import {z} from 'zod'

export type GetApiTradeQuoteArgs = {inputMint: string, outputMint: string, amount: number, slippageMode?: ('auto' | 'manual') | undefined, slippageBps?: number | undefined};

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

export const routePlanLeg = z.object({venue: z.string(), inAmount: z.string(), outAmount: z.string(), inputMint: z.string(), outputMint: z.string(), inputMintDecimals: z.number(), outputMintDecimals: z.number(), marketKey: z.string(), data: z.string()});

export const platformFee = z.object({amount: z.string(), feeBps: z.number(), feeAccount: z.string(), segmenterFeeAmount: z.string(), segmenterFeePct: z.number()});

export const getApiTradeQuoteResponse = z.object({success: z.boolean(), response: z.object({requestId: z.string(), contextSlot: z.number(), inAmount: z.string(), inputMint: z.string(), outAmount: z.string(), outputMint: z.string(), minOutAmount: z.string(), otherAmountThreshold: z.string(), priceImpactPct: z.string(), slippageBps: z.number(), routePlan: z.array(routePlanLeg), platformFee: platformFee.optional(), outTransferFee: z.string().nullable().optional(), simulatedComputeUnits: z.number().nullable().optional()}).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 trade quote
 * 
 * GET /trade/quote
 */
export const getApiTradeQuote = async (args: GetApiTradeQuoteArgs, options?: GetApiTradeQuoteOptions) => {
const {baseUrl = "https://public-api-v2.bags.fm/api/v1", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.inputMint != null) query.append("inputMint", String(args.inputMint))
if (args.outputMint != null) query.append("outputMint", String(args.outputMint))
if (args.amount != null) query.append("amount", String(args.amount))
if (args.slippageMode != null) query.append("slippageMode", String(args.slippageMode))
if (args.slippageBps != null) query.append("slippageBps", String(args.slippageBps))
if (ApiKeyAuth !== undefined) headers.set("x-api-key", ApiKeyAuth)

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