import React, { ReactNode, ComponentType } from "react";
import styles from "./OrganizedContent.module.css";

export interface LinkProps {
  children: string | ReactNode | (string | ReactNode)[];
  url: string;
}

type Link = ComponentType<LinkProps>;

interface Heading {
  name: string;
  url: string;
  content: ReactNode;
}

interface Props {
  headings: Heading[];
  currentIndex: number;
  link: Link;
  children: ReactNode;
}

interface ChildProps {
  headings: Heading[];
  currentIndex: number;
  link: Link;
}

export const OrganizedContent: React.FC<Props> = ({
  headings,
  currentIndex,
  children,
  link: Link,
}) => {
  const isReadAll = headings[currentIndex].name === "Read All";
  const isMobile = false;
  const readAllContent = headings
    .filter((heading: { name: string }) => heading.name !== "Read All")
    .map((heading) => (
      <div key={heading.url}>
        <h2 className={styles.contentHeading}>{heading.name}</h2>
        {heading.content}
      </div>
    ));

  if (isMobile) {
    return (
      <div>
        {isReadAll ? (
          <div>{readAllContent}</div>
        ) : (
          <h2 className={styles.contentHeading}>
            {headings[currentIndex].name}
          </h2>
        )}
        {children}
        <Footer headings={headings} currentIndex={currentIndex} link={Link} />
      </div>
    );
  } else {
    return (
      <div className={styles.organizedContent}>
        <Nav headings={headings} currentIndex={currentIndex} link={Link} />
        <div>
          {isReadAll ? (
            <div>{readAllContent}</div>
          ) : (
            <h2 className={styles.contentHeading}>
              {headings[currentIndex].name}
            </h2>
          )}
          {children}
          <Footer headings={headings} currentIndex={currentIndex} link={Link} />
        </div>
      </div>
    );
  }
};

const Nav: React.FC<ChildProps> = ({ headings, currentIndex, link: Link }) => {
  return (
    <div className={styles.nav}>
      {headings.map((heading, index) => (
        <div
          className={index === currentIndex ? styles.selectedHeadingArea : ""}
          key={heading.url}
        >
          <div
            className={
              styles.navOption +
              " " +
              (index === currentIndex
                ? styles.selectedHeading
                : heading.name === "Read All"
                ? styles.readAll
                : "")
            }
          >
            {index === currentIndex && (
              <span className={styles.selectedMarker} />
            )}
            <Link url={heading.url}>{heading.name}</Link>
          </div>
          <div className={styles.divider}></div>
        </div>
      ))}
    </div>
  );
};

const Footer: React.FC<ChildProps> = ({
  headings,
  currentIndex,
  link: Link,
}) => {
  const isReadAll = headings[currentIndex].name === "Read All";
  const prevHeading =
    currentIndex > 0 && headings[currentIndex - 1].name !== "Read All"
      ? headings[currentIndex - 1]
      : undefined;
  const nextHeading =
    currentIndex < headings.length - 1 && !isReadAll
      ? headings[currentIndex + 1]
      : undefined;

  return (
    <div className={styles.footer}>
      {prevHeading && (
        <div className={styles.clickable}>
          <Link url={prevHeading.url}>
            <div className={styles.footerSection}>
              <svg
                xmlns="http://www.w3.org/2000/svg"
                width="14"
                height="9"
                viewBox="0 0 14 9"
                className={styles.arrow + " " + styles.prevArrow}
              >
                <path d="M6.24407 8.12713C6.64284 8.58759 7.35716 8.58759 7.75593 8.12713L13.3613 1.65465C13.9221 1.00701 13.4621 0 12.6053 0H1.39467C0.537918 0 0.0778675 1.00701 0.638743 1.65465L6.24407 8.12713Z" />
              </svg>
              <div>
                <div className={styles.prevNext}>Previous</div>
                <div className={styles.arrowHeading}>{prevHeading.name}</div>
              </div>
            </div>
          </Link>
        </div>
      )}
      <div></div>
      {nextHeading && (
        <div className={styles.clickable}>
          <Link url={nextHeading.url}>
            <div className={styles.footerSection}>
              <div>
                <div className={styles.prevNext + " " + styles.nextText}>
                  Next
                </div>
                <div className={styles.arrowHeading}>{nextHeading.name}</div>
              </div>
              <svg
                xmlns="http://www.w3.org/2000/svg"
                width="14"
                height="9"
                viewBox="0 0 14 9"
                className={styles.arrow + " " + styles.nextArrow}
              >
                <path d="M6.24407 8.12713C6.64284 8.58759 7.35716 8.58759 7.75593 8.12713L13.3613 1.65465C13.9221 1.00701 13.4621 0 12.6053 0H1.39467C0.537918 0 0.0778675 1.00701 0.638743 1.65465L6.24407 8.12713Z" />
              </svg>
            </div>
          </Link>
        </div>
      )}
    </div>
  );
};