import {z} from 'zod'

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

export const tokenInfo = z.object({circulating_market_cap: z.string(), icon_url: z.string(), name: z.string(), decimals: z.string(), symbol: z.string(), address_hash: z.string().optional(), type: z.string(), holders_count: z.string().optional(), exchange_rate: z.string(), total_supply: z.string()});

export const addressTag = z.object({address_hash: z.string(), display_name: z.string(), label: z.string()});

export const watchlistName = z.object({display_name: z.string(), label: z.string()});

export const addressWithTxCount = z.object({creator_address_hash: z.string().optional(), creation_transaction_hash: z.string().optional(), token: tokenInfo.optional(), coin_balance: z.string().optional(), exchange_rate: z.string().optional(), implementation_address: z.string().optional(), block_number_balance_updated_at: z.number().int().optional(), hash: z.string(), implementation_name: z.string().optional(), name: z.string().optional(), is_contract: z.boolean().optional(), private_tags: z.array(addressTag).optional(), watchlist_names: z.array(watchlistName).optional(), public_tags: z.array(addressTag).optional(), is_verified: z.boolean().optional(), has_beacon_chain_withdrawals: z.boolean().optional(), has_logs: z.boolean().optional(), has_token_transfers: z.boolean().optional(), has_tokens: z.boolean().optional(), has_validated_blocks: z.boolean().optional(), creation_status: z.string().optional(), transactions_count: z.string()});

export const getApiAddressesResponse = z.object({exchange_rate: z.string(), total_supply: z.string(), items: z.array(addressWithTxCount), next_page_params: z.object({})});

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 native coin holders list
 * 
 * GET /addresses
 */
export const getApiAddresses = async (options?: GetApiAddressesOptions) => {
const {baseUrl = "https://eth.blockscout.com/api/v2", fetch: fetchFn = fetch} = options ?? {}

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

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