#!/bin/bash

set -e
set -u

APPSH_HOME=$(cd $(dirname "$0")/.. && pwd)

. $APPSH_HOME/lib/common
# HEADER END

usage() {
  echo "usage: $0 -d dir <resolver> <resolver args>"
  exit 1
}

fatal() {
  echo "$0: $@"
  exit 1
}

while getopts "d:" opt
do
  case $opt in
    d)
      dir=$OPTARG
      shift 2
      OPTIND=1
      ;;
  esac
done

if [ $# -lt 1 ]
then
  usage
fi

resolver_name="$1"; shift

if [ -z "$dir" ]
then
  usage
fi

if [ -e "$dir" ]
then
  fatal "Already initialized: $dir" 2>&1
fi

# TODO: install a trap handler and rm -rf "$dir"

resolver=`grep_path "/app-resolver-$resolver_name$" "$PATH:$APPSH_HOME/libexec" | head -n 1`

if [ -z "$resolver" ]
then
  echo "No such resolver: $resolver_name" 2>&1
  exit 1
fi

mkdir -- "$dir" "$dir/.app"
cd "$dir"

app-conf set app.resolver "$resolver_name"

"$resolver" init "$@"
"$resolver" resolve-version

version=`app-conf get app.version`

if [[ $version == "" ]]
then
  echo "Unable to resolve version" 2>&1
  exit
fi

echo "Resolved version to $version"

"$resolver" download-version -v "$version" -f .app/latest.zip