#!/bin/bash

load_env_file() {
  local env_file="$1"
  if [ ! -f "$env_file" ]; then
    return 0
  fi

  while IFS= read -r raw_line || [ -n "$raw_line" ]; do
    local line key value
    line="${raw_line%$'\r'}"

    [[ -z "${line//[[:space:]]/}" ]] && continue
    [[ "$line" =~ ^[[:space:]]*# ]] && continue
    [[ "$line" != *"="* ]] && continue

    key="${line%%=*}"
    value="${line#*=}"
    key="${key#${key%%[![:space:]]*}}"
    key="${key%${key##*[![:space:]]}}"

    if [[ ! "$key" =~ ^[A-Za-z_][A-Za-z0-9_]*$ ]]; then
      continue
    fi

    value="${value#${value%%[![:space:]]*}}"
    value="${value%${value##*[![:space:]]}}"

    if [[ "$value" =~ ^\".*\"$ ]]; then
      value="${value:1:${#value}-2}"
    elif [[ "$value" =~ ^\'.*\'$ ]]; then
      value="${value:1:${#value}-2}"
    fi

    export "$key=$value"
  done < "$env_file"
}