import {z} from 'zod'

export type GetApiTechnicalIndicatorsOptions = {baseUrl?: string | undefined, authorizationHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const technicalIndicatorsResponseMacdOutputValue = z.object({default_color: z.string().optional(), display: z.enum(["line", "histogram", "candle", "points"]).optional(), min_range: z.number().int().optional(), max_range: z.number().int().optional()});

export const technicalIndicatorsResponseMacdOutputValues = z.object({parameter_name: technicalIndicatorsResponseMacdOutputValue.optional()});

export const technicalIndicatorsResponseMacdParameter = z.object({default: z.number().int().optional(), max_range: z.number().int().optional(), min_range: z.number().int().optional(), range: z.array(z.string()).optional(), type: z.string().optional()});

export const technicalIndicatorsResponseMacdParameters = z.object({parameter_name: technicalIndicatorsResponseMacdParameter.optional()});

export const technicalIndicatorsResponseMacdTinting = z.object({display: z.string().optional(), color: z.string().optional(), transparency: z.number().optional(), lower_bound: z.string().optional(), upper_bound: z.string().optional()});

export const getApiTechnicalIndicatorsResponse = z.object({data: z.record(z.string(), z.object({enable: z.boolean(), full_name: z.string(), description: z.string(), type: z.string(), overlay: z.boolean(), output_values: technicalIndicatorsResponseMacdOutputValues.optional(), parameters: technicalIndicatorsResponseMacdParameters.optional(), tinting: technicalIndicatorsResponseMacdTinting.optional()})), status: z.string()});

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
};

/**
 * Technical indicators
 * 
 * GET /technical_indicators
 * 
 * Also accepts auth: queryParameter
 */
export const getApiTechnicalIndicators = async (options?: GetApiTechnicalIndicatorsOptions) => {
const {baseUrl = "https://api.twelvedata.com", fetch: fetchFn = fetch, authorizationHeader} = options ?? {}

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

if (authorizationHeader !== undefined) headers.set("Authorization", authorizationHeader)

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