# ═══════════════════════════════════════════════════════════════════
#  ArkOS Build System — Top-Level Makefile
# ═══════════════════════════════════════════════════════════════════
#
#  Targets:
#    make build      — Full incremental build (cached Swift/SPM)
#    make run        — Launch ArkOS in QEMU (BIOS mode)
#    make run-uefi   — Launch ArkOS in QEMU (UEFI mode)
#    make clean      — Remove all build artifacts and caches
#
# ═══════════════════════════════════════════════════════════════════

# Project root is one level above this Makefile (arkos/Makefile)
ROOT := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))/..)
TOOLS := $(ROOT)/tools
ARKOS := $(ROOT)/arkos
CLANG := $(ARKOS)/prebuilts/clang/bin/clang

.PHONY: build run run-uefi clean

# ── Build ──────────────────────────────────────────────────────────
# Compiles tools/build orchestrator, then runs the full pipeline.
build:
	@$(MAKE) --no-print-directory -C $(TOOLS)
	@$(TOOLS)/build $(ARKOS)

# ── Run (BIOS) ─────────────────────────────────────────────────────
# Launches ArkOS in QEMU with:
#   - 2 GB RAM, 2 CPU cores
#   - VirtIO GPU for hardware-accelerated display
#   - VirtIO NIC with user-mode networking (TCP/IP stack via QEMU)
#   - Three disk images: boot, system, vendor
#   - KVM acceleration (falls back to software emulation)
run:
	@echo "Starting ArkOS in QEMU (BIOS mode)..."
	@qemu-system-x86_64 \
		-m 2048 \
		-smp 2 \
		-drive file=finished/boot.img,format=raw,index=0,media=disk,if=virtio \
		-drive file=finished/sys.img,format=raw,index=1,media=disk,if=virtio \
		-drive file=finished/vend.img,format=raw,index=2,media=disk,if=virtio \
		-vga virtio -debugcon file:ovmf.log -global isa-debugcon.iobase=0x402 \
		-netdev user,id=net0 \
		-device virtio-net-pci,netdev=net0 \
		-enable-kvm 2>/dev/null || \
	qemu-system-x86_64 \
		-m 2048 \
		-smp 2 \
		-drive file=finished/boot.img,format=raw,index=0,media=disk,if=virtio \
		-drive file=finished/sys.img,format=raw,index=1,media=disk,if=virtio \
		-drive file=finished/vend.img,format=raw,index=2,media=disk,if=virtio \
		-vga virtio -debugcon file:ovmf.log -global isa-debugcon.iobase=0x402 \
		-netdev user,id=net0 \
		-device virtio-net-pci,netdev=net0 \
		-serial stdio

# ── Run (UEFI) ────────────────────────────────────────────────────
run-uefi:
	@echo "Starting ArkOS in QEMU (UEFI mode)..."
	@qemu-system-x86_64 \
		-bios /usr/share/edk2/x64/OVMF.4m.fd \
		-m 2048 \
		-smp 2 \
		-drive file=finished/boot.img,format=raw,index=0,media=disk,if=virtio \
		-drive file=finished/sys.img,format=raw,index=1,media=disk,if=virtio \
		-drive file=finished/vend.img,format=raw,index=2,media=disk,if=virtio \
		-device virtio-vga,xres=1080,yres=1900 -debugcon file:ovmf.log -global isa-debugcon.iobase=0x402 \
		-netdev user,id=net0 \
		-device virtio-net-pci,netdev=net0 \
		-enable-kvm 2>/dev/null || \
	qemu-system-x86_64 \
		-bios /usr/share/edk2/x64/OVMF.4m.fd \
		-m 2048 \
		-smp 2 \
		-drive file=finished/boot.img,format=raw,index=0,media=disk,if=virtio \
		-drive file=finished/sys.img,format=raw,index=1,media=disk,if=virtio \
		-drive file=finished/vend.img,format=raw,index=2,media=disk,if=virtio \
		-device virtio-vga,xres=1080,yres=1900 -debugcon file:ovmf.log -global isa-debugcon.iobase=0x402 \
		-netdev user,id=net0 \
		-device virtio-net-pci,netdev=net0

# ── Clean ──────────────────────────────────────────────────────────
# Removes ALL build artifacts including SPM cache.
clean:
	rm -rf out_staging finished boot/assets
	@$(MAKE) --no-print-directory -C $(TOOLS) clean

# ═══════════════════════════════════════════════════════════════════
#  Binary Compilation Targets
# ═══════════════════════════════════════════════════════════════════
#  These are invoked by tools/build via `make -C <arkos-dir> <target>`.
#  They use direct swiftc compilation for minimal overhead.
# ═══════════════════════════════════════════════════════════════════

# Extract the Verified Boot signing key from vendor config
ARK_KEY := $(shell if [ -f vendor/verify/securebuild.ark ]; then \
	grep "^ARK-OS-" vendor/verify/securebuild.ark | tr -d '[:space:]'; \
	else echo "NO_KEY"; fi)

# ── fb_helper.o — Framebuffer ioctl bridge (C → Swift interop) ────
out_staging/fb_helper.o: system/core/fb_helper.c
	gcc -c system/core/fb_helper.c -o out_staging/fb_helper.o

# ── swift_splash — Boot Animation ────────────────────────────────
# Moved to ui_daemon
# (Removed swift_splash target)

# ── arkrt — ArkOS Runtime Daemon (PID 2) ──────────────────────────
out_staging/arkrt: arkrt/main.swift arkrt/KernelBridge.swift \
                   arkrt/CommandRouter.swift arkrt/IPC.swift \
                   arkrt/ServiceManager.swift arkrt/NetworkService.swift
	swiftc -O -static-executable \
		arkrt/main.swift arkrt/KernelBridge.swift \
		arkrt/CommandRouter.swift arkrt/IPC.swift \
		arkrt/ServiceManager.swift arkrt/NetworkService.swift \
		-o out_staging/arkrt

# ── init — PID 1 process (mounts filesystems, verifies boot) ─────
out_staging/init: system/core/init.c vendor/verify/sha256.c
	gcc -static vendor/verify/sha256.c system/core/init.c \
		-Ivendor/verify -DARK_KEY=\""$(ARK_KEY)"\" \
		-o out_staging/init

# ── Bootloader binaries (BIOS + UEFI) ────────────────────────────
out_staging/bootloader.bin: boot/source/bootloader.asm
	nasm -f bin boot/source/bootloader.asm -o out_staging/bootloader.bin

out_staging/stage2.bin: boot/source/stage2.asm
	nasm -f bin boot/source/stage2.asm -o out_staging/stage2.bin

out_staging/BOOTX64.EFI: boot/source/bootloader.c
	gcc -I/usr/include/efi -I/usr/include/efi/x86_64 -I/usr/include/efi/protocol \
		-fno-stack-protector -fpic -fshort-wchar -mno-red-zone -DEFI_FUNCTION_WRAPPER \
		-c boot/source/bootloader.c -o out_staging/bootloader_uefi.o
	ld -nostdlib -znocombreloc -T /usr/lib/elf_x86_64_efi.lds -shared -Bsymbolic \
		/usr/lib/crt0-efi-x86_64.o out_staging/bootloader_uefi.o \
		-o out_staging/bootloader_uefi.so -lgnuefi -lefi -L/usr/lib
	objcopy -j .text -j .sdata -j .data -j .rodata -j .dynamic -j .dynsym \
		-j .rel -j .rela -j .reloc -j .eh_frame \
		-O pei-x86-64 --subsystem 10 out_staging/bootloader_uefi.so out_staging/BOOTX64.EFI

# ── ui_daemon — Display Compositor ─────────────────────────────────
out_staging/system/ui_daemon: system/display/main.swift system/display/splash.swift out_staging/fb_helper.o
	@mkdir -p out_staging/system
	@swiftc -O -static-executable \
		system/display/main.swift system/display/splash.swift out_staging/fb_helper.o \
		-o out_staging/system/ui_daemon

# ── ui_test — Setup / Welcome app ────────────────────────────────
out_staging/system/ui_test: system/apps/ui_test.swift frameworks/ArkGraphics/ArkGraphics.swift
	mkdir -p out_staging/system
	swiftc -O -static-executable \
		system/apps/ui_test.swift frameworks/ArkGraphics/ArkGraphics.swift \
		-o out_staging/system/ui_test