#!/bin/bash

set -euo pipefail # Exit on errors and undefined variables.

# Get the directory of this script:
# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

NPM_LOCK="$DIR/package-lock.json"
NPM_LOCK_EXISTS=""
if [[ -f "$NPM_LOCK" ]]; then
  NPM_LOCK_EXISTS="1"
  rm -f "$NPM_LOCK"
  echo "Successfully deleted: $NPM_LOCK"
fi

YARN_LOCK="$DIR/yarn.lock"
YARN_LOCK_EXISTS=""
if [[ -f "$YARN_LOCK" ]]; then
  YARN_LOCK_EXISTS="1"
  rm -f "$YARN_LOCK"
  echo "Successfully deleted: $YARN_LOCK"
fi

PNPM_LOCK="$DIR/pnpm-lock.yaml"
PNPM_LOCK_EXISTS=""
if [[ -f "$PNPM_LOCK" ]]; then
  PNPM_LOCK_EXISTS="1"
  rm -f "$PNPM_LOCK"
  echo "Successfully deleted: $PNPM_LOCK"
fi

NODE_MODULES="$DIR/node_modules"
if [[ -d "$NODE_MODULES" ]]; then
  rm -rf "$NODE_MODULES"
  echo "Successfully deleted: $NODE_MODULES"
fi

if [[ -z "$NPM_LOCK_EXISTS" && -z "$YARN_LOCK_EXISTS" && -z "$PNPM_LOCK_EXISTS" ]]; then
  echo "No package manager lock files were found. You should manually invoke the package manager that you want to use for this project. e.g. \"npm install\""
  exit 1
elif [[ -n "$NPM_LOCK_EXISTS" && -z "$YARN_LOCK_EXISTS" && -z "$PNPM_LOCK_EXISTS" ]]; then
  npm install
elif [[ -z "$NPM_LOCK_EXISTS" && -n "$YARN_LOCK_EXISTS" && -z "$PNPM_LOCK_EXISTS" ]]; then
  yarn install
elif [[ -z "$NPM_LOCK_EXISTS" && -z "$YARN_LOCK_EXISTS" && -n "$PNPM_LOCK_EXISTS" ]]; then
  pnpm install
else
  echo "Error: Multiple different kinds of package manager lock files were found. You should delete the ones that you are not using so that this program can correctly detect your package manager."
  exit 1
fi

echo "Successfully reinstalled Node dependencies."