import {z} from 'zod'

export type GetApiOptimizationV2ResultArgs = {key: unknown, id: string};

export type GetApiOptimizationV2ResultOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const summary = z.object({cost: z.number().int().optional(), routes: z.number().int().optional(), unassigned: z.number().int().optional(), duration: z.number().int().optional(), distance: z.number().optional(), setup: z.number().int().optional(), service: z.number().int().optional(), waiting_time: z.number().int().optional(), priority: z.number().int().optional(), delivery: z.array(z.number().int()).optional(), pickup: z.array(z.number().int()).optional(), revenue: z.number().int().optional(), total_visit_lateness: z.number().int().optional(), num_late_visits: z.number().int().optional()});

export const unassigned = z.object({id: z.string().optional(), type: z.string().optional(), location: z.array(z.number()).optional(), reason: z.string().optional(), outsourcing_cost: z.number().int().optional()});

export const stepRouteResponse = z.object({id: z.string().optional(), type: z.string().optional(), arrival: z.number().int().optional(), duration: z.number().int().optional(), location: z.array(z.number()).optional(), projected_location: z.array(z.number()).optional(), location_index: z.number().int().optional(), load: z.array(z.number().int()).optional(), service: z.number().int().optional(), waiting_time: z.number().int().optional(), setup: z.number().int().optional(), late_by: z.string().optional(), description: z.string().optional(), distance: z.number().int().optional(), metadata: z.object({}).optional(), snapped_location: z.array(z.number()).optional(), run: z.number().int().optional(), depot: z.string().optional()});

export const routeRouteResponse = z.object({vehicle: z.string().optional(), cost: z.number().int().optional(), steps: z.array(stepRouteResponse).optional(), description: z.string().optional(), distance: z.number().optional(), duration: z.number().int().optional(), geometry: z.string().optional(), pickup: z.array(z.number().int()).optional(), delivery: z.array(z.number().int()).optional(), priority: z.number().int().optional(), service: z.number().int().optional(), vehicle_overtime: z.number().int().optional(), waiting_time: z.number().int().optional(), setup: z.number().int().optional(), metadata: z.object({}).optional(), revenue: z.number().int().optional(), profile: z.string().optional(), adopted_capacity: z.array(z.number().int()).optional()});

export const optimizationResult = z.object({code: z.number().int().optional(), summary: summary.optional(), unassigned: z.array(unassigned).optional(), routes: z.array(routeRouteResponse).optional(), routing_profiles: z.object({}).optional(), error: z.string().optional()});

export const gETResponse = z.object({description: z.string().optional(), result: optimizationResult.optional(), status: z.enum(["Ok", "Error"]).optional(), message: z.string().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
};

/**
 * Flexible GET
 * 
 * GET /optimization/v2/result
 */
export const getApiOptimizationV2Result = async (args: GetApiOptimizationV2ResultArgs, options?: GetApiOptimizationV2ResultOptions) => {
const {baseUrl = "https://api.nextbillion.io", 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.id != null) query.append("id", String(args.id))
if (apiKey !== undefined) query.set("key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/optimization/v2/result${query.size > 0 ? `?${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(gETResponse, await res.json())
};