#!/usr/bin/env bash

set -e

init_env_file() {
  CONF_PATH="/appsmith-stacks/configuration"
  ENV_PATH="$CONF_PATH/docker.env"
  TEMPLATES_PATH="/opt/appsmith/templates"
  echo "Initialize .env file"
  if ! [[ -e "$ENV_PATH" ]]; then
    # Generate new docker.env file when initializing container for first time or in Heroku which does not have persistent volume
    echo "Generating default configuration file"
    mkdir -p "$CONF_PATH"
    APPSMITH_MONGODB_USER="appsmith"
    APPSMITH_MONGODB_PASSWORD=$(
      tr -dc A-Za-z0-9 </dev/urandom | head -c 13
      echo ""
    )
    APPSMITH_ENCRYPTION_PASSWORD=$(
      tr -dc A-Za-z0-9 </dev/urandom | head -c 13
      echo ""
    )
    APPSMITH_ENCRYPTION_SALT=$(
      tr -dc A-Za-z0-9 </dev/urandom | head -c 13
      echo ""
    )
    bash "$TEMPLATES_PATH/docker.env.sh" "$APPSMITH_MONGODB_USER" "$APPSMITH_MONGODB_PASSWORD" "$APPSMITH_ENCRYPTION_PASSWORD" "$APPSMITH_ENCRYPTION_SALT" > "$ENV_PATH"
  fi

  printenv | grep -E '^APPSMITH_|^MONGO_' > "$TEMPLATES_PATH/pre-define.env"


  echo "Load environment configuration"
  set -o allexport
  . "$ENV_PATH"
  . "$TEMPLATES_PATH/pre-define.env"
  set +o allexport
}

unset_unused_variables() {
  # Check for enviroment vairalbes
  echo "Checking environment configuration"
  if [[ -z "${APPSMITH_MAIL_ENABLED}" ]]; then
    unset APPSMITH_MAIL_ENABLED # If this field is empty is might cause application crash
  fi

  if [[ -z "${APPSMITH_OAUTH2_GITHUB_CLIENT_ID}" ]] || [[ -z "${APPSMITH_OAUTH2_GITHUB_CLIENT_SECRET}" ]]; then
    unset APPSMITH_OAUTH2_GITHUB_CLIENT_ID # If this field is empty is might cause application crash
    unset APPSMITH_OAUTH2_GITHUB_CLIENT_SECRET
  fi

  if [[ -z "${APPSMITH_OAUTH2_GOOGLE_CLIENT_ID}" ]] || [[ -z "${APPSMITH_OAUTH2_GOOGLE_CLIENT_SECRET}" ]]; then
    unset APPSMITH_OAUTH2_GOOGLE_CLIENT_ID # If this field is empty is might cause application crash
    unset APPSMITH_OAUTH2_GOOGLE_CLIENT_SECRET
  fi

  if [[ -z "${APPSMITH_GOOGLE_MAPS_API_KEY}" ]]; then
    unset APPSMITH_GOOGLE_MAPS_API_KEY
  fi

  if [[ -z "${APPSMITH_RECAPTCHA_SITE_KEY}" ]] || [[ -z "${APPSMITH_RECAPTCHA_SECRET_KEY}" ]] || [[ -z "${APPSMITH_RECAPTCHA_ENABLED}" ]]; then
    unset APPSMITH_RECAPTCHA_SITE_KEY # If this field is empty is might cause application crash
    unset APPSMITH_RECAPTCHA_SECRET_KEY
    unset APPSMITH_RECAPTCHA_ENABLED
  fi
}

check_mongodb_uri() {
  echo "Checking APPSMITH_MONGODB_URI"
  isUriLocal=1
  if [[ $APPSMITH_MONGODB_URI == *"localhost"* || $APPSMITH_MONGODB_URI == *"127.0.0.1"* ]]; then
    echo "Detected local MongoDB"
    isUriLocal=0
  fi
}

init_mongodb() {
  if [[ $isUriLocal -eq 0 ]]; then
    echo "Initializing local database"
    MONGO_DB_PATH="/appsmith-stacks/data/mongodb"
    MONGO_LOG_PATH="$MONGO_DB_PATH/log"
    MONGO_DB_KEY="$MONGO_DB_PATH/key"
    mkdir -p "$MONGO_DB_PATH"
    touch "$MONGO_LOG_PATH"

    if [[ -f "$MONGO_DB_KEY" ]]; then
      chmod-mongodb-key "$MONGO_DB_KEY"
    fi
  fi
}

init_replica_set() {
  echo "Checking initialized database"
  shouldPerformInitdb=1
  for path in \
    "$MONGO_DB_PATH/WiredTiger" \
    "$MONGO_DB_PATH/journal" \
    "$MONGO_DB_PATH/local.0" \
    "$MONGO_DB_PATH/storage.bson"; do
    if [ -e "$path" ]; then
      shouldPerformInitdb=0
      break
    fi
  done

  if [[ $shouldPerformInitdb -gt 0 && $isUriLocal -eq 0 ]]; then
    echo "Initializing Replica Set for local database"
    # Start installed MongoDB service - Dependencies Layer
    mongod --fork --port 27017 --dbpath "$MONGO_DB_PATH" --logpath "$MONGO_LOG_PATH"
    echo "Waiting 10s for MongoDB to start"
    sleep 10
    echo "Creating MongoDB user"
    bash "/opt/appsmith/templates/mongo-init.js.sh" "$APPSMITH_MONGODB_USER" "$APPSMITH_MONGODB_PASSWORD" > "/appsmith-stacks/configuration/mongo-init.js"
    mongo "127.0.0.1/appsmith" /appsmith-stacks/configuration/mongo-init.js
    echo "Enabling Replica Set"
    mongod --dbpath "$MONGO_DB_PATH" --shutdown || true
    openssl rand -base64 756 > "$MONGO_DB_KEY"
    chmod-mongodb-key "$MONGO_DB_KEY"
    mongod --fork --port 27017 --dbpath "$MONGO_DB_PATH" --logpath "$MONGO_LOG_PATH" --replSet mr1 --keyFile "$MONGO_DB_KEY" --bind_ip localhost
    echo "Waiting 10s for MongoDB to start with Replica Set"
    sleep 10
    mongo "$APPSMITH_MONGODB_URI" --eval 'rs.initiate()'
    mongod --dbpath "$MONGO_DB_PATH" --shutdown || true
  fi

  if [[ $isUriLocal -gt 0 ]]; then
    # Check mongodb cloud Replica Set
    echo "Checking Replica Set of external MongoDB"

    if appsmithctl check_replica_set; then
      echo "Mongodb cloud Replica Set is enabled"
      mongo "$APPSMITH_MONGODB_URI" --eval 'rs.initiate()'
    else
      echo -e "\033[0;31m********************************************************************\033[0m"
      echo -e "\033[0;31m*          MongoDB Replica Set is not enabled                      *\033[0m"
      echo -e "\033[0;31m********************************************************************\033[0m"
      exit 1
    fi
  fi
}

chmod-mongodb-key() {
  chmod 600 "$1"
}

# Keep Let's Encrypt directory persistent
mount_letsencrypt_directory() {
  echo "Mounting Let's encrypt directory"
  rm -rf /etc/letsencrypt
  mkdir -p /appsmith-stacks/{letsencrypt,ssl}
  ln -s /appsmith-stacks/letsencrypt /etc/letsencrypt
}

configure_supervisord() {
  SUPERVISORD_CONF_PATH="/opt/appsmith/templates/supervisord"
  if [[ -n "$(ls -A /etc/supervisor/conf.d)" ]]; then
    rm -f "/etc/supervisor/conf.d/"*
  fi

  cp -f "$SUPERVISORD_CONF_PATH/application_process/"*.conf /etc/supervisor/conf.d

  # Disable services based on configuration
  if [[ $isUriLocal -eq 0 ]]; then
    cp "$SUPERVISORD_CONF_PATH/mongodb.conf" /etc/supervisor/conf.d/
  fi
  if [[ "$APPSMITH_REDIS_URL" = "redis://127.0.0.1:6379" ]]; then
    cp "$SUPERVISORD_CONF_PATH/redis.conf" /etc/supervisor/conf.d/
    # Enable saving Redis session data to disk more often, so recent sessions aren't cleared on restart.
    sed -i 's/^# save 60 10000$/save 60 1/g' /etc/redis/redis.conf
  fi
  if ! [[ -e "/appsmith-stacks/ssl/fullchain.pem" ]] || ! [[ -e "/appsmith-stacks/ssl/privkey.pem" ]]; then
    cp "$SUPERVISORD_CONF_PATH/cron.conf" /etc/supervisor/conf.d/
  fi
}

# Main Section
init_env_file
unset_unused_variables
check_mongodb_uri
init_mongodb
init_replica_set
mount_letsencrypt_directory
configure_supervisord

# Ensure the restore path exists in the container, so an archive can be copied to it, if need be.
mkdir -p /appsmith-stacks/data/{backup,restore}

# Create sub-directory to store services log in the container mounting folder
mkdir -p /appsmith-stacks/logs/{backend,cron,editor,rts,mongodb,redis}

# Handle CMD command
exec "$@"