#!/bin/sh

[ -f /usr/lib/colors.sh ] && . /usr/lib/colors.sh
[ -f /usr/lib/glyphs.sh ] && . /usr/lib/glyphs.sh

XIPKG_INSTALL=/usr/lib/xipkg/install.sh
[ -f $XIPKG_INSTALL ] && . $XIPKG_INSTALL

xib_dir="/var/lib/xib"
priv_key="xi.pem"

#buildfiles="$xib_dir/buildfiles"
buildfiles="/home/david/docs/proj/xilinux/buildfiles"
seen="$xib_dir/seen"
logs="$xib_dir/logs"
chroot="$xib_dir/chroot"
stage="$xib_dir/stage"
logs="$xib_dir/logs"
local_repo="$xib_dir/repo"
keychain="$xib_dir/keychain"

quickfail=true

# add a package to the repo's packages.list
#
publish_package () {
    local repo=$1 
    xipkgs=$(ls $stage/*.xipkg)

    packageslist="$local_repo/$repo/packages.list"
    depsgraph="$local_repo/deps.graph"
    [ ! -d "$local_repo/$repo" ] && mkdir -p "$local_repo/$repo"
    [ ! -f "$packageslist" ] && touch $packageslist
    [ ! -f "$depsgraph" ] && touch $depsgraph

    for xipkg in $xipkgs; do
        local name=$(basename $xipkg ".xipkg")
        local filecount=$(tar -tvvf $xipkg | grep -cv ^d)
        local checksum=$(sha512sum $xipkg | awk '{ print $1 }')
        local size=$(stat -t $xipkg | cut -d" " -f2)
        local deps=$(grep "^DEPS=" $xipkg.info | sed -rn 's/DEPS=(.*)/\1/p')

        sed -i "s/^$name.xipkg//" $packageslist
        echo $name.xipkg $checksum $size $filecount  >> $packageslist

        sed -i "s/^$name: //" $depsgraph
        echo "$name: $deps" >> $depsgraph

        [ -f $stage/$name.xipkg ] && mv $stage/$name.xipkg $local_repo/$repo/$name.xipkg
        [ -f $stage/$name.xipkg.info ] && mv $stage/$name.xipkg.info $local_repo/$repo/$name.xipkg.info
        [ -f $stage/$name.xibuild ] && mv $stage/$name.xibuild $local_repo/$repo/$name.xibuild
        [ -f $logs/$name.log ] && cp $logs/$name.log $local_repo/$repo/$name.log
    done

    [ ! -d "$seen" ] && mkdir -p $seen
    for s in $stage/*.xibsum; do
        s=$(basename $s)
        mv $stage/$s $seen/$s
    done
}

# get root package from package name
#
get_package_build () {
    local buildfile=$(find $buildfiles/repo -name "$1.xibuild" | head -1)
    echo ${buildfile%/*}
}

list_all () {
    for repo in $(ls -1 $buildfiles/repo); do
        for name in $(ls -1 $buildfiles/repo/$repo); do
            echo "$repo/$name"
        done
    done
}

# get package file from package name
#
get_package_file () {
    find $local_repo/ -name "$1.xipkg" | head -1
}

# Use xibuild to build a singular package, input is packagebuild dir
#
build_package () {
    local name=$(basename $1)

    rm -rf $stage
    mkdir -p $stage

    [ ! -d "$logs" ] && mkdir -p $logs
    rm -f $logs/$name.log
    touch $logs/$name.log

    xibuild -v -l $logs/$name.log -k $keychain/$priv_key -C $1 -d $stage -r $chroot || return 1
    get_buildfiles_hash $1 > $stage/$name.xibsum
}

package_install () {
    local name=$1
    local xipkg=$2
    [ -f $xipkg ] &&
        xipkg -qlny -r $3 install $xipkg && printf "${PASS}${CHECKMARK}\n" || printf "${NEUTRAL}${CHECKMARK}\n"
}

# get the direct dependencies of a single package
#
get_deps () {
    local package=$(get_package_build $1)
    [ -d $package ] && 
             sed -rn "s/^.*DEPS=\"(.*)\"/\1/p" $package/$1.xibuild
}

list_deps () {
    local deps=""
    while [ "$#" != "0" ]; do
        # pop a value from the args
        local package=$1

        #only add if not already added
        echo ${deps} | grep -q "\b$package\b" || deps="$deps $package"

        for dep in $(get_deps $package); do
            # if not already checked
            echo $@ | grep -qv "\b$dep\b" && set -- $@ $dep
        done
        shift
    done
    echo "$deps" 
}

get_buildfiles_hash () {
    cat $1/*.xibuild | sha512sum | cut -d' ' -f1
}

xib_single () {
    local name=$1
    local deps=$(get_deps $name)
    missing=""
    for dep in $deps; do
        [ -e "$chroot/var/lib/xipkg/installed/$dep" ] || {
            pkgfile=$(get_package_file $dep)
                    [ "${#pkgfile}" = "0" ] && missing="$missing $dep"
            printf "${LIGHT_GREEN}+${LIGHT_CYAN}install $dep"
            package_install $dep $(get_package_file $dep) $chroot
        }
    done

    [ "${#missing}" != "0" ] && {
        printf "${RED}$name depends on these packages to be build before: ${LIGHT_RED}$missing\n"
        return 1
    }

    package=$(get_package_build $name)
    repo=$(echo "$package" | rev | cut -f2 -d'/' | rev)
    build_package $package &&
    publish_package $repo 
}

xib_all () {
    for name in $(build_order); do

        package=$(get_package_build $name)
        [ "${#package}" != 0 ] && [ -d "$package" ] && {
            local package_name="$(basename ${package#/*})"
            xibsum=$(get_buildfiles_hash $package)
            [ -f "$seen/$package_name.xibsum" ] && [ "$(cat "$seen/$package_name.xibsum")" = "$xibsum" ]  && {
                printf "${BLUE}$package_name${LIGHT_BLUE}...already built!\n"
            } || {
                xib_single $name || {
                    $quickfail && return 0
                }
            }
            true

        } || {
            printf "${RED} could not find package for $name in $package $RESET\n"
        }
    done
}

reverse_lines () {
    local result=
    while IFS= read -r line; do 
        result="$line
        $result"
    done
    echo "$result" 
}

build_order () {
    for pkg in $(list_all); do 
        set -- $(echo $pkg | tr '/' ' ')
        repo=$1
        name=$2
        [ "$repo" != "meta" ] &&
        for dep in $(get_deps $name); do
            echo $name $dep
        done
    done | tsort | reverse_lines
}

xibd () {
    quickfail=false
    while true; do
        cd $buildfiles
        git pull
        cd $xib_dir
        xib_all
        sleep 5
    done
}

[ "$#" = 0 ] && {
    xib_all
} || {
    [ "$1" = "-d" ] &&  
    xibd || for x in $@; do
        xib_single $x
    done
}