import {z} from 'zod'

export type Direction = 'START_TO_STOP' | 'STOP_TO_START';

export type CoreTrackRange = {begin: number, direction: Direction, end: number, track_section: string};

export type PathPropertiesInput = {track_section_ranges: Array<CoreTrackRange>};

export type CreateApiInfraInfraIdPathPropertiesArgs = {infra_id: number, body: PathPropertiesInput};

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

export const corePropertyGeometryProjection = z.object({geom_offsets: z.array(z.number().int().gte(0)), topo_offsets: z.array(z.number().int().gte(0))});

export const geoJsonPointValue = z.array(z.number());

export const geoJsonLineStringValue = z.array(geoJsonPointValue);

export const geoJsonLineString = z.object({coordinates: geoJsonLineStringValue, type: z.literal("LineString")});

export const operationalPointPartSncfExtension = z.object({kp: z.string()});

export const operationalPointPartExtension = z.object({sncf: operationalPointPartSncfExtension.nullable().optional()});

export const nonBlankString = z.string().min(1);

export const operationalPointPart = z.object({extensions: operationalPointPartExtension.optional(), local_track_name: nonBlankString, position: z.number(), track: z.string().min(1).max(255)});

export const coreOperationalPointOnPath = z.object({country_code: z.string().min(1), id: z.string().min(1).max(255), is_passenger_station: z.boolean(), main_code: z.string().min(1), name: z.string().min(1), part: operationalPointPart, plc: z.string().min(1).nullable().optional(), position: z.number().int().gte(0), secondary_code: nonBlankString.nullable().optional(), secondary_name: z.string().min(1).nullable().optional(), uic: z.number().int().gte(0).nullable().optional(), weight: z.number().int().gte(0).lte(100).nullable()});

export const pathProperties = z.object({curves: z.object({boundaries: z.array(z.number().int().gte(0)), values: z.array(z.number())}), electrifications: z.object({boundaries: z.array(z.number().int().gte(0)), values: z.array(z.union([z.object({type: z.literal("electrification"), voltage: z.string()}), z.object({lower_pantograph: z.boolean(), type: z.literal("neutral_section")}), z.object({type: z.literal("non_electrified")})]))}), geom_projection: corePropertyGeometryProjection, geometry: geoJsonLineString, operational_points: z.array(coreOperationalPointOnPath), slopes: z.object({boundaries: z.array(z.number().int().gte(0)), values: z.array(z.number())}), zones: z.object({boundaries: z.array(z.number().int().gte(0)), values: z.array(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
};

/**
 * Compute path properties
 * 
 * POST /infra/{infra_id}/path_properties
 */
export const createApiInfraInfraIdPathProperties = async (args: CreateApiInfraInfraIdPathPropertiesArgs, options?: CreateApiInfraInfraIdPathPropertiesOptions) => {
const {baseUrl = "https://demo.osrd.fr/api", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/infra/${encodeURIComponent(String(args.infra_id))}/path_properties${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(pathProperties, await res.json())
};