import { OpenAssistantTool } from '@openassistant/utils';
import { z } from 'zod';
import { SpatialToolContext } from '../types';
export type AreaFunctionArgs = z.ZodObject<{
    geojson: z.ZodOptional<z.ZodString>;
    datasetName: z.ZodOptional<z.ZodString>;
    distanceUnit: z.ZodDefault<z.ZodEnum<['KM', 'Mile']>>;
}>;
export type AreaLlmResult = {
    success: boolean;
    result: string;
    areas: number[];
    distanceUnit: 'KM' | 'Mile';
};
export type AreaAdditionalData = {
    datasetName?: string;
    geojson?: string;
    distanceUnit: 'KM' | 'Mile';
    areas: number[];
};
/**
 * ## area Tool
 *
 * This tool calculates the area of geometries in a GeoJSON dataset.
 * It supports both direct GeoJSON input and dataset names, and can calculate areas in either square kilometers or square miles.
 *
 * ### Area Calculation
 *
 * The tool calculates the area of various geometry types:
 * - **Polygons**: Calculates the area of polygon geometries
 * - **MultiPolygons**: Calculates the total area of multipolygon geometries
 * - **FeatureCollections**: Calculates areas for all polygon features in the collection
 *
 * ### Parameters
 * - `datasetName`: Name of the dataset with geometries to calculate area for (optional)
 * - `geojson`: GeoJSON string of geometries to calculate area for (optional)
 * - `distanceUnit`: Unit for area calculation - 'KM' for square kilometers or 'Mile' for square miles
 *
 * **Example user prompts:**
 * - "Calculate the area of these counties in square kilometers"
 * - "What is the total area of these land parcels in square miles?"
 * - "Measure the area of these polygons"
 *
 * ### Example
 * ```typescript
 * import { area } from "@openassistant/geoda";
 * import { convertToVercelAiTool } from "@openassistant/utils";
 *
 * const areaTool = {
 *   ...area,
 *   context: {
 *     getGeometries: async (datasetName: string) => {
 *       // Implementation to retrieve geometries from your data source
 *       return geometries;
 *     },
 *   },
 * };
 *
 * const result = await generateText({
 *   model: openai('gpt-4.1', { apiKey: key }),
 *   prompt: 'Calculate the area of these counties in square kilometers',
 *   tools: { area: convertToVercelAiTool(areaTool) },
 * });
 * ```
 *
 * :::tip
 * You can also use this tool with other tools, e.g. geocoding, so you don't need to provide the `getGeometries` function.
 * The geometries from geocoding tool will be used as the input for this tool.
 * :::
 */
export declare const area: OpenAssistantTool<AreaFunctionArgs, AreaLlmResult, AreaAdditionalData, SpatialToolContext>;
export type AreaTool = typeof area;