import {z} from 'zod'

export type BasePayoutStructure = {percentPayout: number, thresholdValue: number};

export type CoordinatePoint = {latitude: number, longitude: number};

export type WeatherMetric = 'temperatureHigh' | 'temperatureLow' | 'precipitation' | 'rainfall' | 'snowfall' | 'windSpeed' | 'gustSpeed' | 'radiation' | 'evaporation' | 'uvIndex';

export type WeatherRequest = {startDate: string, endDate?: string | undefined, coverType: 'aggregate' | 'occurrence', policyLimit?: number | undefined, deductible?: number | undefined, payoutStructure: Array<BasePayoutStructure>, thresholdType?: ('atleast' | 'atmost') | undefined, distanceUnit?: ('miles' | 'km') | undefined, coordinates: Array<CoordinatePoint>, coordinatesFormat?: ('standard' | 'geojson') | undefined, radius?: number | undefined, maximumDepth?: number | undefined, metric: WeatherMetric, event_type?: string | undefined};

export type CreateApiV1WeatherArgs = {body: WeatherRequest};

export type CreateApiV1WeatherOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV1WeatherResponse = z.unknown();

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
};

/**
 * Post Weather
 * 
 * POST /v1/weather
 */
export const createApiV1Weather = async (args: CreateApiV1WeatherArgs, options: CreateApiV1WeatherOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("Authorization", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/weather${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

return validateResponse(createApiV1WeatherResponse, await res.json())
};