import {z} from 'zod'

export type RouteStep = {programId: string, dex: string, pool: string, inputMint: string, outputMint: string, amountIn: string, amountOut: string, feeAmount: string, priceImpact: number, percent?: number | undefined};

export type PriorityFeeLevels = {min?: number | undefined, low?: number | undefined, medium?: number | undefined, high?: number | undefined, veryHigh?: number | undefined, unsafeMax?: number | undefined};

export type PriorityFeeInfo = {recommended: number, level: string, levels?: PriorityFeeLevels | undefined};

export type PlatformFeeConfig = {feeBps: number, feeAccount: string};

export type QuoteResponse = {inputMint: string, outputMint: string, amountIn: string, amountOut: string, minAmountOut: string, feeAmount: string, priceImpact: number, slippageBps: number, routePlan: Array<RouteStep>, swapUsdValue?: string | undefined, priorityFee?: PriorityFeeInfo | undefined, platformFee?: PlatformFeeConfig | undefined, contextSlot: number, timeTaken: number};

export type SwapRequest = {userPublicKey: string, wrapUnwrapSol?: boolean | undefined, txVersion?: ('legacy' | 'v0') | undefined, computeUnitPriceMicroLamports?: number | undefined, computeUnitLimit?: number | undefined, priorityFee?: string | undefined, maxPriorityFee?: number | undefined, tipAccount?: string | undefined, tipLamports?: number | undefined, feeAccount?: string | undefined, feeBps?: number | undefined, feeFromInput?: boolean | undefined, chargeBps?: number | undefined, quoteResponse: QuoteResponse};

export type CreateApiSwapArgs = {body: SwapRequest};

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

export const swapResponse = z.object({swapTransaction: z.string(), lastValidBlockHeight: z.number().int(), contextSlot: z.number().int(), prioritizationFeeLamports: z.number().int()});

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
};

/**
 * Build swap transaction
 * 
 * POST /swap
 */
export const createApiSwap = async (args: CreateApiSwapArgs, options?: CreateApiSwapOptions) => {
const {baseUrl = "https://data.solanatracker.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 = `${baseUrl.replace(/\/+$/, '')}/swap${query.size > 0 ? `?${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(swapResponse, await res.json())
};