import {z} from 'zod'

export type GetApiEpochsNumberParametersArgs = {number: number};

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

export const epochParamContent = z.object({epoch: z.number().int(), min_fee_a: z.number().int(), min_fee_b: z.number().int(), max_block_size: z.number().int(), max_tx_size: z.number().int(), max_block_header_size: z.number().int(), key_deposit: z.string(), pool_deposit: z.string(), e_max: z.number().int(), n_opt: z.number().int(), a0: z.number(), rho: z.number(), tau: z.number(), decentralisation_param: z.number(), extra_entropy: z.string().nullable(), protocol_major_ver: z.number().int(), protocol_minor_ver: z.number().int(), min_utxo: z.string(), min_pool_cost: z.string(), nonce: z.string(), cost_models: z.record(z.string(), z.unknown()).nullable(), cost_models_raw: z.record(z.string(), z.unknown()).nullable().optional(), price_mem: z.number().nullable(), price_step: z.number().nullable(), max_tx_ex_mem: z.string().nullable(), max_tx_ex_steps: z.string().nullable(), max_block_ex_mem: z.string().nullable(), max_block_ex_steps: z.string().nullable(), max_val_size: z.string().nullable(), collateral_percent: z.number().int().nullable(), max_collateral_inputs: z.number().int().nullable(), coins_per_utxo_size: z.string().nullable(), coins_per_utxo_word: z.string().nullable(), pvt_motion_no_confidence: z.number().nullable(), pvt_committee_normal: z.number().nullable(), pvt_committee_no_confidence: z.number().nullable(), pvt_hard_fork_initiation: z.number().nullable(), dvt_motion_no_confidence: z.number().nullable(), dvt_committee_normal: z.number().nullable(), dvt_committee_no_confidence: z.number().nullable(), dvt_update_to_constitution: z.number().nullable(), dvt_hard_fork_initiation: z.number().nullable(), dvt_p_p_network_group: z.number().nullable(), dvt_p_p_economic_group: z.number().nullable(), dvt_p_p_technical_group: z.number().nullable(), dvt_p_p_gov_group: z.number().nullable(), dvt_treasury_withdrawal: z.number().nullable(), committee_min_size: z.string().nullable(), committee_max_term_length: z.string().nullable(), gov_action_lifetime: z.string().nullable(), gov_action_deposit: z.string().nullable(), drep_deposit: z.string().nullable(), drep_activity: z.string().nullable(), pvtpp_security_group: z.number().nullable(), pvt_p_p_security_group: z.number().nullable(), min_fee_ref_script_cost_per_byte: z.number().nullable()});

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
};

/**
 * Protocol parameters
 * 
 * GET /epochs/{number}/parameters
 */
export const getApiEpochsNumberParameters = async (args: GetApiEpochsNumberParametersArgs, options?: GetApiEpochsNumberParametersOptions) => {
const {baseUrl = "https://cardano-mainnet.blockfrost.io/api/v0", fetch: fetchFn = fetch, projectId} = options ?? {}

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

if (projectId !== undefined) headers.set("project_id", projectId)

const url = `${baseUrl.replace(/\/+$/, '')}/epochs/${encodeURIComponent(String(args.number))}/parameters${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(epochParamContent, await res.json())
};