import {z} from 'zod'

export type CreateApiGetBlockHeaderStateArgs = {body: {block_num_or_id: string}};

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

export const dateTimeSeconds = z.string();

export const emptyString = z.string();

export const namePrivileged = z.string();

export const nameBasic = z.string();

export const nameBid = z.string();

export const nameCatchAll = z.string();

export const name = z.union([namePrivileged, nameBasic, nameBid, nameCatchAll]);

export const sha256 = z.string();

export const producerAuthorityList = z.array(z.object({threshold: z.number().int().optional(), keys: z.array(z.object({key: z.string().optional(), weight: z.number().int().optional()})).optional()}));

export const producerSchedule = z.object({version: z.number().int().optional(), producers: z.array(z.object({producer_name: z.string().optional(), authority: producerAuthorityList.optional()})).optional()});

export const extension = z.array(z.union([z.number().int(), z.string()]));

export const signature = z.string();

export const dateTime = z.string();

export const wholeNumber = z.union([z.string(), z.number().int()]);

export const authority = z.object({actor: name, permission: name});

export const action = z.object({account: name, name: name, authorization: z.array(authority), data: z.record(z.string(), z.unknown()), hex_data: z.string()});

export const transaction = z.object({expiration: dateTime, ref_block_num: z.number().int(), ref_block_prefix: z.number().int(), max_net_usage_words: wholeNumber, max_cpu_usage_ms: wholeNumber, delay_sec: z.number().int(), context_free_actions: z.array(action), actions: z.array(action), transaction_extensions: z.array(extension).optional()});

export const packedTransaction = z.object({id: sha256, signatures: z.array(signature), compression: z.string(), packed_context_free_data: z.string(), context_free_data: z.array(z.string()), packed_trx: z.string(), transaction: transaction});

export const transactionVariant = z.union([sha256, packedTransaction]);

export const transactionReceipt = z.object({status: z.enum(["executed", "soft_fail", "hard_fail", "delayed", "expired"]), cpu_usage_us: z.number().int(), net_usage_words: z.number().int(), trx: transactionVariant});

export const block = z.object({timestamp: dateTimeSeconds, producer: z.union([emptyString, name]), confirmed: z.number().int(), previous: sha256, transaction_mroot: sha256, action_mroot: sha256, schedule_version: z.number().int(), new_producers: producerSchedule, header_extensions: extension.optional(), new_protocol_features: z.array(z.object({})).optional(), producer_signature: signature, transactions: z.array(transactionReceipt).optional(), block_extensions: extension.optional(), id: sha256.optional(), block_num: z.number().int().optional(), ref_block_prefix: z.number().int().optional()});

export const blockrootMerkle = z.object({_active_nodes: z.array(sha256), _node_count: wholeNumber});

export const publicKey = z.string();

export const blockHeaderState = z.object({id: z.string(), block_num: z.number().int(), header: block, dpos_proposed_irreversible_blocknum: wholeNumber, dpos_irreversible_blocknum: wholeNumber, bft_irreversible_blocknum: wholeNumber, pending_schedule_lib_num: wholeNumber, pending_schedule_hash: sha256, pending_schedule: producerSchedule, active_schedule: producerSchedule, blockroot_merkle: blockrootMerkle, producer_to_last_produced: z.array(z.array(z.union([name, wholeNumber]))), producer_to_last_implied_irb: z.array(z.array(z.union([name, wholeNumber]))), block_signing_key: publicKey, confirm_count: z.array(wholeNumber), confirmations: z.array(z.unknown())});

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
};

/**
 * Retrieves the glock header state
 * 
 * POST /get_block_header_state
 */
export const createApiGetBlockHeaderState = async (args: CreateApiGetBlockHeaderStateArgs, options?: CreateApiGetBlockHeaderStateOptions) => {
const {baseUrl = "https://wax.greymass.com/v1/chain", fetch: fetchFn = fetch} = options ?? {}

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

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