#!/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 $1; 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
    
        copy_necessary=1

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

        local __f=${f##*/}
        local __m=""
        local __copy_error=0

        if grep -qE "^.*$DC\s*$" <<< ${f}; then
            __m="cp ${CUSTOMER_ID_BASE_DIR}/${f} to ${DC_SYS_DIR}/${__f}"
            cp "${CUSTOMER_ID_BASE_DIR}/${f}" "${DC_SYS_DIR}/${__f}"
            __copy_error=$?
        elif grep -qE "^.*[.]json\s*$" <<< ${f}; then
            __m="cp ${CUSTOMER_ID_BASE_DIR}/${f} to ${CONF_SYS_DIR}/${__f}"
            cp "${CUSTOMER_ID_BASE_DIR}/${f}" "${CONF_SYS_DIR}/${__f}"
            __copy_error=$?
        elif grep -qE "^.*[.]ini\s*$" <<< ${f}; then
            if [ "$__f" = "$ATBQT_INI" ]; then
                __m="cp ${CUSTOMER_ID_BASE_DIR}/${f} $ATBAPP_SYS_DIR/${__f}"
                cp "${CUSTOMER_ID_BASE_DIR}/${f}" $ATBAPP_SYS_DIR/${__f}
                __copy_error=$?
            elif [ "$__f" = "$SYSTEM_CONTROL_INI" ]; then
                __m="cp ${CUSTOMER_ID_BASE_DIR}/${f} $SYSCONFIG_SYS_DIR/${__f}"
                cp "${CUSTOMER_ID_BASE_DIR}/${f}" $SYSCONFIG_SYS_DIR/${__f}
                __copy_error=$?
            elif [ "$__f" = "$SYS_CONFIG_INI" ]; then
                __m="cp ${CUSTOMER_ID_BASE_DIR}/${f} $SYSCONFIG_SYS_DIR/${__f}"
                cp "${CUSTOMER_ID_BASE_DIR}/${f}" $SYSCONFIG_SYS_DIR/${__f}
                __copy_error=$?
            elif [ "$__f" = "$ISMASMGR_INI" ]; then
                if grep -qE "$ISMASMGR_SYS_DIR" <<< "${f%/*}"; then
                    __m="cp ${CUSTOMER_ID_BASE_DIR}/${f}"
                    __m="$__m $ISMASMGR_SYS_DIR/${__f}"
                    cp "${CUSTOMER_ID_BASE_DIR}/${f}" $ISMASMGR_SYS_DIR/${__f}
                    __copy_error=$?
                else
                    __m="cp ${CUSTOMER_ID_BASE_DIR}/${f}"
                    __m="$__m $SYSCONFIG_SYS_DIR/${__f}"
                    cp "${CUSTOMER_ID_BASE_DIR}/${f}" $SYSCONFIG_SYS_DIR/${__f}
                    __copy_error=$?
                fi
            fi
        fi

        if [ $__copy_error -ne 0 ]; then
            log_error "$func:${LINENO}: $__m failed"
            update_psa_copy_conf_and_ini_files \
                $UPDATE_ISMAS_ERROR $RC_COPY_ERROR "$__m failed"
            return $?
        else
            log_info "$func:${LINENO}: $__m ok"
            update_psa_copy_conf_and_ini_files $UPDATE_ISMAS_PROGRESS \
                $RC_SUCCESS "$__m ok"
        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 ${files[@]}; do
            log_debug "$func:${LINENO} checking file=${file}..."
            local __fsuffix=${file##*.}
            local __bn=$(basename $file .$__fsuffix)
            if [[ "$file" =~ .*dc2c.hex.* ]]; then
                js_key=".dc.dc2c.$__bn"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository="$(md5_of $CUSTOMER_ID_BASE_DIR/$file)"
            elif [[ "$file" =~ .*cash[.]json.* ]]; then
                js_key=".conf.$__cl.zg[1].z[1].etc.psa_config.$__bn"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository="$(md5_of $CUSTOMER_ID_BASE_DIR/$file)"
            elif [[ "$file" =~ .*print[0-9][0-9][.]json.* ]]; then
                js_key=".conf.$__cl.zg[1].z[1].etc.psa_config.$__bn"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository="$(md5_of $CUSTOMER_ID_BASE_DIR/$file)"
            elif [[ "$file" =~ .*conf[.]json.* ]]; then
                js_key=".conf.$__cl.zg[1].z[1].etc.psa_config.DC2C_conf"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository="$(md5_of $CUSTOMER_ID_BASE_DIR/$file)"
            elif [[ "$file" =~ .*serial[.]json.* ]]; then
                js_key=".conf.$__cl.zg[1].z[1].etc.psa_config.DC2C_serial"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository="$(md5_of $CUSTOMER_ID_BASE_DIR/$file)"
            elif [[ "$file" =~ .*ATBQT[.]ini.* ]]; then
                js_key=".ini.$__cl.zg[1].z[1].opt.app.ATBAPP.ATBQT"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository="$(md5_of $ATBQT_INI_FULL)"
            elif [[ "$file" =~ .*sysconfig[.]ini.* ]]; then
                js_key=".ini.$__cl.zg[1].z[1].opt.app.sysconfig.sysconfig"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository=$(md5_of $SYSCONFIG_SYSCONFIG_INI_FULL)
            elif [[ "$file" =~ .*SystemControl[.]ini.* ]]; then
                js_key=".ini.$__cl.zg[1].z[1].opt.app.sysconfig.SystemControl"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository=$(md5_of $SYSCONFIG_SYSCTRL_INI_FULL)
            elif [[ "$file" =~ .*ISMASMgr/ISMASMgr[.]ini.* ]]; then
                js_key=".ini.$__cl.zg[1].z[1].opt.app.ISMASMgr.ISMASMgr"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository=$(md5_of $ISMASMGR_ISMASMGR_INI_FULL)
            elif [[ "$file" =~ .*sysconfig/ISMASMgr[.]ini.* ]]; then
                js_key=".ini.$__cl.zg[1].z[1].opt.app.sysconfig.ISMASMgr"
                md5sum_update_conf=$(cat $UPDATE_CONF | jq -r $js_key)
                md5sum_repository=$(md5_of $SYSCONFIG_ISMASMGR_INI_FULL)
            else
                continue
            fi
                
            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 () {
    nc localhost 7778
}

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