# --------------- esphttpd config options ---------------

# If GZIP_COMPRESSION is set to "yes" then the static css, js, and html files will be compressed with gzip before added to the espfs image
# and will be served with gzip Content-Encoding header.
# This could speed up the downloading of these files, but might break compatibility with older web browsers not supporting gzip encoding
# because Accept-Encoding is simply ignored. Enable this option if you have large static files to serve (for e.g. JQuery, Twitter bootstrap)
# By default only js, css and html files are compressed.
# If you have text based static files with different extensions what you want to serve compressed then you will need to add the extension to the following places:
# - Add the extension to this Makefile at the webpages.espfs target to the find command
# - Add the extension to the gzippedFileTypes array in the user/httpd.c file
#
# Adding JPG or PNG files (and any other compressed formats) is not recommended, because GZIP compression does not works effectively on compressed files.

#Static gzipping is disabled by default.
#GZIP_COMPRESSION = "yes"

# If COMPRESS_W_YUI is set to "yes" then the static css and js files will be compressed with yui-compressor
# http://yui.github.io/yuicompressor/
#Disabled by default.
#COMPRESS_W_YUI = "yes"
YUI-COMPRESSOR ?= /usr/bin/yui-compressor

#If USE_HEATSHRINK is set to "yes" then the espfs files will be compressed with Heatshrink and decompressed
#on the fly while reading the file. Because the decompression is done in the esp8266, it does not require
#any support in the browser.
USE_HEATSHRINK = "yes"

#Position and maximum length of espfs in flash memory
ESPFS_POS = 0x12000
ESPFS_SIZE = 0x2E000

# -------------- End of esphttpd config options -------------


# Output directors to store intermediate compiled files
# relative to the project directory
BUILD_BASE	= build
FW_BASE		= firmware

# Base directory for the compiler. Needs a / at the end; if not set it'll use the tools that are in
# the PATH.
XTENSA_TOOLS_ROOT ?= 

# base directory of the ESP8266 SDK package, absolute
SDK_BASE	?= /opt/Espressif/ESP8266_SDK

#Esptool.py path and port
ESPTOOL		?= esptool.py
ESPPORT		?= /dev/ttyUSB0
#ESPDELAY indicates seconds to wait between flashing the two binary images
ESPDELAY	?= 3
ESPBAUD		?= 460800

# name for the target project
TARGET		= httpd




# which modules (subdirectories) of the project to include in compiling
#MODULES		= driver user lwip/api lwip/app lwip/core lwip/core/ipv4 lwip/netif
MODULES		= espfs httpd user
EXTRA_INCDIR	= include \
		. \
		lib/heatshrink/

# libraries used in this project, mainly provided by the SDK
LIBS		= c gcc hal phy pp net80211 wpa main lwip



# compiler flags using during compilation of source files
CFLAGS		= -Os -ggdb -std=c99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inline-functions \
		-nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH -D_STDINT_H \
		-Wno-address -DESPFS_POS=$(ESPFS_POS) -DESPFS_SIZE=$(ESPFS_SIZE)

# linker flags used to generate the main object file
LDFLAGS		= -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static

# linker script used for the above linkier step
LD_SCRIPT	= eagle.app.v6.ld

# various paths from the SDK used in this project
SDK_LIBDIR	= lib
SDK_LDDIR	= ld
SDK_INCDIR	= include include/json

# select which tools to use as compiler, librarian and linker
CC		:= $(XTENSA_TOOLS_ROOT)xtensa-lx106-elf-gcc
AR		:= $(XTENSA_TOOLS_ROOT)xtensa-lx106-elf-ar
LD		:= $(XTENSA_TOOLS_ROOT)xtensa-lx106-elf-gcc


####
#### no user configurable options below here
####
SRC_DIR		:= $(MODULES)
BUILD_DIR	:= $(addprefix $(BUILD_BASE)/,$(MODULES))

SDK_LIBDIR	:= $(addprefix $(SDK_BASE)/,$(SDK_LIBDIR))
SDK_INCDIR	:= $(addprefix -I$(SDK_BASE)/,$(SDK_INCDIR))

SRC		:= $(foreach sdir,$(SRC_DIR),$(wildcard $(sdir)/*.c))
OBJ		:= $(patsubst %.c,$(BUILD_BASE)/%.o,$(SRC))
LIBS		:= $(addprefix -l,$(LIBS))
APP_AR		:= $(addprefix $(BUILD_BASE)/,$(TARGET)_app.a)
TARGET_OUT	:= $(addprefix $(BUILD_BASE)/,$(TARGET).out)

LD_SCRIPT	:= $(addprefix -T$(SDK_BASE)/$(SDK_LDDIR)/,$(LD_SCRIPT))

INCDIR	:= $(addprefix -I,$(SRC_DIR))
EXTRA_INCDIR	:= $(addprefix -I,$(EXTRA_INCDIR))
MODULE_INCDIR	:= $(addsuffix /include,$(INCDIR))

V ?= $(VERBOSE)
ifeq ("$(V)","1")
Q :=
vecho := @true
else
Q := @
vecho := @echo
endif

ifeq ($(GZIP_COMPRESSION),"yes")
CFLAGS		+= -DGZIP_COMPRESSION
endif

ifeq ($(USE_HEATSHRINK),"yes")
CFLAGS		+= -DESPFS_HEATSHRINK
endif

vpath %.c $(SRC_DIR)

define compile-objects
$1/%.o: %.c
	$(vecho) "CC $$<"
	$(Q) $(CC) $(INCDIR) $(MODULE_INCDIR) $(EXTRA_INCDIR) $(SDK_INCDIR) $(CFLAGS)  -c $$< -o $$@
endef

.PHONY: all checkdirs clean

all: checkdirs $(TARGET_OUT) $(FW_BASE)

$(TARGET_OUT): $(APP_AR)
	$(vecho) "LD $@"
	$(Q) $(LD) -L$(SDK_LIBDIR) $(LD_SCRIPT) $(LDFLAGS) -Wl,--start-group $(LIBS) $(APP_AR) -Wl,--end-group -o $@

$(FW_BASE): $(TARGET_OUT)
	$(vecho) "FW $@"
	$(Q) mkdir -p $@
	$(Q) $(ESPTOOL) elf2image $(TARGET_OUT) --output $@/

$(APP_AR): $(OBJ)
	$(vecho) "AR $@"
	$(Q) $(AR) cru $@ $^

checkdirs: $(BUILD_DIR)

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


flash: $(TARGET_OUT) $(FW_BASE)
	$(Q) $(ESPTOOL) --port $(ESPPORT) --baud $(ESPBAUD) write_flash 0x00000 $(FW_BASE)/0x00000.bin 0x40000 $(FW_BASE)/0x40000.bin

webpages.espfs: html/ html/wifi/ espfs/mkespfsimage/mkespfsimage
ifeq ($(GZIP_COMPRESSION),"yes")
	$(Q) rm -rf html_compressed;
	$(Q) cp -r html html_compressed;
ifeq ($(COMPRESS_W_YUI),"yes")
	$(Q) echo "Compression assets with yui-compressor. This may take a while..."
	$(Q) for file in `find html_compressed -type f -name "*.js"`; do $(YUI-COMPRESSOR) --type js $$file -o $$file; done
	$(Q) for file in `find html_compressed -type f -name "*.css"`; do $(YUI-COMPRESSOR) --type css $$file -o $$file; done
	$(Q) awk "BEGIN {printf \"YUI compression ratio was: %.2f%%\\n\", (`du -b -s html_compressed/ | sed 's/\([0-9]*\).*/\1/'`/`du -b -s html/ | sed 's/\([0-9]*\).*/\1/'`)*100}"
endif
	$(Q) cd html_compressed; find . -type f -regex ".*/.*\.\(html\|css\|js\)" -exec sh -c "gzip -n {}; mv {}.gz {}" \;; cd ..;
	$(Q) cd html_compressed; find  | ../espfs/mkespfsimage/mkespfsimage > ../webpages.espfs; cd ..;
	$(Q) awk "BEGIN {printf \"GZIP compression ratio was: %.2f%%\\n\", (`du -b -s html_compressed/ | sed 's/\([0-9]*\).*/\1/'`/`du -b -s html/ | sed 's/\([0-9]*\).*/\1/'`)*100}"
else
	$(Q) cd html; find | ../espfs/mkespfsimage/mkespfsimage > ../webpages.espfs; cd ..
endif
espfs/mkespfsimage/mkespfsimage: espfs/mkespfsimage/
	make -C espfs/mkespfsimage

htmlflash: webpages.espfs
	$(Q) if [ $$(stat -c '%s' webpages.espfs) -gt $$(( $(ESPFS_SIZE) )) ]; then echo "webpages.espfs too big!"; false; fi
	$(Q) $(ESPTOOL) --port $(ESPPORT) --baud $(ESPBAUD) write_flash $(ESPFS_POS) webpages.espfs

clean:
	$(Q) rm -f $(APP_AR)
	$(Q) rm -f $(TARGET_OUT)
	$(Q) find $(BUILD_BASE) -type f | xargs rm -f
	$(Q) rm -rf mkespfsimage
	$(Q) rm -rf $(FW_BASE)

	$(Q) rm -f webpages.espfs

$(foreach bdir,$(BUILD_DIR),$(eval $(call compile-objects,$(bdir))))