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// Copyright 2019 YechaoLi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::{borrow::Cow, net::IpAddr, str::FromStr};

#[derive(Debug, Clone)]
pub struct Ip;

impl Ip {
    pub fn validate<'a, T>(&self, val: T) -> bool
    where
        T: Into<Cow<'a, str>>,
    {
        IpAddr::from_str(val.into().as_ref()).is_ok()
    }
}

#[cfg(feature = "proc")]
impl quote::ToTokens for Ip {
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        use quote::quote;

        tokens.extend(quote! {
            (::prove::ip::Ip)
        });
    }
}

#[derive(Debug, Clone)]
pub struct IpV4;

impl IpV4 {
    pub fn validate<'a, T>(&self, val: T) -> bool
    where
        T: Into<Cow<'a, str>>,
    {
        match IpAddr::from_str(val.into().as_ref()) {
            Ok(i) => match i {
                IpAddr::V4(_) => true,
                _ => false,
            },
            _ => false,
        }
    }
}

#[cfg(feature = "proc")]
impl quote::ToTokens for IpV4 {
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        use quote::quote;

        tokens.extend(quote! {
            (::prove::ip::IpV4)
        });
    }
}

#[derive(Debug, Clone)]
pub struct IpV6;

impl IpV6 {
    pub fn validate<'a, T>(&self, val: T) -> bool
    where
        T: Into<Cow<'a, str>>,
    {
        match IpAddr::from_str(val.into().as_ref()) {
            Ok(i) => match i {
                IpAddr::V6(_) => true,
                _ => false,
            },
            _ => false,
        }
    }
}

#[cfg(feature = "proc")]
impl quote::ToTokens for IpV6 {
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        use quote::quote;

        tokens.extend(quote! {
            (::prove::ip::IpV6)
        });
    }
}