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pub use header::Header;
pub use header::parse_to_surf_header;
#[allow(warnings)]
pub mod header {
    use std::collections::BTreeMap;
    use surf::{http::headers::HeaderName, Request};
    #[derive(Debug, Clone, Default)]
    pub struct HeaderInfo {
        pub method: String,
        pub url: String,
        pub headers: BTreeMap<Box<str>, Box<str>>,
    }
    impl HeaderInfo {
        fn new(method: String, url: String, headers: BTreeMap<Box<str>, Box<str>>) -> Self {
            Self {
                method,
                url,
                headers,
            }
        }
    }
/// ## parse_to_surf_header
///```rust
///    #[tokio::main]
///async fn main() {
///    use std::collections::BTreeMap;
///    use surf_header::Header;
///    use surf_header::parse_to_surf_header;
///    let h = r##"
///    GET / HTTP/1.1
///    Host: crates.io
///    Upgrade-Insecure-Requests: 1
///    User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.5249.119 Safari/537.36
///    Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
///    Referer: https://crates.io/
///    Accept-Encoding: gzip, deflate
///    Accept-Language: en-US,en;q=0.9
///    Connection: close
///    "##;
///    let info = parse_to_surf_header(h).unwrap();
///    let mut req = surf::get(info.url).build();
///    req.headers(info.headers);
///    let client = surf::Client::new();
///    let mut res = client.send(req).await.unwrap();
///    println!("{:?}",res.body_string().await.unwrap());
///}
///```
    pub fn parse_to_surf_header(header: &str) -> Result<HeaderInfo, Box<dyn std::error::Error>> {
        macro_rules! split_to_vec {
            ($a:expr,$b:expr) => {
                $a.to_string()
                    .split($b)
                    .filter(|s| !s.is_empty())
                    .map(|s| s.to_string().trim().to_owned())
                    .collect::<Vec<String>>()
            };
        }
        let methods = split_to_vec!(header, "\n")
            .first()
            .expect("get method error")
            .to_string()
            .to_owned();
        let method_vec = split_to_vec!(methods, " ");
        let method = method_vec.clone().into_iter().nth(0).unwrap();
        let header_vec = split_to_vec!(header, "\n")
            .into_iter()
            .skip(1)
            .filter(|s| !s.is_empty())
            .map(|s| split_to_vec!(s.to_string().trim().to_owned(), ": "))
            .collect::<Vec<Vec<String>>>();
        let mut header: BTreeMap<Box<str>, Box<str>> = BTreeMap::new();
        for h in header_vec.clone().into_iter() {
            let k = h.clone().into_iter().nth(0).unwrap();
            let v = h.clone().into_iter().nth(1).unwrap();
            header.insert(Box::from(k), Box::from(v));
        }
        let host = header_vec
            .clone()
            .into_iter()
            .filter(|s| s.get(0).unwrap().to_string() == "Host".to_string())
            .map(|s| s.get(1).unwrap().to_string())
            .into_iter()
            .nth(0)
            .unwrap()
            .to_string();
        let forword_path = method_vec.get(1).unwrap().to_string();
        let url = format!("https://{}{}", host, forword_path);
        Ok(HeaderInfo::new(method, url, header))
    }


    pub trait Header {
        /// ## parse_to_surf_header
///```rust
///    #[tokio::main]
///async fn main() {
///    use std::collections::BTreeMap;
///    use surf_header::Header;
///    use surf_header::parse_to_surf_header;
///    let h = r##"
///    GET / HTTP/1.1
///    Host: crates.io
///    Upgrade-Insecure-Requests: 1
///    User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.5249.119 Safari/537.36
///    Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
///    Referer: https://crates.io/
///    Accept-Encoding: gzip, deflate
///    Accept-Language: en-US,en;q=0.9
///    Connection: close
///    "##;
///    let info = parse_to_surf_header(h).unwrap();
///    let mut req = surf::get(info.url).build();
///    req.headers(info.headers);
///    let client = surf::Client::new();
///    let mut res = client.send(req).await.unwrap();
///    println!("{:?}",res.body_string().await.unwrap());
///}
///```
        fn headers(&mut self, headers: BTreeMap<Box<str>, Box<str>>);
    }

    impl Header for Request {
        fn headers(&mut self, headers: BTreeMap<Box<str>, Box<str>>) {
            for (k, v) in headers.iter() {
                self.insert_header(
                    HeaderName::from_string(k.to_string()).unwrap(),
                    &v.to_string(),
                );
            }
        }
    }
}