use crate::peripherals::EFUSE;

#[cfg_attr(not(feature = "unstable"), allow(dead_code))]
mod fields;
#[instability::unstable]
pub use fields::*;

/// Get status of SPI boot encryption.
#[instability::unstable]
pub fn flash_encryption() -> bool {
    !super::read_field_le::<u8>(SPI_BOOT_CRYPT_CNT)
        .count_ones()
        .is_multiple_of(2)
}

/// Get the multiplier for the timeout value of the RWDT STAGE 0 register.
#[instability::unstable]
pub fn rwdt_multiplier() -> u8 {
    super::read_field_le::<u8>(WDT_DELAY_SEL)
}

/// Get efuse block version
///
/// see <https://github.com/espressif/esp-idf/blob/dc016f5987/components/hal/efuse_hal.c#L27-L30>
#[instability::unstable]
pub fn block_version() -> (u8, u8) {
    // see <https://github.com/espressif/esp-idf/blob/1e76669/components/hal/esp32c61/include/hal/efuse_ll.h#L117-L125>
    // https://github.com/espressif/esp-idf/blob/1e76669/components/efuse/esp32c61/esp_efuse_table.csv#L163
    (
        super::read_field_le::<u8>(BLK_VERSION_MAJOR),
        super::read_field_le::<u8>(BLK_VERSION_MINOR),
    )
}

/// Get version of RTC calibration block
///
/// see <https://github.com/espressif/esp-idf/blob/caf1a18/components/efuse/esp32c61/esp_efuse_rtc_calib.c#L20>
#[instability::unstable]
pub fn rtc_calib_version() -> u8 {
    let (_major, minor) = block_version();
    if minor >= 1 { 1 } else { 0 }
}

/// Returns the major hardware revision
#[instability::unstable]
pub fn major_chip_version() -> u8 {
    super::read_field_le(WAFER_VERSION_MAJOR)
}

/// Returns the minor hardware revision
#[instability::unstable]
pub fn minor_chip_version() -> u8 {
    super::read_field_le(WAFER_VERSION_MINOR)
}

#[derive(Debug, Clone, Copy, strum::FromRepr)]
#[repr(u32)]
pub(crate) enum EfuseBlock {
    Block0,
    Block1,
    Block2,
    Block3,
    Block4,
    Block5,
    Block6,
    Block7,
    Block8,
    Block9,
    Block10,
}

impl EfuseBlock {
    pub(crate) fn address(self) -> *const u32 {
        let efuse = EFUSE::regs();
        match self {
            Self::Block0 => efuse.rd_wr_dis0().as_ptr(),
            Self::Block1 => efuse.rd_mac_sys0().as_ptr(),
            Self::Block2 => efuse.rd_sys_part1_data(0).as_ptr(),
            Self::Block3 => efuse.rd_usr_data(0).as_ptr(),
            Self::Block4 => efuse.rd_key0_data(0).as_ptr(),
            Self::Block5 => efuse.rd_key1_data(0).as_ptr(),
            Self::Block6 => efuse.rd_key2_data(0).as_ptr(),
            Self::Block7 => efuse.rd_key3_data(0).as_ptr(),
            Self::Block8 => efuse.rd_key4_data(0).as_ptr(),
            Self::Block9 => efuse.rd_key5_data(0).as_ptr(),
            Self::Block10 => efuse.rd_sys_part2_data(0).as_ptr(),
        }
    }
}
