#!/bin/bash

# check number of arguments
if [ $# -eq 0 ]
then
    echo "Usage: installer <CSV-FILE>"; exit 0
fi

# check first argument, '! -f' checks if it is NOT a file
if [ ! -f $1 ]
then
    echo "File $1 does not exist!"; exit -1
fi

# declare some variables
PACKAGE_FILE=$1
PKG_NUMBER=0

echo -n "Packages: "
while IFS=, read pkg_name pkg_ver pkg_url pkg_checksum
do
    echo -n "$pkg_name "
    let PKG_NUMBER=PKG_NUMBER+1
done < $PACKAGE_FILE

echo -e "\nNumber of packages: $PKG_NUMBER"
echo -n "Sure you want to install all packages[Y/n]? "
read INPUT

# If 'Y', 'y' or '' is entered, continue, else exit.
if [ $INPUT != "Y" ] && [ $INPUT != "y" ] && [ $INPUT != "" ]
then
    echo "Aborting installation ..."; echo; exit 0
fi

# create a directory with has a unique name.
# This pipes the current date through base64
# which converts the string into base64
# (alphabet with 64 letters; a to z, A to Z,'+' and '/')
TMP_DIR="/tmp/$(date|base64)"

# if this directory already exist, try again until it works
until mkdir $TMP_DIR
do
    TMP_DIR="/tmp/$(date|base64)"
done

# save current directory
OLD_DIR="${PWD}"

# check is 'MY_LIBS' is set, if not set it to some
# default value
if [ -z $MY_LIBS ]
then
    MY_LIBS="$OLD_DIR/libs"
fi

# check if 'MY_LIBS' is a real diretory
if [ ! -d $MY_LIBS ]
then
    mkdir $MY_LIBS
fi

# first copy package file to temp folder
cp "$PACKAGE_FILE" "$TMP_DIR/$PACKAGE_FILE"

# change directory
cd $TMP_DIR

# Number of installed packages
PKG_INSTALLED=0

mkdir "download"
cd "download"

CONFIG_FILE="../$PACKAGE_FILE"

# Go through each package and install it
while IFS=, read pkg_name pkg_ver pkg_url pkg_checksum
do
    # Step 1: Download package
    FILENAME=$(basename "$pkg_url") # get name of file
    if ! wget -q --show-progress --progress=bar:force $pkg_url
    then
    # clean up directory
    rm -R -f * # clean up everything in tmp folder
    echo "Package '$pkg_name' could not be downloaded from $pkg_url!"; exit -1;
    fi

    # Step 2: Unpack package according to suffix
    if file --mime-type "$FILENAME" | grep -q ".tar.gz"; then
    if ! tar xfz "$FILENAME" -C "." --strip 1; then
        echo "ERROR: could not unpack $FILENAME!"
        continue;
    fi
    elif file --mime-type "$FILENAME" | grep ".tar.xz"; then
    if ! tar xf "$FILENAME" -C "." --strip 1; then
        echo "ERROR: could not unpack $FILENAME!"
        continue;
    fi
    elif file --mime-type "$FILENAME" | grep ".zip"; then
    if ! unzip "$FILENAME" -d "."; then
        echo "ERROR: could not unpack $FILENAME!"
        continue;
    fi
    else
    echo "ERROR: not supported file format!"
    continue;
    fi

    # Step 3: Check Checksum
    # need more information to perform checksum, sha1 md5 BSD which checksum to use?

    # Step 4: install it
    if ! /bin/bash ./configure; then
    echo "ERROR: configure!"
    continue
    fi
    if ! make; then
    echo "ERROR: make!"
    continue
    fi
#   if ! make install; then
#       echo "ERROR: make install"
#   continue
#   fi

    # Step 5: copy everything to location
    cp -R * $MY_LIBS

    # Step 6: delete files and continue
    rm -R -f *

    let PKG_INSTALLED=PKG_INSTALLED+1
done < $CONFIG_FILE

# remove all temp files
rm -R -f $TMP_DIR

echo "Installed $PKG_INSTALLED/$PKG_NUMBER packages."
echo "Checkout $MY_LIBS for the packages!"