// Copyright 2020. The Tari Project
//
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
// following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
// disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
// following disclaimer in the documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote
// products derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
use tari_hashing::BulletRangeProofHashDomain;
mod bullet_rangeproofs;
mod fixed_hash;
use blake2::Blake2b;
pub use bullet_rangeproofs::BulletRangeProof;
use digest::consts::{U32, U64};
use tari_crypto::{
    compressed_key::CompressedKey,
    ristretto::{
        CompressedRistrettoComAndPubSig,
        CompressedRistrettoSchnorr,
        RistrettoComAndPubSig,
        RistrettoPublicKey,
        RistrettoSchnorrWithDomain,
        RistrettoSecretKey,
        bulletproofs_plus::BulletproofsPlusService,
        pedersen::{CompressedPedersenCommitment, extended_commitment_factory::ExtendedPedersenCommitmentFactory},
    },
    signatures::SchnorrSignature,
};
use tari_hashing::WalletMessageSigningDomain;
pub type BlockHash = FixedHash;

pub use fixed_hash::{FixedHash, FixedHashSizeError};

/// Define the explicit Signature implementation for the Tari base layer. A different signature scheme can be
/// employed by redefining this type.
pub type CompressedSignature = CompressedRistrettoSchnorr;
pub type UncompressedSignature = RistrettoSchnorr;
/// Define a generic signature type using a hash domain.
pub type SignatureWithDomain<H> = RistrettoSchnorrWithDomain<H>;
/// Define the explicit Commitment Signature implementation for the Tari base layer.
pub type ComAndPubSignature = CompressedRistrettoComAndPubSig;
pub type UncompressedComAndPubSignature = RistrettoComAndPubSig;

/// Define the explicit Commitment implementation for the Tari base layer.
pub type CompressedCommitment = CompressedPedersenCommitment;
pub type UncompressedCommitment = PedersenCommitment;
pub type CommitmentFactory = ExtendedPedersenCommitmentFactory;

/// Define the explicit Public key implementation for the Tari base layer
pub type CompressedPublicKey = CompressedKey<RistrettoPublicKey>;
pub type UncompressedPublicKey = RistrettoPublicKey;

/// Define the explicit Secret key implementation for the Tari base layer.
pub type PrivateKey = RistrettoSecretKey;

/// Define the hash function that will be used to produce a signature challenge
pub type SignatureHasher = Blake2b<U64>;

/// Specify the digest type for signature challenges
pub type Challenge = Blake2b<U64>;

/// Define the data type that is used to store results of a hash output
pub type HashOutput = FixedHash;

pub const RANGE_PROOF_BIT_LENGTH: usize = 64; // 2^64
pub const RANGE_PROOF_AGGREGATION_FACTOR: usize = 1;

/// Specify the range proof type
pub type RangeProofService = BulletproofsPlusService;

/// Specify the range proof
pub type RangeProof = BulletRangeProof;

// Diffie-Hellman key exchange type
pub type CommsDHKE = DiffieHellmanSharedSecret<RistrettoPublicKey>;

use tari_crypto::{
    dhke::DiffieHellmanSharedSecret,
    hashing::DomainSeparatedHasher,
    ristretto::{RistrettoSchnorr, pedersen::PedersenCommitment},
};

pub type BulletRangeProofHasherBlake256 = DomainSeparatedHasher<Blake2b<U32>, BulletRangeProofHashDomain>;

pub type WalletMessageSchnorrSignature =
    SchnorrSignature<RistrettoPublicKey, RistrettoSecretKey, WalletMessageSigningDomain>;

#[derive(Debug)]
pub struct BadBlock {
    pub hash: FixedHash,
    pub height: u64,
    pub reason: String,
}
