import { apiFetch, setStateError } from "../utils.js";
import { killQuery, query } from "../lib/state.js";

export const getTopics = async cluster =>
  (await apiFetch(`/topics/${cluster}`) || []).sort()

export const mapFromLocalStorage = ({ checked, querySettings, jsonDisplay, clusterNames, topics }) => {
  if (localStorage.querySettings) {
    let storedSettings
    try {
      storedSettings = JSON.parse(localStorage.querySettings)
    } catch (e) {
      storedSettings = {}
    }

    querySettings.maxItems = storedSettings?.maxItems ?? querySettings.maxItems
    querySettings.jsFilter = storedSettings?.jsFilter ?? querySettings.jsFilter
    querySettings.queryCode = storedSettings?.queryCode ?? querySettings.queryCode
    querySettings.mode = storedSettings?.mode ?? querySettings.mode

    if (!checked || clusterNames.includes(storedSettings?.cluster)) {
      querySettings.cluster = storedSettings.cluster
    } else {
      querySettings.cluster = clusterNames[0]
    }

    if (!checked || topics.includes(storedSettings?.topic)) {
      querySettings.topic = storedSettings.topic
    } else {
      querySettings.topic = topics[0]
    }
  }

  if (localStorage.jsonDisplay) {
    try {
      const savedJsonDisplay = JSON.parse(localStorage.jsonDisplay)
      Object.entries(savedJsonDisplay).forEach(([key, value]) => {
        if (savedJsonDisplay[key] !== undefined) {
          jsonDisplay[key] = value
        }
      })
    } catch (e) {
    }
  }
}

export const getClusterNames = async () => Object.keys((await apiFetch('/clusters')) || {})

export const startQuery = querySettings => {
  localStorage.setItem('querySettings', JSON.stringify(querySettings))
  query(querySettings).catch(setStateError)
  return querySettings.mode
}

export const stopQuery = querySettings => {
  killQuery(querySettings).catch(setStateError)
  return false
}
export const defaultQueryCode =
`// \`message\` contains all metadata
// \`value\` is shorthand for message.value
//    it contains the actual produced data
// \`json\` is a JSON representation of \`message\`

return message.value.eventType === "Television";`