import { z } from 'zod';
export interface PostcodeRecord {
postcode: string;
positionalQuality: number;
easting: number;
northing: number;
countryCode: string;
nhsRegionalHaCode: string;
nhsHaCode: string;
adminCountyCode: string;
adminDistrictCode: string;
adminWardCode: string;
}
export interface PostcodeDistance extends PostcodeRecord {
distanceMeters: number;
}
export const PostcodeLookupParamsSchema = z
.object({
postcode: z.string().optional(),
easting: z.number().optional(),
northing: z.number().optional(),
limit: z.number().int().positive().max(500).default(10),
radiusMeters: z.number().positive().max(200000).optional(),
includeSelf: z.boolean().optional(),
adminDistrict: z.string().optional(),
})
.refine(
data => data.postcode || (typeof data.easting === 'number' && typeof data.northing === 'number'),
{ message: 'Provide a postcode or both easting and northing' }
);
export type PostcodeLookupParams = z.infer<typeof PostcodeLookupParamsSchema>;
export interface PostcodeLookupResult {
center: PostcodeRecord;
postcodes: PostcodeDistance[];
total: number;
}
