import {
  TopicName,
  TopicMessage,
  Topic,
  ClusterName,
  TopicDetails,
  TopicConfig,
  TopicFormData,
  TopicFormCustomParam,
  TopicFormFormattedParams,
  TopicFormCustomParams,
  TopicMessageQueryParams,
} from 'redux/interfaces';
import { BASE_URL, BASE_PARAMS } from 'lib/constants';

const formatCustomParams = (
  customParams: TopicFormCustomParams
): TopicFormFormattedParams => {
  return Object.values(customParams || {}).reduce(
    (result: TopicFormFormattedParams, customParam: TopicFormCustomParam) => {
      return {
        ...result,
        [customParam.name]: customParam.value,
      };
    },
    {} as TopicFormFormattedParams
  );
};

export const getTopicConfig = (
  clusterName: ClusterName,
  topicName: TopicName
): Promise<TopicConfig[]> =>
  fetch(`${BASE_URL}/clusters/${clusterName}/topics/${topicName}/config`, {
    ...BASE_PARAMS,
  }).then((res) => res.json());

export const getTopicDetails = (
  clusterName: ClusterName,
  topicName: TopicName
): Promise<TopicDetails> =>
  fetch(`${BASE_URL}/clusters/${clusterName}/topics/${topicName}`, {
    ...BASE_PARAMS,
  }).then((res) => res.json());

export const getTopics = (clusterName: ClusterName): Promise<Topic[]> =>
  fetch(`${BASE_URL}/clusters/${clusterName}/topics`, {
    ...BASE_PARAMS,
  }).then((res) => res.json());

export const getTopicMessages = (
  clusterName: ClusterName,
  topicName: TopicName,
  queryParams: Partial<TopicMessageQueryParams>
): Promise<TopicMessage[]> => {
  let searchParams = '';
  Object.entries({ ...queryParams }).forEach((entry) => {
    const key = entry[0];
    const value = entry[1];
    if (value) {
      if (Array.isArray(value)) {
        searchParams += value.map((v) => `${key}=${v}&`);
      } else {
        searchParams += `${key}=${value}&`;
      }
    }
  });
  return fetch(
    `${BASE_URL}/clusters/${clusterName}/topics/${topicName}/messages?${searchParams}`,
    {
      ...BASE_PARAMS,
    }
  ).then((res) => res.json());
};

export const postTopic = (
  clusterName: ClusterName,
  form: TopicFormData
): Promise<Topic> => {
  const {
    name,
    partitions,
    replicationFactor,
    cleanupPolicy,
    retentionBytes,
    retentionMs,
    maxMessageBytes,
    minInSyncReplicas,
  } = form;

  const body = JSON.stringify({
    name,
    partitions,
    replicationFactor,
    configs: {
      'cleanup.policy': cleanupPolicy,
      'retention.ms': retentionMs,
      'retention.bytes': retentionBytes,
      'max.message.bytes': maxMessageBytes,
      'min.insync.replicas': minInSyncReplicas,
      ...formatCustomParams(form.customParams),
    },
  });

  return fetch(`${BASE_URL}/clusters/${clusterName}/topics`, {
    ...BASE_PARAMS,
    method: 'POST',
    body,
  }).then((res) => res.json());
};

export const patchTopic = (
  clusterName: ClusterName,
  form: TopicFormData
): Promise<Topic> => {
  const {
    cleanupPolicy,
    retentionBytes,
    retentionMs,
    maxMessageBytes,
    minInSyncReplicas,
  } = form;

  const body = JSON.stringify({
    configs: {
      'cleanup.policy': cleanupPolicy,
      'retention.ms': retentionMs,
      'retention.bytes': retentionBytes,
      'max.message.bytes': maxMessageBytes,
      'min.insync.replicas': minInSyncReplicas,
      ...formatCustomParams(form.customParams),
    },
  });

  return fetch(`${BASE_URL}/clusters/${clusterName}/topics/${form.name}`, {
    ...BASE_PARAMS,
    method: 'PATCH',
    body,
  }).then((res) => res.json());
};