import {z} from 'zod'

export type GetApiBlockSearchArgs = {query: string, page?: number | undefined, per_page?: number | undefined, order_by?: string | undefined};

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

export const event = z.object({key: z.string().optional(), value: z.string().optional(), index: z.boolean().optional()});

export const consensusParams = z.object({block: z.object({max_bytes: z.string(), max_gas: z.string(), time_iota_ms: z.string()}), evidence: z.object({max_age_num_blocks: z.string(), max_age_duration: z.string()}), validator: z.object({pub_key_types: z.array(z.string())})}).nullable();

export const blockResultsResponse = z.object({jsonrpc: z.string(), id: z.number().int(), result: z.object({height: z.string(), txs_results: z.array(z.object({code: z.string().optional(), data: z.string().optional(), log: z.string().optional(), info: z.string().optional(), gas_wanted: z.string().optional(), gas_used: z.string().optional(), events: z.array(z.object({type: z.string().optional(), attributes: z.array(event).optional()})).nullable().optional(), codespace: z.string().optional()})).nullable().optional(), begin_block_events: z.array(z.object({type: z.string().optional(), attributes: z.array(event).optional()})).nullable().optional(), end_block: z.array(z.object({type: z.string().optional(), attributes: z.array(event).optional()})).nullable().optional(), validator_updates: z.array(z.object({pub_key: z.object({type: z.string(), value: z.string()}).optional(), power: z.string().optional()})).nullable().optional(), consensus_params_updates: consensusParams.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
};

/**
 * Search for blocks by BeginBlock and EndBlock events
 * 
 * GET /block_search
 */
export const getApiBlockSearch = async (args: GetApiBlockSearchArgs, options?: GetApiBlockSearchOptions) => {
const {baseUrl = "http://localhost:26657", fetch: fetchFn = fetch} = options ?? {}

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

if (args.query != null) query.append("query", String(args.query))
if (args.page != null) query.append("page", String(args.page))
if (args.per_page != null) query.append("per_page", String(args.per_page))
if (args.order_by != null) query.append("order_by", String(args.order_by))

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