import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import type { LiveTelemetryResponse, LiveFeedSnapshot } from '@/types'
import { getLiveTelemetry } from '@/api/client'

export const useTelemetryStore = defineStore('telemetry', () => {
  const feeds = ref<LiveFeedSnapshot[]>([])
  const activeRecording = ref<string | null>(null)
  const connected = ref(false)
  const error = ref<string | null>(null)
  const lastUpdate = ref<Date | null>(null)

  let pollTimer: ReturnType<typeof setInterval> | null = null

  const anyFeedAlive = computed(() => feeds.value.some((f) => f.health === 'alive'))
  const anyFeedStale = computed(() => feeds.value.some((f) => f.health === 'stale'))
  const totalPackets = computed(() => feeds.value.reduce((sum, f) => sum + f.total_packets, 0))
  const simConnected = computed(() => anyFeedAlive.value || anyFeedStale.value)

  const overallStatus = computed((): 'connected' | 'sim-active' | 'sim-stale' | 'disconnected' => {
    if (!connected.value) return 'disconnected'
    if (anyFeedAlive.value) return 'sim-active'
    if (anyFeedStale.value) return 'sim-stale'
    return 'connected'
  })

  const overallStatusLabel = computed((): string => {
    switch (overallStatus.value) {
      case 'sim-active': return 'Sim Connected'
      case 'sim-stale': return 'Sim Stale'
      case 'connected': return 'API Connected — No Sim'
      case 'disconnected': return 'API Disconnected'
    }
  })

  const overallStatusClass = computed((): string => {
    switch (overallStatus.value) {
      case 'sim-active': return 'badge-success'
      case 'sim-stale': return 'badge-warning'
      case 'connected': return 'badge-primary'
      case 'disconnected': return 'badge-error'
    }
  })

  async function fetchLive() {
    try {
      const data: LiveTelemetryResponse = await getLiveTelemetry()
      feeds.value = data.feeds
      activeRecording.value = data.active_recording
      connected.value = true
      error.value = null
      lastUpdate.value = new Date()
    } catch (e: unknown) {
      connected.value = false
      error.value = e instanceof Error ? e.message : 'Connection failed'
    }
  }

  function startPolling(intervalMs = 250) {
    stopPolling()
    fetchLive()
    pollTimer = setInterval(fetchLive, intervalMs)
  }

  function stopPolling() {
    if (pollTimer !== null) {
      clearInterval(pollTimer)
      pollTimer = null
    }
  }

  return {
    feeds,
    activeRecording,
    connected,
    error,
    lastUpdate,
    anyFeedAlive,
    anyFeedStale,
    totalPackets,
    simConnected,
    overallStatus,
    overallStatusLabel,
    overallStatusClass,
    fetchLive,
    startPolling,
    stopPolling,
  }
})