#!/bin/sh

#################################
# Alnux Packaging System,       #
# the package manager for Alnux #
#################################

if [ -f "$XDG_CONFIG_HOME/al/config" ]; then
	. $XDG_CONFIG_HOME/al/config
elif [ -f "$HOME/.config/al/config" ]; then
	. $HOME/.config/al/config
elif [ -f "/etc/al/config" ]; then
	. /etc/al/config
else
	temp_location="/var/tmp"
	install_root="/var/tmp/alroot"
	installed_pkg_database="${install_root}/var/aps/installed"
	locpkg_database="${install_root}/var/aps/repos"
	lock="${install_root}/var/aps/lock"
	official="https://git.hippoz.xyz/alnux/repo"
	debug=off
fi
if [ ${debug} = on ]; then
	set -x
fi
die() {
    echo "aps: fatal: ${1}"
    rm "${lock}"
    exit 2
}
confirm(){
        echo -ne "Are you sure? [Y/n] "
        read prompt
        if [[ ${prompt} = [nN] ]]; then
                die "User said no. Exiting..."
        elif [[ ${prompt} != [yY] ]]; then
                die "User gave invalid input. Exiting..."
        fi
}
run_package_script() {
    {
        if [ -x "${2}/${1}" ]; then
            echo ":: Running ${1}"
            #cd "${2}" || die "Could not enter package working directory. Exiting..."
            "${2}/${1}" "${2}/payload" "${2}"
        fi
    }
}
install_local_package() {
    [ ! -e "${1}" ] && die "File ${1} does not exist. Exiting..."
    # Extract the package
    confirm
    echo ":: Installing package ${1}"
    cp -prv "${1}" "${temp_location}"
    pkg_name="${1%/}"
    pkg_name="${pkg_name##*/}"
    pkg_name=$(echo "${pkg_name}" | cut -f 1 -d '.')
    pkg_path="${temp_location}/${pkg_name}"
    cd "${pkg_path}" || die "Could not enter package path."
    # Set default values for package
    pkg_config_deploy=true
    pkg_config_ver="0"
    pkg_config_makedepends=""
    pkg_config_depends=""
    # Download sources.
    if [ -f sources ]; then
    	pkg_config_sources=$(cat sources)
    	pkg_config_sources_to=$(echo ${pkg_config_sources} | sed 's:.*/::')	
    	curl -# ${pkg_config_sources}
        mkdir pkg_bd
	    tar -xf 1 ${pkg_config_sources_to} -C ${pkg_path}
    fi
    # Install package
    mkdir -p "${pkg_path}/payload"
    . "${pkg_path}/package"
    cd pkg_bd/
    run_package_script "build" "${pkg_path}"
    cd ../..
    run_package_script "predeploy" "${pkg_path}"
    # Deploy package
    if [ "${pkg_config_deploy}" = true ]; then
        echo ":: Deploying target ${pkg_name}..."
        cp -rpv "${pkg_path}/payload"/* "${install_root}" > "${temp_location}/${pkg_name}-payloaddeploylog"
        sed 's/^.*-> //' "${temp_location}/${pkg_name}-payloaddeploylog" | tr -d \'\" > "${temp_location}/${pkg_name}-payloadfiles"
        rm "${temp_location}/${pkg_name}-payloaddeploylog"
    fi
    run_package_script "postdeploy" "${pkg_path}"
    # Add package to database
    if [ -x "${pkg_path}/package" ]; then
        echo ":: Adding target ${pkg_name} to installed package database..."
        [ ! -d "${installed_pkg_database}/${pkg_name}" ] && mkdir "${installed_pkg_database}/${pkg_name}"
        cp -pv "${pkg_path}/package" "${installed_pkg_database}/${pkg_name}/package"
        [ -e "${temp_location}/${pkg_name}-payloadfiles" ] && cp -pv "${temp_location}/${pkg_name}-payloadfiles" "${installed_pkg_database}/${pkg_name}/payloadfiles"
    else
        die "Target ${pkg_name} does not have a package script (it's an invalid package!). Exiting..."
    fi
    # Cleanup
    rm -r "${pkg_path}"
    rm "${temp_location}/${pkg_name}-payloadfiles"
    cd "${install_root}" || die "Could not return to main directory. Exiting..."
    unset pkg_path
    unset pkg_name
    unset pkg_config_deploy
    unset pkg_config_ver
    unset pkg_config_makedepends
    unset pkg_config_depends
    echo "[*] Install complete for package ${pkg_name}"
}
sync_deps(){
    confirm
    echo ":: Syncing dependencies for ${1}"
    install_package_from_repo "${pkg_makedepends}"
    install_package_from_repo "${pkg_deps}"
    echo "[*] Install dependencies for ${1}"

}
remove_local_package() {
    confirm
    echo ":: Removing target ${1}..."
    pkg_path="${installed_pkg_database}/${1}"
    [ ! -d "${pkg_path}" ] && die "Package could not be found in local installed package database. Exiting..."
    payloadfiles_path="${pkg_path}/payloadfiles"
    [ ! -e "${payloadfiles_path}" ] && die "[E] Package ${1} does not have a payloadfiles file. Exiting..."
    rm -rv "$(cat ${payloadfiles_path})"
    rm -rv "${pkg_path}"
    echo "[*] Removal complete for target ${pkg_name}"
}
sync_local_repo_database() {
    echo ":: Syncing local database for repo ${1}"
    if [ ! -d "${locpkg_database}/${1}" ]; then
        # Local database for repo doesnt exists - clone it
        git clone "${2}" "${locpkg_database}/${1}"
    else
        # Local database for repo already exists - sync it
        cd "${locpkg_database}/${1}" || die "Could not enter local database directory. Exiting..."
        git pull
    fi
}
install_package_from_repo() { # NOTE(hippoz): This can get a tad confusing... ${1} is the repo and ${2} is the package
    echo ":: Installing package ${2} from ${1} repo"
    [ ! -d "${locpkg_database}/${1}/${2}" ] && die "Target not found."
    install_local_package "${locpkg_database}/${1}/${2}"
}
upgrade() {
    confirm
    echo ":: Upgrading installed packages"
    cd "${installed_pkg_database}" || die "Could not enter local installed package database directory. Exiting..."
    for pkg in */; do
        installed_pkg_path="${installed_pkg_database}/${pkg}"
        . "${installed_pkg_path}/package"
        pkg_name="${installed_pkg_path%/}"
        pkg_name="${pkg_name##*/}"
        already_installed_version=${pkg_config_ver}
        [ ! -d "${locpkg_database}/${1}/${pkg_name}" ] && die "Package ${pkg_name} was not found in ${1}. Exiting..."
        . "${locpkg_database}/${1}/${pkg_name}/package"
        if [ ! "${already_installed_version}" = "${pkg_config_ver}" ]; then
            echo ":: Updating package ${pkg_name} (out of date)"
            install_package_from_repo "${1}" "${pkg_name}"
        fi
        unset pkg_config_deploy
        unset pkg_config_ver
        unset pkg_config_makedepends
        unset pkg_config_depends
    done
}
version(){
	echo "Alnux APS v0.0.8.1"
}
help(){
	echo "Alnux APS, the packaging system for Alnux."
        echo ""
	echo "sync    - Synchronizes from package repository."
	echo "install - Installs from local package information file and build file."
	echo "upgrade - Upgrades from package repository."
	echo "remove  - Removes a package from /var/aps/installed and it's install files (payloadfiles)."
	echo "list    - Lists currently installed packages."
	echo "help    - Display this message."
	echo "version - Display the version."
}
list(){
	ls ${installed_pkg_database} | sed 's/^README.md//g'
}
main() {
    if [ -f "${lock}" ]; then
        echo "A lock file already exists (another instance of the package manager could be running). If you're sure no package manager is running, remove the file ${lock}."
        exit 1
    fi
    touch "${lock}"
    case ${1} in
        install) install_local_package "${2}" ;;
        remove) remove_local_package "${2}" ;;
        #sync-dep)
        #    sync_local_repo_database "official" ${official}
        #    [ -z "${2}" ] && exit 0
        #    install_package_from_repo "official" "${2}" ;;
        sync)
            sync_local_repo_database "official" ${official}
            [ -z "${2}" ] && exit 0
            install_package_from_repo "official" "${2}" ;;
        upgrade) upgrade "official" ;;
	help) help ;;
	version) version ;;
	list) list ;;
        *) die "Invalid option ${1}, exiting..." ;;
    esac
    rm "${lock}"
}
main "${1}" "${2}"