#[cfg(feature = "std")]
use zeroize::Zeroize;

#[cfg(feature = "borsh")]
use borsh::{BorshSerialize, BorshDeserialize};
#[cfg(feature = "serde")]
use serde::{Serialize, Deserialize};

use scale::{Encode, Decode, MaxEncodedLen};
use scale_info::TypeInfo;

use sp_core::H256;

/// The type used to identify block numbers.
#[derive(
  Clone, Copy, Default, PartialEq, Eq, Hash, Debug, Encode, Decode, MaxEncodedLen, TypeInfo,
)]
#[cfg_attr(feature = "std", derive(Zeroize))]
#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct BlockNumber(pub u64);
impl From<u64> for BlockNumber {
  fn from(number: u64) -> BlockNumber {
    BlockNumber(number)
  }
}

/// The type used to identify block hashes.
// This may not be universally compatible
// If a block exists with a hash which isn't 32-bytes, it can be hashed into a value with 32-bytes
// This would require the processor to maintain a mapping of 32-byte IDs to actual hashes, which
// would be fine
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Encode, Decode, MaxEncodedLen, TypeInfo)]
#[cfg_attr(feature = "std", derive(Zeroize))]
#[cfg_attr(feature = "borsh", derive(BorshSerialize, BorshDeserialize))]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct BlockHash(pub [u8; 32]);

impl AsRef<[u8]> for BlockHash {
  fn as_ref(&self) -> &[u8] {
    self.0.as_ref()
  }
}

impl From<[u8; 32]> for BlockHash {
  fn from(hash: [u8; 32]) -> BlockHash {
    BlockHash(hash)
  }
}

impl From<H256> for BlockHash {
  fn from(hash: H256) -> BlockHash {
    BlockHash(hash.into())
  }
}