import {z} from 'zod'

export type PermitDepositPrepareRequest = {account: string, sourceChain: string, token: string, amount: string, owner: string, kind?: ('auto' | 'erc3009' | 'erc2612' | 'permit2') | undefined};

export type CreateApiDepositsPermitPrepareArgs = {'x-api-key'?: string | undefined, body: PermitDepositPrepareRequest};

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

export const permitTypedData = z.object({domain: z.unknown(), types: z.unknown(), primaryType: z.string(), message: z.unknown()});

export const permitDepositPrepareResponse = z.union([z.object({available: z.literal(true), authorization: z.union([z.object({kind: z.literal("erc3009"), typedData: permitTypedData, nonce: z.string(), validAfter: z.string(), validBefore: z.string()}), z.object({kind: z.enum(["erc2612", "permit2"]), typedData: permitTypedData, nonce: z.string(), deadline: z.string()})])}), z.object({available: z.literal(false), reason: z.enum(["permit2-approval-required", "unsupported-token", "unsupported-owner"]), approval: z.object({token: z.string(), spender: z.string(), minimumAmount: z.string()}).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
};

/**
 * Prepare a gasless deposit
 * 
 * POST /deposits/permit/prepare
 * 
 * Also accepts auth: internalProjectBearer
 */
export const createApiDepositsPermitPrepare = async (args: CreateApiDepositsPermitPrepareArgs, options?: CreateApiDepositsPermitPrepareOptions) => {
const {baseUrl = "https://v1.orchestrator.rhinestone.dev/deposit-processor", fetch: fetchFn = fetch, tenantApiKey} = options ?? {}

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

if (args['x-api-key'] != null) headers.set("x-api-key", String(args['x-api-key']))
if (tenantApiKey !== undefined) headers.set("x-api-key", tenantApiKey)

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