import {z} from 'zod'

export type TransportMode = 'parcel' | 'postal' | 'express' | 'road_freight' | 'air_cargo' | 'ocean_container';

export type DeliveryCompletionScope = 'carrier_acceptance_to_delivery' | 'airport_to_airport' | 'airport_to_availability' | 'port_to_port' | 'port_to_availability' | 'port_to_gate_out';

export type DeliveryEstimateLocation = {country_code: string, admin1_code?: string | undefined, city?: string | undefined, iata?: string | undefined, unlocode?: string | undefined, port_name?: string | undefined};

export type DeliveryEstimateInput = {client_reference?: string | undefined, carrier_slug: string, carrier_name?: string | undefined, transport_mode: TransportMode, completion_scope?: DeliveryCompletionScope | undefined, origin: DeliveryEstimateLocation, destination: DeliveryEstimateLocation, accepted_at?: string | undefined, shipped_at?: string | undefined, elapsed_days?: number | undefined} | {client_reference?: string | undefined, carrier_slug?: string | undefined, carrier_name: string, transport_mode: TransportMode, completion_scope?: DeliveryCompletionScope | undefined, origin: DeliveryEstimateLocation, destination: DeliveryEstimateLocation, accepted_at?: string | undefined, shipped_at?: string | undefined, elapsed_days?: number | undefined};

export type DeliveryEstimateRequest = {shipments: Array<DeliveryEstimateInput>};

export type CreateApiDeliveryEstimatesArgs = {body: DeliveryEstimateRequest};

export type CreateApiDeliveryEstimatesOptions = {baseUrl: string, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const transportMode = z.enum(["parcel", "postal", "express", "road_freight", "air_cargo", "ocean_container"]);

export const deliveryCompletionScope = z.enum(["carrier_acceptance_to_delivery", "airport_to_airport", "airport_to_availability", "port_to_port", "port_to_availability", "port_to_gate_out"]);

export const deliveryEstimateRoute = z.object({origin_dimension: z.enum(["city", "admin1", "country", "airport", "port"]).nullable().optional(), origin_key: z.string().nullable().optional(), destination_dimension: z.enum(["city", "admin1", "country", "airport", "port"]).nullable().optional(), destination_key: z.string().nullable().optional(), carrier_specific: z.boolean().optional()});

export const deliveryEstimateRange = z.object({min: z.number().gte(0).optional(), max: z.number().gte(0).optional()});

export const deliveryEstimateRemaining = z.object({mean: z.number().gte(0).nullable().optional(), median: z.number().gte(0).optional(), min: z.number().gte(0).optional(), max: z.number().gte(0).optional()}).nullable();

export const deliveryEstimateWindow = z.object({from: z.string().optional(), to: z.string().optional()}).nullable();

export const deliveryEstimateValues = z.object({mean_days: z.number().gte(0), median_days: z.number().gte(0), typical_days: deliveryEstimateRange, remaining_status: z.enum(["not_requested", "estimated", "insufficient_censored_data", "insufficient_tail_data"]), remaining_days: deliveryEstimateRemaining.optional(), estimated_delivery_at: deliveryEstimateWindow.optional()});

export const deliveryEstimateConfidence = z.object({level: z.enum(["low", "medium", "high"]), score: z.number().gte(0).lte(1), sample_count: z.number().int().gte(8), effective_sample_count: z.number().gte(0), remaining_effective_sample_count: z.number().gte(0).optional(), minimum_remaining_effective_sample_count: z.number().gte(1).optional(), survival_subject_count: z.number().int().gte(0).optional(), survival_completed_count: z.number().int().gte(0).optional(), survival_censored_count: z.number().int().gte(0).optional(), survival_risk_set: z.number().int().gte(0).optional(), survival_minimum_subject_count: z.number().int().gte(1).optional(), survival_minimum_completed_count: z.number().int().gte(1).optional(), survival_cohort_age_days: z.number().gte(0).optional(), survival_minimum_maturation_days: z.number().int().gte(1).optional(), lookback_days: z.number().int().gte(1), last_observation_at: z.string().nullable().optional(), freshness_days: z.number().gte(0).optional(), fallback_level: z.number().int().gte(0)});

export const deliveryEstimateInsufficientData = z.object({code: z.literal("INSUFFICIENT_DATA"), message: z.string(), available_sample_count: z.number().int().gte(0), minimum_sample_count: z.number().int().gte(1)});

export const deliveryEstimateResult = z.object({client_reference: z.string().optional(), carrier_slug: z.string(), transport_mode: transportMode, completion_scope: deliveryCompletionScope, route_scope_used: z.string().optional(), route: deliveryEstimateRoute.optional(), estimate: deliveryEstimateValues.optional(), confidence: deliveryEstimateConfidence.optional(), model: z.object({version: z.string().optional(), unit: z.literal("calendar_days").optional(), histogram_bucket_hours: z.number().int().optional(), remaining_method: z.enum(["kaplan_meier_right_censored_v1", "completed_tail_guard_v1"]).optional()}).optional(), error: deliveryEstimateInsufficientData.optional()});

export const deliveryEstimateResponse = z.object({results: z.array(deliveryEstimateResult), generated_at: z.string(), model_version: z.string()});

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
};

/**
 * Forecast delivery time (beta)
 * 
 * POST /delivery-estimates
 */
export const createApiDeliveryEstimates = async (args: CreateApiDeliveryEstimatesArgs, options: CreateApiDeliveryEstimatesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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