import {z} from 'zod'

export type IntegerString = string;

export type GetApiChainIdApiV2CeloEpochsNumberArgs = {number: IntegerString, chain_id: string};

export type GetApiChainIdApiV2CeloEpochsNumberOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const integerString = z.string();

export const fullHashNullable = z.string().nullable();

export const timestampNullable = z.string().nullable();

export const celoEpochDetailed = z.object({aggregated_election_rewards: z.record(z.string(), z.object({count: z.number().int().gte(0), token: z.record(z.string(), z.unknown()).nullable(), total: integerString}).nullable()).nullable(), distribution: z.record(z.string(), z.unknown()).nullable(), end_block_number: z.number().int().gte(0), end_processing_block_hash: fullHashNullable, end_processing_block_number: z.number().int().gte(0).nullable(), is_finalized: z.boolean(), number: z.number().int().gte(0), start_block_number: z.number().int().gte(0), start_processing_block_hash: fullHashNullable, start_processing_block_number: z.number().int().gte(0).nullable(), timestamp: timestampNullable, type: z.enum(["L1", "L2"])});

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
};

/**
 * Get Celo epoch details.
 * 
 * GET /{chain_id}/api/v2/celo/epochs/{number}
 * 
 * Also accepts auth: apiKeyAuth
 */
export const getApiChainIdApiV2CeloEpochsNumber = async (args: GetApiChainIdApiV2CeloEpochsNumberArgs, options?: GetApiChainIdApiV2CeloEpochsNumberOptions) => {
const {baseUrl = "https://api.blockscout.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.chain_id))}/api/v2/celo/epochs/${encodeURIComponent(String(args.number))}${query.size > 0 ? `?${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(celoEpochDetailed, await res.json())
};