export interface BaseInputOptions {
    /** Optional heading displayed above the prompt. */
    title?: string;
    /** Hint displayed while the field is empty. */
    placeholder?: string;
    /** Reject an empty value when true. */
    required?: boolean;
    /** Label for the submit button. Defaults to the `rpg.input.confirm` translation. */
    confirmText?: string;
    /** Label for the cancellation button. Defaults to the `rpg.input.cancel` translation. */
    cancelText?: string;
    /** Display the cancellation button. Defaults to true. */
    cancelButton?: boolean;
}
/** Options for a single-line text, password, or email input. */
export interface TextInputOptions extends BaseInputOptions {
    control?: 'input';
    type?: 'text' | 'password' | 'email';
    defaultValue?: string;
    minLength?: number;
    maxLength?: number;
}
/** Options for a single-line numeric input that resolves to a number. */
export interface NumberInputOptions extends BaseInputOptions {
    control?: 'input';
    type: 'number';
    defaultValue?: number;
    min?: number;
    max?: number;
    step?: number;
}
/** Options for a multiline text field that resolves to a string. */
export interface TextareaInputOptions extends BaseInputOptions {
    control: 'textarea';
    type?: 'text';
    defaultValue?: string;
    minLength?: number;
    maxLength?: number;
    rows?: number;
}
export type InputOptions = TextInputOptions | NumberInputOptions | TextareaInputOptions;
export type InputResult<T extends InputOptions> = T extends NumberInputOptions ? number | null : string | null;
export type InputFormData = BaseInputOptions & {
    message: string;
    control: 'input' | 'textarea';
    type: 'text' | 'password' | 'email' | 'number';
    defaultValue: string | number;
    required: boolean;
    errorKey?: string;
    errorParams?: Record<string, string | number>;
    minLength?: number;
    maxLength?: number;
    min?: number;
    max?: number;
    step?: number;
    rows?: number;
};
export type InputValidationResult = {
    value: string | number | null;
} | {
    errorKey: string;
    errorParams?: Record<string, string | number>;
};
export declare class InputFormController {
    data: InputFormData;
    constructor(message: string, options?: InputOptions);
    validate(rawValue: unknown): InputValidationResult;
    applyError(result: Exclude<InputValidationResult, {
        value: string | number | null;
    }>): InputFormData;
}