import {z} from 'zod'

export type CreateTradeStrategyRebalanceBody = {allocations: Array<{underlying_currency: string, weight: string}>, participants?: Array<{participant_code: string}> | undefined};

export type CreateApiStrategiesStrategyIdRebalanceArgs = {'X-SCX-SIGNED': string, 'X-SCX-TIMESTAMP': string, strategy_id: string, body: CreateTradeStrategyRebalanceBody};

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

export const tradeStrategyOperationResponse = z.object({message: z.object({id: z.string().optional(), strategy_id: z.string().optional(), request_id: z.string().optional(), type: z.enum(["enrollment", "top_up", "partial_sell", "rebalance", "liquidation"]).optional(), status: z.enum(["validating", "pricing", "settling", "settled", "skipped", "failed"]).optional(), status_reason: z.string().optional(), allocations: z.array(z.object({underlying_currency: z.string(), weight: z.string()})).optional(), created_at: z.string().optional(), updated_at: z.string().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
};

/**
 * Rebalance
 * 
 * POST /strategies/{strategy_id}/rebalance
 */
export const createApiStrategiesStrategyIdRebalance = async (args: CreateApiStrategiesStrategyIdRebalanceArgs, options?: CreateApiStrategiesStrategyIdRebalanceOptions) => {
const {baseUrl = "https://api.cert.zerohash.com", fetch: fetchFn = fetch, apiKey, apiPassphrase} = options ?? {}

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

if (args['X-SCX-SIGNED'] != null) headers.set("X-SCX-SIGNED", String(args['X-SCX-SIGNED']))
if (args['X-SCX-TIMESTAMP'] != null) headers.set("X-SCX-TIMESTAMP", String(args['X-SCX-TIMESTAMP']))
if (apiKey !== undefined) headers.set("X-SCX-API-KEY", apiKey)
if (apiPassphrase !== undefined) headers.set("X-SCX-PASSPHRASE", apiPassphrase)

const url = `${baseUrl.replace(/\/+$/, '')}/strategies/${encodeURIComponent(String(args.strategy_id))}/rebalance${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(tradeStrategyOperationResponse, await res.json())
};