func Load() *Config {
    return &Config{
        EnvKeys:          os.Getenv("INPUT_ENV_KEY"),
        EnvValues:        os.Getenv("INPUT_ENV_VALUE"),
        OutputKeys:       os.Getenv("INPUT_OUTPUT_KEY"),
        OutputValues:     os.Getenv("INPUT_OUTPUT_VALUE"),
        GithubEnv:        os.Getenv("GITHUB_ENV"),
        GithubOutput:     os.Getenv("GITHUB_OUTPUT"),
        Delimiter:        getEnvWithDefault("INPUT_DELIMITER", ","),
        FailOnEmpty:      getBoolEnv("INPUT_FAIL_ON_EMPTY", true),
        TrimWhitespace:   getBoolEnv("INPUT_TRIM_WHITESPACE", true),
        CaseSensitive:    getBoolEnv("INPUT_CASE_SENSITIVE", true),
        ErrorOnDuplicate: getBoolEnv("INPUT_ERROR_ON_DUPLICATE", true),
        MaskSecrets:      getBoolEnv("INPUT_MASK_SECRETS", false),
        MaskPattern:      getEnvWithDefault("INPUT_MASK_PATTERN", ""),
        ToUpper:          getBoolEnv("INPUT_TO_UPPER", false),
        ToLower:          getBoolEnv("INPUT_TO_LOWER", false),
        EncodeURL:        getBoolEnv("INPUT_ENCODE_URL", false),
        EscapeNewlines:   getBoolEnv("INPUT_ESCAPE_NEWLINES", true),
        MaxLength:        getIntEnv("INPUT_MAX_LENGTH", 0),
        AllowEmpty:       getBoolEnv("INPUT_ALLOW_EMPTY", false),
        DebugMode:        getBoolEnv("DEBUG_MODE", false),
    }
}

// Environment Variable Names Constants
const (
    // Input Environment Variables
    EnvKeyInput           = "INPUT_ENV_KEY"
    EnvValueInput         = "INPUT_ENV_VALUE"
    OutputKeyInput        = "INPUT_OUTPUT_KEY"
    OutputValueInput      = "INPUT_OUTPUT_VALUE"
    DelimiterInput        = "INPUT_DELIMITER"
    FailOnEmptyInput      = "INPUT_FAIL_ON_EMPTY"
    TrimWhitespaceInput   = "INPUT_TRIM_WHITESPACE"
    CaseSensitiveInput    = "INPUT_CASE_SENSITIVE"
    ErrorOnDuplicateInput = "INPUT_ERROR_ON_DUPLICATE"
    MaskSecretsInput      = "INPUT_MASK_SECRETS"
    MaskPatternInput      = "INPUT_MASK_PATTERN"
    ToUpperInput          = "INPUT_TO_UPPER"
    ToLowerInput          = "INPUT_TO_LOWER"
    EncodeURLInput        = "INPUT_ENCODE_URL"
    EscapeNewlinesInput   = "INPUT_ESCAPE_NEWLINES"
    MaxLengthInput        = "INPUT_MAX_LENGTH"
    AllowEmptyInput       = "INPUT_ALLOW_EMPTY"
    DebugModeInput        = "DEBUG_MODE"

    // GitHub Environment Variables
    GithubEnvVar    = "GITHUB_ENV"
    GithubOutputVar = "GITHUB_OUTPUT"
)

// Default Values Constants
const (
    DefaultDelimiter        = ","
    DefaultFailOnEmpty      = true
    DefaultTrimWhitespace   = true
    DefaultCaseSensitive    = true
    DefaultErrorOnDuplicate = true
    DefaultMaskSecrets      = false
    DefaultMaskPattern      = ""
    DefaultToUpper          = false
    DefaultToLower          = false
    DefaultEncodeURL        = false
    DefaultEscapeNewlines   = true
    DefaultMaxLength        = 0
    DefaultAllowEmpty       = false
    DefaultDebugMode        = false
)

// Config holds the application configuration
type Config struct {
    // Input/Output Keys and Values
    EnvKeys      string
    EnvValues    string
    OutputKeys   string
    OutputValues string

    // GitHub File Paths
    GithubEnv    string
    GithubOutput string

    // Input Processing Options
    Delimiter        string
    FailOnEmpty      bool
    TrimWhitespace   bool
    CaseSensitive    bool
    ErrorOnDuplicate bool
    AllowEmpty       bool

    // Value Transformation Options
    ToUpper        bool
    ToLower        bool
    EncodeURL      bool
    EscapeNewlines bool
    MaxLength      int

    // Security Options
    MaskSecrets bool
    MaskPattern string

    // Debug Options
    DebugMode bool
}

// Load loads configuration from environment variables
func Load() *Config {
    return &Config{
        // Input/Output Keys and Values
        EnvKeys:      os.Getenv(EnvKeyInput),
        EnvValues:    os.Getenv(EnvValueInput),
        OutputKeys:   os.Getenv(OutputKeyInput),
        OutputValues: os.Getenv(OutputValueInput),

        // GitHub File Paths
        GithubEnv:    os.Getenv(GithubEnvVar),
        GithubOutput: os.Getenv(GithubOutputVar),

        // Input Processing Options
        Delimiter:        getEnvWithDefault(DelimiterInput, DefaultDelimiter),
        FailOnEmpty:      getBoolEnv(FailOnEmptyInput, DefaultFailOnEmpty),
        TrimWhitespace:   getBoolEnv(TrimWhitespaceInput, DefaultTrimWhitespace),
        CaseSensitive:    getBoolEnv(CaseSensitiveInput, DefaultCaseSensitive),
        ErrorOnDuplicate: getBoolEnv(ErrorOnDuplicateInput, DefaultErrorOnDuplicate),
        AllowEmpty:       getBoolEnv(AllowEmptyInput, DefaultAllowEmpty),

        // Value Transformation Options
        ToUpper:        getBoolEnv(ToUpperInput, DefaultToUpper),
        ToLower:        getBoolEnv(ToLowerInput, DefaultToLower),
        EncodeURL:      getBoolEnv(EncodeURLInput, DefaultEncodeURL),
        EscapeNewlines: getBoolEnv(EscapeNewlinesInput, DefaultEscapeNewlines),
        MaxLength:      getIntEnv(MaxLengthInput, DefaultMaxLength),

        // Security Options
        MaskSecrets: getBoolEnv(MaskSecretsInput, DefaultMaskSecrets),
        MaskPattern: getEnvWithDefault(MaskPatternInput, DefaultMaskPattern),

        // Debug Options
        DebugMode: getBoolEnv(DebugModeInput, DefaultDebugMode),
    }
}