// 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 Player;
use PlayerSignalDispatcher;
use PlayerVideoRenderer;
use ffi;
use glib_ffi;
use glib::signal::SignalHandlerId;
use glib::signal::connect;
use glib::translate::*;
use gst;
use std::boxed::Box as Box_;
use std::mem::transmute;

impl Player {
    pub fn new(
        video_renderer: Option<&PlayerVideoRenderer>,
        signal_dispatcher: Option<&PlayerSignalDispatcher>,
    ) -> Player {
        assert_initialized_main_thread!();
        let video_renderer = video_renderer.to_glib_full();
        let signal_dispatcher = signal_dispatcher.to_glib_full();

        let (major, minor, _, _) = gst::version();
        if (major, minor) > (1, 12) {
            unsafe { from_glib_full(ffi::gst_player_new(video_renderer, signal_dispatcher)) }
        } else {
            // Workaround for bad floating reference handling in 1.12. This issue was fixed for 1.13 in
            // https://cgit.freedesktop.org/gstreamer/gst-plugins-bad/commit/gst-libs/gst/player/gstplayer.c?id=634cd87c76f58b5e1383715bafd5614db825c7d1
            unsafe { from_glib_none(ffi::gst_player_new(video_renderer, signal_dispatcher)) }
        }
    }

    pub fn set_config(&self, config: gst::Structure) -> bool {
        unsafe {
            from_glib(ffi::gst_player_set_config(
                self.to_glib_none().0,
                config.into_ptr(),
            ))
        }
    }

    pub fn connect_duration_changed<F: Fn(&Player, gst::ClockTime) + Send + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe {
            let f: Box_<Box_<Fn(&Player, gst::ClockTime) + Send + 'static>> = Box_::new(Box_::new(f));
            connect(self.to_glib_none().0, "duration-changed",
                    transmute(duration_changed_trampoline as usize), Box_::into_raw(f) as *mut _)
        }
    }

    pub fn connect_position_updated<F: Fn(&Player, gst::ClockTime) + Send + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe {
            let f: Box_<Box_<Fn(&Player, gst::ClockTime) + Send + 'static>> = Box_::new(Box_::new(f));
            connect(self.to_glib_none().0, "position-updated",
                    transmute(position_updated_trampoline as usize), Box_::into_raw(f) as *mut _)
        }
    }


    pub fn connect_seek_done<F: Fn(&Player, gst::ClockTime) + Send + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe {
            let f: Box_<Box_<Fn(&Player, gst::ClockTime) + Send + 'static>> = Box_::new(Box_::new(f));
            connect(self.to_glib_none().0, "seek-done",
                    transmute(seek_done_trampoline as usize), Box_::into_raw(f) as *mut _)
        }
    }

}

unsafe extern "C" fn duration_changed_trampoline(this: *mut ffi::GstPlayer, object: u64, f: glib_ffi::gpointer) {
    callback_guard!();
    let f: &&(Fn(&Player, gst::ClockTime) + Send + 'static) = transmute(f);
    f(&from_glib_borrow(this), gst::ClockTime(Some(object)))
}

unsafe extern "C" fn position_updated_trampoline(this: *mut ffi::GstPlayer, object: u64, f: glib_ffi::gpointer) {
    callback_guard!();
    let f: &&(Fn(&Player, gst::ClockTime) + Send + Sync + 'static) = transmute(f);
    f(&from_glib_borrow(this), gst::ClockTime(Some(object)))
}

unsafe extern "C" fn seek_done_trampoline(this: *mut ffi::GstPlayer, object: u64, f: glib_ffi::gpointer) {
    callback_guard!();
    let f: &&(Fn(&Player, gst::ClockTime) + Send + 'static) = transmute(f);
    f(&from_glib_borrow(this), gst::ClockTime(Some(object)))
}