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// Copyright (C) 2019-2022 Aleo Systems Inc.
// This file is part of the snarkVM library.

// The snarkVM library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// The snarkVM library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with the snarkVM library. If not, see <https://www.gnu.org/licenses/>.

use super::*;

impl<N: Network> ToBits for Record<N, Plaintext<N>> {
    /// Returns this data as a list of **little-endian** bits.
    fn to_bits_le(&self) -> Vec<bool> {
        // Compute the data bits.
        let data_bits_le = self
            .data
            .iter()
            .flat_map(|(identifier, entry)| [identifier.to_bits_le(), entry.to_bits_le()])
            .flatten()
            .collect::<Vec<_>>();

        // Construct the record bits.
        let mut bits_le = self.owner.to_bits_le();
        bits_le.extend(self.gates.to_bits_le());
        bits_le.extend(
            u32::try_from(data_bits_le.len()).or_halt_with::<N>("Record data exceeds u32::MAX bits").to_bits_le(),
        );
        bits_le.extend(data_bits_le);
        bits_le.extend(self.nonce.to_bits_le());
        bits_le
    }

    /// Returns this data as a list of **big-endian** bits.
    fn to_bits_be(&self) -> Vec<bool> {
        // Compute the data bits.
        let data_bits_be = self
            .data
            .iter()
            .flat_map(|(identifier, entry)| [identifier.to_bits_be(), entry.to_bits_be()])
            .flatten()
            .collect::<Vec<_>>();

        // Construct the record bits.
        let mut bits_be = self.owner.to_bits_be();
        bits_be.extend(self.gates.to_bits_be());
        bits_be.extend(
            u32::try_from(data_bits_be.len()).or_halt_with::<N>("Record data exceeds u32::MAX bits").to_bits_be(),
        );
        bits_be.extend(data_bits_be);
        bits_be.extend(self.nonce.to_bits_be());
        bits_be
    }
}

impl<N: Network> ToBits for Record<N, Ciphertext<N>> {
    /// Returns this data as a list of **little-endian** bits.
    fn to_bits_le(&self) -> Vec<bool> {
        // Compute the data bits.
        let data_bits_le = self
            .data
            .iter()
            .flat_map(|(identifier, entry)| [identifier.to_bits_le(), entry.to_bits_le()])
            .flatten()
            .collect::<Vec<_>>();

        // Construct the record bits.
        let mut bits_le = self.owner.to_bits_le();
        bits_le.extend(self.gates.to_bits_le());
        bits_le.extend(
            u32::try_from(data_bits_le.len()).or_halt_with::<N>("Record data exceeds u32::MAX bits").to_bits_le(),
        );
        bits_le.extend(data_bits_le);
        bits_le.extend(self.nonce.to_bits_le());
        bits_le
    }

    /// Returns this data as a list of **big-endian** bits.
    fn to_bits_be(&self) -> Vec<bool> {
        // Compute the data bits.
        let data_bits_be = self
            .data
            .iter()
            .flat_map(|(identifier, entry)| [identifier.to_bits_be(), entry.to_bits_be()])
            .flatten()
            .collect::<Vec<_>>();

        // Construct the record bits.
        let mut bits_be = self.owner.to_bits_be();
        bits_be.extend(self.gates.to_bits_be());
        bits_be.extend(
            u32::try_from(data_bits_be.len()).or_halt_with::<N>("Record data exceeds u32::MAX bits").to_bits_be(),
        );
        bits_be.extend(data_bits_be);
        bits_be.extend(self.nonce.to_bits_be());
        bits_be
    }
}