/*
 * Copyright (c) 2020-2021 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

use std::ops::Mul;

use crate::{IQSample, Scalar};
use super::Signal;
use super::Gain;

pub struct Mixer<T: Signal, U: Signal> {
    rate: u64,
    /* TODO: freq */
    lhs: T,
    rhs: U,
}

impl<T: Signal, U: Signal> Mixer<T, U> {
    pub fn new(lhs: T, rhs: U) -> Mixer<T, U> {
        if lhs.sample_rate() != rhs.sample_rate() {
            panic!("sample rate mismatch: {} {}", lhs.sample_rate(), rhs.sample_rate());
        }

        Mixer {
            rate: lhs.sample_rate(),
            lhs: lhs,
            rhs: rhs,
        }
    }
}

impl<T: Signal, U: Signal> Signal for Mixer<T, U> {
    fn sample_rate(&self) -> u64 {
        self.rate
    }

    fn sample_size(&self) -> usize {
        std::mem::size_of::<IQSample>()
    }

    fn sample_shift(&self) -> u64 {
        panic!("TODO");
    }

    fn freq(&self) -> u64 {
        panic!("TODO");
    }
}

impl<T: Signal, U: Signal> Iterator for Mixer<T, U> {
    type Item = IQSample;

    fn next(&mut self) -> Option<Self::Item> {
        Some(self.lhs.next()? * self.rhs.next()?)
    }
}

include!("math.rs");
signal_math!(Mixer<Signal, Signal>);