#!/bin/bash

# if [ ${git_helpers_sourced:-1} = "1" ]; then
#    readonly git_helpers_sourced=${BASH_SOURCE[0]}
#else
#    return 0
#fi

source ./general_utils

exec_opkg_command () {
    local func="${FUNCNAME[0]}"
    log_debug "$func:${LINENO} exec-ing [$*]"

    local __result=$(exec_process_substitution $*)
    local __result_code=$?

    log_debug "$func:${LINENO} result=$__result"

    printf '%s' "$__result"
    return $__result_code
}

# Fetch/merge updates from predefined repository using git.
# 
fetch_customer_updates() {
    if ! pull_customer_repository; then
        return 1
    fi
    return 0
}

copy () {
    local func="${FUNCNAME[0]}"
    local copy_necessary=0

    readarray -td' ' files <<< "$1"
    for f in ${files[@]}; do
        log_debug "$func:${LINENO}: $f"
        # $f is determined by git
        if [[ "$f" =~ .*update[.]conf.* ]]; then
            continue
        fi

        # TODO: szeged darf nicht sein
        # local readonlt __cl=$CUSTOMER_LOCATION
        # local readonly __q="'"
        # xxx='$('"echo $f | sed -E -e ${__q}s=(.*$__cl/[0-9]/[0-9])(.*)(/.*)=\2=g$__q"')'
        # echo $xxx
        # eval "echo $xxx"

        local readonly __sysdir=$(echo $f |
                            sed -E -e s'=(.*szeged/[0-9]/[0-9])(.*)(/.*)=\2=g')

        # TODO: kuerzen
    
        copy_necessary=1

        PERCENT=$((PERCENT+1))
        test $PERCENT -gt 100 && PERCENT=100

        local readonly __f=${f##*/}
        local readonly __m="${CUSTOMER_ID_BASE_DIR}/${f}"
        local __p="${__sysdir}/${__f}"

        # echo "TEST -> $sysdir/$__f"

        # TODO: das kopieren in die system-verzeichnisse muss noch getestet
        # werden. stimmt noch nicht so ganz.
                
        #if grep -qE "^.*$DC\s*$" <<< ${f}; then
        #    __p="${DC_SYS_DIR}/${__f}"
        #    log_debug "$func:${LINENO}: __m=$__m"
        #elif grep -qE "^.*tariff[0-9][0-9][.]json\s*$" <<< ${f}; then
        #    __p="${TARIFF_SYS_DIR}/${__f}"
        #elif grep -qE "^.*[.]json\s*$" <<< ${f}; then
        #    __p="${CONF_SYS_DIR}/${__f}"
        #    log_debug "$func:${LINENO}: __m=$__m"
        #elif grep -qE "^.*[.]ini\s*$" <<< ${f}; then
        #    if [ "$__f" = "$ATBQT_INI" ]; then
        #        log_debug "$func:${LINENO}: __m=$__m $ATB_SYS_DIR/$__f ${f%/*}"
        #        if grep -qE "$ATB_SYS_DIR" <<< "${f%/*}"; then
        #            __p="$ATB_SYS_DIR/${__f}"
        #        else
        #            __p="$ATBAPP_SYS_DIR/${__f}"
        #        fi
        #    elif [ "$__f" = "$SYSTEM_CONTROL_INI" ]; then
        #        if grep -qE "$ATB_SYS_DIR" <<< "${f%/*}"; then
        #            __p="$ATB_SYS_DIR/${__f}"
        #        else
        #            __p="$SYSCONFIG_SYS_DIR/${__f}"
        #        fi
        #    elif [ "$__f" = "$SYS_CONFIG_INI" ]; then
        #        if grep -qE "$ATB_SYS_DIR" <<< "${f%/*}"; then
        #            __p="$ATB_SYS_DIR/${__f}"
        #        else
        #            __p="$SYSCONFIG_SYS_DIR/${__f}"
        #        fi
        #    elif [ "$__f" = "$ISMASMGR_INI" ]; then
        #        if grep -qE "$ISMASMGR_SYS_DIR" <<< "${f%/*}"; then
        #            __p="$ISMASMGR_SYS_DIR/${__f}"
        #        elif grep -qE "$ATB_SYS_DIR" <<< "${f%/*}"; then
        #            __p="$ATB_SYS_DIR/${__f}"
        #        else
        #            __p="$SYSCONFIG_SYS_DIR/${__f}"
        #        fi
        #    fi
        #fi

        echo "XXX-- __p=$__p"
            
        if [ ! -z "$__p" ]; then
            if cp "$__m" "$__p"; then
                log_info "$func:${LINENO}: cp $__m $__p ok"
                update_psa_copy_conf_and_ini_files $UPDATE_ISMAS_PROGRESS \
                    $RC_SUCCESS "cp $__m $__p ok"
            else
                log_error "$func:${LINENO}: cp $__m $__p failed: error-code=$?"
                update_psa_copy_conf_and_ini_files \
                    $UPDATE_ISMAS_ERROR $RC_COPY_ERROR "cp $__m $__p failed"
                return $?
            fi
        else
            log_error "$func:${LINENO}: __p still empty"
            update_psa_copy_conf_and_ini_files \
                $UPDATE_ISMAS_ERROR $RC_COPY_ERROR "__p still empty"
            EXITCODE=$((EXITCODE+1))
            return $EXITCODE
        fi
    done
    
    if [ $copy_necessary -eq 0 ]; then
        update_psa_copy_conf_and_ini_files $UPDATE_ISMAS_PROGRESS $RC_SUCCESS \
            "no copy of json/ini-files necessary"
        log_debug "$func:${LINENO}: no copy of conf/ini-files necessary"
    else
        log_debug "$func:${LINENO}: copied *conf/*ini-files to system-dirs"
    fi

    return 0
}
    
filter_changed_files () {
    local func="${FUNCNAME[0]}"
    log_debug "$func:${LINENO} $1"
    readarray -td' ' files <<< "$1"
    local __system_files=""
    for f in ${files[@]}; do
        log_debug "$func:${LINENO} $f"
        if grep -qE "^.*[.]($2)\s*$" <<< $f; then
            if [ -z $__system_files ]; then
                __system_files="${f}"
            else
                __system_files="$__system_files ${f}"
            fi
        fi
    done

    log_debug "$func:${LINENO} system-files=$__system_files"
    printf '%s' "$__system_files"
}

#
md5_of () {
    printf '%s' "$(md5sum "$1" | cut -d' ' -f1)"
}

# Check if the fetched/merged files have the correct md5 and are
# valid for the PSA.
#
check_md5_for_changed_json_and_ini_files () {
    local func="${FUNCNAME[0]}"
    local js_key="" # used by json-parser 'jq'
    local md5sum_update_conf=""
    local md5sum_repository=""
    local readonly cut_md5="cut -d' ' -f1"
    log_debug "$func:${LINENO} files=$1"
    if ! [ -z $1 ]; then
        readarray -td' ' files <<< "$1"
        local readonly __cl=$CUSTOMER_LOCATION
        for file in ${files[@]}; do
            # .../szeged/1/1...
            log_debug "$func:${LINENO} checking file=${file}..."
            local __fs=${file##*.}

            js_key=""

            case $file in
                *.ini | *.json | *.hex)
                    local __key_suffix=$(echo $file |
                    sed -E -e 's=(.*[0-9]/[0-9])([^.]+)(.*)=\2=g' -e 's=/=.=g')
                    js_key=".$__fs.$__cl.zg[$ZONE_GROUP].z[$ZONE]$__key_suffix"
                    md5sum_update_conf=$(cat $PSA_UPDATE_CONF | jq -r $js_key)
                    md5sum_repository="$(md5_of $CUSTOMER_ID_BASE_DIR/$file)"
                    ;;
                *)
                    log_crit "$func:${LINENO} unknown file=${file}"
                    ;;    
            esac

            test -z $js_key && continue
                
            PERCENT=$((PERCENT+1))
            test $PERCENT -gt 100 && PERCENT=100

            if [ "$md5sum_repository" = "$md5sum_update_conf" ]; then
                log_info "$func:${LINENO}: md5sum for $file ok"
                update_psa_check_hash $UPDATE_ISMAS_PROGRESS $RC_SUCCESS \
                    "md5sum -|$md5sum_repository|- for $file ok"
            else
                local __r="repository: $md5sum_repository"
                local __u="update.conf=$md5sum_update_conf"
                local __m="$__r != $__u"
                log_error "$func:${LINENO}: md5sum for $file wrong: $__m"
                update_psa_check_hash $UPDATE_ISMAS_ERROR $RC_HASH_VALUE_ERROR \
                    "md5sum -|$md5sum_repository|- for $file wrong"
                return $?
            fi
        done
    else
        log_debug "$func:${LINENO} no changed conf-/ini-files"
    fi
    return 0
}

check_hardware_compatibility () {
    local func="${FUNCNAME[0]}"
    # RC_HW_COMPATIBILITY_ERROR=6
    update_psa_check_hardware_compatibility $UPDATE_ISMAS_PROGRESS \
        $RC_SUCCESS "TODO: hardware compatibility"
    return $?
}

check_md5_for_opkg_packages () {
    local func="${FUNCNAME[0]}"
    local -n opkg_output_ref=$1
    local package=""
    local md5sum_opkg_info=""
    local filename=""
    for line in ${opkg_output_ref[@]}; do
        log_info "$func:${LINENO}: line=$line"
        if grep -qE "^\s*Package\s*:.*?$" <<< "$line"; then
            package=${line#*:* }
        elif grep -qE "^\s*MD5Sum\s*:.*?$" <<< "$line"; then
            md5sum_opkg_info=${line#*:* }
        elif grep -qE "^\s*Filename\s*:.*?$" <<< "$line"; then
            filename=${line#*:* }
        fi
    done

    local __update_conf="${CUSTOMER_LOCATION_DIR}/update.conf"
    md5sum_repo=$(cat $__update_conf | jq -r .opkg.${package}.MD5Sum)
    if ! [ -z $md5sum_repo ]; then
        if [ "$md5sum_opkg_info" = "$md5sum_repo" ]; then
            log_info "$func:${LINENO}: md5 $md5sum_repo OK for $package"
            return 0
        else
            log_error "$func:${LINENO}: md5sum_repo [$md5sum_repo] "\
                "!= md5sum_opkg_info [$md5sum_opkg_info] for $package"
        fi
    else
        log_error "$func:${LINENO}: md5sum_repo empty"
    fi

    return 1
}

# In case the new checked-out files are not correct, revert the git
# repository to its previous state.
#
revert_customer_repository () {
    local func="${FUNCNAME[0]}"
    # TODO
    return 0
}

# Backup before the update-process. 
#
backup_previous_version () {
    local func="${FUNCNAME[0]}"
    # TODO
    return 0
}

exec_opkg_info () {
    local func="${FUNCNAME[0]}"
    log_info "$func:${LINENO}: executing info $1"
    
    opkg_result=$(exec_opkg_command "opkg info $1")
    if [ $? -eq 0 ]; then
        # make sure the keywords start with '\n'
        opkg_result=$(sed -E -e "s/(^.*)(Package)(.*$)/\n\2\3/g"\
                -e "s/(^.*)(Version)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Depends)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Status)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Architecture)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Maintainer)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(MD5Sum)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Filename)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Source)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Description)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Installed-Size)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Section)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*[^-])(Size)(.*$)/\1\n\2\3/g"\
                -e "s/(^.*)(Installed-Time)(.*$)/\1\n\2\3/g"
                    <<< "$opkg_result")

        local -n output_ref=$2

        readarray -d $'\n' output_ref < <(printf '%s' "$opkg_result")
        if [ $? -ne 0 ]; then
            log_error "$func:${LINENO}: readarray finished with error"
            return 1
        fi
    
        log_info "$func:${LINENO}: ... done"
        # log_info "$func:${LINENO}: opkg_result=${output_ref[@]}"
        return 0
    fi

    log_error "$func:${LINENO}: executing info $1"
    return 1
}

# Try to install new opkg-packages (in case the are some
# in the new git-checkout).
#
exec_opkg_noaction() {
    local func="${FUNCNAME[0]}"
    local opkg_command_no_action="opkg --noaction $1"
    log_debug "$func:${LINENO}: executing $opkg_command_no_action"
    
    local __opkg_result=$(exec_opkg_command "opkg --noaction $1")
    if [ $? -eq 0 ]; then
        log_info "$func:${LINENO}: opkg_result=$__opkg_result"
        return 0
    fi

    log_error "$func:${LINENO}: error executing opkg --noaction $1"
    return 1
}

# Install the new packages using opkg. 
#
exec_opkg () {
    local func="${FUNCNAME[0]}"
    log_debug "$func:${LINENO}: executing $1"
    
    local __opkg_result=$(exec_opkg_command "opkg $1")
    if [ $? -eq 0 ]; then
        log_info "$func:${LINENO}: opkg_result=$__opkg_result"
        return 0
    fi

    log_error "$func:${LINENO}: error executing $1"
    return 1
}

# In case there was some error, re-install the previous package(s)
# and use the backup to restore any conf/ini-files.
#
fallback_to_previous_version() {
    local func="${FUNCNAME[0]}"
    # TODO
    return 0;
}

# If all went well, then execute all necessary cleanup steps.
#
cleanup_previous_version() {
    local func="${FUNCNAME[0]}"
    # TODO
    return 0
}

check_for_apism () {
    local func="${FUNCNAME[0]}"
    if nc localhost 7778; then
        APISM_RUNNING=1
        log_debug "$func:${LINENO}: APISM running..."
        return 0
    else
        log_crit "$func:${LINENO}: *************************"
        log_crit "$func:${LINENO}: !!! APISM NOT RUNNING !!!"
        log_crit "$func:${LINENO}: *************************"
    fi
    return 1
}

check_default_route () {
    if ip route | head -n 1 | grep -q '^default'
        log_debug "$func:${LINENO}: default route set"
        return 0
    then
        log_crit "$func:${LINENO}: ***************************************"
        log_crit "$func:${LINENO}: !!! NO DEFAULT ROUTE SET !!! Exiting..."
        log_crit "$func:${LINENO}: ***************************************"
        exit 1
    fi
}

check_route_to_repository () {
    # ip_address=$1, e.g. git.mimbach.de (185.191.219.134)
    # 185.191.219.134 via 192.168.5.254 ...
    if test "$#" -eq 1 && ip route get "$1" | head -n 1 | grep -q "^$1"
        log_debug "$func:${LINENO}: route to repository available"
        return 0
    then
        log_crit "$func:${LINENO}: ***************************************"
        log_crit "$func:${LINENO}: !!! NO ROUTE TO REPO SET !!! Exiting..."
        log_crit "$func:${LINENO}: ***************************************"
        exit 1
    fi
}

get_customer_id () {
    echo $(cat CUST_ID_FILE)
}

get_zone_nr () {
    echo $(cat ZONE_FILE)
}

get_plugins () {
    local __plugins=""
    for __f in /opt/app/ATBAPP/plugins/*; do
        local plugin=$__f
        plugins+="
            \"${plugin##*/}\": {
        "
        plugins+=$(strings $__f             |
                   grep -A4 \"Interface\":  |
                   grep \"Version\"         |
                   sed -E -e 's/^\s*/\n/g')
        # remove trailing ',' which is already contained in returned value
        plugins=${plugins/%,}
        plugins+="
        },"
    done
    printf '%s' ${plugins/%,}
}
# get_plugins