import {
  useState,
  SyntheticEvent,
  Fragment,
  ChangeEvent,
  useEffect
} from 'react';
import { connect } from 'react-redux';

import ModalForm from '../../UI/Forms/ModalForm/ModalForm';
import InputGroup from '../../UI/Forms/InputGroup/InputGroup';
import {
  Bookmark,
  Category,
  GlobalState,
  NewBookmark,
  NewCategory,
  NewNotification
} from '../../../interfaces';
import { ContentType } from '../Bookmarks';
import {
  getCategories,
  addCategory,
  addBookmark,
  updateCategory,
  updateBookmark,
  createNotification
} from '../../../store/actions';
import Button from '../../UI/Buttons/Button/Button';
import classes from './BookmarkForm.module.css';

interface ComponentProps {
  modalHandler: () => void;
  contentType: ContentType;
  categories: Category[];
  category?: Category;
  bookmark?: Bookmark;
  addCategory: (formData: NewCategory) => void;
  addBookmark: (formData: NewBookmark | FormData) => void;
  updateCategory: (id: number, formData: NewCategory) => void;
  updateBookmark: (
    id: number,
    formData: NewBookmark | FormData,
    category: {
      prev: number;
      curr: number;
    }
  ) => void;
  createNotification: (notification: NewNotification) => void;
}

const BookmarkForm = (props: ComponentProps): JSX.Element => {
  const [useCustomIcon, toggleUseCustomIcon] = useState<boolean>(false);
  const [customIcon, setCustomIcon] = useState<File | null>(null);
  const [categoryName, setCategoryName] = useState<NewCategory>({
    name: ''
  });

  const [formData, setFormData] = useState<NewBookmark>({
    name: '',
    url: '',
    categoryId: -1,
    icon: ''
  });

  // Load category data if provided for editing
  useEffect(() => {
    if (props.category) {
      setCategoryName({ name: props.category.name });
    } else {
      setCategoryName({ name: '' });
    }
  }, [props.category]);

  // Load bookmark data if provided for editing
  useEffect(() => {
    if (props.bookmark) {
      setFormData({
        name: props.bookmark.name,
        url: props.bookmark.url,
        categoryId: props.bookmark.categoryId,
        icon: props.bookmark.icon
      });
    } else {
      setFormData({
        name: '',
        url: '',
        categoryId: -1,
        icon: ''
      });
    }
  }, [props.bookmark]);

  const formSubmitHandler = (e: SyntheticEvent<HTMLFormElement>): void => {
    e.preventDefault();

    const createFormData = (): FormData => {
      const data = new FormData();
      if (customIcon) {
        data.append('icon', customIcon);
      }
      data.append('name', formData.name);
      data.append('url', formData.url);
      data.append('categoryId', `${formData.categoryId}`);

      return data;
    };

    if (!props.category && !props.bookmark) {
      // Add new
      if (props.contentType === ContentType.category) {
        // Add category
        props.addCategory(categoryName);
        setCategoryName({ name: '' });
      } else if (props.contentType === ContentType.bookmark) {
        // Add bookmark
        if (formData.categoryId === -1) {
          props.createNotification({
            title: 'Error',
            message: 'Please select category'
          });
          return;
        }

        if (customIcon) {
          const data = createFormData();
          props.addBookmark(data);
        } else {
          props.addBookmark(formData);
        }

        setFormData({
          name: '',
          url: '',
          categoryId: formData.categoryId,
          icon: ''
        });

        setCustomIcon(null);
      }
    } else {
      // Update
      if (props.contentType === ContentType.category && props.category) {
        // Update category
        props.updateCategory(props.category.id, categoryName);
        setCategoryName({ name: '' });
      } else if (props.contentType === ContentType.bookmark && props.bookmark) {
        // Update bookmark
        if (customIcon) {
          const data = createFormData();
          props.updateBookmark(props.bookmark.id, data, {
            prev: props.bookmark.categoryId,
            curr: formData.categoryId
          });
        } else {
          props.updateBookmark(props.bookmark.id, formData, {
            prev: props.bookmark.categoryId,
            curr: formData.categoryId
          });
        }

        setFormData({
          name: '',
          url: '',
          categoryId: -1,
          icon: ''
        });

        setCustomIcon(null);
      }

      props.modalHandler();
    }
  };

  const inputChangeHandler = (e: ChangeEvent<HTMLInputElement>): void => {
    setFormData({
      ...formData,
      [e.target.name]: e.target.value
    });
  };

  const selectChangeHandler = (e: ChangeEvent<HTMLSelectElement>): void => {
    setFormData({
      ...formData,
      categoryId: parseInt(e.target.value)
    });
  };

  const fileChangeHandler = (e: ChangeEvent<HTMLInputElement>): void => {
    if (e.target.files) {
      setCustomIcon(e.target.files[0]);
    }
  };

  let button = <Button>Submit</Button>;

  if (!props.category && !props.bookmark) {
    if (props.contentType === ContentType.category) {
      button = <Button>Add new category</Button>;
    } else {
      button = <Button>Add new bookmark</Button>;
    }
  } else if (props.category) {
    button = <Button>Update category</Button>;
  } else if (props.bookmark) {
    button = <Button>Update bookmark</Button>;
  }

  return (
    <ModalForm
      modalHandler={props.modalHandler}
      formHandler={formSubmitHandler}
    >
      {props.contentType === ContentType.category ? (
        <Fragment>
          <InputGroup>
            <label htmlFor='categoryName'>Category Name</label>
            <input
              type='text'
              name='categoryName'
              id='categoryName'
              placeholder='Social Media'
              required
              value={categoryName.name}
              onChange={e => setCategoryName({ name: e.target.value })}
            />
          </InputGroup>
        </Fragment>
      ) : (
        <Fragment>
          <InputGroup>
            <label htmlFor='name'>Bookmark Name</label>
            <input
              type='text'
              name='name'
              id='name'
              placeholder='Reddit'
              required
              value={formData.name}
              onChange={e => inputChangeHandler(e)}
            />
          </InputGroup>
          <InputGroup>
            <label htmlFor='url'>Bookmark URL</label>
            <input
              type='text'
              name='url'
              id='url'
              placeholder='reddit.com'
              required
              value={formData.url}
              onChange={e => inputChangeHandler(e)}
            />
            <span>
              <a
                href='https://github.com/pawelmalak/flame#supported-url-formats-for-applications-and-bookmarks'
                target='_blank'
                rel='noreferrer'
              >
                {' '}
                Check supported URL formats
              </a>
            </span>
          </InputGroup>
          <InputGroup>
            <label htmlFor='categoryId'>Bookmark Category</label>
            <select
              name='categoryId'
              id='categoryId'
              required
              onChange={e => selectChangeHandler(e)}
              value={formData.categoryId}
            >
              <option value={-1}>Select category</option>
              {props.categories.map((category: Category): JSX.Element => {
                return (
                  <option key={category.id} value={category.id}>
                    {category.name}
                  </option>
                );
              })}
            </select>
          </InputGroup>
          {!useCustomIcon ? (
            // mdi
            <InputGroup>
              <label htmlFor='icon'>Bookmark Icon (optional)</label>
              <input
                type='text'
                name='icon'
                id='icon'
                placeholder='book-open-outline'
                value={formData.icon}
                onChange={e => inputChangeHandler(e)}
              />
              <span>
                Use icon name from MDI.
                <a href='https://materialdesignicons.com/' target='blank'>
                  {' '}
                  Click here for reference
                </a>
              </span>
              <span
                onClick={() => toggleUseCustomIcon(!useCustomIcon)}
                className={classes.Switch}
              >
                Switch to custom icon upload
              </span>
            </InputGroup>
          ) : (
            // custom
            <InputGroup>
              <label htmlFor='icon'>Bookmark Icon (optional)</label>
              <input
                type='file'
                name='icon'
                id='icon'
                onChange={e => fileChangeHandler(e)}
                accept='.jpg,.jpeg,.png,.svg'
              />
              <span
                onClick={() => toggleUseCustomIcon(!useCustomIcon)}
                className={classes.Switch}
              >
                Switch to MDI
              </span>
            </InputGroup>
          )}
        </Fragment>
      )}
      {button}
    </ModalForm>
  );
};

const mapStateToProps = (state: GlobalState) => {
  return {
    categories: state.bookmark.categories
  };
};

const dispatchMap = {
  getCategories,
  addCategory,
  addBookmark,
  updateCategory,
  updateBookmark,
  createNotification
};

export default connect(mapStateToProps, dispatchMap)(BookmarkForm);