use ads1x1x::{
    ComparatorLatching, ComparatorMode, ComparatorPolarity, ComparatorQueue, FullScaleRange,
};
use embedded_hal_mock::i2c::Transaction as I2cTrans;

mod common;
use crate::common::{
    destroy_ads1014, new_ads1014, BitFlags as BF, Config, Register, DEVICE_ADDRESS as DEV_ADDR,
};

macro_rules! set_value_test {
    ($name:ident, $method:ident, $value:expr, $reg:ident, $msb:expr, $lsb:expr) => {
        #[test]
        fn $name() {
            let transactions = [I2cTrans::write(DEV_ADDR, vec![Register::$reg, $msb, $lsb])];
            let mut dev = new_ads1014(&transactions);
            dev.$method($value).unwrap();
            destroy_ads1014(dev);
        }
    };
}

macro_rules! config_test {
    ($name:ident, $method:ident, $value:expr, $config:expr) => {
        set_value_test!($name, $method, $value, CONFIG, $config.msb(), $config.lsb());
    };
}

mod can_set_comparator_thresholds {
    use super::*;
    set_value_test!(low, set_low_threshold_raw, 2047, LOW_TH, 0x7F, 0xF0);
    set_value_test!(high, set_high_threshold_raw, 2047, HIGH_TH, 0x7F, 0xF0);
}

mod can_set_comparator_mode {
    use super::*;
    config_test!(
        traditional,
        set_comparator_mode,
        ComparatorMode::Traditional,
        Config::default().with_low(BF::COMP_MODE)
    );
    config_test!(
        window,
        set_comparator_mode,
        ComparatorMode::Window,
        Config::default().with_high(BF::COMP_MODE)
    );
}

mod can_set_comparator_polarity {
    use super::*;
    config_test!(
        low,
        set_comparator_polarity,
        ComparatorPolarity::ActiveLow,
        Config::default().with_low(BF::COMP_POL)
    );
    config_test!(
        high,
        set_comparator_polarity,
        ComparatorPolarity::ActiveHigh,
        Config::default().with_high(BF::COMP_POL)
    );
}

mod can_set_comparator_latching {
    use super::*;
    config_test!(
        non,
        set_comparator_latching,
        ComparatorLatching::Nonlatching,
        Config::default().with_low(BF::COMP_LAT)
    );
    config_test!(
        lat,
        set_comparator_latching,
        ComparatorLatching::Latching,
        Config::default().with_high(BF::COMP_LAT)
    );
}

#[test]
fn can_disable_comparator() {
    let config = Config::default()
        .with_high(BF::COMP_QUE1)
        .with_high(BF::COMP_QUE0);
    let transactions = [I2cTrans::write(
        DEV_ADDR,
        vec![Register::CONFIG, config.msb(), config.lsb()],
    )];
    let mut dev = new_ads1014(&transactions);
    dev.disable_comparator().unwrap();
    destroy_ads1014(dev);
}

mod can_set_comparator_queue {
    use super::*;
    config_test!(
        one,
        set_comparator_queue,
        ComparatorQueue::One,
        Config::default()
            .with_low(BF::COMP_QUE1)
            .with_low(BF::COMP_QUE0)
    );
    config_test!(
        two,
        set_comparator_queue,
        ComparatorQueue::Two,
        Config::default()
            .with_low(BF::COMP_QUE1)
            .with_high(BF::COMP_QUE0)
    );
    config_test!(
        four,
        set_comparator_queue,
        ComparatorQueue::Four,
        Config::default()
            .with_high(BF::COMP_QUE1)
            .with_low(BF::COMP_QUE0)
    );
}

#[test]
fn can_use_alert_rdy_pin_as_rdy_does_not_disable_comparator_if_already_disabled() {
    let transactions = [
        I2cTrans::write(DEV_ADDR, vec![Register::HIGH_TH, 0b1000_0000, 0]),
        I2cTrans::write(DEV_ADDR, vec![Register::LOW_TH, 0, 0]),
    ];
    let mut dev = new_ads1014(&transactions);
    dev.use_alert_rdy_pin_as_ready().unwrap();
    destroy_ads1014(dev);
}

#[test]
fn can_use_alert_rdy_pin_as_rdy_disabled_comparator() {
    let config = Config::default()
        .with_low(BF::COMP_QUE1)
        .with_low(BF::COMP_QUE0);
    let config_disabled_comp = Config::default()
        .with_high(BF::COMP_QUE1)
        .with_high(BF::COMP_QUE0);
    let transactions = [
        I2cTrans::write(DEV_ADDR, vec![Register::CONFIG, config.msb(), config.lsb()]),
        I2cTrans::write(
            DEV_ADDR,
            vec![
                Register::CONFIG,
                config_disabled_comp.msb(),
                config_disabled_comp.lsb(),
            ],
        ),
        I2cTrans::write(DEV_ADDR, vec![Register::HIGH_TH, 0b1000_0000, 0]),
        I2cTrans::write(DEV_ADDR, vec![Register::LOW_TH, 0, 0]),
    ];
    let mut dev = new_ads1014(&transactions);
    dev.set_comparator_queue(ComparatorQueue::One).unwrap();
    dev.use_alert_rdy_pin_as_ready().unwrap();
    destroy_ads1014(dev);
}

mod can_set_full_scale_range {
    use super::*;
    config_test!(
        fsr6,
        set_full_scale_range,
        FullScaleRange::Within6_144V,
        Config::default()
            .with_low(BF::PGA2)
            .with_low(BF::PGA1)
            .with_low(BF::PGA0)
    );
    config_test!(
        fsr4,
        set_full_scale_range,
        FullScaleRange::Within4_096V,
        Config::default()
            .with_low(BF::PGA2)
            .with_low(BF::PGA1)
            .with_high(BF::PGA0)
    );
    config_test!(
        fsr2,
        set_full_scale_range,
        FullScaleRange::Within2_048V,
        Config::default()
            .with_low(BF::PGA2)
            .with_high(BF::PGA1)
            .with_low(BF::PGA0)
    );
    config_test!(
        fsr1,
        set_full_scale_range,
        FullScaleRange::Within1_024V,
        Config::default()
            .with_low(BF::PGA2)
            .with_high(BF::PGA1)
            .with_high(BF::PGA0)
    );
    config_test!(
        fsr0_5,
        set_full_scale_range,
        FullScaleRange::Within0_512V,
        Config::default()
            .with_high(BF::PGA2)
            .with_low(BF::PGA1)
            .with_low(BF::PGA0)
    );
    config_test!(
        fsr0_2,
        set_full_scale_range,
        FullScaleRange::Within0_256V,
        Config::default()
            .with_high(BF::PGA2)
            .with_low(BF::PGA1)
            .with_high(BF::PGA0)
    );
}