#################################################
# @PACKAGE_STRING@
# @configure_input@
#################################################

@SET_MAKE@

#################################################
# Standard definitions
#################################################

# project root-dir (directory of configure script)
top_srcdir  ?= @top_srcdir@
# project src-dir (directory of the current Makefile)
srcdir      ?= @srcdir@

# file-type suffix of executables (e.g. ".exe" in windows)
EXEEXT ?= @EXEEXT@

#################################################
# Tools
#################################################

# recursive dir creation tool (mkdir -p)
MKDIR     ?= @MKDIR_P@
RM        ?= rm -f
RM_REC    ?= $(RM) -r

#################################################
# USDX Paths
#################################################

USDX_SRC_DIR   := $(top_srcdir)/src
USDX_GAME_DIR  := $(top_srcdir)/game
USDX_TOOLS_DIR := $(top_srcdir)/tools
USDX_BUILD_DIR := $(top_srcdir)/build
USDX_LIB_DIR   := $(USDX_SRC_DIR)/lib

#################################################
# RC -> resource.inc
#################################################

# RC resource extraction config
RESEXTRACTOR_DIR := $(USDX_TOOLS_DIR)/ResourceExtractor
RESEXTRACTOR_BIN := $(RESEXTRACTOR_DIR)/ResourceExtractor$(EXEEXT)
RESOURCE_DIR  := $(USDX_GAME_DIR)/resources
RESOURCE_FILE := $(srcdir)/resource.inc
RC_FILE       := $(srcdir)/ultrastardx.rc

#################################################
# FPC config
#################################################

# Free Pascal compiler binary
PPC := @PPC@
# FPC target platform and processor
PPLATFORM  := @FPC_PLATFORM@
PPROCESSOR := @FPC_PROCESSOR@

# Directories added to the unit path
PUNIT_FLAGS := -Fu.

# Directory where compiled units (.ppu and .o files) are stored
PCUNIT_DIR   := $(USDX_BUILD_DIR)/fpc-$(PPROCESSOR)-$(PPLATFORM)
PCUNIT_FLAGS := -FU$(PCUNIT_DIR)

# Directories added to the includes path
PINC_FLAGS := -Fi$(USDX_LIB_DIR)/JEDI-SDL/SDL/Pas

PFLAGS_BASE    ?= -S2gi -vB
PFLAGS_EXTRA   ?= @PFLAGS_EXTRA@
PFLAGS_DEBUG   ?= @PFLAGS_DEBUG@
PFLAGS_RELEASE ?= @PFLAGS_RELEASE@
# user-flags (specified with configure) must be last in
# list to overwrite defaults (e.g. the "-"-option: -Xs-).
PFLAGS         ?= $(PFLAGS_BASE) @PFLAGS_MAKE@ $(PFLAGS_EXTRA)

LIBS       ?= @LIBS@
LDFLAGS    ?= @LDFLAGS@
linkflags  := $(strip $(LDFLAGS) $(LIBS))
ifneq ($(linkflags),)
PLINKFLAGS := -k"$(linkflags)"
endif

#################################################
# USDX project config
#################################################

# dpr project file used as input
USDX_PROJ := ultrastardx.dpr
# name of executable
USDX_BIN_NAME ?= ultrastardx$(EXEEXT)
USDX_BIN := $(USDX_GAME_DIR)/$(USDX_BIN_NAME)

#################################################
# ProjectM
#################################################

PROJECTM_CWRAPPER_DIR := $(USDX_LIB_DIR)/projectM/cwrapper
PROJECTM_CWRAPPER_LIB := $(PROJECTM_CWRAPPER_DIR)/libprojectM-cwrapper.a
USE_PROJECTM_CWRAPPER = @USE_PROJECTM_CWRAPPER@

#################################################
# Static libs
#################################################

STATIC_LIBS := 
ifeq ($(USE_PROJECTM_CWRAPPER), yes)
STATIC_LIBS += $(PROJECTM_CWRAPPER_LIB)
endif

#################################################
# general targets
#################################################

INC_FILES = $(shell find . -name "*.inc")
PAS_FILES = $(shell find . -name "*.pas" -o -name "*.pp")
BIN_DEPS = 

.PHONY: all
all: rebuild

# one shot debug build
.PHONY: debug
debug: PFLAGS := $(PFLAGS_BASE) $(PFLAGS_DEBUG) $(PFLAGS_EXTRA)
debug: rebuild

# one shot release build
.PHONY: release
release: PFLAGS := $(PFLAGS_BASE) $(PFLAGS_RELEASE) $(PFLAGS_EXTRA)
release: rebuild

# build, but always clean old data before compiling.
# FPC does not reliably recognize changes in .inc-files, static libs
# (and maybe even conditional .pas) dependencies. This might result
# in corrupted builds and renders debugging difficult.
# Clean if any (%) file changed.
.PHONY: rebuild
rebuild: CLEANON_PATTERN := %
rebuild: $(USDX_BIN)

# Use FPC to determine if the sources have to be rebuild.
# This does not work if an .inc or a static lib (e.g. .a) changed so we will
# manually clean in these cases. FPC might even miss some changes in 
# .pas files so we prefer the rebuild target.
# Clean if an inc-file (%.inc) or static lib (%.a) changed.
.PHONY: build
build: CLEANON_PATTERN := %.inc %.a
build: $(USDX_BIN)

#################################################
# build
#################################################

# After expansion of the expression, check_clean will
# contain the first changed prerequisite ($?) that matches
# CLEANON_PATTERN. It is used to check if any prerequisite of CLEANON_PATTERN
# type changed (we just return the first word to avoid spaces in 
# the result that might crash "test x$(check_clean)").
check_clean = $(firstword $(filter $(CLEANON_PATTERN), $?))

$(USDX_BIN): $(RESOURCE_FILE) $(USDX_PROJ) $(STATIC_LIBS) $(INC_FILES) $(PAS_FILES)
	@echo "==================================="
	@echo "Changed files:"
	@echo "$?"
	@echo "==================================="

# Checks if a rebuild is required.
# This is the case if any file matching $CLEANON_PATTERN changed.
	@if test x$(check_clean) != x; then \
	  echo "-----------------------------------"; \
	  echo "Clean objects..."; \
	  $(MAKE) clean_obj; \
	  echo "-----------------------------------"; \
	fi

	$(MKDIR) "$(PCUNIT_DIR)"
	$(PPC) $(strip $(PFLAGS) $(PDEFINES) $(PLINKFLAGS) $(PINC_FLAGS) $(PUNIT_FLAGS) $(PCUNIT_FLAGS)) -o$@ $(USDX_PROJ)

#################################################
# Resource-file
#################################################

$(RESOURCE_FILE): $(RC_FILE)
	$(RESEXTRACTOR_BIN) $(RC_FILE) $(RESOURCE_DIR) $(RESOURCE_FILE)


#################################################
# clean-up
#################################################

.PHONY: clean
clean: clean_obj clean_res

.PHONY: clean_res
clean_res:
	$(RM) "$(RESOURCE_FILE)"

.PHONY: clean_obj
clean_obj: clean_bin
	$(RM_REC) "$(PCUNIT_DIR)"
	-rmdir "$(USDX_BUILD_DIR)"

.PHONY: clean_bin
clean_bin:
	$(RM) "$(USDX_BIN)"