import {z} from 'zod'

export type V1Chain = string;

export type V1Account = {account_id: string, account_creation_timestamp?: string | undefined, user_age?: number | undefined, user_country_code?: string | undefined, account_addresses?: Array<string> | undefined};

export type V1Connection = {user_agent?: string | undefined, ip_address: unknown, origin?: string | undefined, walletconnect_name?: string | undefined, walletconnect_description?: string | undefined};

export type V1ScanRequestMetadata = {account?: V1Account | undefined, connection?: V1Connection | undefined};

export type V1ExchangeWithdrawalScanRequest = {format: 'EXCHANGE_WITHDRAWAL', chain: V1Chain, withdrawing_account: string, to: string, asset?: (string | null) | undefined, amount?: (string | null) | undefined, metadata?: V1ScanRequestMetadata | undefined};

export type V1ExchangeDepositScanRequest = {format: 'EXCHANGE_DEPOSIT', chain: V1Chain, depositor_address: string, to: string, asset?: (string | null) | undefined, amount?: (string | null) | undefined, metadata?: V1ScanRequestMetadata | undefined};

export type V1TransactionScanRequest = V1ExchangeWithdrawalScanRequest | V1ExchangeDepositScanRequest;

export type CreateApiV1TransactionScanArgs = {body: V1TransactionScanRequest};

export type CreateApiV1TransactionScanOptions = {baseUrl?: string | undefined, APIKey?: string | undefined, fetch?: typeof fetch | undefined};

export const v1EntityType = z.enum(["TOKEN", "ADDRESS", "TRANSACTION", "SIGNATURE", "WEBSITE"]);

export const v1Chain = z.string();

export const v1ExchangeWithdrawalDetails = z.object({format: z.literal("EXCHANGE_WITHDRAWAL"), chain: v1Chain, withdrawing_account: z.string(), to: z.string(), asset: z.string().nullable().optional(), amount: z.string().nullable().optional()});

export const v1ExchangeDepositDetails = z.object({format: z.literal("EXCHANGE_DEPOSIT"), chain: v1Chain, depositor_address: z.string(), to: z.string(), asset: z.string().nullable().optional(), amount: z.string().nullable().optional()});

export const v1TransactionMetadataDetails = z.discriminatedUnion("format", [v1ExchangeWithdrawalDetails, v1ExchangeDepositDetails]);

export const v1TransactionMetadata = z.object({entity_type: v1EntityType, details: v1TransactionMetadataDetails});

export const v1RiskSeverityLevel = z.enum(["none", "low", "medium", "high", "critical"]);

export const v1Severity = z.object({level: v1RiskSeverityLevel, score: z.number().int().gte(0).lte(100)});

export const v1Profile = z.object({id: z.string()});

export const v1Proximity = z.enum(["ownership", "counterparty", "indirect"]);

export const v1Evidence = z.record(z.string(), z.unknown());

export const v1Signal = z.object({id: z.string(), name: z.string(), description: z.string(), evidence: v1Evidence});

export const v1NegativeCategory = z.object({category: z.string(), proximity: v1Proximity.optional(), name: z.string(), description: z.string(), signals: z.array(v1Signal)});

export const v1PositiveCategory = z.object({category: z.string(), name: z.string(), description: z.string(), signals: z.array(v1Signal)});

export const v1Risk = z.object({severity: v1Severity, profile: v1Profile, negative_categories: z.array(v1NegativeCategory), positive_categories: z.array(v1PositiveCategory)});

export const v1TransactionScanResponse = z.object({request_id: z.string(), metadata: v1TransactionMetadata, risk: v1Risk});

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
};

/**
 * Scan a transaction
 * 
 * POST /v1/transaction/scan
 * 
 * Also accepts auth: ClientID
 */
export const createApiV1TransactionScan = async (args: CreateApiV1TransactionScanArgs, options?: CreateApiV1TransactionScanOptions) => {
const {baseUrl = "https://api.blockaid.io", fetch: fetchFn = fetch, APIKey} = options ?? {}

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

if (APIKey !== undefined) headers.set("X-API-Key", APIKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/transaction/scan${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(v1TransactionScanResponse, await res.json())
};