import React, { useState, useEffect } from "react";

interface Step {
  step_number: number;
  instruction: string;
}

interface AddBulkStepsProps {
  steps: Step[];
  onChange?: (steps: Step[]) => void;
}

const AddBulkSteps: React.FC<AddBulkStepsProps> = ({ steps, onChange }) => {
  const [textValue, setTextValue] = useState<string>("");

  useEffect(() => {
    const textRepresentation = steps
      .map((step) => `${step.instruction}`)
      .join("\n");
    setTextValue(textRepresentation);
  }, [steps]);

  const handleInputChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
    setTextValue(e.target.value);
  };

  const parseAndUpdate = (value: string) => {
    const lines = value.split("\n").filter((line) => line.trim() !== "");

    const parsedSteps: Step[] = lines.map((line, idx) => {
      return { step_number: idx + 1, instruction: line };
    });

    if (onChange) onChange(parsedSteps);
  };

  const handleKeyDown = (e: React.KeyboardEvent<HTMLTextAreaElement>) => {
    if (e.key === "Enter") {
      parseAndUpdate(textValue);
    }
  };

  const handleBlur = () => {
    parseAndUpdate(textValue);
    document.body.style.overflow = "";
  };

  const manageOverflow = () => {
    const lineCount = textValue
      .split("\n")
      .filter((line) => line.trim() !== "").length;
    if (lineCount > 8) {
      document.body.style.overflow = "hidden";
    } else {
      document.body.style.overflow = "";
    }
  };

  const handleFocus = () => {
    manageOverflow();
  };

  const handleTouchEnd = () => {
    manageOverflow();
  };

  return (
    <div>
      <h3 className="text-xl font-bold text-[var(--color-secondaryTextDark)]">
        Steps:
      </h3>
      <textarea
        rows={8}
        value={textValue}
        onChange={handleInputChange}
        onKeyDown={handleKeyDown}
        onBlur={handleBlur}
        onFocus={handleFocus}
        onTouchEnd={handleTouchEnd}
        placeholder="Enter steps separated by new line"
        className="mb-4 p-2 border border-[var(--color-primaryBorder)] rounded w-full"
      />
    </div>
  );
};

export default AddBulkSteps;