import { orderBy } from "lodash";
import { FC, HTMLAttributes, useMemo, useState } from "react";

import { DiceContract, DiceUtils } from "@dndbeyond/character-rules-engine";

import { Button } from "~/components/Button";
import { useCharacterEngine } from "~/hooks/useCharacterEngine";

import { HpManageModal } from "../HpManageModal";
import styles from "./styles.module.css";

export interface HpSummaryProps extends HTMLAttributes<HTMLDivElement> {}

export const HpSummary: FC<HpSummaryProps> = ({ className, ...props }) => {
  const [isModalOpen, setIsModalOpen] = useState(false);
  const { hpInfo } = useCharacterEngine();

  const openModal = () => {
    setIsModalOpen(true);
  };

  const closeModal = () => {
    setIsModalOpen(false);
  };

  const hitDiceStrings = useMemo(() => {
    const hitDice = hpInfo.classesHitDice.map(
      (classHitDice) => classHitDice.dice
    );
    const combinedHitDice: Array<DiceContract> = [];
    hitDice.forEach((hitDie) => {
      const existingDieIdx = combinedHitDice.findIndex(
        (hitDice) => hitDice.diceValue === hitDie.diceValue
      );
      if (existingDieIdx > -1) {
        let existingDie = combinedHitDice[existingDieIdx];
        combinedHitDice[existingDieIdx] = {
          ...combinedHitDice[existingDieIdx],
          diceCount:
            (existingDie.diceCount !== null ? existingDie.diceCount : 0) +
            (hitDie.diceCount !== null ? hitDie.diceCount : 0),
        };
      } else {
        combinedHitDice.push(hitDie);
      }
    });

    return orderBy(combinedHitDice, ["diceValue"]).map((hitDie) =>
      DiceUtils.renderDie(hitDie)
    );
  }, [hpInfo]);

  return (
    <div {...props}>
      <div className={styles.hpSummaryContent}>
        <div>
          <p>
            <span className={styles.label}>Max Hit Points:</span>
            <span data-testid="hit-point-max">{hpInfo.totalHp}</span>
          </p>
          <p>
            <span className={styles.label}>Hit Dice:</span>
            <span data-testid="hit-point-dice">
              {hitDiceStrings.join(" + ")}
            </span>
          </p>
        </div>
        <Button
          className={styles.button}
          variant="builder"
          size="x-small"
          onClick={openModal}
        >
          Manage HP
        </Button>
      </div>
      <HpManageModal open={isModalOpen} onClose={closeModal} />
    </div>
  );
};