// React
import {
  useState,
  SyntheticEvent,
  Fragment,
  ChangeEvent,
  useEffect,
} from 'react';

// Redux
import { useDispatch, useSelector } from 'react-redux';

// Typescript
import {
  Bookmark,
  Category,
  NewBookmark,
  NewCategory,
} from '../../../interfaces';
import { ContentType } from '../Bookmarks';

// UI
import { ModalForm, InputGroup, Button } from '../../UI';

// CSS
import classes from './BookmarkForm.module.css';
import { newBookmarkTemplate, newCategoryTemplate } from '../../../utility';
import { State } from '../../../store/reducers';
import { bindActionCreators } from 'redux';
import { actionCreators } from '../../../store';

interface Props {
  modalHandler: () => void;
  contentType: ContentType;
  category?: Category;
  bookmark?: Bookmark;
}

export const BookmarkForm = (props: Props): JSX.Element => {
  const { categories } = useSelector((state: State) => state.bookmarks);

  const dispatch = useDispatch();
  const {
    addCategory,
    addBookmark,
    updateCategory,
    updateBookmark,
    createNotification,
  } = bindActionCreators(actionCreators, dispatch);

  const [useCustomIcon, toggleUseCustomIcon] = useState<boolean>(false);
  const [customIcon, setCustomIcon] = useState<File | null>(null);
  const [categoryName, setCategoryName] =
    useState<NewCategory>(newCategoryTemplate);

  const [formData, setFormData] = useState<NewBookmark>(newBookmarkTemplate);

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

  // Load bookmark data if provided for editing
  useEffect(() => {
    if (props.bookmark) {
      setFormData({ ...props.bookmark });
    } else {
      setFormData(newBookmarkTemplate);
    }
  }, [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
        addCategory(categoryName);
        setCategoryName(newCategoryTemplate);
      } else if (props.contentType === ContentType.bookmark) {
        // Add bookmark
        if (formData.categoryId === -1) {
          createNotification({
            title: 'Error',
            message: 'Please select category',
          });
          return;
        }

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

        setFormData({
          ...newBookmarkTemplate,
          categoryId: formData.categoryId,
        });

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

        setFormData(newBookmarkTemplate);

        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, isPublic: !!!!!false })
              }
            />
          </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>
              {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={() => {
                  setCustomIcon(null);
                  toggleUseCustomIcon(!useCustomIcon);
                }}
                className={classes.Switch}
              >
                Switch to MDI
              </span>
            </InputGroup>
          )}
        </Fragment>
      )}
      {button}
    </ModalForm>
  );
};