###################################################################################
## Module Name:  Makefile                                                        ##
## Project:      AurixOS                                                         ##
##                                                                               ##
## Copyright (c) 2024-2025 Jozef Nagy                                            ##
##                                                                               ##
## This source is subject to the MIT License.                                    ##
## See License.txt in the root of this repository.                               ##
## All other rights reserved.                                                    ##
##                                                                               ##
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ##
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ##
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ##
## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ##
## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ##
## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE ##
## SOFTWARE.                                                                     ##
###################################################################################

.DEFAULT_GOAL := all

##
# Build configuration
#

export ARCH ?= x86_64
export PLATFORM ?= generic-pc
export BUILD_TYPE ?= debug

export ROOT_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))

export BUILD_DIR ?= $(ROOT_DIR)/build
export SYSROOT_DIR ?= $(ROOT_DIR)/sysroot
export RELEASE_DIR ?= $(ROOT_DIR)/release

NOUEFI ?= n

##
# Image generation and running
#

LIVECD := $(RELEASE_DIR)/aurix-$(GITREV)-livecd_$(ARCH)-$(PLATFORM).iso
LIVEHDD := $(RELEASE_DIR)/aurix-$(GITREV)-livehdd_$(ARCH)-$(PLATFORM).img
LIVESD := $(RELEASE_DIR)/aurix-$(GITREV)-livesd_$(ARCH)-$(PLATFORM).img

QEMU_FLAGS := -m 2G -smp 4 -serial stdio

##
# General info
#

export CODENAME := "Matterhorn"
export VERSION := "0.1"
export GITREV := $(shell git rev-parse --short HEAD)

export DEFINES := AURIX_CODENAME=$(CODENAME) \
				AURIX_VERSION=$(VERSION) \
				AURIX_GITREV=$(GITREV) \
				BUILD_TYPE=$(BUILD_TYPE)

ifeq ($(BUILD_TYPE),debug)
DEFINES += BUILD_DEBUG
else
DEFINES += BUILD_RELEASE
endif

##
# Recipes
#

.PHONY: all
all: boot kernel
	@:

.PHONY: boot
boot:
	@printf ">>> Building bootloader...\n"
ifneq (,$(filter $(ARCH),i686 x86_64))
	@$(MAKE) -C boot PLATFORM=pc-bios
else
	@$(MAKE) -C boot
endif
ifneq (,$(filter $(ARCH),i686 x86_64 arm32 aarch64))
ifeq ($(NOUEFI),n)
	@$(MAKE) -C boot PLATFORM=uefi
endif
endif

.PHONY: kernel
kernel:
	@printf ">>> Building kernel...\n"
	@$(MAKE) -C kernel

.PHONY: install
install: boot kernel
	@printf ">>> Building sysroot...\n"
	@mkdir -p $(SYSROOT_DIR)
ifneq (,$(filter $(ARCH),i686 x86_64))
	@$(MAKE) -C boot install PLATFORM=pc-bios
else
	@$(MAKE) -C boot install
endif
ifneq (,$(filter $(ARCH),i686 x86_64 arm32 aarch64))
ifeq ($(NOUEFI),n)
	@$(MAKE) -C boot install PLATFORM=uefi
endif
endif
	@$(MAKE) -C kernel install

ovmf:
	@printf ">>> Downloading OVMF images...\n"
	@utils/download-ovmf.sh

.PHONY: livecd
livecd: install
	@printf ">>> Generating Live CD..."
	@mkdir -p $(RELEASE_DIR)
	@utils/arch/$(ARCH)/generate-iso.sh $(LIVECD)

.PHONY: livehdd
livehdd: install
	@printf ">>> Generating Live HDD..."
	@mkdir -p $(RELEASE_DIR)
	@utils/arch/$(ARCH)/generate-hdd.sh $(LIVEHDD)

.PHONY: livesd
livesd: install
	@$(error SD Card Generation is not supported yet!)
	@printf ">>> Generating Live SD Card..."
	@mkdir -p $(RELEASE_DIR)
	@utils/arch/$(ARCH)/generate-sd.sh $(LIVESD)

.PHONY: run
run: livecd
	@printf ">>> Running QEMU...\n"
	@qemu-system-$(ARCH) $(QEMU_FLAGS) $(QEMU_MACHINE_FLAGS) -cdrom $(LIVECD)

.PHONY: run-uefi
run-uefi: livecd ovmf
	@printf ">>> Running QEMU (UEFI)...\n"
	@qemu-system-$(ARCH) $(QEMU_FLAGS) $(QEMU_MACHINE_FLAGS) -bios ovmf/ovmf-$(ARCH).fd -cdrom $(LIVECD)

.PHONY: clean
clean:
	@rm -rf $(BUILD_DIR) $(SYSROOT_DIR)

.PHONY: distclean
distclean:
	@rm -rf $(BUILD_DIR) $(SYSROOT_DIR) $(RELEASE_DIR) ovmf/