#!/bin/bash

if [ -z "$1" ]; then
  echo "Use: $0 <var_name> [value]"
  exit 1
fi

VARIABLE_NAME=$1
ENV_FILE="/data/gitea-init/install.env"

trap 'echo -e "\033[31menv-gen-install.sh: Something went wrong\033[0m"; exit 1' ERR
set -e

# Password gen: 20chars,0-9,a-z
generate_random_password() {
  pwgen -s 20 1
}

# If the second parameter is specified, use it as the value of the variable
if [ -n "$2" ]; then
  VALUE=$2
else
  VALUE=$(generate_random_password)
fi

echo "Creating dir and .env file if it doesn't exist..."
if [ ! -f "$ENV_FILE" ]; then
  mkdir -p "$(dirname "$ENV_FILE")"
  touch "$ENV_FILE"
fi

echo "Update or add a variable to the .env file..."
if grep -q "^$VARIABLE_NAME=" "$ENV_FILE"; then
  # The variable exists, update its value
  sed -i "s/^$VARIABLE_NAME=.*/$VARIABLE_NAME=$VALUE/" "$ENV_FILE"
else
  # The variable does not exist, add it to the file
  echo "$VARIABLE_NAME=$VALUE" >> "$ENV_FILE"
fi

trap - ERR
echo "Variable $VARIABLE_NAME successfully updated/added to $ENV_FILE"