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// Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use super::*;

impl<A: Aleo> ToBits for ProgramID<A> {
    type Boolean = Boolean<A>;

    /// Returns the little-endian bits of the program ID.
    fn to_bits_le(&self) -> Vec<Self::Boolean> {
        (&self).to_bits_le()
    }

    /// Returns the big-endian bits of the program ID.
    fn to_bits_be(&self) -> Vec<Self::Boolean> {
        (&self).to_bits_be()
    }
}

impl<A: Aleo> ToBits for &ProgramID<A> {
    type Boolean = Boolean<A>;

    /// Returns the little-endian bits of the program ID.
    fn to_bits_le(&self) -> Vec<Self::Boolean> {
        let mut bits = self.name().to_bits_le();
        bits.extend(self.network().to_bits_le());
        bits
    }

    /// Returns the big-endian bits of the program ID.
    fn to_bits_be(&self) -> Vec<Self::Boolean> {
        let mut bits = self.name().to_bits_be();
        bits.extend(self.network().to_bits_be());
        bits
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::{data::identifier::tests::sample_lowercase_console_identifier_as_string, Circuit};

    use anyhow::Result;

    const ITERATIONS: usize = 100;

    fn check_to_bits_le(mode: Mode) -> Result<()> {
        for _ in 0..ITERATIONS {
            // Sample a random fixed-length alphanumeric string, that always starts with an alphabetic character.
            let expected_name_string = sample_lowercase_console_identifier_as_string::<Circuit>()?;
            let expected = console::ProgramID::<<Circuit as Environment>::Network>::from_str(&format!(
                "{expected_name_string}.aleo"
            ))?;

            let candidate = ProgramID::<Circuit>::new(mode, expected);
            assert_eq!(expected.to_bits_le(), candidate.to_bits_le().eject_value());
        }
        Ok(())
    }

    fn check_to_bits_be(mode: Mode) -> Result<()> {
        for _ in 0..ITERATIONS {
            // Sample a random fixed-length alphanumeric string, that always starts with an alphabetic character.
            let expected_name_string = sample_lowercase_console_identifier_as_string::<Circuit>()?;
            let expected = console::ProgramID::<<Circuit as Environment>::Network>::from_str(&format!(
                "{expected_name_string}.aleo"
            ))?;

            let candidate = ProgramID::<Circuit>::new(mode, expected);
            assert_eq!(expected.to_bits_be(), candidate.to_bits_be().eject_value());
        }
        Ok(())
    }

    #[test]
    fn test_to_bits_le() -> Result<()> {
        check_to_bits_le(Mode::Constant)?;
        check_to_bits_le(Mode::Public)?;
        check_to_bits_le(Mode::Private)?;
        Ok(())
    }

    #[test]
    fn test_to_bits_be() -> Result<()> {
        check_to_bits_be(Mode::Constant)?;
        check_to_bits_be(Mode::Public)?;
        check_to_bits_be(Mode::Private)?;
        Ok(())
    }
}