import {z} from 'zod'

export type GetApiFlightsArgs = {key: string, depIata?: string | undefined, depIcao?: string | undefined, arrIata?: string | undefined, arrIcao?: string | undefined, airlineIcao?: string | undefined, aircraftIcao?: string | undefined, regNum?: string | undefined, aircraftIcao24?: string | undefined, airlineIata?: string | undefined, flightIata?: string | undefined, flightIcao?: string | undefined, flightNum?: string | undefined, status?: string | undefined, limit?: string | undefined, lat?: string | undefined, lng?: string | undefined, distance?: string | undefined};

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

export const flightTrackingResponse = z.object({aircraft: z.object({iataCode: z.string().optional(), icao24: z.string().optional(), icaoCode: z.string().optional(), regNumber: z.string().optional()}).optional(), airline: z.object({iataCode: z.string().optional(), icaoCode: z.string().optional()}).optional(), arrival: z.object({iataCode: z.string().optional(), icaoCode: z.string().optional()}).optional(), departure: z.object({iataCode: z.string().optional(), icaoCode: z.string().optional()}).optional(), flight: z.object({iataNumber: z.string().optional(), icaoNumber: z.string().optional(), number: z.string().optional()}).optional(), geography: z.object({altitude: z.number().optional(), direction: z.number().optional(), latitude: z.number().optional(), longitude: z.number().optional()}).optional(), speed: z.object({horizontal: z.number().optional(), isGround: z.number().optional(), vspeed: z.number().optional()}).optional(), status: z.string().optional(), system: z.object({squawk: z.number().optional(), updated: 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
};

/**
 * Real-time aircraft position, speed, flight details, status and more for live flights.
 * 
 * GET /flights
 */
export const getApiFlights = async (args: GetApiFlightsArgs, options?: GetApiFlightsOptions) => {
const {baseUrl = "https://aviation-edge.com/v2/public", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.key != null) query.append("key", String(args.key))
if (args.depIata != null) query.append("depIata", String(args.depIata))
if (args.depIcao != null) query.append("depIcao", String(args.depIcao))
if (args.arrIata != null) query.append("arrIata", String(args.arrIata))
if (args.arrIcao != null) query.append("arrIcao", String(args.arrIcao))
if (args.airlineIcao != null) query.append("airlineIcao", String(args.airlineIcao))
if (args.aircraftIcao != null) query.append("aircraftIcao", String(args.aircraftIcao))
if (args.regNum != null) query.append("regNum", String(args.regNum))
if (args.aircraftIcao24 != null) query.append("aircraftIcao24", String(args.aircraftIcao24))
if (args.airlineIata != null) query.append("airlineIata", String(args.airlineIata))
if (args.flightIata != null) query.append("flightIata", String(args.flightIata))
if (args.flightIcao != null) query.append("flightIcao", String(args.flightIcao))
if (args.flightNum != null) query.append("flightNum", String(args.flightNum))
if (args.status != null) query.append("status", String(args.status))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.lat != null) query.append("lat", String(args.lat))
if (args.lng != null) query.append("lng", String(args.lng))
if (args.distance != null) query.append("distance", String(args.distance))
if (apiKey !== undefined) query.set("key", apiKey)

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