import { useCallback, useMemo, useRef, useState } from "react";
import { createAnalysisArtifactFixture } from "./analysis-document-fixtures";
import {
  collapseActiveArtifact,
  createInitialArtifactWorkspaceState,
  destroyActiveArtifact,
  destroyPendingArtifact,
  openPendingArtifact,
  previewAnalysisArtifact,
  requestArtifactView,
  resolveWorkbenchSurfaceMode,
  ARTIFACT_MAP_SPLIT_MIN_WIDTH,
  type ArtifactRequestedView
} from "./workspace-model";

export function useArtifactWorkspace(businessWorkspaceWidth: number) {
  const [state, setState] = useState(createInitialArtifactWorkspaceState);
  const fixtureIndexRef = useRef(0);
  const fixtureInstanceRef = useRef(0);

  const createTestArtifactPreview = useCallback(() => {
    const artifact = createAnalysisArtifactFixture(
      fixtureIndexRef.current,
      fixtureInstanceRef.current
    );
    fixtureIndexRef.current = (fixtureIndexRef.current + 1) % 3;
    fixtureInstanceRef.current += 1;
    setState((current) => previewAnalysisArtifact(current, artifact));
  }, []);

  const openPreview = useCallback(() => {
    setState(openPendingArtifact);
  }, []);

  const collapseArtifact = useCallback(() => {
    setState(collapseActiveArtifact);
  }, []);

  const destroyPreview = useCallback(() => {
    setState(destroyPendingArtifact);
  }, []);

  const destroyArtifact = useCallback(() => {
    setState(destroyActiveArtifact);
  }, []);

  const setView = useCallback((view: ArtifactRequestedView) => {
    setState((current) => requestArtifactView(current, view));
  }, []);

  const surfaceMode = useMemo(
    () => resolveWorkbenchSurfaceMode(state, businessWorkspaceWidth),
    [businessWorkspaceWidth, state]
  );

  return {
    ...state,
    surfaceMode,
    mapSplitAvailable: businessWorkspaceWidth >= ARTIFACT_MAP_SPLIT_MIN_WIDTH,
    createTestArtifactPreview,
    openPreview,
    collapseArtifact,
    destroyPreview,
    destroyArtifact,
    setView
  };
}