import {z} from 'zod'

export type MandateSealedPaymentPlanLegDto = {legIndex: number, sourceAmountMinor: string, sourceCurrency: string, sourceAccountId: string, sourceRail: string, destinationAmountMinor: string, destinationCurrency: string, payeeAccountId: string, destinationRail: string};

export type MandateSealedPaymentPlanDto = {v: number, legs: Array<MandateSealedPaymentPlanLegDto>};

export type MandateDraftProposalDto = {customerId: string, amountMinor: string, currency: string, destinationAccountId: string, destinationRail: string, sourceAccountId?: (string | null) | undefined, sourceRail?: (string | null) | undefined, drafterPrincipalId?: (string | null) | undefined};

export type EvaluateMandateDto = {sealedPlan?: MandateSealedPaymentPlanDto | undefined, proposal?: MandateDraftProposalDto | undefined, asOf?: string | undefined, priorSpendDayMinor?: string | undefined, priorSpendMonthMinor?: string | undefined};

export type CreateApiV1MandatesMandateIdEvaluateArgs = {'X-API-Key'?: string | undefined, mandateId: string, body: EvaluateMandateDto};

export type CreateApiV1MandatesMandateIdEvaluateOptions = {baseUrl?: string | undefined, bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const mandateDenialDto = z.object({code: z.enum(["mandate_not_found", "mandate_not_active", "mandate_outside_validity_window", "mandate_limit_exceeded", "mandate_payee_not_allowed", "mandate_rail_not_allowed", "mandate_drafter_not_allowed", "mandate_currency_mismatch", "mandate_customer_mismatch", "mandate_empty_subject", "mandate_prior_spend_required"]), window: z.enum(["PER_TRANSACTION", "PER_DAY", "PER_MONTH"]).optional(), limit: z.string().optional(), used: z.string().optional(), message: z.string().optional()});

export const mandateEvaluationResponseDto = z.object({allowed: z.boolean(), mandateId: z.string(), denial: mandateDenialDto.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
};

/**
 * Evaluate a mandate against a sealed plan or draft proposal
 * 
 * POST /v1/mandates/{mandateId}/evaluate
 */
export const createApiV1MandatesMandateIdEvaluate = async (args: CreateApiV1MandatesMandateIdEvaluateArgs, options?: CreateApiV1MandatesMandateIdEvaluateOptions) => {
const {baseUrl = "https://sandbox.api.infinite.dev", fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (args['X-API-Key'] != null) headers.set("X-API-Key", String(args['X-API-Key']))
if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/mandates/${encodeURIComponent(String(args.mandateId))}/evaluate${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(mandateEvaluationResponseDto, await res.json())
};