import {z} from 'zod'

export type GetApiQuoteArgs = {inputMint: string, outputMint: string, amount: number, slippageBps?: string | undefined, dexes?: string | undefined, pools?: string | undefined, maxHops?: number | undefined, feeBps?: number | undefined, feeFromInput?: boolean | undefined, chargeBps?: number | undefined, feeAccount?: string | undefined};

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

export const routeStep = z.object({programId: z.string(), dex: z.string(), pool: z.string(), inputMint: z.string(), outputMint: z.string(), amountIn: z.string(), amountOut: z.string(), feeAmount: z.string(), priceImpact: z.number(), percent: z.number().int().optional()});

export const priorityFeeLevels = z.object({min: z.number().int().optional(), low: z.number().int().optional(), medium: z.number().int().optional(), high: z.number().int().optional(), veryHigh: z.number().int().optional(), unsafeMax: z.number().int().optional()});

export const priorityFeeInfo = z.object({recommended: z.number().int(), level: z.string(), levels: priorityFeeLevels.optional()});

export const platformFeeConfig = z.object({feeBps: z.number().int(), feeAccount: z.string()});

export const quoteResponse = z.object({inputMint: z.string(), outputMint: z.string(), amountIn: z.string(), amountOut: z.string(), minAmountOut: z.string(), feeAmount: z.string(), priceImpact: z.number(), slippageBps: z.number().int(), routePlan: z.array(routeStep), swapUsdValue: z.string().optional(), priorityFee: priorityFeeInfo.optional(), platformFee: platformFeeConfig.optional(), contextSlot: z.number().int(), timeTaken: z.number()});

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 swap quote
 * 
 * GET /quote
 */
export const getApiQuote = async (args: GetApiQuoteArgs, options?: GetApiQuoteOptions) => {
const {baseUrl = "https://data.solanatracker.io", fetch: fetchFn = fetch, apiKey} = 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.slippageBps != null) query.append("slippageBps", String(args.slippageBps))
if (args.dexes != null) query.append("dexes", String(args.dexes))
if (args.pools != null) query.append("pools", String(args.pools))
if (args.maxHops != null) query.append("maxHops", String(args.maxHops))
if (args.feeBps != null) query.append("feeBps", String(args.feeBps))
if (args.feeFromInput != null) query.append("feeFromInput", String(args.feeFromInput))
if (args.chargeBps != null) query.append("chargeBps", String(args.chargeBps))
if (args.feeAccount != null) query.append("feeAccount", String(args.feeAccount))
if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/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(quoteResponse, await res.json())
};