import * as React from 'react';
import { cn } from '@/lib/utils';
import { Textarea } from './textarea';
import { Label } from './label';

/**
 * LabeledTextarea - 带 label 和 error 的 Textarea 包装组件
 * 用于兼容现有表单（如 contact 表单）的 label/error API
 * 底层使用标准 shadcn/ui Textarea + Label
 */
export interface LabeledTextareaProps extends React.ComponentProps<'textarea'> {
  label?: React.ReactNode;
  error?: string;
  hint?: React.ReactNode;
  required?: boolean;
}

const LabeledTextarea = React.forwardRef<HTMLTextAreaElement, LabeledTextareaProps>(
  ({ label, error, hint, id, required, className, ...props }, ref) => {
    const generatedId = React.useId();
    const textareaId = id || generatedId;
    const errorId = `${textareaId}-error`;
    const hintId = `${textareaId}-hint`;

    return (
      <div className="w-full">
        {label && (
          <Label
            htmlFor={textareaId}
            className="block text-sm font-medium text-text-secondary mb-2"
          >
            {label}
            {required && (
              <span className="text-brand-ink ml-1.5" aria-hidden="true">*</span>
            )}
          </Label>
        )}
        <Textarea
          id={textareaId}
          ref={ref}
          className={cn(
            className,
            error && 'border-brand focus-visible:border-brand focus-visible:ring-brand/30'
          )}
          aria-required={required ? 'true' : undefined}
          aria-invalid={error ? 'true' : undefined}
          aria-describedby={cn(error && errorId, hint && hintId) || undefined}
          required={required}
          {...props}
        />
        {hint && !error && (
          <p id={hintId} className="mt-1.5 text-xs text-text-muted">
            {hint}
          </p>
        )}
        {error && (
          <p
            id={errorId}
            className="mt-1.5 text-sm text-brand-ink"
            role="alert"
            data-testid="error-message"
          >
            {error}
          </p>
        )}
      </div>
    );
  }
);
LabeledTextarea.displayName = 'LabeledTextarea';

export { LabeledTextarea };