import { PointCloudBounds } from '../core/types';
import { NodeKey, NodeState } from './streaming-types';
/**
 * EPT metadata from ept.json
 */
export interface EptMetadata {
    /** Bounds of the octree cube [minX, minY, minZ, maxX, maxY, maxZ] */
    bounds: [number, number, number, number, number, number];
    /** Tighter bounds conforming to actual data */
    boundsConforming: [number, number, number, number, number, number];
    /** Data encoding format */
    dataType: 'laszip' | 'binary' | 'zstandard';
    /** Hierarchy file compression type */
    hierarchyType: 'json' | 'gzip';
    /** Total number of points (some EPT versions use 'points' instead) */
    numPoints: number;
    /** Schema definition for point attributes */
    schema: EptDimension[];
    /** Voxel grid dimension per axis (e.g., 256) */
    span: number;
    /** Spatial reference system */
    srs: EptSrs;
    /** EPT format version */
    version: string;
}
/**
 * EPT dimension schema entry
 */
export interface EptDimension {
    /** Dimension name (e.g., "X", "Y", "Z", "Intensity") */
    name: string;
    /** Data type */
    type: 'signed' | 'unsigned' | 'float';
    /** Size in bytes (1, 2, 4, or 8) */
    size: number;
    /** Scale factor to apply when reading */
    scale?: number;
    /** Offset to add after scaling */
    offset?: number;
}
/**
 * EPT Spatial Reference System
 */
export interface EptSrs {
    /** Authority name (e.g., "EPSG") */
    authority?: string;
    /** Horizontal coordinate system code */
    horizontal?: string;
    /** Vertical coordinate system code */
    vertical?: string;
    /** Well-Known Text representation */
    wkt?: string;
}
/**
 * EPT hierarchy JSON structure
 * Key format: "D-X-Y-Z" (depth-x-y-z)
 * Value: point count (>=0) or -1 (subtree in separate file)
 */
export type EptHierarchy = Record<string, number>;
/**
 * Cached EPT node with loading state
 */
export interface EptCachedNode {
    /** String format key: "depth-x-y-z" */
    key: string;
    /** Array format key: [depth, x, y, z] */
    keyArray: NodeKey;
    /** Current state of the node */
    state: NodeState;
    /** Number of points in this node */
    pointCount: number;
    /** Bounding box in source CRS */
    bounds: PointCloudBounds;
    /** Bounding box in WGS84 (for viewport intersection) */
    boundsWgs84: PointCloudBounds;
    /** Distance from viewport center (for priority queue) */
    priority?: number;
    /** Points array slice start index in the main buffer */
    bufferStartIndex?: number;
    /** Error message if state is 'error' */
    error?: string;
    /** Number of load retry attempts */
    retryCount?: number;
    /** Timestamp of last failed attempt (for retry cooldown) */
    lastFailedAt?: number;
}
/**
 * Parsed schema dimension with getter function
 */
export interface ParsedDimension {
    /** Original dimension definition */
    dimension: EptDimension;
    /** Byte offset within a point record */
    byteOffset: number;
    /** Function to read value from DataView */
    getter: (dataView: DataView, pointByteOffset: number) => number;
}
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