import {z} from 'zod'

export type NoisePort = {portCode: string};

export type NoiseVessel = {imo?: number | undefined, mmsi?: number | undefined};

export type ComputeNoiseRequest = {departure: NoisePort, vessel: NoiseVessel, arrival: NoisePort};

export type CreateApiComputeNoiseArgs = {body: ComputeNoiseRequest};

export type CreateApiComputeNoiseOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const noisePort = z.object({portCode: z.string()});

export const noiseVessel = z.object({imo: z.number().int().optional(), mmsi: z.number().int().optional()});

export const computeNoiseRequest = z.object({departure: noisePort, vessel: noiseVessel, arrival: noisePort});

export const computeNoiseResponse = z.object({input: computeNoiseRequest.optional(), sel: z.number().optional(), duration: z.number().int().optional(), isAboveRecommendedThresholds: z.object({LloydsTransit: z.boolean().optional(), BureauVeritasStandard: z.boolean().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
};

/**
 * Retrieve Noise emitted for a trip from one port to another.
 * 
 * POST /compute-noise
 */
export const createApiComputeNoise = async (args: CreateApiComputeNoiseArgs, options?: CreateApiComputeNoiseOptions) => {
const {baseUrl = "https://api.sinay.ai/noise/api/v1", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (ApiKey !== undefined) headers.set("API_KEY", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/compute-noise${query.size > 0 ? `?${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(computeNoiseResponse, await res.json())
};