#!/bin/bash -e

IMAGE_NAME=$1

if [ -z "$IMAGE_NAME" ]; then
    echo "PAS DE NOM DE MODULE"
    exit 1
fi

# root dir configuration
RISOTTO_DIR="/var/lib/risotto"
RISOTTO_IMAGE_DIR="$RISOTTO_DIR/images"
# image configuration
IMAGE_BASE_RISOTTO_BASE_DIR="$RISOTTO_IMAGE_DIR/image_bases"
IMAGE_NAME_RISOTTO_IMAGE_DIR="$RISOTTO_IMAGE_DIR/$IMAGE_NAME"
IMAGE_NAME_RISOTTO_IMAGE_NAME="$RISOTTO_IMAGE_DIR/$IMAGE_NAME".tar
IMAGE_DIR_RECIPIENT_IMAGE="/var/lib/risotto/images_files/$IMAGE_NAME"


#FIXME ou ?

rm -rf "$IMAGE_NAME_RISOTTO_IMAGE_DIR" "$RISOTTO_IMAGE_DIR/tmp"
mkdir -p "$RISOTTO_IMAGE_DIR"
PKG=""
BASE_DIR=""
for script in $(ls "$IMAGE_DIR_RECIPIENT_IMAGE"/preinstall/*.sh 2> /dev/null); do
    . "$script"
done

if [ -z "$OS_NAME" ]; then
    echo "NO OS NAME DEFINED"
    exit 0
fi
if [ -z "$RELEASEVER" ]; then
    echo "NO RELEASEVER DEFINED"
    exit 0
fi
if [ -z "$INSTALL_TOOL" ]; then
    echo "NO INSTALL TOOL DEFINED"
    exit 0
fi
BASE_NAME="$OS_NAME-$RELEASEVER"
BASE_DIR="$IMAGE_BASE_RISOTTO_BASE_DIR/$BASE_NAME"
BASE_TAR="$IMAGE_BASE_RISOTTO_BASE_DIR-$BASE_NAME".tar
BASE_PKGS_FILE="$IMAGE_BASE_RISOTTO_BASE_DIR-$BASE_NAME.pkgs"
BASE_LOCK="$IMAGE_BASE_RISOTTO_BASE_DIR-$BASE_NAME.build"


function dnf_opt_base() {
    INSTALL_DIR=$1
    echo "--setopt=install_weak_deps=False --nodocs --noplugins --installroot=$INSTALL_DIR --releasever $RELEASEVER"
}

function dnf_opt() {
    INSTALL_DIR=$1
    INSTALL_PKG=$2
	OPT=$(dnf_opt_base "$INSTALL_DIR")
    echo "$OPT install $INSTALL_PKG"
}
function new_package_base() {
    if [ "$INSTALL_TOOL" = "dnf" ]; then
        OPT=$(dnf_opt "$BASE_DIR" "$BASE_PKG")
        dnf --assumeno $OPT | grep ^" " > "$BASE_PKGS_FILE".new
    else
        debootstrap --include="$BASE_PKG" --variant=minbase "$RELEASEVER" "$BASE_DIR" > /dev/null
        chroot "$BASE_DIR" dpkg-query -f '${binary:Package} ${source:Version}\n' -W > "$BASE_PKGS_FILE".new
    fi
}
function install_base() {
    if [ "$INSTALL_TOOL" = "dnf" ]; then
        OPT=$(dnf_opt "$BASE_DIR" "$BASE_PKG")
        dnf --assumeyes $OPT
    fi
}
function new_package() {
    if [ "$INSTALL_TOOL" = "dnf" ]; then
        OPT=$(dnf_opt_base "$IMAGE_NAME_RISOTTO_IMAGE_DIR")
		dnf $OPT update
        OPT=$(dnf_opt "$IMAGE_NAME_RISOTTO_IMAGE_DIR" "$PKG")
        dnf --assumeno $OPT | grep ^" " > "$IMAGE_NAME_RISOTTO_IMAGE_DIR".pkgs.new
    else
        chroot "$IMAGE_NAME_RISOTTO_IMAGE_DIR" apt update > /dev/null 2>&1
        chroot "$IMAGE_NAME_RISOTTO_IMAGE_DIR" apt install --no-install-recommends --yes $PKG -s 2>/dev/null|grep ^"Inst " > "$IMAGE_NAME_RISOTTO_IMAGE_DIR".pkgs.new
    fi
}
function install_pkg() {
    if [ "$INSTALL_TOOL" = "dnf" ]; then
        OPT=$(dnf_opt "$IMAGE_NAME_RISOTTO_IMAGE_DIR" "$PKG")
        dnf --assumeyes $OPT
    else
        chroot "$IMAGE_NAME_RISOTTO_IMAGE_DIR" apt install --no-install-recommends --yes $PKG
    fi
}


if [ ! -f "$BASE_LOCK" ] || [ ! -f "$BASE_TAR" ]; then
    echo "  - reinstallation de l'image de base"
    rm -rf "$BASE_DIR"
    new_package_base
    diff -u "$BASE_PKGS_FILE" "$BASE_PKGS_FILE".new && NEW_BASE=false || NEW_BASE=true
    if [ ! -f "$BASE_TAR" ] || [ "$NEW_BASE" = true ]; then
        mkdir -p "$IMAGE_BASE_RISOTTO_BASE_DIR"
        install_base
        cd "$IMAGE_BASE_RISOTTO_BASE_DIR"
        tar cf "$BASE_TAR" "$BASE_NAME"
        cd - > /dev/null
        if [ -f "$BASE_PKGS_FILE" ]; then
            mv "$BASE_PKGS_FILE" "$BASE_PKGS_FILE".old
        fi
        mv "$BASE_PKGS_FILE".new "$BASE_PKGS_FILE"
        rm -rf "$IMAGE_BASE_RISOTTO_BASE_DIR"
    fi
    rm -rf "$BASE_DIR"
    touch "$BASE_LOCK"
fi

tar xf "$BASE_TAR"
mv "$BASE_NAME" "$IMAGE_NAME_RISOTTO_IMAGE_DIR"
if [ -n "$COPR" ]; then
    #FIXME signature...
    mkdir -p "$REPO_DIR"
    cd "$REPO_DIR"
    wget -q "$COPR"
    cd - > /dev/null
fi
if [ "$FUSION" = true ]; then
    dnf -y install "https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$RELEASEVER.noarch.rpm" --installroot="$IMAGE_NAME_RISOTTO_IMAGE_DIR" > /dev/null
fi

# FIXME verifier s'il y a des modifs sur pre/post
if [ -f "$IMAGE_NAME_RISOTTO_IMAGE_DIR".base.pkgs ] && [ -f "$IMAGE_NAME_RISOTTO_IMAGE_DIR".pkgs ]; then
    echo "  - différence(s) avec les paquets de base"
    diff -u "$IMAGE_NAME_RISOTTO_IMAGE_DIR".base.pkgs "$BASE_PKGS_FILE" && INSTALL=false || INSTALL=true
else
    INSTALL=true
fi
new_package
if [ "$INSTALL" = false ]; then
    echo "  - différence(s) avec les paquets de l'image"
    diff -u "$IMAGE_NAME_RISOTTO_IMAGE_DIR".pkgs "$IMAGE_NAME_RISOTTO_IMAGE_DIR".pkgs.new && INSTALL=false || INSTALL=true
fi
find "$IMAGE_DIR_RECIPIENT_IMAGE" -type f -exec md5sum '{}' \; > "$IMAGE_NAME_RISOTTO_IMAGE_DIR".md5sum.new
if [ "$INSTALL" = false ]; then
    diff -u "$IMAGE_NAME_RISOTTO_IMAGE_DIR".md5sum "$IMAGE_NAME_RISOTTO_IMAGE_DIR".md5sum.new && INSTALL=false || INSTALL=true
fi
if [ "$INSTALL" = true ]; then
    echo "  - installation"
    if [ -f "$IMAGE_NAME_RISOTTO_IMAGE_DIR"_"$RELEASEVER".version ]; then
        VERSION=$(cat "$IMAGE_NAME_RISOTTO_IMAGE_DIR"_"$RELEASEVER".version)
    else
        VERSION=0
    fi
    mkdir "$RISOTTO_IMAGE_DIR/tmp"
    ORI_DIR=$PWD
    cd "$RISOTTO_IMAGE_DIR/tmp"
    if [ ! "$VERSION" = 0 ] && [ -f "$IMAGE_NAME_RISOTTO_IMAGE_NAME" ]; then
        tar xf "$IMAGE_NAME_RISOTTO_IMAGE_NAME"
#        if [ "$INSTALL_TOOL" = "apt" ]; then
#            chown _apt "$IMAGE_NAME"
#        fi
#    else
#        mkdir "$IMAGE_NAME"
    fi
    #cd "$IMAGE_NAME"
    make_changelog "$IMAGE_NAME" "$VERSION" "$OS_NAME" "$RELEASEVER" > "$IMAGE_NAME_RISOTTO_IMAGE_DIR"_"$RELEASEVER"_"$VERSION"_changelog.md
    cd $ORI_DIR
    rm -rf "$RISOTTO_IMAGE_DIR/tmp"
    install_pkg
    sleep 2
    
    for script in $(ls $IMAGE_DIR_RECIPIENT_IMAGE/postinstall/*.sh 2> /dev/null); do
        . "$script"
    done
    
    CONTAINER=$IMAGE_NAME make_volatile /etc
    if [ ! "$?" = 0 ]; then
        echo "make_volatile failed"
        exit 1
    fi
    cd "$RISOTTO_IMAGE_DIR/$IMAGE_NAME"
    if [ -f "$IMAGE_NAME_RISOTTO_IMAGE_NAME" ]; then
        mv -f "$IMAGE_NAME_RISOTTO_IMAGE_NAME" "$IMAGE_NAME_RISOTTO_IMAGE_NAME".old
    fi
    tar cf "$IMAGE_NAME_RISOTTO_IMAGE_NAME" .
    sha256sum "$IMAGE_NAME_RISOTTO_IMAGE_NAME" > "$IMAGE_NAME_RISOTTO_IMAGE_NAME".sha
    cd - > /dev/null
    cp -f "$BASE_PKGS_FILE" "$IMAGE_NAME_RISOTTO_IMAGE_DIR".base.pkgs
    mv -f "$IMAGE_NAME_RISOTTO_IMAGE_DIR".pkgs.new "$IMAGE_NAME_RISOTTO_IMAGE_DIR".pkgs
    mv -f "$IMAGE_NAME_RISOTTO_IMAGE_DIR".md5sum.new "$IMAGE_NAME_RISOTTO_IMAGE_DIR".md5sum
    VERSION=$((VERSION + 1)) 
    echo "$VERSION" > "$IMAGE_NAME_RISOTTO_IMAGE_DIR"_"$RELEASEVER".version
fi
rm -rf "$IMAGE_NAME_RISOTTO_IMAGE_DIR"

echo "  => OK"
exit 0