import React, { createContext } from 'react'
import { sanitise } from '~/functions/path'
import { smarts } from '~/smarts'

export interface ThingtimeContextInterface {
  thingtime: any
  setThingtime: any
}

export const ThingtimeContext = createContext<ThingtimeContextInterface | null>(
  null
)

try {
  window.smarts = smarts
} catch (err) {
  // nothing
}

const initialThingtime = {
  nav: {},
  version: 4
}

const userData = {
  settings: {
    showCommander: true,
    clearCommanderOnToggle: true,
    clearCommanderContextOnToggle: true
  },
  'Bottom Content': {
    Content: "Edit this to your heart's desire"
  }
}

export const ThingtimeProvider = (props: any): JSX.Element => {
  const [thingtime, set] = React.useState({
    ...initialThingtime,
    ...userData
  })

  const thingtimeRef = React.useRef(thingtime)

  // get thingtime from localstorage
  React.useEffect(() => {
    try {
      const thingtimeFromLocalStorage = window.localStorage.getItem('thingtime')

      if (thingtimeFromLocalStorage) {
        const parsed = JSON.parse(thingtimeFromLocalStorage)
        if (parsed) {
          const invalidLocalStorage =
            !parsed.version || parsed.version < initialThingtime.version
          if (!invalidLocalStorage) {
            set(parsed)
          } else {
            const newThingtime = {
              ...parsed,
              ...initialThingtime
            }
            set(newThingtime)
          }
        }
      }
    } catch (err) {
      console.error('There was an error getting thingtime from localStorage')
    }
  }, [])

  React.useEffect(() => {
    thingtimeRef.current = thingtime

    try {
      window.localStorage.setItem('thingtime', JSON.stringify(thingtime))
    } catch (err) {
      console.error('There was an error saving thingtime to localStorage')
    }
  }, [thingtime])

  const setThingtime = React.useCallback(
    (path, value) => {
      const prevThingtime = thingtime

      const newThingtime = {
        ...prevThingtime
      }

      // check if first characters of path starts with thingtime or tt and strip from path

      path = sanitise(path)

      smarts.setsmart(newThingtime, path, value)

      // subtract last path part from dot delimitted path
      // prop1.prop2.prop3 => prop1.prop2
      const pathParts = path.split('.')
      pathParts.pop()
      const parentPath = pathParts.join('.')

      if (parentPath?.length) {
        const parent = smarts.getsmart(newThingtime, parentPath)

        const newParent = Array.isArray(parent) ? [...parent] : { ...parent }

        smarts.setsmart(newThingtime, parentPath, newParent)
      }

      set(newThingtime)
    },
    [thingtime]
  )

  const getThingtime = React.useCallback(
    (...args) => {
      const path = args[0]
      if (path === 'thingtime' || path === 'tt' || path === '.' || !path) {
        return thingtime
      }
      return smarts.getsmart(thingtime, path)
    },
    [thingtime]
  )

  React.useEffect(() => {
    try {
      window.setThingtime = setThingtime
      window.thingtime = thingtime
    } catch {
      // nothing
    }

    const keyListener = e => {}

    window.addEventListener('keydown', keyListener)

    return () => {
      window.removeEventListener('keydown', keyListener)
    }
  }, [setThingtime, thingtime])

  const value = {
    thingtime,
    setThingtime,
    getThingtime,
    thingtimeRef
  }

  return (
    <ThingtimeContext.Provider value={value}>
      {props?.children}
    </ThingtimeContext.Provider>
  )
}