use std::fmt;
use native_tls;

/// Represent an X509 certificate.
pub struct Certificate(native_tls::Certificate);

impl Certificate {
    /// Create a `Certificate` from a binary DER encoded certificate
    ///
    /// # Examples
    ///
    /// ```
    /// # use std::fs::File;
    /// # use std::io::Read;
    /// # fn cert() -> Result<(), Box<std::error::Error>> {
    /// let mut buf = Vec::new();
    /// File::open("my_cert.der")?
    ///     .read_to_end(&mut buf)?;
    /// let cert = reqwest::Certificate::from_der(&buf)?;
    /// # drop(cert);
    /// # Ok(())
    /// # }
    /// ```
    ///
    /// # Errors
    ///
    /// If the provided buffer is not valid DER, an error will be returned.
    pub fn from_der(der: &[u8]) -> ::Result<Certificate> {
        let inner = try_!(native_tls::Certificate::from_der(der));
        Ok(Certificate(inner))
    }


    /// Create a `Certificate` from a PEM encoded certificate
    ///
    /// # Examples
    ///
    /// ```
    /// # use std::fs::File;
    /// # use std::io::Read;
    /// # fn cert() -> Result<(), Box<std::error::Error>> {
    /// let mut buf = Vec::new();
    /// File::open("my_cert.pem")?
    ///     .read_to_end(&mut buf)?;
    /// let cert = reqwest::Certificate::from_pem(&buf)?;
    /// # drop(cert);
    /// # Ok(())
    /// # }
    /// ```
    ///
    /// # Errors
    ///
    /// If the provided buffer is not valid PEM, an error will be returned.
    pub fn from_pem(der: &[u8]) -> ::Result<Certificate> {
        let inner = try_!(native_tls::Certificate::from_pem(der));
        Ok(Certificate(inner))
    }

    pub(crate) fn cert(self) -> native_tls::Certificate {
        self.0
    }

}

impl fmt::Debug for Certificate {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.debug_struct("Certificate")
            .finish()
    }
}


/// Represent a private key and X509 cert as a client certificate.
pub struct Identity(native_tls::Identity);

impl Identity {
    /// Parses a DER-formatted PKCS #12 archive, using the specified password to decrypt the key.
    ///
    /// The archive should contain a leaf certificate and its private key, as well any intermediate
    /// certificates that allow clients to build a chain to a trusted root.
    /// The chain certificates should be in order from the leaf certificate towards the root.
    ///
    /// PKCS #12 archives typically have the file extension `.p12` or `.pfx`, and can be created
    /// with the OpenSSL `pkcs12` tool:
    ///
    /// ```bash
    /// openssl pkcs12 -export -out identity.pfx -inkey key.pem -in cert.pem -certfile chain_certs.pem
    /// ```
    ///
    /// # Examples
    ///
    /// ```
    /// # use std::fs::File;
    /// # use std::io::Read;
    /// # fn pkcs12() -> Result<(), Box<std::error::Error>> {
    /// let mut buf = Vec::new();
    /// File::open("my-ident.pfx")?
    ///     .read_to_end(&mut buf)?;
    /// let pkcs12 = reqwest::Identity::from_pkcs12_der(&buf, "my-privkey-password")?;
    /// # drop(pkcs12);
    /// # Ok(())
    /// # }
    /// ```
    ///
    /// # Errors
    ///
    /// If the provided buffer is not valid DER, an error will be returned.
    pub fn from_pkcs12_der(der: &[u8], password: &str) -> ::Result<Identity> {
        let inner = try_!(native_tls::Identity::from_pkcs12(der, password));
        Ok(Identity(inner))
    }

    pub(crate) fn pkcs12(self) -> native_tls::Identity {
        self.0
    }
}

impl fmt::Debug for Identity {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.debug_struct("Identity")
            .finish()
    }
}