use crate::hal::Box;
use crate::fat_error::FatResult;
use async_trait::async_trait;
use bincode::{Decode, Encode};
use chrono::{DateTime, Utc};
use ds323x::ic::DS3231;
use ds323x::interface::I2cInterface;
use ds323x::{DateTimeAccess, Ds323x};
use eeprom24x::addr_size::TwoBytes;
use eeprom24x::page_size::B32;
use eeprom24x::unique_serial::No;
use embassy_embedded_hal::shared_bus::blocking::i2c::I2cDevice;
use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
use embedded_storage::{ReadStorage, Storage};
use esp_hal::delay::Delay;
use esp_hal::i2c::master::I2c;
use esp_hal::Blocking;
use serde::{Deserialize, Serialize};

pub const X25: crc::Crc<u16> = crc::Crc::<u16>::new(&crc::CRC_16_IBM_SDLC);
pub const EEPROM_PAGE: usize = 32;
//
#[async_trait(?Send)]
pub trait RTCModuleInteraction {
    async fn get_rtc_time(&mut self) -> FatResult<DateTime<Utc>>;
    async fn set_rtc_time(&mut self, time: &DateTime<Utc>) -> FatResult<()>;

    fn write(&mut self, offset: u32, data: &[u8]) -> FatResult<()>;
    fn read(&mut self, offset:u32, data: &mut [u8]) -> FatResult<()>;
}

#[derive(Serialize, Deserialize, PartialEq, Debug, Default, Encode, Decode)]
pub struct BackupHeader {
    pub timestamp: i64,
    pub(crate) crc16: u16,
    pub size: u16,
}
//
pub struct DS3231Module {
    pub(crate) rtc: Ds323x<
        I2cInterface<I2cDevice<'static, CriticalSectionRawMutex, I2c<'static, Blocking>>>,
        DS3231,
    >,

    pub storage: eeprom24x::Storage<
        I2cDevice<'static, CriticalSectionRawMutex, I2c<'static, Blocking>>,
        B32,
        TwoBytes,
        No,
        Delay,
    >,
}

#[async_trait(?Send)]
impl RTCModuleInteraction for DS3231Module {
    async fn get_rtc_time(&mut self) -> FatResult<DateTime<Utc>> {
        Ok(self.rtc.datetime()?.and_utc())
    }

    async fn set_rtc_time(&mut self, time: &DateTime<Utc>) -> FatResult<()> {
        let naive_time = time.naive_utc();
        Ok(self.rtc.set_datetime(&naive_time)?)
    }

    fn write(&mut self, offset: u32, data: &[u8]) -> FatResult<()> {
        self.storage.write(offset, data)?;
        Ok(())
    }

    fn read(&mut self, offset:u32, data: &mut [u8]) -> FatResult<()> {
        self.storage.read(offset, data)?;
        Ok(())
    }
}