import {z} from 'zod'

export type SharedFilterCondition = {field?: string | undefined, operator?: ('equals' | 'not_equals' | 'contains' | 'not_contains' | 'in' | 'not_in') | undefined, value?: string | undefined, values?: Array<string> | undefined};

export type TypesLogicalOperator = 'AND' | 'OR';

export type RequestGetMetricsRequest = {from_timestamp_sec?: number | undefined, to_timestamp_sec?: number | undefined, cursor?: number | undefined, environments?: Array<string> | undefined, filters?: Array<SharedFilterCondition> | undefined, limit?: number | undefined, logical_operator?: TypesLogicalOperator | undefined, metric_name?: string | undefined, metric_source?: string | undefined, sort_by?: string | undefined, sort_order?: string | undefined};

export type CreateApiV2MetricsArgs = {body: RequestGetMetricsRequest};

export type CreateApiV2MetricsOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const responseMetricPoint = z.object({bool_value: z.boolean().optional(), enum_value: z.string().optional(), numeric_value: z.number().optional(), event_time: z.number().int().optional(), labels: z.record(z.string(), z.string()).optional()});

export const responseMetricGroup = z.object({metric_name: z.string().optional(), organization_id: z.string().optional(), points: z.array(responseMetricPoint).optional()});

export const responsePaginatedMetricsResponse = z.object({data: z.array(responseMetricGroup).optional(), next_cursor: z.string().optional(), total_points: z.number().int().optional(), total_results: z.number().int().optional()});

export const responseGetMetricsResponse = z.object({metrics: responsePaginatedMetricsResponse.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 metrics with filtering and grouping
 * 
 * POST /v2/metrics
 */
export const createApiV2Metrics = async (args: CreateApiV2MetricsArgs, options?: CreateApiV2MetricsOptions) => {
const {baseUrl = "https://api.traceloop.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v2/metrics${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(responseGetMetricsResponse, await res.json())
};