#!/bin/bash

# This script helps to build release artifacts.
# arg1: profile, e.g. emqx | emqx-edge | emqx-pkg | emqx-edge-pkg
# arg2: artifact, e.g. rel | relup | zip | pkg

set -euo pipefail

PROFILE="$1"
ARTIFACT="$2"

# ensure dir
cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")"

PKG_VSN="${PKG_VSN:-$(./pkg-vsn.sh)}"
export PKG_VSN

SYSTEM="$(./scripts/get-distro.sh)"

ARCH="$(uname -m)"
case "$ARCH" in
    x86_64)
        ARCH='amd64'
        ;;
    aarch64)
        ARCH='arm64'
        ;;
    arm*)
        ARCH=arm
        ;;
esac
export ARCH

##
## Support RPM and Debian based linux systems
##
if [ "$(uname -s)" = 'Linux' ]; then
    case "${SYSTEM:-}" in
        ubuntu*|debian*|raspbian*)
            PKGERDIR='deb'
            ;;
        *)
            PKGERDIR='rpm'
            ;;
    esac
fi

log() {
    local msg="$1"
    # rebar3 prints ===>, so we print ===<
    echo "===< $msg"
}

make_doc() {
    local libs_dir1 libs_dir2
    libs_dir1="$(find "_build/default/lib/" -maxdepth 2 -name ebin -type d)"
    libs_dir2="$(find "_build/$PROFILE/lib/" -maxdepth 2 -name ebin -type d)"

    local conf_doc_md
    # TODO render md as html
    conf_doc_md="$(pwd)/_build/${PROFILE}/lib/emqx_dashboard/priv/config.md"
    echo "===< Generating config document $conf_doc_md"
    # shellcheck disable=SC2086
    erl -noshell -pa $libs_dir1 $libs_dir2 -eval "ok = emqx_conf:gen_doc(\"${conf_doc_md}\"), halt(0)."
}

make_rel() {
    # shellcheck disable=SC1010
    ./rebar3 as "$PROFILE" do tar
    if [ "$(find "_build/$PROFILE/rel/emqx/lib/" -maxdepth 1 -name 'gpb-*' -type d)" != "" ]; then
        echo "gpb should not be included in the release"
        exit 1
    fi
}

## unzip previous version .zip files to _build/$PROFILE/rel/emqx/releases before making relup
make_relup() {
    local lib_dir="_build/$PROFILE/rel/emqx/lib"
    local releases_dir="_build/$PROFILE/rel/emqx/releases"
    mkdir -p "$lib_dir" "$releases_dir"
    local releases=()
    if [ -d "$releases_dir" ]; then
        while read -r zip; do
            local base_vsn
            base_vsn="$(echo "$zip" | grep -oE "[0-9]+\.[0-9]+(\.[0-9]+|(-(alpha|beta)\.[0-9]))(-[0-9a-e]{8})?")"
            if [ ! -d "$releases_dir/$base_vsn" ]; then
                local tmp_dir
                tmp_dir="$(mktemp -d -t emqx.XXXXXXX)"
                unzip -q "$zip" "emqx/releases/*" -d "$tmp_dir"
                unzip -q "$zip" "emqx/lib/*" -d "$tmp_dir"
                cp -r -n "$tmp_dir/emqx/releases"/* "$releases_dir"
                cp -r -n "$tmp_dir/emqx/lib"/* "$lib_dir"
                rm -rf "$tmp_dir"
            fi
            releases+=( "$base_vsn" )
        done < <(find _upgrade_base -maxdepth 1 -name "*$PROFILE-otp${OTP_VSN}-$SYSTEM*-$ARCH.zip" -type f)
    fi
    if [ ${#releases[@]} -eq 0 ]; then
        log "No upgrade base found, relup ignored"
        return 0
    fi
    RELX_BASE_VERSIONS="$(IFS=, ; echo "${releases[*]}")"
    export RELX_BASE_VERSIONS
    ./rebar3 as "$PROFILE" relup --relname emqx --relvsn "${PKG_VSN}"
}

cp_dyn_libs() {
    local rel_dir="$1"
    local target_dir="${rel_dir}/dynlibs"
    if ! [ "$(uname -s)" = 'Linux' ]; then
        return 0;
    fi
    mkdir -p "$target_dir"
    while read -r so_file; do
        cp -L "$so_file" "$target_dir/"
    done < <(find "$rel_dir" -type f \( -name "*.so*" -o -name "beam.smp" \) -print0 \
        | xargs -0 ldd \
        | grep -E '(libcrypto)|(libtinfo)' \
        | awk '{print $3}' \
        | sort -u)
}

## make_zip turns .tar.gz into a .zip with a slightly different name.
## It assumes the .tar.gz has been built -- relies on Makefile dependency
make_zip() {
    # build the tarball again to ensure relup is included
    make_rel

    tard="/tmp/emqx_untar_${PKG_VSN}"
    rm -rf "${tard}"
    mkdir -p "${tard}/emqx"
    local relpath="_build/${PROFILE}/rel/emqx"
    local pkgpath="_packages/${PROFILE}"
    mkdir -p "${pkgpath}"
    local tarball="${relpath}/emqx-${PKG_VSN}.tar.gz"
    if [ ! -f "$tarball" ]; then
        log "ERROR: $tarball is not found"
    fi
    local zipball
    zipball="${pkgpath}/${PROFILE}-${PKG_VSN}-otp${OTP_VSN}-${SYSTEM}-${ARCH}.zip"
    tar zxf "${tarball}" -C "${tard}/emqx"
    ## try to be portable for zip packages.
    ## for DEB and RPM packages the dependencies are resoved by yum and apt
    cp_dyn_libs "${tard}/emqx"
    (cd "${tard}" && zip -qr - emqx) > "${zipball}"
    log "Zip package successfully created: ${zipball}"
}

## This function builds the default docker image based on alpine:3.14 (by default)
make_docker() {
    EMQX_BUILDER="${EMQX_BUILDER:-${EMQX_DEFAULT_BUILDER}}"
    EMQX_RUNNER="${EMQX_RUNNER:-${EMQX_DEFAULT_RUNNER}}"
    set -x
    docker build --no-cache --pull \
       --build-arg BUILD_FROM="${EMQX_BUILDER}" \
       --build-arg RUN_FROM="${EMQX_RUNNER}" \
       --build-arg EMQX_NAME="$PROFILE" \
       --tag "emqx/$PROFILE:${PKG_VSN}" \
       -f "${DOCKERFILE}" .
}

## This function accepts any base docker image,
## a emqx zip-image, and a image tag (for the image to be built),
## to build a docker image which runs EMQ X
##
## Export below variables to quickly build an image
##
## Name               Default                         Example
## ---------------------------------------------------------------------
## EMQX_BASE_IMAGE    current os                      centos:7
## EMQX_ZIP_PACKAGE   _packages/<current-zip-target>  /tmp/emqx-4.4.0-otp23.3.4.9-3-centos7-amd64.zip
## EMQX_IMAGE_TAG     emqx/emqx:<current-vns-rel>     emqx/emqx:testing-tag
##
make_docker_testing() {
    if [ -z "${EMQX_BASE_IMAGE:-}" ]; then
        case "$SYSTEM" in
            ubuntu20*)
                EMQX_BASE_IMAGE="ubuntu:20.04"
                ;;
            centos8)
                EMQX_BASE_IMAGE="centos:8"
                ;;
            *)
                echo "Unsupported testing base image for $SYSTEM"
                exit 1
                ;;
        esac
    fi
    EMQX_IMAGE_TAG="${EMQX_IMAGE_TAG:-emqx/$PROFILE:${PKG_VSN}-otp${OTP_VSN}-${SYSTEM}}"
    local defaultzip
    defaultzip="_packages/${PROFILE}/${PROFILE}-${PKG_VSN}-otp${OTP_VSN}-${SYSTEM}-${ARCH}.zip"
    local zip="${EMQX_ZIP_PACKAGE:-$defaultzip}"
    if [ ! -f "$zip" ]; then
        log "ERROR: $zip not built?"
        exit 1
    fi
    set -x
    docker build \
       --build-arg BUILD_FROM="${EMQX_BASE_IMAGE}" \
       --build-arg EMQX_ZIP_PACKAGE="${zip}" \
       --tag "$EMQX_IMAGE_TAG" \
       -f "${DOCKERFILE_TESTING}" .
}

log "building artifact=$ARTIFACT for profile=$PROFILE"

case "$ARTIFACT" in
    doc)
        make_doc
        ;;
    rel)
        make_rel
        ;;
    relup)
        make_relup
        ;;
    zip)
        make_zip
        ;;
    pkg)
        if [ -z "${PKGERDIR:-}" ]; then
            log "Skipped making deb/rpm package for $SYSTEM"
            exit 0
        fi
        make -C "deploy/packages/${PKGERDIR}" clean
        EMQX_REL="$(pwd)" EMQX_BUILD="${PROFILE}" SYSTEM="${SYSTEM}" make -C "deploy/packages/${PKGERDIR}"
        ;;
    docker)
        make_docker
        ;;
    docker-testing)
        make_docker_testing
        ;;
    *)
        log "Unknown artifact $ARTIFACT"
        exit 1
        ;;
esac