"use client";

import React, { useEffect, useMemo, useRef, useState } from "react"
import { useAppSelector } from "@/common"
import { TrulienceAvatar } from "trulience-sdk"
import { IMicrophoneAudioTrack } from "agora-rtc-sdk-ng"
import { Maximize, Minimize } from "lucide-react";
import { cn } from "@/lib/utils";
import { toast } from "sonner";
import { Progress, ProgressIndicator } from "../ui/progress";

interface AvatarProps {
  audioTrack?: IMicrophoneAudioTrack,
  localAudioTrack?: IMicrophoneAudioTrack
}

export default function Avatar({ audioTrack }: AvatarProps) {
  const agentConnected = useAppSelector((state) => state.global.agentConnected)
  const trulienceSettings = useAppSelector((state) => state.global.trulienceSettings)
  const trulienceAvatarRef = useRef<TrulienceAvatar>(null)
  const [errorMessage, setErrorMessage] = useState<string>("")

  // Track loading progress
  const [loadProgress, setLoadProgress] = useState(0)

  // State for the final avatar ID
  const [finalAvatarId, setFinalAvatarId] = useState("")

  // State for toggling fullscreen
  const [fullscreen, setFullscreen] = useState(false)

  // Safely read URL param on the client
  useEffect(() => {
    if (typeof window !== "undefined") {
      const urlParams = new URLSearchParams(window.location.search)
      const avatarIdFromURL = urlParams.get("avatarId")
      setFinalAvatarId(
        avatarIdFromURL || trulienceSettings.avatarId || ""
      )
    }
  }, [])

  // Define event callbacks
  const eventCallbacks = useMemo(() => {
    return {
      "auth-success": (resp: string) => {
        console.log("Trulience Avatar auth-success:", resp)
      },
      "auth-fail": (resp: any) => {
        console.log("Trulience Avatar auth-fail:", resp)
        setErrorMessage(resp.message)
      },
      "websocket-connect": (resp: string) => {
        console.log("Trulience Avatar websocket-connect:", resp)
      },
      "load-progress": (details: Record<string, any>) => {
        console.log("Trulience Avatar load-progress:", details.progress)
        setLoadProgress(details.progress)
      },
    }
  }, [])

  // Only create TrulienceAvatar instance once we have a final avatar ID
  const trulienceAvatarInstance = useMemo(() => {
    if (!finalAvatarId) return null
    return (
      <TrulienceAvatar
        url={trulienceSettings.trulienceSDK}
        ref={trulienceAvatarRef}
        avatarId={finalAvatarId}
        token={trulienceSettings.avatarToken}
        eventCallbacks={eventCallbacks}
        width="100%"
        height="100%"
      />
    )
  }, [finalAvatarId, eventCallbacks])

  // Update the Avatar’s audio stream whenever audioTrack or agentConnected changes
  useEffect(() => {
    if (trulienceAvatarRef.current) {
      if (audioTrack && agentConnected) {
        const stream = new MediaStream([audioTrack.getMediaStreamTrack()])
        trulienceAvatarRef.current.setMediaStream(null)
        trulienceAvatarRef.current.setMediaStream(stream)
        console.warn("[TrulienceAvatar] MediaStream set:", stream)
      } else if (!agentConnected) {
        const trulienceObj = trulienceAvatarRef.current.getTrulienceObject()
        trulienceObj?.sendMessageToAvatar("<trl-stop-background-audio immediate='true' />")
        trulienceObj?.sendMessageToAvatar("<trl-content position='DefaultCenter' />")
      }
    }

    // Cleanup: unset media stream
    return () => {
      trulienceAvatarRef.current?.setMediaStream(null)
    }
  }, [audioTrack, agentConnected])

  return (
    <div className={cn("relative h-full w-full overflow-hidden rounded-lg", {
      ["absolute top-0 left-0 h-screen w-screen rounded-none"]: fullscreen
    })}>
      <button
        className="absolute z-10 top-2 right-2 bg-black/50 p-2 rounded-lg hover:bg-black/70 transition"
        onClick={() => setFullscreen(prevValue => !prevValue)}
      >
        {fullscreen ? <Minimize className="text-white" size={24} /> : <Maximize className="text-white" size={24} />}
      </button>

      {/* Render the TrulienceAvatar */}
      {trulienceAvatarInstance}

      {/* Show a loader overlay while progress < 1 */}
      {errorMessage ? (
        <div className="absolute inset-0 z-10 flex items-center justify-center bg-red-500 bg-opacity-80 text-white">
          <div>{errorMessage}</div>
        </div>
      ) : loadProgress < 1 && (
        <div className="absolute inset-0 z-10 flex items-center justify-center bg-black bg-opacity-80">
          {/* Simple Tailwind spinner */}
          <Progress
            className="relative h-[15px] w-[200px] overflow-hidden rounded-full bg-blackA6"
            style={{
              // Fix overflow clipping in Safari
              // https://gist.github.com/domske/b66047671c780a238b51c51ffde8d3a0
              transform: "translateZ(0)",
            }}
            value={loadProgress*100}
          >
            <ProgressIndicator
              className="ease-[cubic-bezier(0.65, 0, 0.35, 1)] size-full bg-white transition-transform duration-[660ms]"
              style={{ transform: `translateX(-${100 - loadProgress*100}%)` }}
            />
          </Progress>
        </div>
      )}
    </div>
  )
}