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

use std::ffi::CStr;

use glib::translate::*;

use crate::{
    DeviceProviderFactory, ELEMENT_METADATA_AUTHOR, ELEMENT_METADATA_DESCRIPTION,
    ELEMENT_METADATA_DOC_URI, ELEMENT_METADATA_ICON_NAME, ELEMENT_METADATA_KLASS,
    ELEMENT_METADATA_LONGNAME,
};

impl DeviceProviderFactory {
    /// Get a list of factories with a rank greater or equal to `minrank`.
    /// The list of factories is returned by decreasing rank.
    /// ## `minrank`
    /// Minimum rank
    ///
    /// # Returns
    ///
    ///
    /// a `GList` of [`DeviceProviderFactory`][crate::DeviceProviderFactory] device providers. Use
    /// `gst_plugin_feature_list_free()` after usage.
    #[doc(alias = "gst_device_provider_factory_list_get_device_providers")]
    pub fn factories(minrank: crate::Rank) -> glib::List<DeviceProviderFactory> {
        assert_initialized_main_thread!();
        unsafe {
            FromGlibPtrContainer::from_glib_full(
                ffi::gst_device_provider_factory_list_get_device_providers(minrank.into_glib()),
            )
        }
    }

    /// Get the metadata on `self` with `key`.
    /// ## `key`
    /// a key
    ///
    /// # Returns
    ///
    /// the metadata with `key` on `self` or [`None`]
    /// when there was no metadata with the given `key`.
    #[doc(alias = "gst_device_provider_factory_get_metadata")]
    #[doc(alias = "get_metadata")]
    pub fn metadata(&self, key: &str) -> Option<&str> {
        unsafe {
            let ptr = ffi::gst_device_provider_factory_get_metadata(
                self.to_glib_none().0,
                key.to_glib_none().0,
            );

            if ptr.is_null() {
                None
            } else {
                Some(CStr::from_ptr(ptr).to_str().unwrap())
            }
        }
    }

    #[doc(alias = "get_longname")]
    #[doc(alias = "gst_device_provider_factory_get_longname")]
    pub fn longname(&self) -> &str {
        self.metadata(ELEMENT_METADATA_LONGNAME).unwrap()
    }

    #[doc(alias = "get_klass")]
    #[doc(alias = "gst_device_provider_factory_get_klass")]
    pub fn klass(&self) -> &str {
        self.metadata(ELEMENT_METADATA_KLASS).unwrap()
    }

    #[doc(alias = "get_description")]
    #[doc(alias = "gst_device_provider_factory_get_description")]
    pub fn description(&self) -> &str {
        self.metadata(ELEMENT_METADATA_DESCRIPTION).unwrap()
    }

    #[doc(alias = "get_author")]
    #[doc(alias = "gst_device_provider_factory_get_author")]
    pub fn author(&self) -> &str {
        self.metadata(ELEMENT_METADATA_AUTHOR).unwrap()
    }

    #[doc(alias = "get_documentation_uri")]
    #[doc(alias = "gst_device_provider_factory_get_documentation_uri")]
    pub fn documentation_uri(&self) -> Option<&str> {
        self.metadata(ELEMENT_METADATA_DOC_URI)
    }

    #[doc(alias = "get_icon_name")]
    #[doc(alias = "gst_device_provider_factory_get_icon_name")]
    pub fn icon_name(&self) -> Option<&str> {
        self.metadata(ELEMENT_METADATA_ICON_NAME)
    }
}