import React from 'react';

/** Título de página unificado para todo el Centro de Mando. */
export function PageHeader({
  eyebrow,
  title,
  description,
  actions,
}: {
  eyebrow?: string;
  title: string;
  description?: string;
  actions?: React.ReactNode;
}) {
  return (
    <div className="mb-6 md:mb-8 flex flex-col gap-4 sm:flex-row sm:items-end sm:justify-between">
      <div className="min-w-0 space-y-1.5">
        {eyebrow ? (
          <p className="text-[10px] font-semibold uppercase tracking-[0.16em] text-brand-600">
            {eyebrow}
          </p>
        ) : null}
        <h1 className="text-2xl md:text-3xl font-semibold tracking-tight text-gray-900 text-balance">
          {title}
        </h1>
        {description ? (
          <p className="text-sm text-gray-600 max-w-2xl leading-relaxed">
            {description}
          </p>
        ) : null}
      </div>
      {actions ? (
        <div className="flex flex-wrap items-center gap-2 shrink-0">{actions}</div>
      ) : null}
    </div>
  );
}

/** Superficie de contenido estándar. */
export function Surface({
  children,
  className = '',
  padded = true,
}: {
  children: React.ReactNode;
  className?: string;
  padded?: boolean;
}) {
  return (
    <div
      className={`rounded-2xl border border-gray-200 bg-white shadow-sm ${
        padded ? 'p-4 md:p-5' : ''
      } ${className}`}
    >
      {children}
    </div>
  );
}

export function SectionTitle({
  title,
  description,
}: {
  title: string;
  description?: string;
}) {
  return (
    <div className="mb-3">
      <h2 className="text-base font-semibold text-gray-900">{title}</h2>
      {description ? (
        <p className="text-xs text-gray-500 mt-0.5">{description}</p>
      ) : null}
    </div>
  );
}

export function EmptyState({
  title,
  description,
}: {
  title: string;
  description?: string;
}) {
  return (
    <div className="rounded-2xl border border-dashed border-gray-300 bg-gray-50 px-6 py-10 text-center">
      <p className="text-sm font-medium text-gray-800">{title}</p>
      {description ? (
        <p className="text-xs text-gray-600 mt-1.5 max-w-md mx-auto leading-relaxed">
          {description}
        </p>
      ) : null}
    </div>
  );
}

/** Selector de periodo / pestañas — contraste alto sobre fondo blanco. */
export function SegmentedControl<T extends string>({
  value,
  options,
  onChange,
  size = 'md',
}: {
  value: T;
  options: { id: T; label: string }[];
  onChange: (id: T) => void;
  size?: 'sm' | 'md';
}) {
  const pad = size === 'sm' ? 'px-2.5 py-1 text-xs' : 'px-3 py-1.5 text-sm';
  return (
    <div className="flex gap-1 rounded-lg border border-gray-200 p-0.5 bg-gray-100">
      {options.map((o) => (
        <button
          key={o.id}
          type="button"
          onClick={() => onChange(o.id)}
          className={`${pad} rounded-md font-semibold transition-colors ${
            value === o.id
              ? 'bg-brand-500 text-white shadow-sm'
              : 'text-gray-600 hover:text-gray-900 hover:bg-white'
          }`}
        >
          {o.label}
        </button>
      ))}
    </div>
  );
}