#!/usr/bin/env bash
# kaleidoscope-builder - Kaleidoscope helper tool
# Copyright (C) 2017-2018  Keyboard.io, Inc.
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, version 3.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.

set -e

######
###### Build and output configuration
######

build_version () {
    GIT_VERSION="$(cd "$(find_sketch)"; if [ -d .git ]; then echo '-g' && git describe --abbrev=4 --dirty --always; fi)"
    LIB_PROPERTIES_PATH="${LIB_PROPERTIES_PATH:-"../.."}"
    LIB_VERSION="$(cd "$(find_sketch)"; (grep version= "${LIB_PROPERTIES_PATH}/library.properties" 2>/dev/null || echo version=0.0.0) | cut -d= -f2)${GIT_VERSION}"
}

build_paths() {
    # We don't really want to use find
    # shellcheck disable=SC2012
    SKETCH_IDENTIFIER="$(ls -id "$(realpath "$(find_sketch)/${SKETCH}.ino")" | cut -d ' ' -f 1)-${SKETCH}.ino"
    KALEIDOSCOPE_TEMP_PATH="${KALEIDOSCOPE_TEMP_PATH:-${TMPDIR:-/tmp}/kaleidoscope-${USER}}"


    KALEIDOSCOPE_BUILD_PATH="${KALEIDOSCOPE_BUILD_PATH:-${KALEIDOSCOPE_TEMP_PATH}/sketch}"
    KALEIDOSCOPE_OUTPUT_PATH="${KALEIDOSCOPE_OUTPUT_PATH:-${KALEIDOSCOPE_TEMP_PATH}/sketch}"

    SKETCH_OUTPUT_DIR="${SKETCH_OUTPUT_DIR:-${SKETCH_IDENTIFIER}/output}"
    SKETCH_BUILD_DIR="${SKETCH_BUILD_DIR:-${SKETCH_IDENTIFIER}/build}"

    BUILD_PATH="${BUILD_PATH:-${KALEIDOSCOPE_BUILD_PATH}/${SKETCH_BUILD_DIR}}"
    OUTPUT_PATH="${OUTPUT_PATH:-${KALEIDOSCOPE_OUTPUT_PATH}/${SKETCH_OUTPUT_DIR}}"

    CCACHE_WRAPPER_PATH="${CCACHE_WRAPPER_PATH:-${KALEIDOSCOPE_TEMP_PATH}/ccache/bin}"
    CORE_CACHE_PATH="${CORE_CACHE_PATH:-${KALEIDOSCOPE_TEMP_PATH}/arduino-cores}"

    mkdir -p "$CORE_CACHE_PATH"
    mkdir -p "$BUILD_PATH"
}

build_filenames () {
    OUTPUT_FILE_PREFIX="${SKETCH}-${LIB_VERSION}"
    HEX_FILE_PATH="${OUTPUT_PATH}/${OUTPUT_FILE_PREFIX}.hex"
    HEX_FILE_WITH_BOOTLOADER_PATH="${OUTPUT_PATH}/${OUTPUT_FILE_PREFIX}-with-bootloader.hex"
    ELF_FILE_PATH="${OUTPUT_PATH}/${OUTPUT_FILE_PREFIX}.elf"
}


enable_ccache () {
    if  [ "$(command -v ccache)" ]; then
    if ! [ -d "$CCACHE_WRAPPER_PATH" ]; then
	mkdir -p "$CCACHE_WRAPPER_PATH"
	ln -s "$(command -v ccache)" "${CCACHE_WRAPPER_PATH}/${COMPILER_PREFIX}gcc"
	ln -s "$(command -v ccache)" "${CCACHE_WRAPPER_PATH}/${COMPILER_PREFIX}g++"
	ln -s "${AVR_NM}" "${CCACHE_WRAPPER_PATH}/${COMPILER_PREFIX}nm"
	ln -s "${AVR_OBJCOPY}" "${CCACHE_WRAPPER_PATH}/${COMPILER_PREFIX}objcopy"
	ln -s "${AVR_AR}" "${CCACHE_WRAPPER_PATH}/${COMPILER_PREFIX}ar"
	ln -s "${AVR_SIZE}" "${CCACHE_WRAPPER_PATH}/${COMPILER_PREFIX}size"
    fi
    export CCACHE_PATH=${COMPILER_PATH}/
    CCACHE_ENABLE="-prefs compiler.path=${CCACHE_WRAPPER_PATH}/"
    fi
}


firmware_size () {
    if [ "${BOARD}" = "virtual" ]; then
        echo "[Size not computed for virtual build]"
        return
    fi

    ## This is a terrible hack, please don't hurt me. - algernon

    find_max_prog_size
    set +e
    raw_output=$("$@" 2> /dev/null)
    rc=$?
    set -e

    if [ $rc -eq 0 ]; then
        output="$(echo "${raw_output}"| grep "\\(Program\\|Data\\):" | sed -e 's,^,  - ,' && echo)"

        PROGSIZE="$(echo "${output}" | grep "Program:" | cut -d: -f2 | awk '{print $1}')"

        PERCENT="$(echo "${PROGSIZE}" "${MAX_PROG_SIZE}" | awk "{ printf \"%02.01f\", \$1 / \$2 * 100 }")"

        # we want the sed there, doing with shell builtins would be worse.
        # shellcheck disable=SC2001 disable=SC1117
        echo "${output}" | sed -e "s/\(Program:.*\)(\([0-9\.]*%\) Full)/\1(${PERCENT}% Full)/"
    else
        echo "Unable to determine image size."
    fi
}


find_sketch () {
    SKETCH="${SKETCH:-${DEFAULT_SKETCH}}"
    LIBRARY="${LIBRARY:-${SKETCH}}"
    if [ -z "${SKETCH}" ] || [ -z "${LIBRARY}" ] || [ -z "${ROOT}" ] || [ -z "${SOURCEDIR}" ]; then
        echo "SKETCH, LIBRARY, SOURCEDIR, and ROOT need to be set before including this file!" >&2
        exit 1
    fi

    for path in "examples/${LIBRARY}" \
                    "src" \
		    "."; do
        if [ -f "${path}/${SKETCH}.ino" ]; then
            echo "${path}"
            return
        fi
    done
    echo "I couldn't find your sketch (.ino file)" >&2
    exit 1
}

prepare_to_flash () {
    if [ ! -e "${HEX_FILE_PATH}" ]; then
        compile
        size
    fi

    echo "To update your keyboard's firmware, hold down the 'Prog' key on your keyboard,"
    echo "and then press 'Enter'."
    echo ""
    echo "When the 'Prog' key glows red, you can release it."
    echo ""

    # We do not want to permit line continuations here. We just want a newline.
    # shellcheck disable=SC2162
    read
}

flash () {
    prepare_to_flash

    # This is defined in the (optional) user config.
    # shellcheck disable=SC2154
    ${preFlash_HOOKS}

    reset_device
    sleep 3
    find_bootloader_ports
    check_bootloader_port_and_flash

    # This is defined in the (optional) user config.
    # shellcheck disable=SC2154
    ${postFlash_HOOKS}
}


check_bootloader_port_and_flash () {
    if [ -z "${DEVICE_PORT_BOOTLOADER}" ]; then
        echo "Unable to detect a keyboard in bootloader mode. You may need to hold the 'Prog' key or hit a reset button"
        return 1
    fi
    flash_over_usb || flash_over_usb
}

flash_over_usb () {
    sleep 1
    ${AVRDUDE} -q -q -C "${AVRDUDE_CONF}" -p"${MCU}" -cavr109 -D -P "${DEVICE_PORT_BOOTLOADER}" -b57600 "-Uflash:w:${HEX_FILE_PATH}:i"
}

flash_from_bootloader() {
    prepare_to_flash
    find_bootloader_ports
    check_bootloader_port_and_flash
}

program() {
    prepare_to_flash
    flash_with_programmer
}

flash_with_programmer() {
    ${AVRDUDE} -v \
	       -C "${AVRDUDE_CONF}" \
	       -p"${MCU}" \
	       -cusbtiny \
	       -D \
	       -B 1 \
	       "-Uflash:w:${HEX_FILE_PATH}:i"
}

hex_with_bootloader () {
    if [ ! -e "${HEX_FILE_PATH}" ]; then
        compile
    fi

    awk '/^:00000001FF/ == 0' "${HEX_FILE_PATH}" > "${HEX_FILE_WITH_BOOTLOADER_PATH}"
    echo "Using ${BOOTLOADER_PATH}"
    ${MD5} "${BOOTLOADER_PATH}"
    cat "${BOOTLOADER_PATH}" >> "${HEX_FILE_WITH_BOOTLOADER_PATH}"
    ln -sf -- "${HEX_FILE_WITH_BOOTLOADER_PATH}" "${OUTPUT_PATH}/${SKETCH}-latest-with-bootloader.hex"
    cat <<- EOF

		Combined firmware and bootloader are now at ${HEX_FILE_WITH_BOOTLOADER_PATH}
		Make sure you have the bootloader version you expect.

		And TEST THIS ON REAL HARDWARE BEFORE YOU GIVE IT TO ANYONE

		EOF
}

build () {
    compile "$@"
    size "$@"
}

compile () {
    build_version
    build_paths
    build_filenames
    enable_ccache

    install -d "${OUTPUT_PATH}"

    echo "Building ${SKETCH} (${LIB_VERSION}) ..."

    # This is defined in the (optional) user config.
    # shellcheck disable=SC2154
    ${compile_HOOKS}

    if [ -d "${ARDUINO_LOCAL_LIB_PATH}/libraries" ]; then
        # shellcheck disable=SC2089
        # We want literal backslashes here, not arrays.
        local_LIBS="-libraries \"${ARDUINO_LOCAL_LIB_PATH}/libraries\""
    fi

    ARDUINO_PACKAGES=""
    if [ -d "${ARDUINO_PACKAGE_PATH}" ]; then
        # shellcheck disable=SC2089
        # We want literal backslashes here, not arrays.
	      ARDUINO_PACKAGES="-hardware \"${ARDUINO_PACKAGE_PATH}\""
    fi

    SKETCH_DIR="$(find_sketch)"
    SAVED_BOARD="${BOARD}"
    SAVED_FQBN="${FQBN}"
    if [ -e "${SKETCH_DIR}/.kaleidoscope-builder.conf" ]; then
        # shellcheck disable=SC1090
        BOARD="$(. "${SKETCH_DIR}"/.kaleidoscope-builder.conf && echo "${BOARD}")"
        # shellcheck disable=SC1090
        FQBN="$(. "${SKETCH_DIR}"/.kaleidoscope-builder.conf && echo "${FQBN}")"
        if [ "${SAVED_FQBN}" = "${FQBN}" ] || [ -z "${FQBN}" ]; then
            FQBN="keyboardio:avr:${BOARD}"
        fi
    fi

    # SC2091: We do not care if quotes or backslashes are not respected.
    # SC2086: We want word splitting.
    # shellcheck disable=SC2086,SC2090
    ${ARDUINO_BUILDER} \
        -compile \
	      ${ARDUINO_PACKAGES} \
	      -hardware "${ARDUINO_PATH}/hardware" \
	      -hardware "${BOARD_HARDWARE_PATH}" \
	      ${ARDUINO_TOOLS_PARAM} \
	      -tools "${ARDUINO_PATH}/tools-builder" \
	      -fqbn "${FQBN}" \
        -libraries "." \
        -libraries "${ROOT}" \
	      -libraries "${BOARD_HARDWARE_PATH}/.." \
        ${local_LIBS} \
	      ${EXTRA_BUILDER_ARGS} \
	      -build-cache "${CORE_CACHE_PATH}" \
	      -build-path "${BUILD_PATH}" \
	      -ide-version "${ARDUINO_IDE_VERSION}" \
	      -prefs "compiler.cpp.extra_flags=-std=c++11 -Woverloaded-virtual -Wno-unused-parameter -Wno-unused-variable -Wno-ignored-qualifiers ${ARDUINO_CFLAGS} ${LOCAL_CFLAGS}" \
	      $CCACHE_ENABLE \
	      -warnings all \
        ${ARDUINO_VERBOSE} \
	      ${ARDUINO_AVR_GCC_PREFIX_PARAM} \
	      "${SKETCH_DIR}/${SKETCH}.ino"

    cp "${BUILD_PATH}/${SKETCH}.ino.hex" "${HEX_FILE_PATH}"
    cp "${BUILD_PATH}/${SKETCH}.ino.elf" "${ELF_FILE_PATH}"
    ln -sf "${OUTPUT_FILE_PREFIX}.hex" "${OUTPUT_PATH}/${SKETCH}-latest.hex"
    ln -sf "${OUTPUT_FILE_PREFIX}.elf" "${OUTPUT_PATH}/${SKETCH}-latest.elf"

    echo "Your compiled sketch can be found in ${OUTPUT_PATH}"

    if [ "${ARDUINO_VERBOSE}" = "-verbose" ]; then
	      echo "Build artifacts can be found in ${BUILD_PATH}";
    fi

    BOARD="${SAVED_BOARD}"
    FQBN="${SAVED_FQBN}"
}

_find_all () {
    for plugin in ./*.ino \
  	              $([ -d examples ] && find examples -name '*.ino') \
                  src/*.ino; do
        if [ -d "$(dirname "${plugin}")" ] || [ -f "${plugin}" ]; then
            p="$(basename "${plugin}" .ino)"
            if [ "${p}" != '*' ]; then
                case "${plugin}" in
                    examples/*/${p}/${p}.ino)
                        echo "${plugin}" | sed -e "s,examples/,," | sed -e "s,/${p}\\.ino,,"
                        ;;
                    *)
                        echo "${p}"
                        ;;
                esac
            fi
        fi
    done | sort
}

build_all () {
    plugins="$(_find_all)"

    for plugin in ${plugins}; do
        export SKETCH="${plugin}"
        export LIBRARY="${plugin}"
        $0 "${plugin}" build
    done
}

size () {
    if [ ! -e "${HEX_FILE_PATH}" ]; then
        compile
    fi

    echo "- Size: firmware/${LIBRARY}/${OUTPUT_FILE_PREFIX}.elf"
    # shellcheck disable=SC2086
    firmware_size "${AVR_SIZE}" ${AVR_SIZE_FLAGS} "${ELF_FILE_PATH}"
    echo
}

size_map () {
    if [ ! -e "${HEX_FILE_PATH}" ]; then
        compile
    fi

    "${AVR_NM}" --size-sort -C -r -l -t decimal "${ELF_FILE_PATH}"
}

disassemble () {

    if [ ! -e "${HEX_FILE_PATH}" ]; then
        compile
    fi

    "${AVR_OBJDUMP}" -C -d "${ELF_FILE_PATH}"
}

decompile () {
    disassemble
}

clean () {
    rm -rf -- "${OUTPUT_PATH}"
}

reset_device() {
    find_device_port
    check_device_port
    reset_device_cmd
}

check_device_port () {
    if [ -z "$DEVICE_PORT" ]; then
        cat <<EOF >&2

I couldn't autodetect the keyboard's serial port.

If you see this message and your keyboard is connected to your computer,
it may mean that our serial port detection logic is buggy or incomplete.
In that case, please report this issue at:
	 https://github.com/keyboardio/Kaleidoscope
EOF
        exit 1
    elif echo "$DEVICE_PORT" | grep -q '[[:space:]]'; then
        cat <<EOF >&2
Unexpected whitespace found in detected serial port:

    $DEVICE_PORT

If you see this message, it means that our serial port
detection logic is buggy or incomplete.

Please report this issue at:
	 https://github.com/keyboardio/Kaleidoscope
EOF
        exit 1
    fi

    if ! [ -w "$DEVICE_PORT" ]; then
        cat <<EOF >&2

In order to update your keyboard's firmware you need to have permission
to write to its serial port $DEVICE_PORT.

It appears that you do not have this permission:

  $(ls -l "$DEVICE_PORT")

This may be because you're not in the correct unix group:

  $(stat -c %G "$DEVICE_PORT").

You are currently in the following groups:

  $(id -Gn)

Please ensure you have followed the instructions on setting up your
account to be in the right group:

https://github.com/keyboardio/Kaleidoscope/wiki/Install-Arduino-support-on-Linux

EOF
        exit 1
    fi
}

usage () {
    cat <<- EOF
		Usage: $0 SKETCH commands...

		Runs all of the commands in the context of the Sketch.

		Available commands:

		  help
		    This help screen.

		  compile
		    Compiles the sketch.

		  size
		    Reports the size of the compiled sketch.

		  build
		    Runs compile and report-size.

		  clean
		    Cleans up the output directory.

		  size-map
		    Displays the size map for the sketch.

		  disassemble
		    Decompile the sketch.

		  reset-device
		    Reset the device.

		  flash
		    Flashes the firmware using avrdude.

		  build-all
		    Build all Sketches we can find.
		EOF
}

help () {
    usage
}

if [ $# -lt 1 ]; then
    usage
    exit 1
fi

## Parse the command-line
##  - anything that has a =, is an env var
##  - from the remaining stuff, the first one is the Library/Sketch
##  - everything else are commands
##
##  - if there is only one argument, that's a command

ROOT="$(cd "$(dirname "$0")"/..; pwd)"
export ROOT
# shellcheck disable=SC2155
export SOURCEDIR="$(pwd)"

if [ -e "${HOME}/.kaleidoscope-builder.conf" ]; then
    # shellcheck disable=SC1090
    . "${HOME}/.kaleidoscope-builder.conf"
fi

if [ -e "${SOURCEDIR}/.kaleidoscope-builder.conf" ]; then
    # shellcheck disable=SC1090
    . "${SOURCEDIR}/.kaleidoscope-builder.conf"
fi

if [ -e "${SOURCEDIR}/kaleidoscope-builder.conf" ]; then
    # shellcheck disable=SC1090
    . "${SOURCEDIR}/kaleidoscope-builder.conf"
fi

# shellcheck disable=SC1090
. "${ROOT}/etc/kaleidoscope-builder.conf"

if [ ! -z "${VERBOSE}" ] && [ "${VERBOSE}" -gt 0 ]; then
    ARDUINO_VERBOSE="-verbose"
else
    ARDUINO_VERBOSE="-quiet"
fi

cmds=""

## Export vars
for i in $(seq 1 $#); do
    v="$1"
    shift

    case "${v}" in
        *=*)
            # Exporting an expansion is *precisely* what we want here.
            # shellcheck disable=SC2086,SC2163
            export ${v}
            ;;
        *)
            cmds="${cmds} ${v}"
            ;;
    esac
done

# Word splitting is desired here.
# shellcheck disable=SC2086
set -- ${cmds}

if [ $# -eq 1 ]; then
    cmd="$(echo "$1" | tr '-' '_')"
    ${cmd}
    exit $?
fi

SKETCH="$1"
shift

if [ "${SKETCH}" = "default" ]; then
    SKETCH="${DEFAULT_SKETCH}"
fi

cmds=""

# shellcheck disable=2034
for i in $(seq 1 $#); do
    cmds="${cmds} $(echo "$1" | tr '-' '_')"
    shift
done

LIBRARY="${SKETCH}"

case "${SKETCH}" in
    */*)
        SKETCH="$(basename "${SKETCH}")"
        ;;
esac

export SKETCH
export LIBRARY

for cmd in ${cmds}; do
    ${cmd}
done