#! /usr/bin/env bash

set -euo pipefail

#### Detect Toolkit Project Root ####
# if realpath is not available, create a semi-equivalent function
command -v realpath >/dev/null 2>&1 || realpath() {
  [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
}
SCRIPT_PATH="$(realpath "${BASH_SOURCE[0]}")"
SCRIPT_DIR="$(dirname "$SCRIPT_PATH")"
TOOLKIT_ROOT="$(realpath "$SCRIPT_DIR/..")"
if [[ ! -d "$TOOLKIT_ROOT/bin" ]] || [[ ! -d "$TOOLKIT_ROOT/config" ]]; then
  echo "ERROR: could not find root of overleaf-toolkit project (inferred project root as '$TOOLKIT_ROOT')"
  exit 1
fi


function usage() {
  echo "Usage:
    bin/run-script [-e 'VAR1=value VAR2=value'] [SCRIPT...] [SCRIPT_ARGS..]
    bin/run-script [OPTIONS]

Options:
    help              prints this help
    ls                prints a list of all available scripts
    -e                space-separated list of environment variables (optional)

Examples:
    bin/run-script scripts/create_project.js --user-id=649c3f45711ad101a13de737
    bin/run-script -e 'PROJECT_ID=5ac1011aa13de547c3fd' scripts/delete_dangling_file_refs.js
    bin/run-script ls"
}


function __main__() {
  local env_vars=''
  while getopts ":e:" opt
  do
    case $opt in
      e ) env_vars="${OPTARG}" ;;
      \?) usage && exit ;;
      : ) usage && exit ;;
    esac
  done
  shift $(( OPTIND -1 ))

  if [[ "${1:-null}" == "null" ]] \
    || [[ "${1:-null}" == "help" ]] \
    || [[ "${1:-null}" == "--help" ]] ; then
    usage && exit
  fi

  if [[ "${1:-null}" == "ls" ]] || [[ "${1:-null}" == "--ls" ]]; then
    # runs `ls` excluding dirs and adds the name of the directory as prefix
    local cmd="cd /overleaf/services/web && find scripts/ modules/server-ce-scripts/scripts/ -maxdepth 1 -type f"
    exec "$TOOLKIT_ROOT/bin/docker-compose" exec sharelatex bash -c "$cmd"
    exit
  fi

  local container_env="source /etc/overleaf/env.sh || source /etc/sharelatex/env.sh && source /etc/container_environment.sh"
  local run_cmd="${container_env} && cd /overleaf/services/web && ${env_vars} node $@"
  exec "$TOOLKIT_ROOT/bin/docker-compose" exec sharelatex bash -c "$run_cmd"
}

__main__ "$@"