import {z} from 'zod'

export type GetApiCoordinatesSearchQueryJsonArgs = {query: string, limit?: number | undefined, offset?: number | undefined, transformations?: boolean | undefined, exports?: boolean | undefined};

export type GetApiCoordinatesSearchQueryJsonOptions = {baseUrl?: string | undefined, key?: string | undefined, fetch?: typeof fetch | undefined};

export const id = z.object({authority: z.string(), code: z.number().int()});

export const exportItem = z.object({proj4: z.string().optional(), wkt: z.string().optional()});

export const getApiCoordinatesSearchQueryJsonResponse = z.object({results: z.array(z.object({accuracy: z.number().optional(), area: z.string().optional(), bbox: z.array(z.number()).optional(), default_transformation: id.optional(), deprecated: z.boolean(), exports: exportItem.optional(), id: id, kind: z.string(), name: z.string(), transformations: z.array(z.union([z.object({accuracy: z.number().optional(), area: z.string().optional(), bbox: z.array(z.number()).optional(), deprecated: z.boolean(), exports: exportItem.optional(), grids: z.array(z.object({path: z.string()})), id: id, name: z.string(), reversible: z.boolean(), target_crs: id.optional(), unit: z.string().optional(), usable: z.boolean()}), z.number().int()])).optional(), unit: z.string().optional()})), total: z.number().int()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Search coordinate systems
 * 
 * GET /coordinates/search/{query}.json
 */
export const getApiCoordinatesSearchQueryJson = async (args: GetApiCoordinatesSearchQueryJsonArgs, options?: GetApiCoordinatesSearchQueryJsonOptions) => {
const {baseUrl = "https://api.maptiler.com", fetch: fetchFn = fetch, key} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))
if (args.transformations != null) query.append("transformations", String(args.transformations))
if (args.exports != null) query.append("exports", String(args.exports))
if (key !== undefined) query.set("key", key)

const url = `${baseUrl.replace(/\/+$/, '')}/coordinates/search/${encodeURIComponent(String(args.query))}.json${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiCoordinatesSearchQueryJsonResponse, await res.json())
};