use super::*;

/// Specialized expressions for [`Series`] with dates/datetimes.
pub struct DateLikeNameSpace(pub(crate) Expr);

impl DateLikeNameSpace {
    /// Add a given number of business days.
    #[cfg(feature = "business")]
    pub fn add_business_days(
        self,
        n: Expr,
        week_mask: [bool; 7],
        holidays: Vec<i32>,
        roll: Roll,
    ) -> Expr {
        self.0.map_many_private(
            FunctionExpr::Business(BusinessFunction::AddBusinessDay {
                week_mask,
                holidays,
                roll,
            }),
            &[n],
            false,
            None,
        )
    }

    /// Convert from Date/Time/Datetime into String with the given format.
    /// See [chrono strftime/strptime](https://docs.rs/chrono/0.4.19/chrono/format/strftime/index.html).
    pub fn to_string(self, format: &str) -> Expr {
        let format = format.to_string();
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::ToString(
                format,
            )))
    }

    /// Convert from Date/Time/Datetime into String with the given format.
    /// See [chrono strftime/strptime](https://docs.rs/chrono/0.4.19/chrono/format/strftime/index.html).
    ///
    /// Alias for `to_string`.
    pub fn strftime(self, format: &str) -> Expr {
        self.to_string(format)
    }

    /// Change the underlying [`TimeUnit`]. And update the data accordingly.
    pub fn cast_time_unit(self, tu: TimeUnit) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::CastTimeUnit(
                tu,
            )))
    }

    /// Change the underlying [`TimeUnit`] of the [`Series`]. This does not modify the data.
    pub fn with_time_unit(self, tu: TimeUnit) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::WithTimeUnit(
                tu,
            )))
    }

    /// Change the underlying [`TimeZone`] of the [`Series`]. This does not modify the data.
    #[cfg(feature = "timezones")]
    pub fn convert_time_zone(self, time_zone: TimeZone) -> Expr {
        self.0.map_private(FunctionExpr::TemporalExpr(
            TemporalFunction::ConvertTimeZone(time_zone),
        ))
    }

    /// Get the millennium of a Date/Datetime
    pub fn millennium(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Millennium))
    }

    /// Get the century of a Date/Datetime
    pub fn century(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Century))
    }

    /// Get the year of a Date/Datetime
    pub fn year(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Year))
    }

    // Compute whether the year of a Date/Datetime is a leap year.
    pub fn is_leap_year(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::IsLeapYear))
    }

    /// Get the iso-year of a Date/Datetime.
    /// This may not correspond with a calendar year.
    pub fn iso_year(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::IsoYear))
    }

    /// Get the month of a Date/Datetime.
    pub fn month(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Month))
    }

    /// Extract quarter from underlying NaiveDateTime representation.
    /// Quarters range from 1 to 4.
    pub fn quarter(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Quarter))
    }

    /// Extract the week from the underlying Date representation.
    /// Can be performed on Date and Datetime
    ///
    /// Returns the ISO week number starting from 1.
    /// The return value ranges from 1 to 53. (The last week of year differs by years.)
    pub fn week(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Week))
    }

    /// Extract the ISO week day from the underlying Date representation.
    /// Can be performed on Date and Datetime.
    ///
    /// Returns the weekday number where monday = 1 and sunday = 7
    pub fn weekday(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::WeekDay))
    }

    /// Get the month of a Date/Datetime.
    pub fn day(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Day))
    }

    /// Get the ordinal_day of a Date/Datetime.
    pub fn ordinal_day(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::OrdinalDay))
    }

    /// Get the (local) time of a Date/Datetime/Time.
    pub fn time(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Time))
    }

    /// Get the (local) date of a Date/Datetime.
    pub fn date(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Date))
    }

    /// Get the (local) datetime of a Datetime.
    pub fn datetime(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Datetime))
    }

    /// Get the hour of a Datetime/Time64.
    pub fn hour(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Hour))
    }

    /// Get the minute of a Datetime/Time64.
    pub fn minute(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Minute))
    }

    /// Get the second of a Datetime/Time64.
    pub fn second(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Second))
    }

    /// Get the millisecond of a Time64 (scaled from nanosecs).
    pub fn millisecond(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Millisecond))
    }

    /// Get the microsecond of a Time64 (scaled from nanosecs).
    pub fn microsecond(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Microsecond))
    }

    /// Get the nanosecond part of a Time64.
    pub fn nanosecond(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::Nanosecond))
    }

    /// Return the timestamp (UNIX epoch) of a Datetime/Date.
    pub fn timestamp(self, tu: TimeUnit) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::TimeStamp(tu)))
    }

    /// Truncate the Datetime/Date range into buckets.
    pub fn truncate(self, every: Expr) -> Expr {
        self.0.map_many_private(
            FunctionExpr::TemporalExpr(TemporalFunction::Truncate),
            &[every],
            false,
            None,
        )
    }

    /// Roll backward to the first day of the month.
    #[cfg(feature = "month_start")]
    pub fn month_start(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::MonthStart))
    }

    /// Roll forward to the last day of the month.
    #[cfg(feature = "month_end")]
    pub fn month_end(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::MonthEnd))
    }

    /// Get the base offset from UTC.
    #[cfg(feature = "timezones")]
    pub fn base_utc_offset(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::BaseUtcOffset))
    }

    /// Get the additional offset from UTC currently in effect (usually due to daylight saving time).
    #[cfg(feature = "timezones")]
    pub fn dst_offset(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::DSTOffset))
    }

    /// Round the Datetime/Date range into buckets.
    pub fn round(self, every: Expr) -> Expr {
        self.0.map_many_private(
            FunctionExpr::TemporalExpr(TemporalFunction::Round),
            &[every],
            false,
            None,
        )
    }

    /// Offset this `Date/Datetime` by a given offset [`Duration`].
    /// This will take leap years/ months into account.
    #[cfg(feature = "offset_by")]
    pub fn offset_by(self, by: Expr) -> Expr {
        self.0.map_many_private(
            FunctionExpr::TemporalExpr(TemporalFunction::OffsetBy),
            &[by],
            false,
            None,
        )
    }

    #[cfg(feature = "timezones")]
    pub fn replace_time_zone(
        self,
        time_zone: Option<TimeZone>,
        ambiguous: Expr,
        non_existent: NonExistent,
    ) -> Expr {
        self.0.map_many_private(
            FunctionExpr::TemporalExpr(TemporalFunction::ReplaceTimeZone(time_zone, non_existent)),
            &[ambiguous],
            false,
            None,
        )
    }

    /// Combine an existing Date/Datetime with a Time, creating a new Datetime value.
    pub fn combine(self, time: Expr, tu: TimeUnit) -> Expr {
        self.0.map_many_private(
            FunctionExpr::TemporalExpr(TemporalFunction::Combine(tu)),
            &[time],
            false,
            None,
        )
    }

    /// Express a Duration in terms of its total number of integer days.
    pub fn total_days(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::TotalDays))
    }

    /// Express a Duration in terms of its total number of integer hours.
    pub fn total_hours(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::TotalHours))
    }

    /// Express a Duration in terms of its total number of integer minutes.
    pub fn total_minutes(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::TotalMinutes))
    }

    /// Express a Duration in terms of its total number of integer seconds.
    pub fn total_seconds(self) -> Expr {
        self.0
            .map_private(FunctionExpr::TemporalExpr(TemporalFunction::TotalSeconds))
    }

    /// Express a Duration in terms of its total number of milliseconds.
    pub fn total_milliseconds(self) -> Expr {
        self.0.map_private(FunctionExpr::TemporalExpr(
            TemporalFunction::TotalMilliseconds,
        ))
    }

    /// Express a Duration in terms of its total number of microseconds.
    pub fn total_microseconds(self) -> Expr {
        self.0.map_private(FunctionExpr::TemporalExpr(
            TemporalFunction::TotalMicroseconds,
        ))
    }

    /// Express a Duration in terms of its total number of nanoseconds.
    pub fn total_nanoseconds(self) -> Expr {
        self.0.map_private(FunctionExpr::TemporalExpr(
            TemporalFunction::TotalNanoseconds,
        ))
    }
}
