import {z} from 'zod'

export type GetApiOptimizationJsonArgs = {coordinates: unknown, destination?: ('any' | 'last') | undefined, geometries?: ('polyline' | 'polyline6' | 'geojson') | undefined, key: unknown, mode?: ('car' | 'truck') | undefined, roundtrip?: boolean | undefined, source?: ('any' | 'first') | undefined, with_geometry?: boolean | undefined, approaches?: ('unrestricted' | 'curb') | undefined};

export type GetApiOptimizationJsonOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiOptimizationJsonResponse = z.object({code: z.string().optional(), trips: z.array(z.object({distance: z.number().optional(), duration: z.number().optional(), geojson: z.object({geometry: z.string().optional(), properties: z.string().optional(), type: z.enum(["Point", "MultiPoint", "LineString", "MultiLineString", "Polygon", "MultiPolygon", "GeometryCollection", "Feature", "FeatureCollection", "Link"]).optional()}).optional(), geometry: z.string().optional(), legs: z.array(z.object({distance: z.number().optional(), duration: z.number().optional(), steps: z.array(z.object({distance: z.number().optional(), duration: z.number().optional(), geojson: z.object({geometry: z.string().optional(), properties: z.string().optional(), type: z.enum(["Point", "MultiPoint", "LineString", "MultiLineString", "Polygon", "MultiPolygon", "GeometryCollection", "Feature", "FeatureCollection", "Link"]).optional()}).optional(), geometry: z.string().optional()})).optional(), summary: z.string().optional()})).optional()})).optional(), waypoints: z.array(z.object({location: z.object({latitude: z.number().optional(), longitude: z.number().optional()}).optional(), name: z.string().optional(), trips_index: z.number().int().optional(), waypoint_index: z.number().int().optional()})).optional(), location: z.object({latitude: z.number().optional(), longitude: z.number().optional()}).optional()});

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
};

/**
 * Optimization
 * 
 * GET /optimization/json
 */
export const getApiOptimizationJson = async (args: GetApiOptimizationJsonArgs, options?: GetApiOptimizationJsonOptions) => {
const {baseUrl = "https://api.nextbillion.io", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.coordinates != null) query.append("coordinates", String(args.coordinates))
if (args.destination != null) query.append("destination", String(args.destination))
if (args.geometries != null) query.append("geometries", String(args.geometries))
if (args.key != null) query.append("key", String(args.key))
if (args.mode != null) query.append("mode", String(args.mode))
if (args.roundtrip != null) query.append("roundtrip", String(args.roundtrip))
if (args.source != null) query.append("source", String(args.source))
if (args.with_geometry != null) query.append("with_geometry", String(args.with_geometry))
if (args.approaches != null) query.append("approaches", String(args.approaches))
if (apiKey !== undefined) query.set("key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/optimization/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(getApiOptimizationJsonResponse, await res.json())
};