import {z} from 'zod'

export type GetApiBlocksArgs = {lowHash: string, includeBlocks?: boolean | undefined, includeTransactions?: boolean | undefined};

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

export const parentHashModel = z.object({parentHashes: z.array(z.string()).optional()});

export const endpointsGetBlocksBlockHeader = z.object({version: z.number().int().optional(), hashMerkleRoot: z.string().optional(), acceptedIdMerkleRoot: z.string().optional(), utxoCommitment: z.string().optional(), timestamp: z.string().optional(), bits: z.number().int().optional(), nonce: z.string().optional(), daaScore: z.string().optional(), blueWork: z.string().optional(), parents: z.array(parentHashModel).optional(), blueScore: z.string().optional(), pruningPoint: z.string().optional()});

export const blockTxInputPreviousOutpointModel = z.object({transactionId: z.string(), index: z.number().int()});

export const blockTxInputModel = z.object({previousOutpoint: blockTxInputPreviousOutpointModel.optional(), signatureScript: z.string().optional(), sigOpCount: z.number().int().optional(), sequence: z.number().int().optional(), computeBudget: z.number().int().optional()});

export const blockTxOutputScriptPublicKeyModel = z.object({scriptPublicKey: z.string().optional(), version: z.number().int().optional()});

export const blockTxOutputVerboseDataModel = z.object({scriptPublicKeyType: z.string().optional(), scriptPublicKeyAddress: z.string().optional()});

export const blockTxOutputCovenantModel = z.object({authorizingInput: z.number().int().optional(), covenantId: z.string().optional()});

export const blockTxOutputModel = z.object({amount: z.number().int().optional(), scriptPublicKey: blockTxOutputScriptPublicKeyModel.optional(), verboseData: blockTxOutputVerboseDataModel.optional(), covenant: blockTxOutputCovenantModel.optional()});

export const blockTxVerboseDataModel = z.object({transactionId: z.string(), hash: z.string().optional(), computeMass: z.number().int().optional(), blockHash: z.string().optional(), blockTime: z.number().int().optional()});

export const blockTxModel = z.object({inputs: z.array(blockTxInputModel).optional(), outputs: z.array(blockTxOutputModel).optional(), subnetworkId: z.string().optional(), payload: z.string().optional(), verboseData: blockTxVerboseDataModel, lockTime: z.number().int().optional(), gas: z.number().int().optional(), mass: z.number().int().optional(), version: z.number().int().optional()});

export const verboseDataModel = z.object({hash: z.string().optional(), difficulty: z.number().optional(), selectedParentHash: z.string().optional(), transactionIds: z.array(z.string()).optional(), blueScore: z.string().optional(), childrenHashes: z.array(z.string()).optional(), mergeSetBluesHashes: z.array(z.string()).optional(), mergeSetRedsHashes: z.array(z.string()).optional(), isChainBlock: z.boolean().optional()});

export const extraModel = z.object({color: z.string().optional(), minerAddress: z.string().optional(), minerInfo: z.string().optional()});

export const blockModel = z.object({header: endpointsGetBlocksBlockHeader, transactions: z.array(blockTxModel).optional(), verboseData: verboseDataModel, extra: extraModel.optional()});

export const blockResponse = z.object({blockHashes: z.array(z.string()).optional(), blocks: z.array(blockModel).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
};

/**
 * Get Blocks
 * 
 * GET /blocks
 */
export const getApiBlocks = async (args: GetApiBlocksArgs, options: GetApiBlocksOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.lowHash != null) query.append("lowHash", String(args.lowHash))
if (args.includeBlocks != null) query.append("includeBlocks", String(args.includeBlocks))
if (args.includeTransactions != null) query.append("includeTransactions", String(args.includeTransactions))

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