import React, { useState } from "react";
import { getEnumKeyByEnumValue, QUESTION_TYPES } from "../commons";
import { getElementByQuestionType } from "../helpers";
import { IQuestionProps } from "../types";
import { useDrag, useDrop } from "react-dnd";
import { SurveyLayout } from "../layouts";
import { surveyApi } from "../apis";

const options = Object.entries(QUESTION_TYPES).map(([type, value]) => (
  <option key={type} value={value}>
    {value}
  </option>
));

export interface DropResult {
  name: string;
}
export const Question = ({
  element,
  handleQuestion,
  deleteQuestion,
}: IQuestionProps) => {
  const [question, setQuestion] = useState(element);
  const isEditing = question.isEditing;

  async function handleEditComplete() {
    question.content.choices.map((choice) => {
      if (choice.text.trim() === "") {
        alert("질문작성이 완료되지 않았습니다.");
        return (question.isEditing = true);
      } else {
        question.isEditing = false;
        console.log("editing completed:", question);
        handleQuestion(question);
      }
    });
  }

  function handleSelect(event: React.ChangeEvent<HTMLSelectElement>) {
    const selectedType = event.currentTarget.value;
    console.log(selectedType);

    const selectedKind =
      getEnumKeyByEnumValue(QUESTION_TYPES, selectedType) ?? "singletext";
    console.log("selected kind:", selectedKind);
    setQuestion({ ...question, type: selectedKind });
  }

  const handleElement = () => {
    console.log("handle element");
    setQuestion({ ...question });
  };

  function handleChange(event: React.ChangeEvent<HTMLInputElement>) {
    const { checked, name, value } = event.currentTarget;
    if (name === "isRequired") {
      return setQuestion({ ...question, [name]: checked });
    }
    setQuestion({ ...question, [name]: value });
  }

  const onCancel = () => {
    const originalQuestion = { ...element, isEditing: false };
    setQuestion(originalQuestion);
    handleQuestion(originalQuestion);
  };

  const onDelete = () => {
    if (window.confirm("질문을 삭제하시겠습니까?")) {
      deleteQuestion(question._id);
    }
  };

  const onEdit = () => {
    setQuestion({ ...question, isEditing: true });
    handleQuestion({ ...question, isEditing: true });
  };
  //

  const [{ isDragging }, drag] = useDrag(() => ({
    type: SurveyLayout.name,
    item: { name: question.type },
    end: (item, monitor) => {
      const dropResult = monitor.getDropResult<DropResult>();
      if (item && dropResult) {
        alert(`You dropped ${item.name}`);
      }
    },
    collect: (monitor) => ({
      isDragging: monitor.isDragging(),
      handlerId: monitor.getHandlerId(),
    }),
  }));

  const [{ canDrop, isOver }, drop] = useDrop(() => ({
    accept: SurveyLayout.name,
    collect: (monitor) => ({
      isOver: monitor.isOver(),
      canDrop: monitor.canDrop(),
    }),
    hover(item, monitor) {
      if (!isDragging) {
        return;
      }
    },
  }));

  //
  return (
    <div ref={drop} className="flex w-full h-full justify-center">
      <div
        ref={drag}
        style={{ borderColor: isEditing ? "red" : "#0A8A8A" }}
        className={
          "flex flex-col container w-full h-auto border-2 items-center m-3 py-2 rounded-lg cursor-move "
        }
      >
        <div className="flex h-16 w-full place-content-center items-center">
          <input
            type="text"
            name="title"
            id={question._id}
            className="text-xl font-bold border-b-2 w-11/12"
            placeholder={"Question Title"}
            value={question.title}
            onChange={handleChange}
            disabled={!isEditing}
          ></input>
        </div>
        <div className="flex w-full justify-center">
          <input
            type="text"
            name="comment"
            id={question._id}
            className="border w-11/12"
            placeholder="질문에 대한 설명을 입력해주세요"
            value={question.comment}
            onChange={handleChange}
            disabled={!isEditing}
          ></input>
        </div>
        {getElementByQuestionType(question, handleElement, isEditing)}
        <div className="flex flex-row place-content-between w-11/12 py-2">
          <select
            id={question._id}
            name="type"
            onChange={handleSelect}
            disabled={!isEditing}
            value={QUESTION_TYPES[question.type]}
            className="w-32 h-10 md:w-36 bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-themeColor"
          >
            {options}
          </select>
          <div className="place-self-end py-2">
            <input
              type="checkbox"
              id="isRequired"
              name="isRequired"
              onChange={handleChange}
              disabled={!isEditing}
              checked={question.isRequired}
            />
            <label htmlFor="isRequired" className="px-1">
              필수
            </label>
            {isEditing ? (
              <>
                <button type="button" className="px-1" onClick={onCancel}>
                  취소
                </button>

                <button
                  type="button"
                  className="px-1"
                  onClick={handleEditComplete}
                >
                  확인
                </button>
              </>
            ) : (
              <>
                <button type="button" className="px-1" onClick={onDelete}>
                  삭제
                </button>
                <button type="button" className="px-1" onClick={onEdit}>
                  수정
                </button>
              </>
            )}
          </div>
        </div>
      </div>
    </div>
  );
};