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// Copyright (C) 2017 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 glib::object::Cast;
use glib::object::IsA;
use glib::translate::*;
use gst_sys;
use GhostPad;
use Object;
use Pad;
use PadMode;
use PadTemplate;

impl GhostPad {
    /// Create a new ghostpad with `target` as the target. The direction will be taken
    /// from the target pad. `target` must be unlinked.
    ///
    /// Will ref the target.
    /// ## `name`
    /// the name of the new pad, or `None` to assign a default name
    /// ## `target`
    /// the pad to ghost.
    ///
    /// # Returns
    ///
    /// a new `Pad`, or `None` in
    /// case of an error.
    pub fn new<Q: IsA<Pad>>(name: Option<&str>, target: &Q) -> Result<GhostPad, glib::BoolError> {
        skip_assert_initialized!();
        let name = name.to_glib_none();
        unsafe {
            Option::<Pad>::from_glib_none(gst_sys::gst_ghost_pad_new(
                name.0,
                target.as_ref().to_glib_none().0,
            ))
            .map(|o| Cast::unsafe_cast(o))
            .ok_or_else(|| glib_bool_error!("Failed to create GhostPad"))
        }
    }

    /// Create a new ghostpad with `target` as the target. The direction will be taken
    /// from the target pad. The template used on the ghostpad will be `template`.
    ///
    /// Will ref the target.
    /// ## `name`
    /// the name of the new pad, or `None` to assign a default name.
    /// ## `target`
    /// the pad to ghost.
    /// ## `templ`
    /// the `PadTemplate` to use on the ghostpad.
    ///
    /// # Returns
    ///
    /// a new `Pad`, or `None` in
    /// case of an error.
    pub fn new_from_template<Q: IsA<Pad>>(
        name: Option<&str>,
        target: &Q,
        templ: &PadTemplate,
    ) -> Result<GhostPad, glib::BoolError> {
        skip_assert_initialized!();
        let name = name.to_glib_none();
        unsafe {
            Option::<Pad>::from_glib_none(gst_sys::gst_ghost_pad_new_from_template(
                name.0,
                target.as_ref().to_glib_none().0,
                templ.to_glib_none().0,
            ))
            .map(|o| Cast::unsafe_cast(o))
            .ok_or_else(|| glib_bool_error!("Failed to create GhostPad"))
        }
    }

    /// Invoke the default activate mode function of a ghost pad.
    /// ## `pad`
    /// the `Pad` to activate or deactivate.
    /// ## `parent`
    /// the parent of `pad` or `None`
    /// ## `mode`
    /// the requested activation mode
    /// ## `active`
    /// whether the pad should be active or not.
    ///
    /// # Returns
    ///
    /// `true` if the operation was successful.
    pub fn activate_mode_default<P: IsA<GhostPad>, Q: IsA<Object>>(
        pad: &P,
        parent: Option<&Q>,
        mode: PadMode,
        active: bool,
    ) -> Result<(), glib::BoolError> {
        skip_assert_initialized!();
        unsafe {
            glib_result_from_gboolean!(
                gst_sys::gst_ghost_pad_activate_mode_default(
                    pad.to_glib_none().0 as *mut gst_sys::GstPad,
                    parent.map(|p| p.as_ref()).to_glib_none().0,
                    mode.to_glib(),
                    active.to_glib(),
                ),
                "Failed to invoke the default activate mode function of the ghost pad"
            )
        }
    }

    /// Invoke the default activate mode function of a proxy pad that is
    /// owned by a ghost pad.
    /// ## `pad`
    /// the `Pad` to activate or deactivate.
    /// ## `parent`
    /// the parent of `pad` or `None`
    /// ## `mode`
    /// the requested activation mode
    /// ## `active`
    /// whether the pad should be active or not.
    ///
    /// # Returns
    ///
    /// `true` if the operation was successful.
    pub fn internal_activate_mode_default<P: IsA<GhostPad>, Q: IsA<Object>>(
        pad: &P,
        parent: Option<&Q>,
        mode: PadMode,
        active: bool,
    ) -> Result<(), glib::BoolError> {
        skip_assert_initialized!();
        unsafe {
            glib_result_from_gboolean!(
                gst_sys::gst_ghost_pad_internal_activate_mode_default(
                    pad.to_glib_none().0 as *mut gst_sys::GstPad,
                    parent.map(|p| p.as_ref()).to_glib_none().0,
                    mode.to_glib(),
                    active.to_glib(),
                ),
                concat!(
                    "Failed to invoke the default activate mode function of a proxy pad ",
                    "that is owned by the ghost pad"
                )
            )
        }
    }
}