"use client"

import { useSession } from "next-auth/react"
import { startTransition, useEffect, useRef, useState } from "react"

import { useSessionId } from "@scandic-hotels/common/hooks/useSessionId"
import useRouterTransitionStore from "@scandic-hotels/common/stores/router-transition"
import { isValidSession } from "@scandic-hotels/trpc/utils/session"

import { createSDKPageObject, trackPageView } from "./pageview"

import type { TrackingSDKPageData } from "./types"

type TrackingSDKProps = {
  pageData: TrackingSDKPageData
  pathName: string
}

enum TransitionStatusEnum {
  NotRun = "NotRun",
  Running = "Running",
  Done = "Done",
}

type TransitionStatus = keyof typeof TransitionStatusEnum

export const useTrackSoftNavigationBasic = ({
  pageData,
  pathName,
}: TrackingSDKProps) => {
  const [status, setStatus] = useState<TransitionStatus>(
    TransitionStatusEnum.NotRun
  )

  const sessionId = useSessionId()
  const { data: session } = useSession()
  const validSession = isValidSession(session)
  const { isTransitioning, stopRouterTransition } = useRouterTransitionStore()

  const previousPathname = useRef<string | null>(null)

  useEffect(() => {
    if (isTransitioning && status === TransitionStatusEnum.NotRun) {
      startTransition(() => {
        setStatus(TransitionStatusEnum.Running)
      })
      return
    }

    if (isTransitioning && status === TransitionStatusEnum.Running) {
      setStatus(TransitionStatusEnum.Done)
      stopRouterTransition()
      return
    }

    if (!isTransitioning && status === TransitionStatusEnum.Done) {
      const trackingData = {
        ...pageData,
        sessionId,
        pathName,
      }
      const pageObject = createSDKPageObject(trackingData)

      trackPageView({
        event: "pageViewBasic",
        pageInfo: pageObject,
        userInfo: {
          loginStatus: validSession ? "logged in" : "Non-logged in",
        },
      })

      setStatus(TransitionStatusEnum.NotRun) // Reset status
      previousPathname.current = pathName // Update for next render
    }
  }, [
    isTransitioning,
    status,
    stopRouterTransition,
    pageData,
    pathName,
    sessionId,
  ])
}