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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<N: Network, Instruction: InstructionTrait<N>, Command: CommandTrait<N>> Serialize
    for ProgramCore<N, Instruction, Command>
{
    /// Serializes the program into string or bytes.
    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        match serializer.is_human_readable() {
            true => serializer.collect_str(self),
            false => ToBytesSerializer::serialize_with_size_encoding(self, serializer),
        }
    }
}

impl<'de, N: Network, Instruction: InstructionTrait<N>, Command: CommandTrait<N>> Deserialize<'de>
    for ProgramCore<N, Instruction, Command>
{
    /// Deserializes the program from a string or bytes.
    fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
        match deserializer.is_human_readable() {
            true => FromStr::from_str(&String::deserialize(deserializer)?).map_err(de::Error::custom),
            false => FromBytesDeserializer::<Self>::deserialize_with_size_encoding(deserializer, "program"),
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::Program;
    use console::network::Testnet3;

    type CurrentNetwork = Testnet3;

    #[test]
    fn test_serde_json() -> Result<()> {
        let program_string = r"program to_parse.aleo;

struct message:
    first as field;
    second as field;

function compute:
    input r0 as message.private;
    add r0.first r0.second into r1;
    output r1 as field.private;
";
        // Parse a new program.
        let expected = Program::<CurrentNetwork>::from_str(program_string)?;

        // Serialize
        let expected_string = &expected.to_string();
        let candidate_string = serde_json::to_string(&expected)?;
        assert_eq!(expected_string, serde_json::Value::from_str(&candidate_string)?.as_str().unwrap());

        // Deserialize
        assert_eq!(expected, Program::from_str(expected_string)?);
        assert_eq!(expected, serde_json::from_str(&candidate_string)?);

        Ok(())
    }

    #[test]
    fn test_bincode() -> Result<()> {
        let program_string = r"program to_parse.aleo;

struct message:
    first as field;
    second as field;

function compute:
    input r0 as message.private;
    add r0.first r0.second into r1;
    output r1 as field.private;
";
        // Parse a new program.
        let expected = Program::<CurrentNetwork>::from_str(program_string)?;

        // Serialize
        let expected_bytes = expected.to_bytes_le()?;
        let expected_bytes_with_size_encoding = bincode::serialize(&expected)?;
        assert_eq!(&expected_bytes[..], &expected_bytes_with_size_encoding[8..]);

        // Deserialize
        assert_eq!(expected, Program::read_le(&expected_bytes[..])?);
        assert_eq!(expected, bincode::deserialize(&expected_bytes_with_size_encoding[..])?);

        Ok(())
    }
}