    fn from_bytes_be(bytes: &[u8]) -> Result<Self, ByteConversionError>
    where
        Self: Sized;

    /// Returns the element from its byte representation in little-endian order.
    fn from_bytes_le(bytes: &[u8]) -> Result<Self, ByteConversionError>
    where
        Self: Sized;
}

/// Serialize function without args
/// Used for serialization when formatting options are not relevant
#[cfg(feature = "alloc")]
pub trait AsBytes {
    /// Default serialize without args
    fn as_bytes(&self) -> alloc::vec::Vec<u8>;
}

#[cfg(feature = "alloc")]
impl AsBytes for u32 {
    fn as_bytes(&self) -> alloc::vec::Vec<u8> {
        self.to_le_bytes().to_vec()
    }
}

#[cfg(feature = "alloc")]
impl AsBytes for u64 {
    fn as_bytes(&self) -> alloc::vec::Vec<u8> {
        self.to_le_bytes().to_vec()
    }
}

/// Deserialize function without args
pub trait Deserializable {
    fn deserialize(bytes: &[u8]) -> Result<Self, DeserializationError>
    where
        Self: Sized;
}

pub trait IsRandomFieldElementGenerator<F: IsField> {
    fn generate(&self) -> FieldElement<F>;
}