import React, { Fragment } from 'react';
import { compose, graphql } from 'react-apollo';
import ReduxForm from 'declarative-redux-form';
import { change } from 'redux-form';
import { connect } from 'react-redux';
import { set } from 'react-redux-values';
import { Margin } from 'styled-components-spacing';
import includes from 'lodash.includes';
import sortBy from 'lodash.sortby';
import findIndex from 'lodash.findindex';
import groupBy from 'lodash.groupby';
import values from 'lodash.values';
import reverse from 'lodash.reverse';
import flatten from 'lodash.flatten';
import find from 'lodash.find';
import get from 'lodash.get';

import { InstanceTypeIcon, StatusLoader, Button } from 'joyent-ui-toolkit';

import Image, { Preview, ImageType } from '@components/create-instance/image';
import Title from '@components/create-instance/title';
import Description from '@components/description';
import imageData from '@data/images-map.json';
import GetImages from '@graphql/get-images.gql';
import { Forms, Values } from '@root/constants';

const { IC_IMG_F } = Forms;
const { IC_IMG_V_PROCEEDED, IC_IMG_V_VMS } = Values;

const HarcodedImage = (image = {}) => (
  <Fragment>
    <Title icon={<InstanceTypeIcon />} collapsed={true}>
      Instance type and image
    </Title>
    {image.id ? (
      <ReduxForm
        form={IC_IMG_F}
        destroyOnUnmount={false}
        forceUnregisterOnUnmount={true}
        initialValues={{ image: image.id }}
      >
        {props => (
          <Margin bottom={7}>
            <Preview {...image} />
          </Margin>
        )}
      </ReduxForm>
    ) : null}
  </Fragment>
);

const ImageContainer = ({
  expanded,
  proceeded,
  hardcoded,
  image = {},
  handleNext,
  handleEdit,
  handleSelectLatest,
  setImageType,
  loading,
  images,
  vms,
  step
}) =>
  hardcoded ? (
    <Fragment>
      <HarcodedImage {...image} />
    </Fragment>
  ) : (
    <Fragment>
      <Title
        id={step}
        onClick={!expanded && !proceeded && handleEdit}
        collapsed={!expanded && !proceeded}
        icon={<InstanceTypeIcon />}
      >
        Instance type and image
      </Title>
      {expanded ? (
        <Description>
          Hardware virtual machines are generally used for non-containerized
          applications. Infrastructure containers are generally for running any
          Linux image on secure, bare metal containers.{' '}
          <a
            href="https://docs.joyent.com/private-cloud/images"
            rel="noopener noreferrer"
            target="_blank"
          >
            Read the docs
          </a>
        </Description>
      ) : null}
      <ReduxForm
        form={IC_IMG_F}
        destroyOnUnmount={false}
        forceUnregisterOnUnmount={true}
        initialValues={{ vms: true }}
      >
        {props =>
          loading && expanded ? (
            <StatusLoader />
          ) : expanded ? (
            <Fragment>
              <ImageType setImageType={setImageType} vms={vms} />
              <Image
                {...props}
                images={images.filter(i => i.isVm === vms)}
                onSelectLatest={handleSelectLatest}
              />
            </Fragment>
          ) : image.id ? (
            <Preview {...image} />
          ) : null
        }
      </ReduxForm>
      {expanded ? (
        <Margin top={1} bottom={7}>
          <Button
            type="button"
            onClick={handleNext}
            disabled={!image.id || vms !== image.isVm}
          >
            Next
          </Button>
        </Margin>
      ) : proceeded ? (
        <Margin top={4} bottom={7}>
          <Button type="button" onClick={handleEdit} secondary>
            Edit
          </Button>
        </Margin>
      ) : null}
    </Fragment>
  );

export default compose(
  connect(
    ({ form, values }, ownProps) => {
      const proceeded = get(values, IC_IMG_V_PROCEEDED, false);
      const image = get(form, `${IC_IMG_F}.values.image`, null);
      const vms = get(values, IC_IMG_V_VMS, true);

      return {
        ...ownProps,
        proceeded: proceeded || image,
        vms,
        image
      };
    },
    (dispatch, { history }) => ({
      handleNext: () => {
        dispatch(set({ name: IC_IMG_V_PROCEEDED, value: true }));
        return history.push(
          `/instances/~create/package${history.location.search}`
        );
      },
      handleEdit: () => {
        return history.push(
          `/instances/~create/image${history.location.search}`
        );
      },
      handleSelectLatest: ({ versions }) => {
        return dispatch(change(IC_IMG_F, 'image', versions[0].id));
      },
      setImageType: isVm => {
        return dispatch(set({ name: IC_IMG_V_VMS, value: isVm }));
      }
    })
  ),
  graphql(GetImages, {
    options: ({ query }) => ({
      ssr: false,
      variables: { public: !query.image }
    }),
    props: ({ ownProps, data }) => {
      const { image = '', query } = ownProps;
      const { loading = false, images = [] } = data;

      if (query.image) {
        return {
          loading,
          image: find(images, ['id', query.image], {}),
          hardcoded: true
        };
      }

      const _images = images
        .reduce((acc, img) => {
          const isVm = !includes(img.type, 'DATASET');

          const imageName =
            imageData[
              img.name
                .split('-')[0]
                .split(' ')[0]
                .toLowerCase()
            ];

          const exists = Boolean(find(acc, { imageName, isVm }));

          const version = {
            name: img.name,
            version: img.version,
            published: new Date(img.published_at).getTime(),
            id: img.id
          };

          if (!exists) {
            return acc.concat([
              {
                isVm,
                imageName,
                versions: [version]
              }
            ]);
          }

          const index = findIndex(acc, {
            imageName,
            isVm
          });

          const versions = acc[index].versions.concat([version]);

          acc[index] = {
            ...acc[index],
            versions
          };

          return acc;
        }, [])
        .map(({ versions, ...img }) => {
          return {
            ...img,
            active: Boolean(find(versions, ['id', image])),
            versions: reverse(
              flatten(
                values(groupBy(versions, 'name')).map(groupedVersion =>
                  sortBy(groupedVersion, 'published').pop()
                )
              )
            )
          };
        });

      const selected = find(images, ['id', image]) || {};

      return {
        loading,
        images: _images,
        image: {
          ...selected,
          isVm: !includes(selected.type || '', 'DATASET')
        }
      };
    }
  })
)(ImageContainer);