import {z} from 'zod'

export type PatchApiPolicyTenantLocatorHoldsLocatorValidateArgs = {tenantLocator: string, locator: unknown};

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

export const quoteHoldScope = z.object({quoteState: z.enum(["validated", "underwritten", "accepted", "priced"])});

export const policyHoldScope = z.object({transactionCategory: z.array(z.enum(["issuance", "change", "renewal", "cancellation", "continuation", "flatCancellation", "reinstatement", "reversal", "aggregate"])), transactionType: z.array(z.string()), allowStaticData: z.boolean()});

export const validationItemResponse = z.object({elementType: z.string(), locator: z.string(), errors: z.array(z.string())});

export const validationResult = z.object({validationItems: z.array(validationItemResponse).optional(), success: z.boolean()});

export const entityHold = z.object({locator: z.string(), referenceLocator: z.string(), referenceType: z.enum(["quote", "policy"]), state: z.enum(["draft", "validated", "active", "discarded", "released"]), holdStaticData: z.boolean(), description: z.string(), quoteHoldScope: quoteHoldScope, policyHoldScope: policyHoldScope, validationResult: validationResult.optional(), createdAt: z.string(), createdBy: 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
};

/**
 * Validates an entity hold by its locator
 * 
 * PATCH /policy/{tenantLocator}/holds/{locator}/validate
 */
export const patchApiPolicyTenantLocatorHoldsLocatorValidate = async (args: PatchApiPolicyTenantLocatorHoldsLocatorValidateArgs, options: PatchApiPolicyTenantLocatorHoldsLocatorValidateOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/policy/${encodeURIComponent(String(args.tenantLocator))}/holds/${encodeURIComponent(String(args.locator))}/validate${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "PATCH", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(entityHold, await res.json())
};