import {z} from 'zod'

export type GetApiV1FlowTickerStrikesArgs = {ticker: string, start_time: string, end_time: string, top_n?: number | undefined, right?: ('call' | 'put') | undefined, min_premium?: number | undefined, order_by?: ('net_premium' | 'total_premium' | 'volume') | undefined, min_dte?: number | undefined, max_dte?: number | undefined};

export type GetApiV1FlowTickerStrikesOptions = {baseUrl?: string | undefined, bearerApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const strikeBreakdown = z.object({strike: z.number(), right: z.enum(["C", "P"]), dominantExpiration: z.string(), tradeCount: z.number().int().gte(0), volume: z.number().int().gte(0), totalPremium: z.number(), bullishPremium: z.number(), bearishPremium: z.number(), netPremium: z.number(), askPct: z.number(), bidPct: z.number(), openInterest: z.number().int().gte(0), volOiRatio: z.number()});

export const strikesConcentration = z.object({top3StrikesShare: z.number(), top3StrikesNetPremium: z.number(), interpretation: z.string()});

export const strikesResponse = z.object({ticker: z.string(), startTime: z.string(), endTime: z.string(), byStrike: z.array(strikeBreakdown), concentration: strikesConcentration});

export const meta = z.object({timestamp: z.string(), requestId: z.string()});

export const strikesSuccess = z.object({data: strikesResponse, meta: meta});

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
};

/**
 * Strike-level flow concentration
 * 
 * GET /v1/flow/{ticker}/strikes
 */
export const getApiV1FlowTickerStrikes = async (args: GetApiV1FlowTickerStrikesArgs, options?: GetApiV1FlowTickerStrikesOptions) => {
const {baseUrl = "https://flow-api.skylit.ai", fetch: fetchFn = fetch, bearerApiKey} = options ?? {}

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

if (args.start_time != null) query.append("start_time", String(args.start_time))
if (args.end_time != null) query.append("end_time", String(args.end_time))
if (args.top_n != null) query.append("top_n", String(args.top_n))
if (args.right != null) query.append("right", String(args.right))
if (args.min_premium != null) query.append("min_premium", String(args.min_premium))
if (args.order_by != null) query.append("order_by", String(args.order_by))
if (args.min_dte != null) query.append("min_dte", String(args.min_dte))
if (args.max_dte != null) query.append("max_dte", String(args.max_dte))
if (bearerApiKey !== undefined) headers.set('authorization', `Bearer ${bearerApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/flow/${encodeURIComponent(String(args.ticker))}/strikes${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(strikesSuccess, await res.json())
};