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// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use std::ffi::CStr;
use std::mem;

use ffi;
use glib::translate::*;

#[repr(C)]
pub struct SDPAttribute(pub(crate) ffi::GstSDPAttribute);

impl SDPAttribute {
    pub fn new(key: &str, value: &str) -> Result<Self, ()> {
        assert_initialized_main_thread!();
        unsafe {
            let mut attr = mem::zeroed();
            let result =
                ffi::gst_sdp_attribute_set(&mut attr, key.to_glib_none().0, value.to_glib_none().0);
            match result {
                ffi::GST_SDP_OK => Ok(SDPAttribute(attr)),
                _ => Err(()),
            }
        }
    }

    pub fn key(&self) -> &str {
        unsafe { CStr::from_ptr(self.0.key).to_str().unwrap() }
    }

    pub fn value(&self) -> &str {
        unsafe { CStr::from_ptr(self.0.value).to_str().unwrap() }
    }
}

impl Drop for SDPAttribute {
    fn drop(&mut self) {
        unsafe {
            ffi::gst_sdp_attribute_clear(&mut self.0);
        }
    }
}