import {
  faChevronDown,
  faChevronUp,
  faClock,
} from "@fortawesome/free-solid-svg-icons";
import React, { useState } from "react";
import { Button, ButtonGroup, InputGroup, Form } from "react-bootstrap";
import { Icon } from "./Icon";
import TextUtils from "src/utils/text";

interface IProps {
  disabled?: boolean;
  value: number | null | undefined;
  setValue(value: number | null): void;
  onReset?(): void;
  className?: string;
  placeholder?: string;
  error?: string;
  allowNegative?: boolean;
}

export const DurationInput: React.FC<IProps> = ({
  disabled,
  value,
  setValue,
  onReset,
  className,
  placeholder,
  error,
  allowNegative = false,
}) => {
  const [tmpValue, setTmpValue] = useState<string>();

  function onChange(e: React.ChangeEvent<HTMLInputElement>) {
    setTmpValue(e.currentTarget.value);
  }

  function onBlur() {
    if (tmpValue !== undefined) {
      updateValue(TextUtils.timestampToSeconds(tmpValue));
      setTmpValue(undefined);
    }
  }

  function updateValue(v: number | null) {
    if (v !== null && !allowNegative && v < 0) {
      v = null;
    }
    setValue(v);
  }

  function increment() {
    setTmpValue(undefined);
    updateValue((value ?? 0) + 1);
  }

  function decrement() {
    setTmpValue(undefined);
    if (allowNegative) {
      updateValue((value ?? 0) - 1);
    } else {
      updateValue(value ? value - 1 : 0);
    }
  }

  function renderButtons() {
    if (!disabled) {
      return (
        <ButtonGroup vertical>
          <Button
            variant="secondary"
            className="duration-button"
            onClick={() => increment()}
          >
            <Icon icon={faChevronUp} />
          </Button>
          <Button
            variant="secondary"
            className="duration-button"
            onClick={() => decrement()}
          >
            <Icon icon={faChevronDown} />
          </Button>
        </ButtonGroup>
      );
    }
  }

  function maybeRenderReset() {
    if (onReset) {
      return (
        <Button variant="secondary" onClick={() => onReset()}>
          <Icon icon={faClock} />
        </Button>
      );
    }
  }

  let inputValue = "";
  if (tmpValue !== undefined) {
    inputValue = tmpValue;
  } else if (value !== null && value !== undefined) {
    inputValue = TextUtils.secondsToTimestamp(value);
  }

  if (placeholder) {
    placeholder = `${placeholder} (hh:mm:ss)`;
  } else {
    placeholder = "hh:mm:ss";
  }

  return (
    <div className={`duration-input ${className}`}>
      <InputGroup>
        <Form.Control
          className="duration-control text-input"
          disabled={disabled}
          value={inputValue}
          onChange={onChange}
          onBlur={onBlur}
          placeholder={placeholder}
        />
        <InputGroup.Append>
          {maybeRenderReset()}
          {renderButtons()}
        </InputGroup.Append>
        <Form.Control.Feedback type="invalid">{error}</Form.Control.Feedback>
      </InputGroup>
    </div>
  );
};