import {z} from 'zod'

export type GetApiInstructionsMmmSolFulfillBuyArgs = {pool: string, assetAmount: number, minPaymentAmount: number, seller: string, assetMint: string, assetTokenAccount: string, allowlistAuxAccount?: string | undefined, skipDelist?: boolean | undefined, priorityFee?: number | undefined};

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

export const iBuffer = z.object({type: z.literal("Buffer"), data: z.array(z.number())});

export const transaction = z.object({tx: iBuffer, txSigned: iBuffer.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 instruction to have a pool fulfill a buy
 * 
 * GET /instructions/mmm/sol-fulfill-buy
 */
export const getApiInstructionsMmmSolFulfillBuy = async (args: GetApiInstructionsMmmSolFulfillBuyArgs, options?: GetApiInstructionsMmmSolFulfillBuyOptions) => {
const {baseUrl = "https://api-mainnet.magiceden.dev/v2", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.pool != null) query.append("pool", String(args.pool))
if (args.assetAmount != null) query.append("assetAmount", String(args.assetAmount))
if (args.minPaymentAmount != null) query.append("minPaymentAmount", String(args.minPaymentAmount))
if (args.seller != null) query.append("seller", String(args.seller))
if (args.assetMint != null) query.append("assetMint", String(args.assetMint))
if (args.assetTokenAccount != null) query.append("assetTokenAccount", String(args.assetTokenAccount))
if (args.allowlistAuxAccount != null) query.append("allowlistAuxAccount", String(args.allowlistAuxAccount))
if (args.skipDelist != null) query.append("skipDelist", String(args.skipDelist))
if (args.priorityFee != null) query.append("priorityFee", String(args.priorityFee))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/instructions/mmm/sol-fulfill-buy${query.size > 0 ? `?${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(transaction, await res.json())
};