import { ImagePlus } from 'lucide-react';
import type {
  ButtonHTMLAttributes,
  LabelHTMLAttributes,
  ReactNode,
} from 'react';

type PlatformUploadTileBaseProps = {
  label: ReactNode;
  hint?: ReactNode;
  icon?: ReactNode;
  disabled?: boolean;
  showLabel?: boolean;
  size?: 'square' | 'compact' | 'panel';
  surface?: 'platform' | 'editorDark';
};

type PlatformUploadTileButtonProps = Omit<
  ButtonHTMLAttributes<HTMLButtonElement>,
  'children' | 'disabled'
> &
  PlatformUploadTileBaseProps & {
    asChild?: false;
  };

type PlatformUploadTileLabelProps = Omit<
  LabelHTMLAttributes<HTMLLabelElement>,
  'children'
> &
  PlatformUploadTileBaseProps & {
    asChild: 'label';
  };

type PlatformUploadTileProps =
  | PlatformUploadTileButtonProps
  | PlatformUploadTileLabelProps;

function getPlatformUploadTileClassName(
  size: 'square' | 'compact' | 'panel',
  surface: 'platform' | 'editorDark',
  className?: string,
  disabled?: boolean,
) {
  const surfaceClassName = {
    platform:
      'border-[var(--platform-subpanel-border)] bg-[var(--platform-input-fill)] text-[var(--platform-text-soft)] hover:border-[var(--platform-surface-hover-border)] hover:text-[var(--platform-text-strong)]',
    editorDark:
      'border-white/12 bg-black/20 text-zinc-300 hover:border-sky-300/45 hover:bg-white/8 hover:text-white',
  }[surface];
  const sizeClassName = {
    square: 'h-[5.75rem] w-[5.75rem] items-center text-center',
    compact: 'h-12 w-full items-center text-center',
    panel: 'min-h-[7rem] w-full items-start px-4 py-4 text-left',
  }[size];

  return [
    'flex flex-col justify-center rounded-xl border border-dashed transition',
    surfaceClassName,
    sizeClassName,
    disabled ? 'cursor-not-allowed opacity-55' : 'cursor-pointer',
    className,
  ]
    .filter(Boolean)
    .join(' ');
}

/**
 * 平台通用上传方块。
 * 统一承载图片 / 附件上传入口的虚线方块、图标、主副文案和可访问语义。
 */
export function PlatformUploadTile({
  label,
  hint,
  icon = <ImagePlus className="h-6 w-6" />,
  disabled = false,
  showLabel = true,
  size = 'square',
  surface = 'platform',
  className,
  asChild,
  ...actionProps
}: PlatformUploadTileProps) {
  const tileClassName = getPlatformUploadTileClassName(
    size,
    surface,
    className,
    disabled,
  );
  const hasIcon = Boolean(icon);
  const labelClassName =
    size === 'panel'
      ? [hasIcon ? 'mt-2' : null, 'text-[11px] font-bold tracking-[0.14em]']
          .filter(Boolean)
          .join(' ')
      : [hasIcon ? 'mt-2' : null, 'text-xs font-medium']
          .filter(Boolean)
          .join(' ');
  const hintClassName =
    size === 'panel'
      ? 'mt-2 text-xs leading-5 opacity-80'
      : 'mt-0.5 text-[11px] opacity-80';

  const content = (
    <>
      {hasIcon ? icon : null}
      <span className={showLabel ? labelClassName : 'sr-only'}>{label}</span>
      {hint ? <span className={hintClassName}>{hint}</span> : null}
    </>
  );

  if (asChild === 'label') {
    const { onClick, ...labelProps } =
      actionProps as LabelHTMLAttributes<HTMLLabelElement>;

    return (
      <label
        {...labelProps}
        onClick={(event) => {
          if (disabled) {
            event.preventDefault();
            return;
          }
          onClick?.(event);
        }}
        aria-disabled={disabled || undefined}
        className={tileClassName}
      >
        {content}
      </label>
    );
  }

  const { type = 'button', ...buttonProps } =
    actionProps as ButtonHTMLAttributes<HTMLButtonElement>;

  return (
    <button
      {...buttonProps}
      type={type}
      disabled={disabled}
      className={tileClassName}
    >
      {content}
    </button>
  );
}