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/*!
# Validator Options

This crate is used with the [`validators-derive`](https://crates.io/crates/validators-derive) crate and the [`validators`](https://crates.io/crates/validators) crate.
*/

#![no_std]

#[macro_use]
extern crate educe;

#[macro_use]
extern crate enum_ordinalize;

/// Options for validators.
#[derive(Debug, Copy, Clone, PartialEq, Eq, Educe, Ordinalize)]
#[educe(Default)]
pub enum ValidatorOption {
    Must,
    #[educe(Default)]
    Allow,
    NotAllow,
}

impl ValidatorOption {
    #[doc(hidden)]
    #[inline]
    pub const fn new() -> ValidatorOption {
        ValidatorOption::Allow
    }

    #[inline]
    pub fn allow(&self) -> bool {
        match self {
            ValidatorOption::Must => true,
            ValidatorOption::Allow => true,
            ValidatorOption::NotAllow => false,
        }
    }

    #[inline]
    pub fn not_allow(&self) -> bool {
        match self {
            ValidatorOption::Must => false,
            ValidatorOption::Allow => false,
            ValidatorOption::NotAllow => true,
        }
    }

    #[inline]
    pub fn must(&self) -> bool {
        match self {
            ValidatorOption::Must => true,
            ValidatorOption::Allow => false,
            ValidatorOption::NotAllow => false,
        }
    }
}

/// A special kind of options for validators related to the case of characters.
#[derive(Debug, Copy, Clone, PartialEq, Eq, Educe, Ordinalize)]
#[educe(Default)]
pub enum ValidatorCaseOption {
    #[educe(Default)]
    Any,
    Upper,
    Lower,
}

impl ValidatorCaseOption {
    #[doc(hidden)]
    #[inline]
    pub const fn new() -> ValidatorCaseOption {
        ValidatorCaseOption::Any
    }

    #[inline]
    pub fn any(&self) -> bool {
        match self {
            ValidatorCaseOption::Any => true,
            ValidatorCaseOption::Upper => false,
            ValidatorCaseOption::Lower => false,
        }
    }

    #[inline]
    pub fn upper(&self) -> bool {
        match self {
            ValidatorCaseOption::Any => true,
            ValidatorCaseOption::Upper => true,
            ValidatorCaseOption::Lower => false,
        }
    }

    #[inline]
    pub fn lower(&self) -> bool {
        match self {
            ValidatorCaseOption::Any => true,
            ValidatorCaseOption::Upper => false,
            ValidatorCaseOption::Lower => true,
        }
    }
}

/// A special kind of options for validators related to separators.
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum ValidatorSeparatorOption {
    Must(u8),
    Allow(u8),
    NotAllow,
}

impl ValidatorSeparatorOption {
    #[inline]
    pub fn allow(&self) -> Option<u8> {
        match self {
            ValidatorSeparatorOption::Must(e) => Some(*e),
            ValidatorSeparatorOption::Allow(e) => Some(*e),
            ValidatorSeparatorOption::NotAllow => None,
        }
    }

    #[inline]
    pub fn not_allow(&self) -> bool {
        match self {
            ValidatorSeparatorOption::Must(_) => false,
            ValidatorSeparatorOption::Allow(_) => false,
            ValidatorSeparatorOption::NotAllow => true,
        }
    }

    #[inline]
    pub fn must(&self) -> Option<u8> {
        match self {
            ValidatorSeparatorOption::Must(e) => Some(*e),
            ValidatorSeparatorOption::Allow(_) => None,
            ValidatorSeparatorOption::NotAllow => None,
        }
    }
}

/// A special kind of options for validators related to ranges.
#[derive(Debug, Clone, PartialEq, Eq, Educe)]
#[educe(Default)]
pub enum ValidatorRangeOption<T> {
    Inside {
        min: Option<T>,
        max: Option<T>,
    },
    Outside {
        min: Option<T>,
        max: Option<T>,
    },
    #[educe(Default)]
    NotLimited,
}

macro_rules! validator_range_option_impl {
    ($($ty:ident),* $(,)*) => {
        $(
            impl ValidatorRangeOption<$ty> {
                #[doc(hidden)]
                #[inline]
                pub const fn new() -> ValidatorRangeOption<$ty> {
                    ValidatorRangeOption::NotLimited
                }

                #[inline]
                pub fn inside(&self) -> Option<(Option<$ty>, Option<$ty>)> {
                    if let ValidatorRangeOption::Inside {
                        min, max
                    } = self {
                        Some((*min, *max))
                    } else {
                        None
                    }
                }

                #[inline]
                pub fn outside(&self) -> Option<(Option<$ty>, Option<$ty>)> {
                    if let ValidatorRangeOption::Outside {
                        min, max
                    } = self {
                        Some((*min, *max))
                    } else {
                        None
                    }
                }

                #[inline]
                pub fn not_limited(&self) -> bool {
                    if let ValidatorRangeOption::NotLimited = self {
                        true
                    } else {
                        false
                    }
                }
            }
        )*
    }
}

validator_range_option_impl!(
    f32, f64, u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize
);