import { useCallback, useEffect, type MutableRefObject } from 'react';
import type maplibregl from 'maplibre-gl';
import type { GeoJSONSource, GeoJSONSourceSpecification, LayerSpecification } from 'maplibre-gl';
import type { FcLink, FleetCircle, PairLink } from '../../../features/legacyDashboard/model/types';
import type { MapToggleState } from '../../../features/mapToggles/MapToggles';
import type { DashSeg, MapProjectionId, PairRangeCircle } from '../types';
import {
  PAIR_LINE_NORMAL_ML, PAIR_LINE_WARN_ML,
  PAIR_LINE_NORMAL_ML_HL, PAIR_LINE_WARN_ML_HL,
  PAIR_RANGE_NORMAL_ML, PAIR_RANGE_WARN_ML,
  PAIR_RANGE_NORMAL_ML_HL, PAIR_RANGE_WARN_ML_HL,
  FC_LINE_NORMAL_ML, FC_LINE_SUSPICIOUS_ML,
  FC_LINE_NORMAL_ML_HL, FC_LINE_SUSPICIOUS_ML_HL,
  FLEET_LINE_ML, FLEET_LINE_ML_HL,
} from '../constants';
import { makeUniqueSorted } from '../lib/setUtils';
import {
  makePairLinkFeatureId,
  makeFcSegmentFeatureId,
  makeFleetCircleFeatureId,
} from '../lib/featureIds';
import {
  makeMmsiPairHighlightExpr,
  makeMmsiAnyEndpointExpr,
  makeFleetOwnerMatchExpr,
  makeFleetMemberMatchExpr,
} from '../lib/mlExpressions';
import { kickRepaint, onMapStyleReady } from '../lib/mapCore';
import { circleRingLngLat } from '../lib/geometry';
import { guardedSetVisibility } from '../lib/layerHelpers';
import { dashifyLine } from '../lib/dashifyLine';

export function useGlobeOverlays(
  mapRef: MutableRefObject<maplibregl.Map | null>,
  projectionBusyRef: MutableRefObject<boolean>,
  reorderGlobeFeatureLayers: () => void,
  opts: {
    overlays: MapToggleState;
    pairLinks: PairLink[] | undefined;
    fcLinks: FcLink[] | undefined;
    fleetCircles: FleetCircle[] | undefined;
    projection: MapProjectionId;
    mapSyncEpoch: number;
    hoveredFleetMmsiList: number[];
    hoveredFleetOwnerKeyList: string[];
    hoveredPairMmsiList: number[];
  },
) {
  const {
    overlays, pairLinks, fcLinks, fleetCircles, projection, mapSyncEpoch,
    hoveredFleetMmsiList, hoveredFleetOwnerKeyList, hoveredPairMmsiList,
  } = opts;

  // Pair lines
  useEffect(() => {
    const map = mapRef.current;
    if (!map) return;

    const srcId = 'pair-lines-ml-src';
    const layerId = 'pair-lines-ml';

    const remove = () => {
      guardedSetVisibility(map, layerId, 'none');
    };

    const ensure = () => {
      if (projectionBusyRef.current) return;
      if (!map.isStyleLoaded()) return;
      if (projection !== 'globe' || !overlays.pairLines || (pairLinks?.length ?? 0) === 0) {
        remove();
        return;
      }

      const fc: GeoJSON.FeatureCollection<GeoJSON.LineString> = {
        type: 'FeatureCollection',
        features: (pairLinks || []).map((p) => ({
          type: 'Feature',
          id: makePairLinkFeatureId(p.aMmsi, p.bMmsi),
          geometry: { type: 'LineString', coordinates: [p.from, p.to] },
            properties: {
              type: 'pair',
              aMmsi: p.aMmsi,
              bMmsi: p.bMmsi,
              distanceNm: p.distanceNm,
              warn: p.warn,
            },
        })),
      };

      try {
        const existing = map.getSource(srcId) as GeoJSONSource | undefined;
        if (existing) existing.setData(fc);
        else map.addSource(srcId, { type: 'geojson', data: fc } as GeoJSONSourceSpecification);
      } catch (e) {
        console.warn('Pair lines source setup failed:', e);
        return;
      }

      if (!map.getLayer(layerId)) {
        try {
          map.addLayer(
            {
              id: layerId,
              type: 'line',
              source: srcId,
              layout: { 'line-cap': 'round', 'line-join': 'round', visibility: 'visible' },
              paint: {
                'line-color': [
                  'case',
                  ['==', ['get', 'highlighted'], 1],
                  ['case', ['boolean', ['get', 'warn'], false], PAIR_LINE_WARN_ML_HL, PAIR_LINE_NORMAL_ML_HL],
                  ['boolean', ['get', 'warn'], false],
                  PAIR_LINE_WARN_ML,
                  PAIR_LINE_NORMAL_ML,
                ] as never,
                'line-width': [
                  'case',
                  ['==', ['get', 'highlighted'], 1], 2.8,
                  ['boolean', ['get', 'warn'], false], 2.2,
                  1.4,
                ] as never,
                'line-opacity': 0.9,
              },
        } as unknown as LayerSpecification,
            undefined,
          );
        } catch (e) {
          console.warn('Pair lines layer add failed:', e);
        }
      } else {
        guardedSetVisibility(map, layerId, 'visible');
      }

      reorderGlobeFeatureLayers();
      kickRepaint(map);
    };

    const stop = onMapStyleReady(map, ensure);
    ensure();
    return () => {
      stop();
    };
  }, [projection, overlays.pairLines, pairLinks, mapSyncEpoch, reorderGlobeFeatureLayers]);

  // FC lines
  useEffect(() => {
    const map = mapRef.current;
    if (!map) return;

    const srcId = 'fc-lines-ml-src';
    const layerId = 'fc-lines-ml';

    const remove = () => {
      guardedSetVisibility(map, layerId, 'none');
    };

    const ensure = () => {
      if (projectionBusyRef.current) return;
      if (!map.isStyleLoaded()) return;
      if (projection !== 'globe' || !overlays.fcLines) {
        remove();
        return;
      }

      const segs: DashSeg[] = [];
      for (const l of fcLinks || []) {
        segs.push(...dashifyLine(l.from, l.to, l.suspicious, l.distanceNm, l.fcMmsi, l.otherMmsi));
      }
      if (segs.length === 0) {
        remove();
        return;
      }

      const fc: GeoJSON.FeatureCollection<GeoJSON.LineString> = {
        type: 'FeatureCollection',
        features: segs.map((s, idx) => ({
          type: 'Feature',
          id: makeFcSegmentFeatureId(s.fromMmsi ?? -1, s.toMmsi ?? -1, idx),
          geometry: { type: 'LineString', coordinates: [s.from, s.to] },
            properties: {
              type: 'fc',
              suspicious: s.suspicious,
              distanceNm: s.distanceNm,
              fcMmsi: s.fromMmsi ?? -1,
              otherMmsi: s.toMmsi ?? -1,
            },
        })),
      };

      try {
        const existing = map.getSource(srcId) as GeoJSONSource | undefined;
        if (existing) existing.setData(fc);
        else map.addSource(srcId, { type: 'geojson', data: fc } as GeoJSONSourceSpecification);
      } catch (e) {
        console.warn('FC lines source setup failed:', e);
        return;
      }

      if (!map.getLayer(layerId)) {
        try {
          map.addLayer(
            {
              id: layerId,
              type: 'line',
              source: srcId,
              layout: { 'line-cap': 'round', 'line-join': 'round', visibility: 'visible' },
              paint: {
                'line-color': [
                  'case',
                  ['==', ['get', 'highlighted'], 1],
                  ['case', ['boolean', ['get', 'suspicious'], false], FC_LINE_SUSPICIOUS_ML_HL, FC_LINE_NORMAL_ML_HL],
                  ['boolean', ['get', 'suspicious'], false],
                  FC_LINE_SUSPICIOUS_ML,
                  FC_LINE_NORMAL_ML,
                ] as never,
                'line-width': ['case', ['==', ['get', 'highlighted'], 1], 2.0, 1.3] as never,
                'line-opacity': 0.9,
              },
        } as unknown as LayerSpecification,
            undefined,
          );
        } catch (e) {
          console.warn('FC lines layer add failed:', e);
        }
      } else {
        guardedSetVisibility(map, layerId, 'visible');
      }

      reorderGlobeFeatureLayers();
      kickRepaint(map);
    };

    const stop = onMapStyleReady(map, ensure);
    ensure();
    return () => {
      stop();
    };
  }, [projection, overlays.fcLines, fcLinks, mapSyncEpoch, reorderGlobeFeatureLayers]);

  // Fleet circles
  useEffect(() => {
    const map = mapRef.current;
    if (!map) return;

    const srcId = 'fleet-circles-ml-src';
    const layerId = 'fleet-circles-ml';

    // fill layer 제거됨 — globe tessellation에서 vertex 65535 초과 경고 원인
    // 라인만으로 fleet circle 시각화 충분

    const remove = () => {
      guardedSetVisibility(map, layerId, 'none');
    };

    const ensure = () => {
      if (projectionBusyRef.current) return;
      if (!map.isStyleLoaded()) return;
      if (projection !== 'globe' || !overlays.fleetCircles || (fleetCircles?.length ?? 0) === 0) {
        remove();
        return;
      }

      const fcLine: GeoJSON.FeatureCollection<GeoJSON.LineString> = {
        type: 'FeatureCollection',
        features: (fleetCircles || []).map((c) => {
          const ring = circleRingLngLat(c.center, c.radiusNm * 1852);
          return {
            type: 'Feature',
            id: makeFleetCircleFeatureId(c.ownerKey),
            geometry: { type: 'LineString', coordinates: ring },
            properties: {
              type: 'fleet',
              ownerKey: c.ownerKey,
              ownerLabel: c.ownerLabel,
              count: c.count,
              vesselMmsis: c.vesselMmsis,
              highlighted: 0,
            },
          };
        }),
      };

      try {
        const existing = map.getSource(srcId) as GeoJSONSource | undefined;
        if (existing) existing.setData(fcLine);
        else map.addSource(srcId, { type: 'geojson', data: fcLine } as GeoJSONSourceSpecification);
      } catch (e) {
        console.warn('Fleet circles source setup failed:', e);
        return;
      }

      if (!map.getLayer(layerId)) {
        try {
          map.addLayer(
            {
              id: layerId,
              type: 'line',
              source: srcId,
              layout: { 'line-cap': 'round', 'line-join': 'round', visibility: 'visible' },
              paint: {
                'line-color': ['case', ['==', ['get', 'highlighted'], 1], FLEET_LINE_ML_HL, FLEET_LINE_ML] as never,
                'line-width': ['case', ['==', ['get', 'highlighted'], 1], 2, 1.1] as never,
                'line-opacity': 0.85,
              },
            } as unknown as LayerSpecification,
            undefined,
          );
        } catch (e) {
          console.warn('Fleet circles layer add failed:', e);
        }
      } else {
        guardedSetVisibility(map, layerId, 'visible');
      }

      reorderGlobeFeatureLayers();
      kickRepaint(map);
    };

    const stop = onMapStyleReady(map, ensure);
    ensure();
    return () => {
      stop();
    };
  }, [projection, overlays.fleetCircles, fleetCircles, mapSyncEpoch, reorderGlobeFeatureLayers]);

  // Pair range
  useEffect(() => {
    const map = mapRef.current;
    if (!map) return;

    const srcId = 'pair-range-ml-src';
    const layerId = 'pair-range-ml';

    const remove = () => {
      guardedSetVisibility(map, layerId, 'none');
    };

    const ensure = () => {
      if (projectionBusyRef.current) return;
      if (!map.isStyleLoaded()) return;
      if (projection !== 'globe' || !overlays.pairRange) {
        remove();
        return;
      }

      const ranges: PairRangeCircle[] = [];
      for (const p of pairLinks || []) {
        const center: [number, number] = [(p.from[0] + p.to[0]) / 2, (p.from[1] + p.to[1]) / 2];
        ranges.push({
          center,
          radiusNm: Math.max(0.05, p.distanceNm / 2),
          warn: p.warn,
          aMmsi: p.aMmsi,
          bMmsi: p.bMmsi,
          distanceNm: p.distanceNm,
        });
      }
      if (ranges.length === 0) {
        remove();
        return;
      }

      const fc: GeoJSON.FeatureCollection<GeoJSON.LineString> = {
        type: 'FeatureCollection',
        features: ranges.map((c) => {
          const ring = circleRingLngLat(c.center, c.radiusNm * 1852);
          return {
            type: 'Feature',
            id: makePairLinkFeatureId(c.aMmsi, c.bMmsi),
            geometry: { type: 'LineString', coordinates: ring },
            properties: {
              type: 'pair-range',
              warn: c.warn,
              aMmsi: c.aMmsi,
              bMmsi: c.bMmsi,
              distanceNm: c.distanceNm,
              highlighted: 0,
            },
          };
        }),
      };

      try {
        const existing = map.getSource(srcId) as GeoJSONSource | undefined;
        if (existing) existing.setData(fc);
        else map.addSource(srcId, { type: 'geojson', data: fc } as GeoJSONSourceSpecification);
      } catch (e) {
        console.warn('Pair range source setup failed:', e);
        return;
      }

      if (!map.getLayer(layerId)) {
        try {
          map.addLayer(
            {
              id: layerId,
              type: 'line',
              source: srcId,
              layout: { 'line-cap': 'round', 'line-join': 'round', visibility: 'visible' },
              paint: {
                'line-color': [
                  'case',
                  ['==', ['get', 'highlighted'], 1],
                  ['case', ['boolean', ['get', 'warn'], false], PAIR_RANGE_WARN_ML_HL, PAIR_RANGE_NORMAL_ML_HL],
                  ['boolean', ['get', 'warn'], false],
                  PAIR_RANGE_WARN_ML,
                  PAIR_RANGE_NORMAL_ML,
                ] as never,
                'line-width': ['case', ['==', ['get', 'highlighted'], 1], 1.6, 1.0] as never,
                'line-opacity': 0.85,
              },
            } as unknown as LayerSpecification,
            undefined,
          );
        } catch (e) {
          console.warn('Pair range layer add failed:', e);
        }
      } else {
        guardedSetVisibility(map, layerId, 'visible');
      }

      kickRepaint(map);
    };

    const stop = onMapStyleReady(map, ensure);
    ensure();
    return () => {
      stop();
    };
  }, [projection, overlays.pairRange, pairLinks, mapSyncEpoch, reorderGlobeFeatureLayers]);

  // Paint state updates for hover highlights
  // eslint-disable-next-line react-hooks/preserve-manual-memoization
  const updateGlobeOverlayPaintStates = useCallback(() => {
    if (projection !== 'globe' || projectionBusyRef.current) return;

    const map = mapRef.current;
    if (!map || !map.isStyleLoaded()) return;

    const fleetAwarePairMmsiList = makeUniqueSorted([...hoveredPairMmsiList, ...hoveredFleetMmsiList]);

    const pairHighlightExpr = hoveredPairMmsiList.length >= 2
      ? makeMmsiPairHighlightExpr('aMmsi', 'bMmsi', hoveredPairMmsiList)
      : false;

    const fcEndpointHighlightExpr = fleetAwarePairMmsiList.length > 0
      ? makeMmsiAnyEndpointExpr('fcMmsi', 'otherMmsi', fleetAwarePairMmsiList)
      : false;

    const fleetOwnerMatchExpr =
      hoveredFleetOwnerKeyList.length > 0 ? makeFleetOwnerMatchExpr(hoveredFleetOwnerKeyList) : false;
    const fleetMemberExpr =
      hoveredFleetMmsiList.length > 0 ? makeFleetMemberMatchExpr(hoveredFleetMmsiList) : false;
    const fleetHighlightExpr =
      hoveredFleetOwnerKeyList.length > 0 || hoveredFleetMmsiList.length > 0
        ? (['any', fleetOwnerMatchExpr, fleetMemberExpr] as never)
        : false;

    try {
      if (map.getLayer('pair-lines-ml')) {
        map.setPaintProperty(
          'pair-lines-ml', 'line-color',
          ['case', pairHighlightExpr, ['case', ['boolean', ['get', 'warn'], false], PAIR_LINE_WARN_ML_HL, PAIR_LINE_NORMAL_ML_HL], ['boolean', ['get', 'warn'], false], PAIR_LINE_WARN_ML, PAIR_LINE_NORMAL_ML] as never,
        );
        map.setPaintProperty(
          'pair-lines-ml', 'line-width',
          ['case', pairHighlightExpr, 2.8, ['boolean', ['get', 'warn'], false], 2.2, 1.4] as never,
        );
      }
    } catch {
      // ignore
    }

    try {
      if (map.getLayer('fc-lines-ml')) {
        map.setPaintProperty(
          'fc-lines-ml', 'line-color',
          ['case', fcEndpointHighlightExpr, ['case', ['boolean', ['get', 'suspicious'], false], FC_LINE_SUSPICIOUS_ML_HL, FC_LINE_NORMAL_ML_HL], ['boolean', ['get', 'suspicious'], false], FC_LINE_SUSPICIOUS_ML, FC_LINE_NORMAL_ML] as never,
        );
        map.setPaintProperty(
          'fc-lines-ml', 'line-width',
          ['case', fcEndpointHighlightExpr, 2.0, 1.3] as never,
        );
      }
    } catch {
      // ignore
    }

    try {
      if (map.getLayer('pair-range-ml')) {
        map.setPaintProperty(
          'pair-range-ml', 'line-color',
          ['case', pairHighlightExpr, ['case', ['boolean', ['get', 'warn'], false], PAIR_RANGE_WARN_ML_HL, PAIR_RANGE_NORMAL_ML_HL], ['boolean', ['get', 'warn'], false], PAIR_RANGE_WARN_ML, PAIR_RANGE_NORMAL_ML] as never,
        );
        map.setPaintProperty(
          'pair-range-ml', 'line-width',
          ['case', pairHighlightExpr, 1.6, 1.0] as never,
        );
      }
    } catch {
      // ignore
    }

    try {
      // fleet-circles-ml-fill 제거됨 (vertex 65535 경고 원인)
      if (map.getLayer('fleet-circles-ml')) {
        map.setPaintProperty('fleet-circles-ml', 'line-color', ['case', fleetHighlightExpr, FLEET_LINE_ML_HL, FLEET_LINE_ML] as never);
        map.setPaintProperty('fleet-circles-ml', 'line-width', ['case', fleetHighlightExpr, 2, 1.1] as never);
      }
    } catch {
      // ignore
    }
  }, [projection, hoveredFleetMmsiList, hoveredFleetOwnerKeyList, hoveredPairMmsiList]);

  useEffect(() => {
    const map = mapRef.current;
    if (!map) return;
    const stop = onMapStyleReady(map, updateGlobeOverlayPaintStates);
    updateGlobeOverlayPaintStates();
    return () => {
      stop();
    };
  }, [mapSyncEpoch, hoveredFleetMmsiList, hoveredFleetOwnerKeyList, hoveredPairMmsiList, projection, updateGlobeOverlayPaintStates]);
}