CXX := xcrun clang++
SWIFT := xcrun swiftc
FFMPEG := libavformat libavcodec libavutil libswresample libswscale
FF_CFLAGS = $(shell pkg-config --cflags $(FFMPEG))
FF_LIBS = $(shell pkg-config --libs $(FFMPEG))
ARCH := $(shell uname -m)
BUILD_DIR ?= .build
DEBUG_FLAGS ?= -g
PREFIX ?= $(HOME)/.local
CXXFLAGS = -std=c++20 -mmacosx-version-min=15.0 -O2 $(DEBUG_FLAGS) -Wall -Wextra -Wno-unused-parameter $(FF_CFLAGS)
FRAMEWORKS := -framework AppKit -framework AudioToolbox -framework CoreAudio -framework Metal -framework MetalKit -framework QuartzCore -framework MediaPlayer
OBJECTS := $(BUILD_DIR)/player.o $(BUILD_DIR)/Output.o
SWIFT_SOURCES := Sources/App/TerebiApp.swift Sources/App/CompactWindow.swift Sources/App/YouTubeResolver.swift Sources/App/PlaybackProgress.swift Sources/App/SystemPlaybackControls.swift Sources/App/AutomaticQuality.swift
RUNTIME_SOURCE := Sources/Launcher/FFmpegRuntime.swift
CLI_SOURCES := Sources/CLI/TerebiCLI.swift Sources/CLI/PlayerCommand.swift Sources/App/YouTubeResolver.swift $(RUNTIME_SOURCE)
APP := $(BUILD_DIR)/terebi.app
PLAYER := $(APP)/Contents/Frameworks/libterebi-player.dylib
BOOTSTRAP := $(APP)/Contents/MacOS/terebi
MANIFEST := $(APP)/Contents/Resources/ffmpeg-libraries.txt

.PHONY: all release install check-dependencies run check check-fixtures check-audio check-window check-youtube check-quality check-adaptive check-network check-progress check-cli check-runtime check-media check-startup
all: check-dependencies $(BUILD_DIR)/terebi $(PLAYER) $(BOOTSTRAP) $(MANIFEST) $(APP)/Contents/Info.plist

check-dependencies:
	@command -v pkg-config >/dev/null 2>&1 || { printf '%s\n' 'Error: pkg-config is required to build terebi. Run: brew install ffmpeg pkg-config' >&2; exit 1; }
	@pkg-config --exists $(FFMPEG) || { printf '%s\n' 'Error: FFmpeg development libraries are unavailable. Run: brew install ffmpeg pkg-config' 'If FFmpeg is already installed, check PKG_CONFIG_PATH, then rebuild/reinstall terebi.' >&2; exit 1; }

release:
	$(MAKE) BUILD_DIR=.build/release DEBUG_FLAGS= all

install: release
	mkdir -p "$(PREFIX)/lib/terebi" "$(PREFIX)/bin"
	rm -f "$(PREFIX)/lib/terebi/terebi"
	rm -rf "$(PREFIX)/lib/terebi/terebi.app"
	cp ".build/release/terebi" "$(PREFIX)/lib/terebi/terebi"
	cp -R ".build/release/terebi.app" "$(PREFIX)/lib/terebi/terebi.app"
	ln -sfn "$$(cd "$(PREFIX)" && pwd)/lib/terebi/terebi" "$(PREFIX)/bin/terebi"

$(BUILD_DIR):
	mkdir -p "$@"

$(BUILD_DIR)/player.o: Sources/Core/player.cpp Sources/Core/player.h Sources/Core/player_macos.h Sources/Core/output.hpp Sources/Core/network_input.hpp Makefile | $(BUILD_DIR) check-dependencies
	$(CXX) $(CXXFLAGS) -c $< -o $@

$(BUILD_DIR)/Output.o: Sources/macOS/Output.mm Sources/Core/output.hpp Makefile | $(BUILD_DIR) check-dependencies
	$(CXX) $(CXXFLAGS) -fobjc-arc -c $< -o $@

$(PLAYER): $(SWIFT_SOURCES) $(OBJECTS) Makefile | check-dependencies
	mkdir -p "$(APP)/Contents/Frameworks"
	rm -f "$(APP)/Contents/MacOS/terebi-player"
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -emit-library -O $(DEBUG_FLAGS) -import-objc-header Sources/Core/player_macos.h $(SWIFT_SOURCES) $(OBJECTS) $(FF_LIBS) $(FRAMEWORKS) -lc++ -Xlinker -install_name -Xlinker @rpath/libterebi-player.dylib -o $@

$(MANIFEST): $(PLAYER) Makefile
	mkdir -p "$(APP)/Contents/Resources"
	@otool -L "$<" | sed -nE 's#^[[:space:]]+(/.*/lib(avformat|avcodec|avutil|swresample|swscale)(\.[^/[:space:]]+)?\.dylib) \(.*#\1#p' > "$@.tmp"; \
	if [ "$$(wc -l < "$@.tmp" | tr -d ' ')" != 5 ]; then \
		rm -f "$@.tmp"; \
		printf '%s\n' 'Error: could not record all five absolute FFmpeg dylib paths from the player library. Rebuild with Homebrew FFmpeg: brew install ffmpeg pkg-config' >&2; \
		exit 1; \
	fi; \
	mv "$@.tmp" "$@"

$(BOOTSTRAP): Sources/App/Bootstrap.swift $(RUNTIME_SOURCE) Makefile | check-dependencies
	mkdir -p "$(APP)/Contents/MacOS"
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) Sources/App/Bootstrap.swift $(RUNTIME_SOURCE) -framework AppKit -o $@

$(APP)/Contents/Info.plist: Resources/Info.plist
	mkdir -p "$(APP)/Contents"
	cp "$<" "$@"

$(BUILD_DIR)/terebi: $(CLI_SOURCES) $(PLAYER) $(BOOTSTRAP) $(MANIFEST) $(APP)/Contents/Info.plist Makefile | check-dependencies
	rm -f "$@"
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) $(CLI_SOURCES) -framework AppKit -o $@

run: all
	open "$(APP)"

$(BUILD_DIR)/playback-check: Checks/playback.mm $(OBJECTS) Makefile | check-dependencies
	$(CXX) $(CXXFLAGS) -fobjc-arc $< $(OBJECTS) $(FF_LIBS) $(FRAMEWORKS) -o $@

check: check-dependencies $(BUILD_DIR)/playback-check check-fixtures check-audio check-window check-youtube check-quality check-adaptive check-network check-progress check-cli check-runtime check-media check-startup
	$(BUILD_DIR)/playback-check $(BUILD_DIR)/fixtures

check-fixtures: | check-dependencies
	mkdir -p $(BUILD_DIR)/fixtures
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i testsrc2=size=320x180:rate=24 -f lavfi -i sine=frequency=440:sample_rate=44100 -t 4 -c:v mpeg4 -bf 2 -c:a aac $(BUILD_DIR)/fixtures/av.mp4
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/av.mp4 -an -c:v copy $(BUILD_DIR)/fixtures/video.mp4
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/av.mp4 -an -vf setsar=3/2 -c:v mpeg4 $(BUILD_DIR)/fixtures/anamorphic.mp4
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/av.mp4 -vn -c:a pcm_s16le $(BUILD_DIR)/fixtures/audio.wav
	# Literal frame PTS: 0,.1,.2,.3,.4,.65,.9,1.15,1.4,1.5,1.6,1.7; reordered B-frames across short GOPs.
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i testsrc2=size=320x180:rate=10:duration=1.2 -f lavfi -i sine=frequency=440:sample_rate=44100:duration=2 -vf "settb=1/1000,setpts='if(lt(N,5),N*100,if(lt(N,9),400+(N-4)*250,1400+(N-8)*100))'" -fps_mode vfr -enc_time_base:v 1:1000 -c:v mpeg4 -g 4 -bf 2 -video_track_timescale 1000 -c:a aac $(BUILD_DIR)/fixtures/frame-step.mp4
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i testsrc2=size=160x90:rate=12 -t 1 -vf 'format=yuv420p10le,setparams=color_primaries=bt2020:color_trc=smpte2084:colorspace=bt2020nc' -c:v ffv1 $(BUILD_DIR)/fixtures/hdr.mkv
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i testsrc2=size=320x180:rate=24 -f lavfi -i sine=frequency=440:sample_rate=44100 -t 120 -c:v mpeg4 -q:v 2 -g 24 -bf 2 -c:a aac -movflags +faststart $(BUILD_DIR)/fixtures/cache.mp4

$(BUILD_DIR)/Output-check.o: Sources/macOS/Output.mm Sources/Core/output.hpp Makefile | $(BUILD_DIR) check-dependencies
	$(CXX) $(CXXFLAGS) -fobjc-arc -DPLAYER_AUDIO_CHECK -c $< -o $@

$(BUILD_DIR)/audio-continuity-check: Checks/audio-continuity.cpp $(BUILD_DIR)/player.o $(BUILD_DIR)/Output-check.o Makefile | check-dependencies
	$(CXX) $(CXXFLAGS) $< $(BUILD_DIR)/player.o $(BUILD_DIR)/Output-check.o $(FF_LIBS) $(FRAMEWORKS) -o $@

check-audio: $(BUILD_DIR)/audio-continuity-check
	mkdir -p $(BUILD_DIR)/fixtures
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i sine=frequency=440:sample_rate=44100 -t 2 -c:a pcm_s16le $(BUILD_DIR)/fixtures/tone441.wav
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i sine=frequency=440:sample_rate=48000 -t 2 -c:a pcm_s16le $(BUILD_DIR)/fixtures/tone480.wav
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i testsrc2=size=160x90:rate=24:duration=2 -i $(BUILD_DIR)/fixtures/tone480.wav -c:v mpeg4 -g 48 -bf 2 -c:a copy $(BUILD_DIR)/fixtures/tone-step.mov
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/tone441.wav -c:a copy $(BUILD_DIR)/fixtures/tone441.mka
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/tone441.wav -c:a aac $(BUILD_DIR)/fixtures/tone-aac.m4a
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/tone441.wav -af "asetpts='PTS+gte(T,1)*0.25/TB'" -c:a pcm_s16le $(BUILD_DIR)/fixtures/tone-gap.mka
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/tone441.wav -ar 48000 -ac 2 -f f32le $(BUILD_DIR)/fixtures/tone441.wav.f32
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/tone480.wav -ar 48000 -ac 2 -f f32le $(BUILD_DIR)/fixtures/tone480.wav.f32
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/tone441.mka -ar 48000 -ac 2 -f f32le $(BUILD_DIR)/fixtures/tone441.mka.f32
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/tone-aac.m4a -ar 48000 -ac 2 -f f32le $(BUILD_DIR)/fixtures/tone-aac.m4a.f32
	$(BUILD_DIR)/audio-continuity-check $(BUILD_DIR)/fixtures

$(BUILD_DIR)/compact-window-check: Checks/compact-window.swift Sources/App/CompactWindow.swift Makefile | $(BUILD_DIR) check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) Checks/compact-window.swift Sources/App/CompactWindow.swift -framework AppKit -o $@

check-window: $(BUILD_DIR)/compact-window-check
	$(BUILD_DIR)/compact-window-check

$(BUILD_DIR)/youtube-resolver-check: Checks/youtube-resolver.swift Sources/App/YouTubeResolver.swift Makefile | $(BUILD_DIR) check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) Checks/youtube-resolver.swift Sources/App/YouTubeResolver.swift -framework Foundation -o $@

check-youtube: $(BUILD_DIR)/youtube-resolver-check
	$(BUILD_DIR)/youtube-resolver-check

$(BUILD_DIR)/automatic-quality-check: Checks/automatic-quality.swift Sources/App/AutomaticQuality.swift Makefile | $(BUILD_DIR) check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) Checks/automatic-quality.swift Sources/App/AutomaticQuality.swift -framework Foundation -o $@

check-quality: $(BUILD_DIR)/automatic-quality-check
	$(BUILD_DIR)/automatic-quality-check

$(BUILD_DIR)/automatic-quality-playback-check: Checks/automatic-quality-playback.swift $(SWIFT_SOURCES) $(OBJECTS) Makefile | check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -DPLAYER_CHECK -O $(DEBUG_FLAGS) -import-objc-header Sources/Core/player_macos.h $< $(SWIFT_SOURCES) $(OBJECTS) $(FF_LIBS) $(FRAMEWORKS) -lc++ -o $@

check-adaptive: $(BUILD_DIR)/automatic-quality-playback-check
	mkdir -p $(BUILD_DIR)/fixtures
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i color=c=blue:size=1920x1080:rate=24 -f lavfi -i sine=frequency=440:sample_rate=44100 -t 120 -c:v mpeg4 -g 24 -bf 2 -c:a aac -movflags +faststart $(BUILD_DIR)/fixtures/quality-1080.mp4
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i color=c=green:size=1280x720:rate=24 -f lavfi -i sine=frequency=440:sample_rate=44100 -t 120 -c:v mpeg4 -g 24 -bf 2 -c:a aac -movflags +faststart $(BUILD_DIR)/fixtures/quality-720.mp4
	python3 Checks/automatic-quality.py $(BUILD_DIR)/automatic-quality-playback-check $(BUILD_DIR)/fixtures

$(BUILD_DIR)/network-playback-check: Checks/network-playback.mm $(OBJECTS) Makefile | check-dependencies
	$(CXX) $(CXXFLAGS) -fobjc-arc $< $(OBJECTS) $(FF_LIBS) $(FRAMEWORKS) -o $@

check-network: $(BUILD_DIR)/network-playback-check check-fixtures
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/frame-step.mp4 -an -c:v copy $(BUILD_DIR)/fixtures/frame-step-video.mp4
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/frame-step.mp4 -vn -c:a copy $(BUILD_DIR)/fixtures/frame-step-audio.m4a
	ffmpeg -hide_banner -loglevel error -y -f lavfi -i testsrc2=size=320x180:rate=24 -f lavfi -i sine=frequency=440:sample_rate=44100 -t 30 -c:v mpeg4 -q:v 2 -bf 2 -c:a aac -movflags +faststart $(BUILD_DIR)/fixtures/streaming.mp4
	ffmpeg -hide_banner -loglevel error -y -i $(BUILD_DIR)/fixtures/av.mp4 -c:v libx264 -g 24 -keyint_min 24 -sc_threshold 0 -c:a aac -hls_time 1 -hls_playlist_type vod -hls_segment_filename $(BUILD_DIR)/fixtures/network-vod-%d.ts $(BUILD_DIR)/fixtures/network-vod.m3u8
	python3 Checks/streaming.py $(BUILD_DIR)/network-playback-check $(BUILD_DIR)/fixtures

$(BUILD_DIR)/playback-progress-check: Checks/playback-progress.swift Sources/App/PlaybackProgress.swift Makefile | $(BUILD_DIR) check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) Checks/playback-progress.swift Sources/App/PlaybackProgress.swift -framework Foundation -o $@

check-progress: $(BUILD_DIR)/playback-progress-check
	$(BUILD_DIR)/playback-progress-check

$(BUILD_DIR)/player-command-check: Checks/player-command.swift Sources/CLI/PlayerCommand.swift Sources/App/YouTubeResolver.swift Makefile | $(BUILD_DIR) check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) Checks/player-command.swift Sources/CLI/PlayerCommand.swift Sources/App/YouTubeResolver.swift -framework Foundation -o $@

check-cli: $(BUILD_DIR)/player-command-check
	$(BUILD_DIR)/player-command-check

$(BUILD_DIR)/ffmpeg-runtime-check: Checks/ffmpeg-runtime.swift $(RUNTIME_SOURCE) Makefile | $(BUILD_DIR)
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -O $(DEBUG_FLAGS) Checks/ffmpeg-runtime.swift $(RUNTIME_SOURCE) -framework Foundation -o $@

check-runtime: $(BUILD_DIR)/ffmpeg-runtime-check $(MANIFEST)
	$(BUILD_DIR)/ffmpeg-runtime-check "$(APP)"

$(BUILD_DIR)/system-playback-check: Checks/system-playback.swift $(SWIFT_SOURCES) $(OBJECTS) Makefile | check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -DPLAYER_CHECK -O $(DEBUG_FLAGS) -import-objc-header Sources/Core/player_macos.h Checks/system-playback.swift $(SWIFT_SOURCES) $(OBJECTS) $(FF_LIBS) $(FRAMEWORKS) -lc++ -o $@

check-media: $(BUILD_DIR)/system-playback-check check-fixtures
	$(BUILD_DIR)/system-playback-check $(BUILD_DIR)/fixtures

$(BUILD_DIR)/app-startup-check.dylib: Checks/app-startup.swift $(SWIFT_SOURCES) $(OBJECTS) Makefile | check-dependencies
	$(SWIFT) -target $(ARCH)-apple-macosx15.0 -swift-version 6 -parse-as-library -emit-library -DPLAYER_CHECK -O $(DEBUG_FLAGS) -import-objc-header Sources/Core/player_macos.h Checks/app-startup.swift $(SWIFT_SOURCES) $(OBJECTS) $(FF_LIBS) $(FRAMEWORKS) -lc++ -o $@

check-startup: all $(BUILD_DIR)/app-startup-check.dylib check-fixtures
	python3 Checks/app-startup.py "$(APP)" "$(BUILD_DIR)/app-startup-check.dylib" "$(BUILD_DIR)/fixtures"