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/*
 * File: silencer.rs
 * Project: operation
 * Created Date: 08/01/2023
 * Author: Shun Suzuki
 * -----
 * Last Modified: 21/11/2023
 * Modified By: Shun Suzuki (suzuki@hapis.k.u-tokyo.ac.jp)
 * -----
 * Copyright (c) 2023 Shun Suzuki. All rights reserved.
 *
 */

use std::collections::HashMap;

use crate::{
    error::AUTDInternalError,
    geometry::{Device, Geometry},
    operation::{Operation, TypeTag},
};

pub struct ConfigSilencerOp {
    remains: HashMap<usize, usize>,
    step_intensity: u16,
    step_phase: u16,
}

impl ConfigSilencerOp {
    pub fn new(step_intensity: u16, step_phase: u16) -> Self {
        Self {
            remains: Default::default(),
            step_intensity,
            step_phase,
        }
    }
}

impl Operation for ConfigSilencerOp {
    fn pack(&mut self, device: &Device, tx: &mut [u8]) -> Result<usize, AUTDInternalError> {
        assert_eq!(self.remains[&device.idx()], 1);
        tx[0] = TypeTag::Silencer as u8;
        tx[2] = (self.step_intensity & 0xFF) as u8;
        tx[3] = (self.step_intensity >> 8) as u8;
        tx[4] = (self.step_phase & 0xFF) as u8;
        tx[5] = (self.step_phase >> 8) as u8;
        Ok(6)
    }

    fn required_size(&self, _: &Device) -> usize {
        6
    }

    fn init(&mut self, geometry: &Geometry) -> Result<(), AUTDInternalError> {
        self.remains = geometry.devices().map(|device| (device.idx(), 1)).collect();
        Ok(())
    }

    fn remains(&self, device: &Device) -> usize {
        self.remains[&device.idx()]
    }

    fn commit(&mut self, device: &Device) {
        self.remains.insert(device.idx(), 0);
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::geometry::tests::create_geometry;

    const NUM_TRANS_IN_UNIT: usize = 249;
    const NUM_DEVICE: usize = 10;

    #[test]
    fn silencer_op() {
        let geometry = create_geometry(NUM_DEVICE, NUM_TRANS_IN_UNIT);

        let mut tx = [0x00u8; 6 * NUM_DEVICE];

        let mut op = ConfigSilencerOp::new(0x1234, 0x5678);

        assert!(op.init(&geometry).is_ok());

        geometry
            .devices()
            .for_each(|dev| assert_eq!(op.required_size(dev), 6));

        geometry
            .devices()
            .for_each(|dev| assert_eq!(op.remains(dev), 1));

        geometry.devices().for_each(|dev| {
            assert!(op.pack(dev, &mut tx[dev.idx() * 6..]).is_ok());
            op.commit(dev);
        });

        geometry
            .devices()
            .for_each(|dev| assert_eq!(op.remains(dev), 0));

        geometry.devices().for_each(|dev| {
            assert_eq!(tx[dev.idx() * 6], TypeTag::Silencer as u8);
            assert_eq!(tx[dev.idx() * 6 + 1], 0);
            assert_eq!(tx[dev.idx() * 6 + 2], 0x34);
            assert_eq!(tx[dev.idx() * 6 + 3], 0x12);
            assert_eq!(tx[dev.idx() * 6 + 4], 0x78);
            assert_eq!(tx[dev.idx() * 6 + 5], 0x56);
        });
    }
}