# {{ ansible_managed }}

# To recreate this file, use ansible-playbook -i inventory.yml prod-playbook.yml --tags prerec-make

.ONESHELL:
SHELL := /bin/bash
# --- Shell Function Definition ---
# This function checks a given file ($1) for an audio stream.
# It returns the string "audio" if found, or nothing if not found.
# This makes the conditional check cleaner.
define IS_AUDIO_PRESENT_SCRIPT
	ffprobe -loglevel error -select_streams a:0 \
	        -show_entries stream=codec_type \
	        -of default=noprint_wrappers=1:nokey=1 "$1"
endef
IS_AUDIO_PRESENT = $(IS_AUDIO_PRESENT_SCRIPT)

source_patterns = $(foreach ext,$(VIDEO_EXTS),$(1)--original.$(ext))
ANSWER_EXTS = mp4 mkv mov mpv m4v
source_patterns = $(foreach ext,$(VIDEO_EXTS),$(1)--original.$(ext))
answer_patterns = $(foreach ext,$(ANSWER_EXTS),$(1)--answers.$(ext))

PRERECS_ORIGINAL := $(wildcard emacsconf-*--original.*)
ANSWERS_ORIGINAL := $(wildcard emacsconf-*--answers.*)
ANSWER_PREFIXES := $(shell for f in $(ANSWERS_ORIGINAL); do echo "$${f%--answers.*}"; done)
PREFIXES := $(shell for f in $(PRERECS_ORIGINAL); do echo "$${f%--original.*}"; done)
ANSWERS_REENCODED := $(addsuffix --answers--reencoded.webm, $(ANSWER_PREFIXES))
PRERECS_REENCODED := $(addsuffix --reencoded.webm, $(PREFIXES))
PRERECS_OPUS := $(addsuffix --reencoded.opus, $(PREFIXES))
PRERECS_MAIN_OPUS := $(addsuffix --main.opus, $(PREFIXES))
PRERECS_MAIN := $(addsuffix --main.webm, $(PREFIXES))
PRERECS_CAPTIONS := $(addsuffix --reencoded.vtt, $(PREFIXES))
PRERECS_FINAL := $(wildcard emacsconf-*--final.webm)
WAVEFORMS := $(addsuffix --backstage--waveform.png, $(PREFIXES))
LINODE_BBB_ID := 67329098

.PHONY: all

all: reencoded opus main main-opus waveforms.png

reencoded: $(PRERECS_REENCODED)

opus: $(PRERECS_OPUS)

captions: $(PRERECS_CAPTIONS)

main: $(PRERECS_MAIN)

main-opus: $(PRERECS_MAIN_OPUS)

waveforms: $(WAVEFORMS)

answers: $(ANSWERS_REENCODED)

emacsconf-%--answers--reencoded.webm: SOURCES = $(call answer_patterns, emacsconf-$*)
emacsconf-%--answers--reencoded.webm:
	$(eval SOURCE := $(lastword $(sort $(wildcard $(SOURCES)))))
	@echo $(SOURCE) $@

emacsconf-%--reencoded.webm: SOURCES = $(call source_patterns, emacsconf-$*)
emacsconf-%--reencoded.webm:
	$(eval SOURCE := $(lastword $(sort $(wildcard $(SOURCES)))))
	@if [ -z "$(SOURCE)" ]; then \
		echo "No source file found for $@"; \
		echo "Tried: $(SOURCES)"; \
		exit 1; \
	fi
	@echo "Using source: $(SOURCE)"
	reencode-in-screen.sh "$(SOURCE)"

emacsconf-%--reencoded.opus: emacsconf-%--reencoded.webm
	AUDIO_CHECK=$$( $(call IS_AUDIO_PRESENT, "$<") )
	if [ ! -z "$$AUDIO_CHECK" ]; then
		ffmpeg -y -i "$<" -c:a copy "$@"
	else
		ffmpeg -y -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=48000 -t 1 -c:a libopus "$@"
	fi

emacsconf-%--answers.opus: emacsconf-%--answers.webm
	ffmpeg -y -i "$<" -c:a copy "$@"

# emacsconf-%--normalized.opus: emacsconf-%--reencoded.opus
# 	ffmpeg-normalize "$<" -ofmt opus -c:a libopus -o "$@"

emacsconf-%--main.webm: emacsconf-%--reencoded.webm emacsconf-%--normalized.opus emacsconf-%--main.vtt
	ffmpeg -i emacsconf-$*--reencoded.webm -i emacsconf-$*--normalized.opus -i emacsconf-$*--main.vtt \
		-map 0:v -map 1:a -c:v copy -c:a copy \
		-map 2 -c:s webvtt -y \
		$@

emacsconf-%--main.webm: emacsconf-%--reencoded.webm emacsconf-%--normalized.opus
	ffmpeg -i emacsconf-$*--reencoded.webm -i emacsconf-$*--normalized.opus \
		-map 0:v -map 1:a -c:v copy -c:a copy \
    -y $@

emacsconf-%--main.webm: emacsconf-%--reencoded.webm
	cp "$<" "$@"

emacsconf-%--main.webm: emacsconf-%--reencoded.webm emacsconf-%--main.vtt
	cp "$<" "$@"
	ffmpeg -i emacsconf-$*--reencoded.webm -i emacsconf-$*--main.vtt \
	  -c:v copy -c:a copy \
    -y $@

emacsconf-%--final.webm: emacsconf-%--main.vtt
	mux-subs.sh "$@" "$<"

emacsconf-%--main.opus: emacsconf-%--main.webm
	AUDIO_CHECK=$$( $(call IS_AUDIO_PRESENT, "$<") )
	if [ ! -z "$$AUDIO_CHECK" ]; then \
		ffmpeg -y -i "$<" -c:a copy "$@"; \
	fi

emacsconf-%--reencoded.vtt: emacsconf-%--reencoded.opus
	whisperx --model large-v3 --align_model WAV2VEC2_ASR_LARGE_LV60K_960H --compute_type int8 --print_progress True --max_line_width 50 --segment_resolution chunk --max_line_count 1 --language en --initial_prompt "Transcribe this talk about Emacs. It may mention Emacs keywords such as Org Mode, Org Roam, Magit, gptel, or chatgpt-shell, or tech keywords such as LLMs. Format function names and keyboard shortcut sequences according to Emacs conventions using Markdown syntax. For example: control h becomes \`C-h\`." "$<"

emacsconf-%--backstage--silences.csv: emacsconf-%--reencoded.opus
	ffmpeg -i "$<" -af silencedetect=noise=-30dB:d=0.5 -f null - 2>&1 | awk '/silence_start/ {start=$$NF} /silence_end/ {print start "," (start + $$NF)}' > "$@"

show-files:
	@echo "Original $(words $(PRERECS_ORIGINAL)):"
	@echo "$(PRERECS_ORIGINAL)"
	@echo "Prefixes $(words $(PREFIXES)):"
	@echo "$(PREFIXES)"
	@echo "Reencoded $(words $(PRERECS_REENCODED)):"
	@echo "$(PRERECS_REENCODED)"
	@echo "Opus $(words $(PRERECS_OPUS)):"
	@echo "$(PRERECS_OPUS)"

bbb-testing:
	@echo "Resizing BBB node to 8GB 4 core for testing"
	linode-cli linodes resize $(LINODE_BBB_ID) --type g6-standard-4 --allow_auto_disk_resize false
	sleep 2m
	@echo "Booting up"
	linode-cli linodes boot $(LINODE_BBB_ID)
	ssh root@bbb.emacsverse.org "cd ~/greenlight-v3; docker compose restart"

bbb-dormant:
	@echo "Shutting down"
	ssh root@bbb.emacsverse.org "/usr/sbin/shutdown -h now &" || true
	sleep 30
	@echo "Powering off BBB node"
	linode-cli linodes shutdown $(LINODE_BBB_ID)
	sleep 30
	@echo "Resizing BBB node to nanode, dormant"
	linode-cli linodes resize $(LINODE_BBB_ID) --type g6-nanode-1 --allow_auto_disk_resize false

bbb-prod:
	@echo "Resizing BBB node to production size"
	linode-cli linodes resize $(LINODE_BBB_ID) --type g6-dedicated-8 --allow_auto_disk_resize true
	sleep 2m
	@echo "Booting up"
	linode-cli linodes boot $(LINODE_BBB_ID)

live-dormant:
	@echo "Resizing live0 node to nanode, dormant"
	linode-cli linodes resize 17921960 --type g6-nanode-1 --allow_auto_disk_resize false
	sleep 120
	linode-cli linodes boot 17921960


rsync:
	rsync -avzue ssh {{ emacsconf_caption_dir }}/cache/ orga@media.emacsconf.org:/var/www/media.emacsconf.org/{{ emacsconf_year }}/backstage/


WAVEFORM_HEIGHT := 240
WAVEFORM_WIDTH := 400
WAVEFORM_VOLUME := 3.0
WAVEFORM_FILTER := "[0:a]aformat=channel_layouts=mono[b];[b]volume=$(WAVEFORM_VOLUME)[a];[a]compand=attacks=0:points=-90/-90|0/0,showwavespic=s=$(WAVEFORM_WIDTH)x$(WAVEFORM_HEIGHT):colors=\#9cf42f[fg];color=s=$(WAVEFORM_WIDTH)x$(WAVEFORM_HEIGHT):color=\#44582c,drawgrid=width=iw/10:height=ih/5:color=\#9cf42f@0.1[bg];[bg][fg]overlay=format=auto[comp];[comp]drawtext=text='$$ID':fontcolor=white:fontsize=24:x=10:y=10:box=1:boxcolor=\#44582c@0.5:boxborderw=5"

emacsconf-%--backstage--waveform.png: emacsconf-%--normalized.opus
	AUDIO_CHECK=$$(ffprobe -loglevel error -select_streams a:0 -show_entries stream=codec_type -of default=noprint_wrappers=1:nokey=1 "$<"); \
	ID=$$(echo "$<" | sed 's/--.*//'); \
	if [ ! -z "$$AUDIO_CHECK" ]; then \
		ffmpeg -i "$<" \
	       -filter_complex $(WAVEFORM_FILTER) \
	       -frames:v 1 \
	       -c:v png \
	       -update 1 \
	       -y \
	       "$@"; \
	fi

emacsconf-%--backstage--waveform.png: emacsconf-%--reencoded.opus
	AUDIO_CHECK=$$(ffprobe -loglevel error -select_streams a:0 -show_entries stream=codec_type -of default=noprint_wrappers=1:nokey=1 "$<"); \
	ID=$$(echo "$<" | sed 's/--.*//'); \
	if [ ! -z "$$AUDIO_CHECK" ]; then \
		ffmpeg -i "$<" \
	       -filter_complex $(WAVEFORM_FILTER) \
	       -frames:v 1 \
	       -c:v png \
	       -update 1 \
	       -y \
	       "$@"; \
	fi

waveforms.png: $(WAVEFORMS)
	convert $^ +append "$@"