#!/usr/bin/env bash

branch_name="$1"
shift

is_5_7_or_above="false"
is_5_8_or_above="false"
if [ "${branch_name#master}" != "${branch_name}" ]; then
  is_5_8_or_above="true"
  is_5_7_or_above="true"
elif [ "${branch_name#V5-7-}" != "${branch_name}" ]; then
  is_5_7_or_above="true"
fi
case "${OSTYPE}" in
    linux*)
        opensslver="$(
                for p in openssl-devel libopenssl-devel libressl-devel; do
	            rpm -q --qf '%{version}\n' $p 2>/dev/null;
                done;
	        dpkg-query --show -f '${Version}\n' libssl-dev 2>/dev/null;
	        pacman -Q openssl 2>&1 | sed -n 's/^openssl[[:blank:]]*//p'
            )";;
    *)
	opensslver=1.0;;
esac
opensshver="$({
    rpm -q openssh-devel;
    rpm -q libssh2-devel;
    rpm -q libssh-devel; } 2>/dev/null |
    sed -n 's/^.*ssh[0-9]*-devel-\([0-9a-z.]*\)-.*$/\1/p' | head -n1)"

options=()
options+=(--enable-developer)
options+=(--enable-ipv6)
options+=("--prefix=/usr/local/net-snmp-${branch_name}")
options+=("--with-cflags=$cflags")
options+=(--with-defaults)
transports=()
[ "$opensshver" != "" ] && transports+=(SSH)
# Mib names can be found as follows:
# (cd agent/mibgroup &&
# git grep -lE 'void[[:blank:]]*init_.*\(void\)|config_require\(' |
#  sed -n 's/\.h$//p')
mibs=()
mibs+=(mibII)
case "$MODE" in
    read-only)
        ;;
    *)
        mibs+=(examples/data_set)
        mibs+=(examples/delayed_instance)
        mibs+=(examples/example)
        mibs+=(examples/notification)
        mibs+=(examples/scalar_int)
        mibs+=(examples/ucdDemoPublic)
        mibs+=(examples/watched)
        mibs+=(smux)
        ;;
esac

case "$(uname)" in
  Linux*)
      options+=(--enable-new-features)
      case "$MODE" in
          mini*|read-only)
              ;;
          *)
              $is_5_7_or_above && mibs+=(deliver/deliverByNotify)
              mibs+=(disman/event)
              #mibs+=(disman/expression) - to do: figure out why this fails on Travis
              mibs+=(disman/mteEventNotificationTable)
              mibs+=(disman/mteEventTable)
              mibs+=(disman/mteObjectsTable)
              mibs+=(disman/mteTriggerBooleanTable)
              mibs+=(disman/mteTriggerDeltaTable)
              mibs+=(disman/mteTriggerExistenceTable)
              mibs+=(disman/mteTriggerTable)
              mibs+=(disman/mteTriggerThresholdTable)
              mibs+=(disman/nslookup-mib)
              mibs+=(disman/ping-mib)
              mibs+=(disman/schedule)
              mibs+=(disman/traceroute-mib)
              mibs+=(etherlike-mib)
              mibs+=(examples/netSnmpHostsTable)
              mibs+=(hardware/cpu)
              mibs+=(hardware/fsys)
              mibs+=(hardware/memory)
              mibs+=(hardware/sensors)
              mibs+=(host)
              mibs+=(ip-forward-mib)
              mibs+=(ip-mib/inetNetToMediaTable)
              mibs+=(ip-mib/ipDefaultRouterTable)
              mibs+=(ip-mib/ipv4InterfaceTable)
              mibs+=(ip-mib/ipv6InterfaceTable)
              mibs+=(ip-mib/ipv6ScopeZoneIndexTable)
              mibs+=(mibII/ipAddr)
              mibs+=(mibII/mta_sendmail)
              mibs+=(misc/ipfwacc)
              mibs+=(sctp-mib)
              mibs+=(snmp-notification-mib)
              [ "$opensslver" != "" ] && mibs+=(snmp-usm-dh-objects-mib)
              mibs+=(tcp-mib)
              mibs+=(testhandler)
              [ "$opensslver" != "" ] && mibs+=(tlstm-mib tsm-mib)
              mibs+=(tunnel)
              mibs+=(ucd-snmp/diskio)
              mibs+=(ucd-snmp/lmsensorsMib)
              mibs+=(ucd-snmp/extensible)
              mibs+=(udp-mib)
	      mibs+=(rmon-mib)
              ;;
      esac
      options+=(--with-mysql)
      options+=(--with-perl-modules)
      transports+=(AAL5PVC)
      transports+=(IPX)
      transports+=(STD)
      $is_5_8_or_above && transports+=(UDPshared)
      [ "$opensslver" = "" ] && options+=("--with-openssl=internal")
      options+=("--with-default-snmp-version=2")
      { rpm -q python-setuptools >/dev/null 2>&1 || rpm -q python-devel >/dev/null 2>&1 || dpkg-query -l python-setuptools >/dev/null 2>&1; } && options+=(--with-python-modules)
      # Disabled modules because troublesome: Rmon ipfwchains/ipfwchains ucd-snmp/lmSensors
    ;;
  darwin*|Darwin*)
      case "$MODE" in
          mini*|read-only)
              ;;
          *)
              mibs+=(disman/nslookup-mib)
              mibs+=(host)
              mibs+=(if-mib)
              mibs+=(mibII/mta_sendmail)
              mibs+=(misc/ipfwacc)
              mibs+=(snmp-notification-mib)
              mibs+=(snmp-usm-dh-objects-mib)
              mibs+=(tcp-mib)
              mibs+=(ucd-snmp/diskio)
              mibs+=(ucd-snmp/extensible)
              mibs+=(udp-mib)
              mibs+=(Rmon)
              ;;
      esac
      options+=(--with-python-modules)
      if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
          options+=("--with-openssl=$(brew --prefix openssl)")
          # On Travis OS/X linking the Perl modules fails with "undefined symbol
          # _BN_bin2bn" etc.
          options+=(--disable-embedded-perl --without-perl-modules)
      fi
    ;;
  CYGWIN*)
      export ENV_SEPARATOR=":"
      mibs+=(ucd-snmp/extensible)
      mibs+=(winExtDLL)
      # To do: avoid that the Net-SNMP headers trigger the following build
      # failure: /usr/include/w32api/psdk_inc/_fd_types.h:100:2: warning: #warning "fd_set and associated macros have been defined in sys/types. This can cause runtime problems with W32 sockets" [-Wcpp]
      # #warning "fd_set and associated macros have been defined in sys/types.
      options+=("--with-openssl=internal")
      if [ -n "$APPVEYOR" ]; then
          # On Appveyor building the Perl modules fails as follows:
          # /usr/lib/perl5/5.26/i686-cygwin-threads-64int/CORE/reentr.h:104:26: fatal error: crypt.h: No such file or directory
          options+=(--disable-embedded-perl --without-perl-modules)
      fi
    ;;
  MINGW*|MSYS*)
      options+=(--disable-embedded-perl)
      if [ "$branch_name" != "V5-4-patches" ]; then
	  options+=("--with-openssl=/c/OpenSSL")
      fi
      mibs+=(snmp-notification-mib)
      mibs+=(ucd-snmp/dlmod)
      mibs+=(ucd-snmp/extensible)
      mibs+=(winExtDLL)
      options+=(--without-perl-modules)
      #options+=(--with-mibdirs="C:/usr/share/snmp/mibs")
      if [ -n "$APPVEYOR" ]; then
          options+=("--build=x86_64-pc-mingw32")
      fi
    ;;
  *)
    echo "Unknown OS $(uname)."
    ;;
esac

with_openssl=""
for o in "${options[@]}"; do
    if [ "${o#--with-openssl=}" != "$o" ]; then
        with_openssl="${o#--with-openssl=}"
    fi
done
set -x
if [ "$opensslver" != "" ] &&
	grep -rqw BIO_dgram_get_peer "${with_openssl:-/usr}/include/openssl" 2>/dev/null
then
	transports+=(DTLSUDP)
        # to do: figure out why one of the IPv6 TLSTCP test fails on Travis.
        if [ "${TRAVIS_OS_NAME}" != linux ]; then
	    transports+=(TLSTCP)
        fi
fi
set +x
if $is_5_8_or_above; then
    [ -e "${with_openssl:-/usr}/openssl/aes.h" ] &&
        [ -e "${with_openssl:-/usr}/openssl/evp.h" ] &&
        options+=(--enable-blumenthal-aes)
fi
security_modules=(usm tsm)
if [ -e /usr/include/krb5.h ]; then
    security_modules+=(ksm)
fi

case "$MODE" in
    disable-set)
        options+=(--disable-set-support);;
    mini)
        options+=(--enable-mini-agent);;
    minimalist)
        options+=(--enable-minimalist);;
    read-only)
        options+=(--enable-read-only);;
    regular|"")
        ;;
    *)
        echo "Error: unknown build type $MODE"
        exit 1;;
esac

set -x
./configure "${options[@]}" --with-transports="${transports[*]}"	\
            --with-security-modules="${security_modules[*]}"		\
	    --with-mib-modules="${mibs[*]}" "$@"
set +x