/// Power amplifier ramp time for FSK, MSK, and LoRa modulation.
///
/// Argument of [`set_ramp_time`][`super::TxParams::set_ramp_time`].
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
#[repr(u8)]
pub enum RampTime {
    /// 10µs
    Micros10 = 0x00,
    /// 20µs
    Micros20 = 0x01,
    /// 40µs
    Micros40 = 0x02,
    /// 80µs
    Micros80 = 0x03,
    /// 200µs
    Micros200 = 0x04,
    /// 800µs
    Micros800 = 0x05,
    /// 1.7ms
    Micros1700 = 0x06,
    /// 3.4ms
    Micros3400 = 0x07,
}

impl From<RampTime> for u8 {
    fn from(rt: RampTime) -> Self {
        rt as u8
    }
}

impl From<RampTime> for core::time::Duration {
    fn from(rt: RampTime) -> Self {
        match rt {
            RampTime::Micros10 => core::time::Duration::from_micros(10),
            RampTime::Micros20 => core::time::Duration::from_micros(20),
            RampTime::Micros40 => core::time::Duration::from_micros(40),
            RampTime::Micros80 => core::time::Duration::from_micros(80),
            RampTime::Micros200 => core::time::Duration::from_micros(200),
            RampTime::Micros800 => core::time::Duration::from_micros(800),
            RampTime::Micros1700 => core::time::Duration::from_micros(1700),
            RampTime::Micros3400 => core::time::Duration::from_micros(3400),
        }
    }
}

impl From<RampTime> for embassy::time::Duration {
    fn from(rt: RampTime) -> Self {
        match rt {
            RampTime::Micros10 => embassy::time::Duration::from_micros(10),
            RampTime::Micros20 => embassy::time::Duration::from_micros(20),
            RampTime::Micros40 => embassy::time::Duration::from_micros(40),
            RampTime::Micros80 => embassy::time::Duration::from_micros(80),
            RampTime::Micros200 => embassy::time::Duration::from_micros(200),
            RampTime::Micros800 => embassy::time::Duration::from_micros(800),
            RampTime::Micros1700 => embassy::time::Duration::from_micros(1700),
            RampTime::Micros3400 => embassy::time::Duration::from_micros(3400),
        }
    }
}
/// Transmit parameters, output power and power amplifier ramp up time.
///
/// Argument of [`set_tx_params`][`super::SubGhz::set_tx_params`].
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct TxParams {
    buf: [u8; 3],
}

impl TxParams {
    /// Optimal power setting for +15dBm output power with the low-power PA.
    ///
    /// This must be used with [`PaConfig::LP_15`](super::PaConfig::LP_15).
    pub const LP_15: TxParams = TxParams::new().set_power(0x0E);

    /// Optimal power setting for +14dBm output power with the low-power PA.
    ///
    /// This must be used with [`PaConfig::LP_14`](super::PaConfig::LP_14).
    pub const LP_14: TxParams = TxParams::new().set_power(0x0E);

    /// Optimal power setting for +10dBm output power with the low-power PA.
    ///
    /// This must be used with [`PaConfig::LP_10`](super::PaConfig::LP_10).
    pub const LP_10: TxParams = TxParams::new().set_power(0x0D);

    /// Optimal power setting for the high-power PA.
    ///
    /// This must be used with one of:
    ///
    /// * [`PaConfig::HP_22`](super::PaConfig::HP_22)
    /// * [`PaConfig::HP_20`](super::PaConfig::HP_20)
    /// * [`PaConfig::HP_17`](super::PaConfig::HP_17)
    /// * [`PaConfig::HP_14`](super::PaConfig::HP_14)
    pub const HP: TxParams = TxParams::new().set_power(0x16);

    /// Create a new `TxParams` struct.
    ///
    /// This is the same as `default`, but in a `const` function.
    ///
    /// # Example
    ///
    /// ```
    /// use stm32wl_hal::subghz::TxParams;
    ///
    /// const TX_PARAMS: TxParams = TxParams::new();
    /// assert_eq!(TX_PARAMS, TxParams::default());
    /// ```
    pub const fn new() -> TxParams {
        TxParams {
            buf: [super::OpCode::SetTxParams as u8, 0x00, 0x00],
        }
    }

    /// Set the output power.
    ///
    /// For low power selected in [`set_pa_config`]:
    ///
    /// * 0x0E: +14 dB
    /// * ...
    /// * 0x00: 0 dB
    /// * ...
    /// * 0xEF: -17 dB
    /// * Others: reserved
    ///
    /// For high power selected in [`set_pa_config`]:
    ///
    /// * 0x16: +22 dB
    /// * ...
    /// * 0x00: 0 dB
    /// * ...
    /// * 0xF7: -9 dB
    /// * Others: reserved
    ///
    /// # Example
    ///
    /// Set the output power to 0 dB.
    ///
    /// ```
    /// use stm32wl_hal::subghz::{RampTime, TxParams};
    ///
    /// const TX_PARAMS: TxParams = TxParams::new().set_power(0x00);
    /// # assert_eq!(TX_PARAMS.as_slice()[1], 0x00);
    /// ```
    ///
    /// [`set_pa_config`]: super::SubGhz::set_pa_config
    #[must_use = "set_power returns a modified TxParams"]
    pub const fn set_power(mut self, power: u8) -> TxParams {
        self.buf[1] = power;
        self
    }

    /// Set the Power amplifier ramp time for FSK, MSK, and LoRa modulation.
    ///
    /// # Example
    ///
    /// Set the ramp time to 200 microseconds.
    ///
    /// ```
    /// use stm32wl_hal::subghz::{RampTime, TxParams};
    ///
    /// const TX_PARAMS: TxParams = TxParams::new().set_ramp_time(RampTime::Micros200);
    /// # assert_eq!(TX_PARAMS.as_slice()[2], 0x04);
    /// ```
    #[must_use = "set_ramp_time returns a modified TxParams"]
    pub const fn set_ramp_time(mut self, rt: RampTime) -> TxParams {
        self.buf[2] = rt as u8;
        self
    }

    /// Extracts a slice containing the packet.
    ///
    /// # Example
    ///
    /// ```
    /// use stm32wl_hal::subghz::{RampTime, TxParams};
    ///
    /// const TX_PARAMS: TxParams = TxParams::new()
    ///     .set_ramp_time(RampTime::Micros80)
    ///     .set_power(0x0E);
    /// assert_eq!(TX_PARAMS.as_slice(), &[0x8E, 0x0E, 0x03]);
    /// ```
    pub const fn as_slice(&self) -> &[u8] {
        &self.buf
    }
}

impl Default for TxParams {
    fn default() -> Self {
        Self::new()
    }
}