import React, { PropsWithChildren } from "react";

import Link from "@docusaurus/Link";
import useDocusaurusContext from "@docusaurus/useDocusaurusContext";
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import Logo from "@theme/Logo";

export function Hero(): JSX.Element {
  const { siteConfig } = useDocusaurusContext();

  return (
    <div className="flex flex-wrap p-16 mx-auto max-w-7xl h-screen relative px-4 sm:p-24">
      <div className="flex-grow self-center text-center">
        <Logo imageClassName="max-h-48" />
        <h1 className="text-5xl tracking-tight font-light sm:text-5xl md:text-5xl">
          <span className="text-hero">N</span>one
          <span className="text-hero">B</span>ot
        </h1>
        <p className="my-3 max-w-md mx-auto text-sm font-medium tracking-wide uppercase opacity-70 md:mt-5 md:max-w-3xl">
          {siteConfig.tagline}
        </p>
        <div className="mt-8">
          <Link
            to="/docs/guide"
            className="inline-block bg-hero text-white font-bold rounded-lg px-6 py-3"
          >
            开始使用
          </Link>
        </div>
      </div>
      <div className="absolute flex-grow flex items-center justify-between bottom-0 right-0 w-full">
        <div className="mx-auto self-start animate-bounce">
          <FontAwesomeIcon
            className="text-4xl text-hero"
            icon={["fas", "angle-down"]}
          />
        </div>
      </div>
    </div>
  );
}

export type Feature = {
  readonly title: string;
  readonly tagline?: string;
  readonly description?: string;
  readonly annotaion?: string;
};

export function HeroFeature(props: PropsWithChildren<Feature>): JSX.Element {
  const { title, tagline, description, annotaion, children } = props;

  return (
    <>
      <p className="mt-3 mb-3 max-w-md mx-auto text-sm font-medium tracking-wide uppercase opacity-70 md:mt-5 md:max-w-3xl">
        {tagline}
      </p>
      <h1 className="text-4xl tracking-tight font-light sm:text-5xl md:text-5xl text-hero">
        {title}
      </h1>
      <p className="mt-10 mb-6">{description}</p>
      {children}
      <p className="text-sm italic opacity-70">{annotaion}</p>
    </>
  );
}

export function HeroFeatureSingle(
  props: PropsWithChildren<Feature>
): JSX.Element {
  return (
    <div className="max-w-7xl mx-auto py-16 px-4 text-center md:px-16">
      <HeroFeature {...props} />
    </div>
  );
}

export function HeroFeatureDouble(
  props: PropsWithChildren<{ features: [Feature, Feature] }>
): JSX.Element {
  const {
    features: [feature1, feature2],
    children,
  } = props;

  let children1, children2;
  if (Array.isArray(children) && children.length === 2) {
    [children1, children2] = children;
  }

  return (
    <div className="max-w-7xl mx-auto py-16 px-4 md:grid md:grid-cols-2 md:gap-6 md:px-16">
      <div className="pb-16 text-center md:pb-0">
        <HeroFeature {...feature1} children={children1} />
      </div>
      <div className="text-center">
        <HeroFeature {...feature2} children={children2} />
      </div>
    </div>
  );
}