'use client'

import { useCallback, useEffect, useMemo, useRef } from 'react'

import MarkerIcon from '@/components/icons/MarkerIcon'
import { getMapirMapComponent, MAPIR_STYLE_URL } from '@/components/map/mapirMapFactory'
import { getPublicMapApiKey, toMapirLngLat } from '@/helpers/mapir'

interface MapirLocationPickerProps {
  centerLat: number
  centerLng: number
  markerLat?: number | null
  markerLng?: number | null
  zoom?: number
  scrollZoom?: boolean
  height?: number | string
  onLocationPick: (lat: number, lng: number) => void
}

interface MapLike {
  resize: () => void
  jumpTo: (opts: { center: [number, number] }) => void
}

const DEFAULT_ZOOM = 13

const MapirLocationPicker = ({
  centerLat,
  centerLng,
  markerLat,
  markerLng,
  zoom = DEFAULT_ZOOM,
  scrollZoom = true,
  height = '100%',
  onLocationPick,
}: MapirLocationPickerProps) => {
  const apiKey = getPublicMapApiKey()
  const Map = useMemo(() => {
    const k = apiKey.trim()

    if (!k) return null

    return getMapirMapComponent(k)
  }, [apiKey])

  // اگر مارکر انتخاب شده، همان نقطه مرکز نقشه باشد تا پین وسط روی موقعیت درست بنشیند
  const viewLat = markerLat != null && Number.isFinite(markerLat) ? markerLat : centerLat
  const viewLng = markerLng != null && Number.isFinite(markerLng) ? markerLng : centerLng
  const center = useMemo(() => toMapirLngLat(viewLat, viewLng), [viewLat, viewLng])
  const zoomArr = useMemo(() => [zoom] as [number], [zoom])
  const mapRef = useRef<MapLike | null>(null)
  const onPickRef = useRef(onLocationPick)
  const rootRef = useRef<HTMLDivElement | null>(null)
  const hasSelection = markerLat != null && markerLng != null && Number.isFinite(markerLat) && Number.isFinite(markerLng)

  useEffect(() => {
    onPickRef.current = onLocationPick
  }, [onLocationPick])

  useEffect(() => {
    const root = rootRef.current

    if (!root || typeof ResizeObserver === 'undefined') return

    const resize = () => {
      mapRef.current?.resize()
    }
    const observer = new ResizeObserver(resize)

    observer.observe(root)
    const timer = window.setTimeout(resize, 320)

    return () => {
      observer.disconnect()
      window.clearTimeout(timer)
    }
  }, [])

  const onStyleLoad = useCallback((map: MapLike) => {
    mapRef.current = map
    map.resize()
  }, [])

  // mapir-react listener اول onClick را نگه می‌دارد؛ pick را از ref می‌خوانیم
  const onClick = useCallback((_map: MapLike, evt: { lngLat?: { lat: number; lng: number } }) => {
    const ll = evt?.lngLat

    if (!ll) return

    // پین CSS همیشه وسط است؛ با jumpTo نقطهٔ کلیک زیر پین می‌آید
    mapRef.current?.jumpTo({ center: [ll.lng, ll.lat] })
    onPickRef.current(ll.lat, ll.lng)
  }, [])

  if (!Map) {
    return null
  }

  // Map.ir Map is memoized/cached by API key in getMapirMapComponent — not recreated each render.
  /* eslint-disable react-hooks/static-components -- Map component comes from mapir setToken cache */
  return (
    <div
      ref={rootRef}
      className="relative h-full w-full min-h-[240px]"
      data-testid="mapir-location-picker"
    >
      <Map
        center={center}
        containerStyle={{ height, position: 'relative', width: '100%' }}
        maxZoom={22}
        minZoom={0}
        movingMethod="jumpTo"
        scrollZoom={scrollZoom}
        style={MAPIR_STYLE_URL}
        zoom={zoomArr}
        onClick={onClick}
        onStyleLoad={onStyleLoad}
      />
      {/* پین ثابت وسط نقشه — بدون وابستگی به Mapir.Marker که در مودال نامرئی می‌ماند */}
      <div
        aria-hidden
        className={`pointer-events-none absolute inset-0 z-20 flex items-center justify-center ${hasSelection ? 'opacity-100' : 'opacity-70'}`}
      >
        <MarkerIcon className="size-9 -translate-y-1/2 text-primary drop-shadow-md" />
      </div>
    </div>
  )
  /* eslint-enable react-hooks/static-components */
}

export default MapirLocationPicker