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pub use super::BytecodeCircuit;

use crate::{
    bytecode_circuit::{BytecodeCircuitConfig, BytecodeCircuitConfigArgs},
    table::{BytecodeTable, KeccakTable},
    util::{Challenges, SubCircuit, SubCircuitConfig},
};
use eth_types::Field;
use halo2_proofs::{
    circuit::{Layouter, SimpleFloorPlanner},
    plonk::{Circuit, ConstraintSystem, Error},
};
use itertools::Itertools;

impl<F: Field> Circuit<F> for BytecodeCircuit<F> {
    type Config = (BytecodeCircuitConfig<F>, Challenges);
    type FloorPlanner = SimpleFloorPlanner;
    type Params = ();

    fn without_witnesses(&self) -> Self {
        Self::default()
    }

    fn configure(meta: &mut ConstraintSystem<F>) -> Self::Config {
        let bytecode_table = BytecodeTable::construct(meta);
        let keccak_table = KeccakTable::construct(meta);
        let challenges = Challenges::construct(meta);

        let config = {
            let challenges = challenges.exprs(meta);
            BytecodeCircuitConfig::new(
                meta,
                BytecodeCircuitConfigArgs {
                    bytecode_table,
                    keccak_table,
                    challenges,
                },
            )
        };

        (config, challenges)
    }

    fn synthesize(
        &self,
        (config, challenges): Self::Config,
        mut layouter: impl Layouter<F>,
    ) -> Result<(), Error> {
        let challenges = challenges.values(&mut layouter);

        config.keccak_table.dev_load(
            &mut layouter,
            &self
                .bytecodes
                .clone()
                .into_iter()
                .map(|b| b.code())
                .collect_vec(),
            &challenges,
        )?;
        self.synthesize_sub(&config, &challenges, &mut layouter)?;
        Ok(())
    }
}