(load (sb-ext:posix-getenv "ASDF"))
(asdf:load-system 'cl-cffi-gtk)
(asdf:load-system 'cl-gobject-introspection)

(defpackage :tutorial-hello-world
				(:use :cl))

(in-package :tutorial-hello-world)

(gir:require-namespace "GLib")
(defvar *gtk* (gir:require-namespace "Gtk" "3.0"))
(gir:nget *gtk* "WindowType" :toplevel) ; get enum value

;; name wildly from
;; https://stackoverflow.com/questions/36296165/python-bindings-for-gstreamer-how-to-import-typelib
(defvar *gstreamer* (gir:require-namespace "Gst"))

;; overall capacities of this Glib bindings
;; https://github.com/andy128k/cl-gobject-introspection

;; back to hello-world
;; how'd i figure out what are the names to call, sad

(gir:nget *gstreamer* 'init )
(gir:nget *gstreamer* 'parse-launch)
(gir:nget *gstreamer* "State" :playing)
(gir:nget *gstreamer* "Element" 'set-state)
(gir:nget *gstreamer* "Element")

(progn
  (gir:invoke (*gstreamer* 'init) '())
  (let ((pipeline (gir:invoke (*gstreamer* 'parse-launch)
										"playbin uri=https://gstreamer.freedesktop.org/data/media/sintel_trailer-480p.webm"
										)))
	 (gir:invoke (pipeline 'set-state)
					 (gir:nget *gstreamer* "State" :playing))))

;; from here?
;; https://github.com/irsbugs/GStreaming?tab=readme-ov-file#gstparse_launch
;; and docs searched with underscore
;; https://gstreamer.freedesktop.org/documentation/gstreamer/gstparse.html?gi-language=python#gst_parse_launch
(defun tutorial-main ()
  (gir:invoke (*gstreamer* 'init) '())
  (let ((pipeline (gir:invoke (*gstreamer* 'parse-launch)
										"videotestsrc ! videoconvert ! autovideosink"
										;"playbin uri=https://gstreamer.freedesktop.org/data/media/sintel_trailer-480p.webm"
										)))
	 (gir:invoke (pipeline 'set-state)
					 (gir:nget *gstreamer* "State" :playing))
	 ;; (let* ((bus (gir:invoke (pipeline 'get-bus)))
	 ;; 		  (msg (gir:invoke (bus 'timed-pop-filtered)
	 ;; 								 (gir:nget *gstreamer* :clock-time-none)
	 ;; 								 (list
	 ;; 								  (gir:nget *gstreamer* "MessageType" :error)
	 ;; 								  (gir:nget *gstreamer* "MessageType" :eos))))))
	 (gir:invoke (pipeline 'set-state)
					 (gir:nget *gstreamer* "State" :paused))))
;; call 

;; so, it's only uri stuff didn't work
;; videotestsc worked
;; and error i got was from trying to set :null ? but it should be correct enum
;; oh well, ok
(defun for-screencast (stream-num)
  (gir:invoke (*gstreamer* 'init) '())
  (let* ((pipeline
			 (gir:invoke (*gstreamer* 'parse-launch)
							 (format nil "pipewiresrc path=~A ! videoconvert ! videobox name=move ! autovideosink" stream-num)
													 ;"playbin uri=https://gstreamer.freedesktop.org/data/media/sintel_trailer-480p.webm"
							 ))
			(move-element (gir:invoke (pipeline 'get-by-name) "move")))
	 (gir:invoke (pipeline 'set-state) (gir:nget *gstreamer* "State" :playing))
	 (values pipeline move-element)))

;; well, pipewire is not part of what's added to env
;; not sure if i can add it
;; trying to run without env gstreamer doesn't work, installing
;; $ sudo apt install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-good1.0-dev
;; still results in error for (defvar *gstreamer* (gir:require-namespace "Gst"))
;; i can try to add pipewire, but then would it work with the screen share running on system server?
;; it did work. wowy. ok
;; cool. now i'm kind of at the point of python example :D



;; huh. how the heck can i check all valid functions to call?
;; i don't understand. let's try creation of pipeline "by element"
(gir:invoke (*gstreamer* 'pipeline-new))

(gir:nget *gstreamer* 'init) ; this directly exists

(gir:nget *gstreamer* 'pipeline-new) ; doesn't work
(gir:nget *gstreamer* "Pipeline" 'new)
;; https://gstreamer.freedesktop.org/documentation/gstreamer/gstpipeline.html?gi-language=python#gst_pipeline_new
;; well, i guess it should be in namespace "Pipeline", so, huh


;;https://gstreamer.freedesktop.org/documentation/gstreamer/gstelementfactory.html?gi-language=python
(gir:nget *gstreamer* 'element-factory-make)
(gir:nget *gstreamer* "ElementFactory" 'make) ; and now this exists

;; OKOK

;; let's generalize, when stream is not passed, use the testsrc
(defun cast-with-videobox (&optional stream-num)
  (gir:invoke (*gstreamer* 'init) '())
  (let* ((pipeline (gir:invoke (*gstreamer* "Pipeline" 'new) "video-pipeline"))
         (source (gir:invoke (*gstreamer* "ElementFactory" 'make) (if stream-num
																							"pipewiresrc"
																							"videotestsrc") "source"))
         (convert (gir:invoke (*gstreamer* "ElementFactory" 'make) "videoconvert" "convert"))
         (box (gir:invoke (*gstreamer* "ElementFactory" 'make) "videobox" "box"))
         (sink (gir:invoke (*gstreamer* "ElementFactory" 'make) "autovideosink" "sink")))
	 (when stream-num
		;; Set pipewiresrc properties, such as the path
		(gir:invoke (source 'set-property) 'path stream-num))

	 ;; Add and link elements in the pipeline
    (gir:invoke (pipeline 'add) source)
    (gir:invoke (pipeline 'add) convert)
    (gir:invoke (pipeline 'add) box)
    (gir:invoke (pipeline 'add) sink)
    
    (gir:invoke (source 'link) convert)
    (gir:invoke (convert 'link) box)
    (gir:invoke (box 'link) sink)

	 (gir:invoke (pipeline 'set-state) (gir:nget *gstreamer* "State" :playing))
	 ;(format t ">> arhg ~A" (gir:property box 'top))
	 (defun move-video (top left)
		(setf (gir:property box 'top) top
				(gir:property box 'left) left))

    ;; Example: Move the video 10 pixels down and 20 pixels to the right
    (move-video 100 200)
	 pipeline))
;; now this works, but padding is symmetrical