#!/bin/bash

GIT_ABS=`git rev-parse --show-toplevel`
GIT_BRANCH=`git rev-parse --abbrev-ref HEAD | sed 's|.*/||'`
HEADURLBASE="http://git.evergreen-ils.org/Evergreen.git?h=refs/heads/"
HEADURL="$HEADURLBASE$GIT_BRANCH"

# Drop to the root of the checkout
cd $GIT_ABS

VERSION=AUTO # -v (version)
PREV_BRANCH=AUTO # -f (from)
PREV_VERSION=AUTO # -F (from version)
NO_UPGRADE=AUTO # -n
IS_PREVIEW=AUTO # -p
TAG_ONLY=NO # -t
BUILD_ONLY=NO # -b

while getopts ":hv:f:F:nptb" opt; do
    case $opt in
        v)
            VERSION=$OPTARG
        ;;
        f)
            PREV_BRANCH=$OPTARG
        ;;
        F)
            PREV_VERSION=$OPTARG
        ;;
        n)
            NO_UPGRADE=YES
        ;;
        p)
            IS_PREVIEW=YES
        ;;
        t)
            TAG_ONLY=YES
        ;;
        b)
            BUILD_ONLY=YES
        ;;
        \?)
            echo "Invalid Option: -$OPTARG"
            exit 1
        ;;
        :)
            echo "-$OPTARG requires an argument."
            exit 1
        ;;
        h)
            echo "$0 [-v VERSION] [-f PREV_BRANCH | -t | -b] [-F PREV_VERSION] [-n] [-p]"
            echo "   VERSION is auto-detected by default and is based on the currently checked out branch."
            echo "   PREV_BRANCH is auto-detected by default but that isn't reliable. Include remote name!"
            echo "   PREV_VERSION Is auto-detected by default and is based on the PREV_BRANCH's name."
            echo "   -n specifies that you don't want an upgrade script to be auto-generated."
            echo "   -p specifies that this is a preview build."
            echo "   -t turns on tag only mode."
            echo "   -b turns on build only mode."
            echo "   NOTE: -t and -b override PREV_BRANCH/PREV_VERSION, but -b overrides -t."
            exit -1
        ;;
    esac
done

if [ $TAG_ONLY = "YES" ]; then
    PREV_BRANCH="TAG"
fi

if [ $BUILD_ONLY = "YES" ]; then
    PREV_BRANCH="PACKAGE"
fi

if [ $VERSION = "AUTO" ]; then
    # Auto-pick version based on branch name
    echo AUTO VERSION
    VERSION=`echo $GIT_BRANCH | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)_\([0-9]\+\)_\(.\+\)$/\1.\2.\3-\4/'`
    VERSION=`echo $VERSION | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)_\([0-9]\+\)$/\1.\2.\3/'`
    VERSION=`echo $VERSION | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)_\(.\+\)$/\1.\2-\3/'`
    VERSION=`echo $VERSION | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)$/\1.\2/'`
    if [ "$VERSION" = "$GIT_BRANCH" ]; then
        echo "AUTO VERSION FAILED."
        exit 1
    fi
fi
SHORT_VERSION=`echo $VERSION | grep -o '^[0-9]\+\.[0-9]\+'`
echo "Version: $VERSION Short: $SHORT_VERSION"

# prep a couple alternate represenations
DASH_VERSION=`echo $VERSION | sed 's/\./-/g'`
SHORT_DASH_VERSION=`echo $SHORT_VERSION | sed 's/\./-/g'`
UNDER_VERSION=`echo $VERSION | sed -e 's/\./_/g;s/-/_/g'`

PREVIEW_TEXT=""

if [ "$IS_PREVIEW" == "YES" ]; then
    PREVIEW_TEXT="previews/"
fi

# Release Preamble
# For adding into README for release builds
# The head is used to check if we have it already (no need to add it twice)
RELEASE_PREAMBLE_HEAD="Preamble: Getting an Evergreen official release tarball"
RELEASE_PREAMBLE=$( cat <<PREAMBLE
$RELEASE_PREAMBLE_HEAD
-------------------------------------------------------

To download and extract the source for the current release of Evergreen, issue
the following commands as the *user* Linux account:

[source, bash]
------------------------------------------------------------------------------
wget -c http://evergreen-ils.org/downloads/${PREVIEW_TEXT}Evergreen-ILS-$VERSION.tar.gz
tar xzf Evergreen-ILS-$VERSION.tar.gz
------------------------------------------------------------------------------

PREAMBLE
)

# This defines what the preamble comes before
RELEASE_PREAMBLE_BEFORE="Preamble: Developer instructions"

if [ $PREV_BRANCH != "TAG" -a $PREV_BRANCH != "PACKAGE" ]; then
    if [ $PREV_BRANCH = "AUTO" ]; then
        echo "AUTO PREVIOUS BRANCH"
        PREV_BRANCH=`echo ${UNDER_VERSION%_*}`
        PREV_BRANCH=`git branch -r | grep "rel_${PREV_BRANCH}_[^_]\+$" | sort -rV | head -n1`
        PREV_BRANCH=`echo $PREV_BRANCH`
        read -p "Does branch $PREV_BRANCH look like the previous version (y/n)?"
        if [ "$REPLY" != "y" -a "$REPLY" != 'Y' ]; then
            echo "Please specify the previous branch as second parameter. To continue auto-version, use AUTO as first parameter."
            exit 1
        fi
    fi
    git show $PREV_BRANCH &>/dev/null
    if [ $? -ne 0 -o -z "$PREV_BRANCH" ]; then
        echo "PREVIOUS VERSION COMMIT NOT FOUND";
        exit 1
    fi
    if [ $PREV_VERSION = "AUTO" ]; then
        echo "AUTO PREVIOUS VERSION"
        PREV_BRANCH_END=`echo $PREV_BRANCH | sed 's|.*/||'`
        PREV_VERSION=`echo $PREV_BRANCH_END | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)_\([0-9]\+\)_\(.\+\)$/\1.\2.\3-\4/'`
        PREV_VERSION=`echo $PREV_VERSION | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)_\([0-9]\+\)$/\1.\2.\3/'`
        PREV_VERSION=`echo $PREV_VERSION | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)_\(.\+\)$/\1.\2-\3/'`
        PREV_VERSION=`echo $PREV_VERSION | sed 's/^rel_\([0-9]\+\)_\([0-9]\+\)$/\1.\2/'`
        if [ "$PREV_VERSION" = "$PREV_BRANCH_END" ]; then
            echo "AUTO PREVIOUS VERSION FAILED."
            exit 1
        fi
    fi
    echo "Previous Version: $PREV_VERSION"
else
    echo "Tagging or packaging, no need for previous version"
fi

if [ $PREV_BRANCH != "PACKAGE" ]; then

    echo "Applying to Application.pm - HEAD -> $DASH_VERSION"
    echo "Alt: $SHORT_DASH_VERSION -> $DASH_VERSION"
    sed -i -e "s/\"$SHORT_DASH_VERSION[^\"]*\"/\"$DASH_VERSION\"/" -e "s/\"HEAD\"/\"$DASH_VERSION\"/" $GIT_ABS/Open-ILS/src/perlmods/lib/OpenILS/Application.pm

    if [ -f "$GIT_ABS/Open-ILS/xul/staff_client/windowssetup.nsi" ]; then
        echo "Applying to windowssetup.nsi - Master -> $SHORT_VERSION"
        sed -i "s/Master/$SHORT_VERSION/" $GIT_ABS/Open-ILS/xul/staff_client/windowssetup.nsi
    fi

    echo "Applying to README:"
    echo "STAMP_ID with $UNDER_VERSION"
    sed -i -e "s/STAMP_ID=rel_[^ ]*/STAMP_ID=rel_$UNDER_VERSION/" $GIT_ABS/README

    if [ $PREV_BRANCH != "TAG" ]; then
        if [ "$(grep "$RELEASE_PREAMBLE_HEAD" $GIT_ABS/README )" ]; then
            echo "Updating old download links"
            sed -i -e "s|\(previews/\)\?Evergreen-ILS-.*\.tar\.gz|${PREVIEW_TEXT}Evergreen-ILS-$VERSION.tar.gz|" $GIT_ABS/README
            sed -i -e "s| Evergreen-ILS-.*\.tar\.gz| Evergreen-ILS-$VERSION.tar.gz|" $GIT_ABS/README
        else
            echo "Adding Download Preamble"
            perl -pi -e "s|^|$RELEASE_PREAMBLE\n\n| if /$RELEASE_PREAMBLE_BEFORE/" $GIT_ABS/README
        fi
    fi

    echo "Applying to configure.ac:"
    echo "AC_INIT and AM_INIT_AUTOMAKE entries"
    sed -i -e "s/^\(AC_INIT(Open-ILS, \)[^,]*,/\1$VERSION,/" -e "s/^\(AM_INIT_AUTOMAKE(\[[^]]*], \[\)[^]]*]/\1$VERSION]/" configure.ac

    echo "Finding/updating old \$HeadURL\$ entries"
    HEADURLBASE=`echo ${HEADURLBASE} | sed 's/\?/\\?/'`
    for file in `grep -Rl --exclude=make_release "$HEADURLBASE" $GIT_ABS`
    do
        echo $file
        sed -i "s|${HEADURLBASE}[A-Za-z0-9_]*|$HEADURL|" $file
    done

    echo "Applying \$HeadURL\$ - $HEADURL"
    for file in `grep -Rl --exclude=make_release '\\$HeadURL\\$' $GIT_ABS`
    do
        echo $file
        sed -i "s|\\\$HeadURL\\\$|$HEADURL|" $file
    done

    if [ "$PREV_BRANCH" = "TAG" ]; then
        echo "Committing (but not pushing) the lot of it"
        git commit -asm "Tagging version"
        exit 0;
    fi

    echo "Applying version to 002.schema.config.sql:"
    echo "config.upgrade_log entry for $VERSION"
    sed -i -e "s/\(INSERT INTO config.upgrade_log (version[^)]*) VALUES ('\)[0-9]*\('.*;\).*/&\n\1$VERSION\2/" $GIT_ABS/Open-ILS/src/sql/Pg/002.schema.config.sql;

    if [ "$NO_UPGRADE" = "AUTO" ]; then
        echo "Checking for DB upgrade potential...."
        git ls-tree --name-only $PREV_BRANCH -- Open-ILS/src/sql/Pg/upgrade/ | cut -d/ -f6 | cut -d. -f1 | sort > old_upgrades.txt
        git ls-tree --name-only HEAD -- Open-ILS/src/sql/Pg/upgrade/ | cut -d/ -f6 | cut -d. -f1 | sort > new_upgrades.txt
        UPGRADE_CHECK=`diff old_upgrades.txt new_upgrades.txt | grep '^>' | cut -d' ' -f2`
        UPGRADE_FILE=Open-ILS/src/sql/Pg/version-upgrade/$PREV_VERSION-$VERSION-upgrade-db.sql
        if [ -f "$UPGRADE_FILE" ]; then
            echo "Upgrade script for $PREV_VERSION-$VERSION already exists. Skipping."
            UPGRADE_FILE=""
        elif [ -n "$UPGRADE_CHECK" ]; then
            echo "Found Upgrade Files! Building Upgrade Script."
            echo "--Upgrade Script for $PREV_VERSION to $VERSION" > $UPGRADE_FILE
            echo "BEGIN;" >> $UPGRADE_FILE
            grep "config.upgrade_log.*$VERSION" Open-ILS/src/sql/Pg/002.schema.config.sql >> $UPGRADE_FILE
            for NUM in $UPGRADE_CHECK; do
                cat Open-ILS/src/sql/Pg/upgrade/$NUM.* 2>/dev/null | grep -v '^\s*\(BEGIN\|COMMIT\);\s*$' >> $UPGRADE_FILE
            done;
            echo "COMMIT;" >> $UPGRADE_FILE
            MAYBE_DUPES=`grep -oP 'CREATE (OR REPLACE )?FUNCTION +\K[^ ]*(?= *\()' $UPGRADE_FILE | sort | grep -P '^(.*)\n\1$' | sort -u`
            if [ -n "$MAYBE_DUPES" ]; then
                echo ""
                echo "The following functions may be needlessly duplicated in the upgrade script:"
                echo "$MAYBE_DUPES"
                echo ""
                echo "For reference, I am writing the list to maybe_dupes.txt"
                echo "$MAYBE_DUPES" > maybe_dupes.txt
            fi
            echo ""
            read -p "Please manually check the upgrade file."
            ${EDITOR:-vi} $UPGRADE_FILE
            git add $UPGRADE_FILE
        fi
    fi

    grep -i -m 1 Signed-off-by ChangeLog &> /dev/null
    if [ $? -ne 0 ]; then
        echo "Building ChangeLog"
        git log --cherry-pick --right-only --no-merges --pretty --summary --numstat $PREV_BRANCH..HEAD > $GIT_ABS/ChangeLog
    else
        echo "Not overwriting existing ChangeLog!"
    fi

    echo "Committing (but not pushing) the lot of it"
    COMMIT_MESSAGE="Bumping version numbers and adding Changelog"
    if [ -n "$UPGRADE_FILE" ]; then
        COMMIT_MESSAGE="Bumping version numbers, adding Upgrade Script and Changelog"
    fi
    git commit -asm "$COMMIT_MESSAGE"
fi

echo "Building release dump"
cd $GIT_ABS
mkdir -p ../release
git archive --prefix=Evergreen-ILS-$VERSION/ HEAD | (cd ../release && tar xf -)
cd ../release/Evergreen-ILS-$VERSION
if [ -f ./autogen.sh ]; then
    echo "Running autogen"
    ./autogen.sh
else
    echo "Running autoreconf"
    autoreconf -i
fi
cd build/i18n
echo "Building i18n"
make install_all_locales
echo "i18n Cleanup"
cd ..
rm -rf i18n
echo "Installing Dojo"
cd ..
if [ ! -f "../dojo.tgz" ]; then
    wget http://evergreen-ils.org/downloads/dojo.tgz -O ../dojo.tgz
fi
tar xzf ../dojo.tgz -C Open-ILS/web/js/dojo/
echo "Grabbing XULRunner (to avoid issues with version changes)"
cd Open-ILS/xul/staff_client
XULRUNNER_VERSION=`grep '^XULRUNNER_VERSION' Makefile.am`
XULRUNNER_VERSION=${XULRUNNER_VERSION##XULRUNNER_VERSION=}
wget http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/$XULRUNNER_VERSION/runtimes/xulrunner-$XULRUNNER_VERSION.en-US.win32.zip
wget http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/$XULRUNNER_VERSION/runtimes/xulrunner-$XULRUNNER_VERSION.en-US.linux-i686.tar.bz2
wget http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/$XULRUNNER_VERSION/runtimes/xulrunner-$XULRUNNER_VERSION.en-US.linux-x86_64.tar.bz2

echo "Prepping server download files"
cd ../../../../
tar czf Evergreen-ILS-$VERSION.tar.gz Evergreen-ILS-$VERSION/
md5sum Evergreen-ILS-$VERSION.tar.gz > Evergreen-ILS-$VERSION.tar.gz.md5
if [ $PREV_BRANCH != "PACKAGE" ]; then # We need to have tagged to do this ;)
    cp Evergreen-ILS-$VERSION/ChangeLog ChangeLog-$PREV_VERSION-$VERSION
fi

echo "Running enough of configure to build staff client"
cd Evergreen-ILS-$VERSION/
./configure --disable-core --disable-web --disable-updates --disable-apache-modules --disable-reporter

echo "Building Release Staff Clients"
cd Open-ILS/xul/staff_client
make rigrelease
make STAFF_CLIENT_STAMP_ID=rel_$UNDER_VERSION build
make win-client
mv evergreen_staff_client_setup.exe ../../../../evergreen-setup-$VERSION.exe
make linux32-client
mv evergreen_staff_client_i686.tar.bz2 ../../../../evergreen-client-${VERSION}_i686.tar.bz2
make linux64-client
mv evergreen_staff_client_x86_64.tar.bz2 ../../../../evergreen-client-${VERSION}_x86_64.tar.bz2
cd ../../../../
md5sum evergreen-setup-$VERSION.exe > evergreen-setup-$VERSION.exe.md5
md5sum evergreen-client-${VERSION}_i686.tar.bz2 > evergreen-client-${VERSION}_i686.tar.bz2.md5
md5sum evergreen-client-${VERSION}_x86_64.tar.bz2 > evergreen-client-${VERSION}_x86_64.tar.bz2.md5


echo "Removing build directory"
rm -rf Evergreen-ILS-$VERSION/

echo ""
echo "FOR YOU TODO:"
echo "* TEST the release"
if [ $PREV_BRANCH != "PACKAGE" ]; then
    echo "* Push release branch"
fi
echo "* Upload files"
echo "* Send emails"