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use std::str::FromStr;
use std::time::Duration;

use crate::{Error, Monotonic, Timestamp};

#[cfg(feature = "chrono")]
impl FromStr for Timestamp {
    type Err = Error;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        #[cfg(not(feature = "as-float-secs"))]
        if let Ok(v) = s.parse::<u64>() {
            return Ok(v.into());
        }
        #[cfg(feature = "as-float-secs")]
        if let Ok(v) = s.parse::<f64>() {
            return Ok(v.into());
        }
        dateparser::parse(s)
            .map_err(|e| Error::Parse(e.to_string()))?
            .try_into()
    }
}

#[cfg(not(feature = "chrono"))]
impl FromStr for Timestamp {
    type Err = Error;
    #[cfg(not(feature = "as-float-secs"))]
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        Ok(s.parse::<u64>()?.into())
    }
    #[cfg(feature = "as-float-secs")]
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        Ok(s.parse::<f64>()?.into())
    }
}

impl FromStr for Monotonic {
    type Err = Error;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        Ok(s.parse::<u64>()?.into())
    }
}

macro_rules! impl_common_convert {
    ($t: ty) => {
        // Duration
        //
        impl From<Duration> for $t {
            fn from(value: Duration) -> Self {
                Self(value)
            }
        }

        impl From<$t> for Duration {
            fn from(value: $t) -> Self {
                value.0
            }
        }

        // i64

        impl TryFrom<i64> for $t {
            type Error = Error;
            fn try_from(value: i64) -> Result<Self, Self::Error> {
                Ok(Self::from_nanos(u64::try_from(value)?))
            }
        }

        impl TryFrom<$t> for i64 {
            type Error = Error;
            fn try_from(value: $t) -> Result<Self, Self::Error> {
                value.as_nanos().try_into().map_err(Into::into)
            }
        }

        // u64

        impl From<u64> for $t {
            fn from(value: u64) -> Self {
                Self::from_nanos(value)
            }
        }

        impl TryFrom<$t> for u64 {
            type Error = Error;
            fn try_from(value: $t) -> Result<Self, Error> {
                value.as_nanos().try_into().map_err(Into::into)
            }
        }

        // u128

        impl From<$t> for u128 {
            fn from(value: $t) -> Self {
                value.as_nanos()
            }
        }

        impl TryFrom<u128> for $t {
            type Error = Error;
            fn try_from(value: u128) -> Result<Self, Self::Error> {
                Ok(<$t>::from_nanos(value.try_into()?))
            }
        }

        // f32

        impl From<f32> for $t {
            fn from(value: f32) -> Self {
                Self::from_secs_f32(value)
            }
        }

        impl From<$t> for f32 {
            fn from(value: $t) -> Self {
                value.as_secs_f32()
            }
        }

        // f64

        impl From<f64> for $t {
            fn from(value: f64) -> Self {
                Self::from_secs_f64(value)
            }
        }

        impl From<$t> for f64 {
            fn from(value: $t) -> Self {
                value.as_secs_f64()
            }
        }
    };
}

impl_common_convert!(Timestamp);
impl_common_convert!(Monotonic);