#!/bin/bash

SELF_DIRNAME="`dirname -- "$0"`"

# The first argument is always the scenario name. Options come after.
SCENARIO="$1"
shift

#
# This script is typically called after `composer update` from a
# "post-update-cmd" in the "scripts" section of composer.json.
#

# Defaults
PLATFORM_PHP="--unset"
STABILITY="stable"
CREATE_LOCKFILE=true
AUTOLOAD_DIRECTORIES="src tests"
REMOVALS=
REQUIREMENTS=
BASE=..

echo
echo "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"
echo "::"
echo ":: Create scenario ${SCENARIO}"
echo "::"
echo "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"
echo

while [ $# -gt 0 ] ; do

  option="$1"
  shift

  case "$option" in
    --unset-platform-php)
      PLATFORM_PHP="--unset"
      shift
      ;;

    --platform-php)
      PLATFORM_PHP="$1"
      shift
      ;;

    --stability)
      STABILITY="$1"
      shift
      ;;

    --create-lockfile)
      CREATE_LOCKFILE=true
      ;;

    --no-lockfile)
      CREATE_LOCKFILE=false
      ;;

    --autoload-dir)
      autoload_dir="$1"
      shift
      AUTOLOAD_DIRECTORIES="${AUTOLOAD_DIRECTORIES} ${autoload_dir}"
      ;;

    --remove)
      project_to_remove="$1"
      shift
      REMOVALS="${REMOVALS} ${project_to_remove}"
      ;;

    --keep)
      keep_pattern="$1"
      shift
      projects_to_remove="$(composer info --direct | cut -f 1 -d ' ' | grep -v $keep_pattern)"
      REMOVALS="${REMOVALS} ${projects_to_remove}"
      ;;

    --base)
      BASE="$1"
      shift
      ;;

    -*)
      echo "Unknown option $option"
      exit 1;
      ;;

    *)
      REQUIREMENTS="${REQUIREMENTS} ${option}"
      ;;
  esac
done

set -ex

original_name=scenarios
recommended_name=".scenarios.lock"

scenarios_dir="$original_name"
if [ -d "$recommended_name" ] ; then
  scenarios_dir="$recommended_name"
fi

# Create the scenario directory, and start with a fresh composer.json file.
dir="$scenarios_dir/${SCENARIO}"
mkdir -p $dir
cp $scenarios_dir/$BASE/composer.json $dir

# Then set our own platform php version if applicable (otherwise unset it)
[[ -z "${PLATFORM_PHP}" ]] ||  composer -n --working-dir=$dir config platform.php "${PLATFORM_PHP}"

# Set an appropriate minimum stability for this version of Symfony
composer -n --working-dir=$dir config minimum-stability "${STABILITY}"

# Remove components that are not desired.
# We do not care whether a component is present in the `require` or
# `require-dev` section; we will attempt to remove each request from
# both. This may produce warning messages.
[[ -z "${REMOVALS}" ]] || composer -n --working-dir=$dir remove --no-update ${REMOVALS}
[[ -z "${REMOVALS}" ]] || composer -n --working-dir=$dir remove --no-update --dev ${REMOVALS} >/dev/null 2>&1

# Add a constraint
[[ -z "${REQUIREMENTS}" ]] || composer -n --working-dir=$dir require --dev --no-update ${REQUIREMENTS}

# Never commit a cached 'vendor' directory in the scenario folder
echo 'vendor' > $dir/.gitignore

# Create a lockfile via `composer update`, if requested
if $CREATE_LOCKFILE ; then

  # Temporarily set our vendor directory to 'vendor'
  composer -n --working-dir=$dir config vendor-dir vendor

  # Create the composer.lock file. Ignore the vendor directory created.
  composer -n --working-dir=$dir update --no-scripts

else

  # If we are not storing a composer.lock, mark it as ignored if
  # transiently generated in the future
  echo 'composer.lock' >> $dir/.gitignore

fi

# Set the vendor directory to its final desired location.
composer -n --working-dir=$dir config vendor-dir '../../vendor'

# The 'autoload' section specifies directory paths that are relative
# to the composer.json file. We will drop in some symlinks so that
# these paths will resolve as if the composer.json were in the root.
for target in ${AUTOLOAD_DIRECTORIES} ; do
  [[ ! -d "$target" ]] || ln -s -f ../../$target $dir
done

# Copy our install-scenario script in so that it may be committed with our composer.lock files
cp -f ${SELF_DIRNAME}/install-scenario $dir/../install
chmod +x $dir/../install