#!/bin/bash
#
#  Copyright (c) 2019, The OpenThread Authors.
#  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions are met:
#  1. Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#  2. Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#  3. Neither the name of the copyright holder nor the
#     names of its contributors may be used to endorse or promote products
#     derived from this software without specific prior written permission.
#
#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#  POSSIBILITY OF SUCH DAMAGE.
#

set -euo pipefail

readonly OT_TMP_DIR=/tmp/ot-size-report
readonly OT_SHA_NEW=${GITHUB_SHA:-$(git rev-parse HEAD)}
readonly OT_SHA_OLD="$(git cat-file -p "${OT_SHA_NEW}" | grep 'parent ' | head -n1 | cut -d' ' -f2)"
readonly OT_REPORT_FILE=/tmp/size_report

setup_arm_gcc_7()
{
    if arm-none-eabi-gcc --version | grep -q 'Arm Embedded Processors 7'; then
        return 0
    fi

    (cd /tmp/ \
        && wget https://developer.arm.com/-/media/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2 \
        && tar xjf gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2)
    export PATH=/tmp/gcc-arm-none-eabi-7-2018-q2-update/bin:$PATH

    arm-none-eabi-gcc --version
}

setup()
{
    setup_arm_gcc_7
}

markdown_init()
{
    echo '|  name  |  branch  |  text  | data  | bss  | total |'
    echo '| :----: | :------: | -----: | ----: | ---: | ----: |'
}

markdown_size()
{
    local name
    name=$(basename "$1")

    read -r -a size_old <<<"$(size "$1" | awk '{text+=$1} {bss+=$2} {data+=$3} {total+=$4} END {printf "%d %d %d %d", text, bss, data, total}')"
    read -r -a size_new <<<"$(size "$2" | awk '{text+=$1} {bss+=$2} {data+=$3} {total+=$4} END {printf "%d %d %d %d", text, bss, data, total}')"

    local -a size_diff

    for i in 0 1 2 3; do
        size_diff[$i]="$((size_new["$i"] - size_old["$i"]))"
        if [[ ${size_diff["$i"]} != 0 ]]; then
            size_diff["$i"]=$(printf '%+d' "${size_diff["$i"]}")
        fi
    done

    echo "| ${name} | -${OT_SHA_OLD:0:7} | ${size_old[0]} | ${size_old[1]} | ${size_old[2]} | ${size_old[3]} |"
    echo "|  | +${OT_SHA_NEW:0:7} | ${size_new[0]} | ${size_new[1]} | ${size_new[2]} | ${size_new[3]} |"
    echo "|  | +/- | ${size_diff[0]} | ${size_diff[1]} | ${size_diff[2]} | ${size_diff[3]} |"
}

markdown()
{
    case "$1" in
        init)
            shift
            markdown_init "$@" >"${OT_REPORT_FILE}"
            ;;
        size)
            shift
            markdown_size "$@" >>"${OT_REPORT_FILE}"
            ;;
        post)
            mdv "${OT_REPORT_FILE}"
            ;;
    esac
}

size_nrf52840()
{
    local flags=(
        "BORDER_AGENT=1"
        "BORDER_ROUTER=1"
        "CHANNEL_MANAGER=1"
        "CHANNEL_MONITOR=1"
        "CHILD_SUPERVISION=1"
        "COAP=1"
        "COAPS=1"
        "COMMISSIONER=1"
        "DHCP6_CLIENT=1"
        "DHCP6_SERVER=1"
        "DIAGNOSTIC=1"
        "DISABLE_DOC=1"
        "DNS_CLIENT=1"
        "ECDSA=1"
        "FULL_LOGS=1"
        "JAM_DETECTION=1"
        "JOINER=1"
        "LINK_RAW=1"
        "MAC_FILTER=1"
        "MTD_NETDIAG=1"
        "SERVICE=1"
        "SLAAC=1"
        "SNTP_CLIENT=1"
        "TIME_SYNC=1"
        "UDP_FORWARD=1"
    )

    rm -rf "${OT_TMP_DIR}"

    # new commit
    mkdir -p "${OT_TMP_DIR}/b"
    git archive "${OT_SHA_NEW}" | tar x -C "${OT_TMP_DIR}/b"

    (cd "${OT_TMP_DIR}/b" \
        && ./bootstrap \
        && make -f examples/Makefile-nrf52840 "${flags[@]}")

    # old commit
    if [[ "${GITHUB_ACTIONS+x}" ]]; then
        git fetch --depth 1 --no-recurse-submodules origin "${OT_SHA_OLD}"
    fi

    mkdir -p "${OT_TMP_DIR}/a"
    git archive "${OT_SHA_OLD}" | tar x -C "${OT_TMP_DIR}/a"
    (cd "${OT_TMP_DIR}/a" \
        && ./bootstrap \
        && make -f examples/Makefile-nrf52840 "${flags[@]}")

    local reporter

    # not on GitHub Actions or not a pull request event
    if [[ ! ${GITHUB_ACTIONS+x} || ! ${GITHUB_REF-} =~ ^refs/pull/[0-9]+/merge ]]; then
        reporter=markdown
    else
        reporter=./size-report
        curl -s --retry 5 "${SIZE_REPORT_URL}/bash" >size-report
        chmod a+x size-report
        export OT_SHA_NEW OT_SHA_OLD
    fi

    "${reporter}" init OpenThread

    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/bin/ot-cli-ftd "${OT_TMP_DIR}"/b/output/nrf52840/bin/ot-cli-ftd
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/bin/ot-cli-mtd "${OT_TMP_DIR}"/b/output/nrf52840/bin/ot-cli-mtd
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/bin/ot-ncp-ftd "${OT_TMP_DIR}"/b/output/nrf52840/bin/ot-ncp-ftd
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/bin/ot-ncp-mtd "${OT_TMP_DIR}"/b/output/nrf52840/bin/ot-ncp-mtd
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/bin/ot-rcp "${OT_TMP_DIR}"/b/output/nrf52840/bin/ot-rcp

    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-cli-ftd.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-cli-ftd.a
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-cli-mtd.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-cli-mtd.a
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-ftd.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-ftd.a
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-mtd.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-mtd.a
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-ncp-ftd.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-ncp-ftd.a
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-ncp-mtd.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-ncp-mtd.a
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-rcp.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-rcp.a
    "${reporter}" size "${OT_TMP_DIR}"/a/output/nrf52840/lib/libopenthread-radio.a "${OT_TMP_DIR}"/b/output/nrf52840/lib/libopenthread-radio.a

    "${reporter}" post
}

main()
{
    if [[ $# == 0 ]]; then
        setup
        size_nrf52840
    elif [[ $1 == setup ]]; then
        setup
    elif [[ $1 == nrf52840 ]]; then
        size_nrf52840
    else
        echo "USAGE: $0 [setup|nrf52840]"
        exit 128
    fi
}

main "$@"