import {z} from 'zod'

export type GetApiV1FlowMarketBreadthArgs = {date?: string | undefined, fir_threshold?: number | undefined};

export type GetApiV1FlowMarketBreadthOptions = {baseUrl?: string | undefined, bearerApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const indexSentiment = z.object({ticker: z.string(), bullishPremium: z.number(), bearishPremium: z.number(), netPremium: z.number(), fir: z.number(), sentiment: z.enum(["strong_bullish", "bullish", "slightly_bullish", "neutral", "slightly_bearish", "bearish", "strong_bearish"])});

export const aggregateSentiment = z.object({combinedBullish: z.number(), combinedBearish: z.number(), combinedNetPremium: z.number(), combinedFir: z.number(), sentiment: z.enum(["strong_bullish", "bullish", "slightly_bullish", "neutral", "slightly_bearish", "bearish", "strong_bearish"])});

export const advanceDecline = z.object({advancing: z.number().int().gte(0), declining: z.number().int().gte(0), unchanged: z.number().int().gte(0), total: z.number().int().gte(0), ratio: z.number(), breadthPct: z.number(), marketAvgFir: z.number()});

export const sectorRotation = z.object({sector: z.string(), etf: z.string(), fir: z.number(), netPremium: z.number(), signal: z.enum(["strong_inflow", "inflow", "neutral", "outflow", "strong_outflow"])});

export const marketBreadthResponse = z.object({date: z.string(), majorIndices: z.array(indexSentiment), aggregateSentiment: aggregateSentiment, advanceDecline: advanceDecline, sectorRotation: z.array(sectorRotation)});

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

export const marketBreadthSuccess = z.object({data: marketBreadthResponse, 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
};

/**
 * Market-wide breadth, advance/decline, and sector rotation
 * 
 * GET /v1/flow/market-breadth
 */
export const getApiV1FlowMarketBreadth = async (args: GetApiV1FlowMarketBreadthArgs, options?: GetApiV1FlowMarketBreadthOptions) => {
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.date != null) query.append("date", String(args.date))
if (args.fir_threshold != null) query.append("fir_threshold", String(args.fir_threshold))
if (bearerApiKey !== undefined) headers.set('authorization', `Bearer ${bearerApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/flow/market-breadth${query.size > 0 ? `?${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(marketBreadthSuccess, await res.json())
};