import {z} from 'zod'

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

export const abiTLBType = z.enum(["addr", "bool", "bigInt", "string", "bytes", "cell", "slice", "content", "struct", "tag"]);

export const abiStackType = z.enum(["int", "cell", "slice"]);

export const abiTLBFieldsDesc = z.array(z.lazy(() => abiTLBFieldDesc));

export const abiTLBFieldDesc: z.ZodType<AbiTLBFieldDesc> = z.object({format: abiTLBType.optional(), name: z.string().optional(), optional: z.boolean().optional(), struct_fields: abiTLBFieldsDesc.optional(), tlb_type: z.string().optional()});

export const abiVmValueDesc = z.object({format: abiTLBType.optional(), name: z.string().optional(), stack_type: abiStackType.optional(), struct_fields: z.array(abiTLBFieldDesc).optional()});

export const abiGetMethodDesc = z.object({arguments: z.array(abiVmValueDesc).optional(), name: z.string().optional(), return_values: z.array(abiVmValueDesc).optional()});

export const abiOperationDesc = z.object({body: z.array(abiTLBFieldDesc).optional(), op_code: z.string().optional(), op_name: z.string().optional(), type: z.string().optional()});

export const coreContractOperation = z.object({contract_name: z.string().optional(), message_type: z.string().optional(), operation_id: z.number().int().optional(), operation_name: z.string().optional(), outgoing: z.boolean().optional(), schema: abiOperationDesc.optional()});

export const coreContractInterface = z.object({addresses: z.array(z.array(z.number().int())).optional(), code: z.array(z.number().int()).optional(), code_hash: z.array(z.number().int()).optional(), get_method_hashes: z.array(z.number().int()).optional(), get_methods_descriptors: z.array(abiGetMethodDesc).optional(), name: z.string().optional(), operations: z.array(coreContractOperation).optional()});

export const httpGetInterfacesRes = z.object({results: z.array(coreContractInterface).optional(), total: z.number().int().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
};

/**
 * contract interfaces
 * 
 * GET /contracts/interfaces
 */
export const getApiContractsInterfaces = async (options?: GetApiContractsInterfacesOptions) => {
const {baseUrl = "https://anton.tools/api/v0", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/contracts/interfaces${query.size > 0 ? `?${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(httpGetInterfacesRes, await res.json())
};