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// Take a look at the license at the top of the repository in the LICENSE file.

use crate::PluginFeature;
use crate::Rank;

use glib::prelude::*;
use glib::translate::{from_glib, FromGlibPtrFull, IntoGlib, ToGlibPtr};

pub trait PluginFeatureExtManual: Sized + 'static {
    #[doc(alias = "get_rank")]
    #[doc(alias = "gst_plugin_feature_get_rank")]
    fn rank(&self) -> Rank;
    #[doc(alias = "gst_plugin_feature_set_rank")]
    fn set_rank(&self, rank: Rank);
    #[doc(alias = "gst_plugin_feature_load")]
    fn load(&self) -> Result<Self, glib::BoolError>;
}

impl<O: IsA<PluginFeature>> PluginFeatureExtManual for O {
    fn rank(&self) -> Rank {
        unsafe {
            let rank = ffi::gst_plugin_feature_get_rank(self.as_ref().to_glib_none().0);
            from_glib(rank as i32)
        }
    }

    fn set_rank(&self, rank: Rank) {
        unsafe {
            ffi::gst_plugin_feature_set_rank(
                self.as_ref().to_glib_none().0,
                rank.into_glib() as u32,
            );
        }
    }

    fn load(&self) -> Result<Self, glib::BoolError> {
        unsafe {
            let loaded = Option::<PluginFeature>::from_glib_full(ffi::gst_plugin_feature_load(
                self.as_ref().to_glib_none().0,
            ))
            .ok_or_else(|| glib::bool_error!("Failed to load plugin feature"))?;
            Ok(loaded.unsafe_cast())
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_load() {
        crate::init().unwrap();

        let factory = crate::ElementFactory::find("identity").unwrap();
        let loaded = factory.load().unwrap();
        assert_eq!(factory.type_(), loaded.type_());
        let _element = loaded.create(None).unwrap();
    }
}