import {z} from 'zod'

export type MetricAggregation = 'count' | 'count_distinct' | 'sum' | 'avg' | 'min' | 'max' | 'p50' | 'p90' | 'p95' | 'p99';

export type MetricDefinition = {measure: string, aggregation: MetricAggregation};

export type Granularity = 'auto' | 'second' | 'minute' | 'hour' | 'day' | 'week' | 'month';

export type TimeDimension = {granularity?: Granularity | undefined};

export type OrderByClause = {field: string, direction?: ('asc' | 'desc') | undefined};

export type AggregationRequest = {metric: MetricDefinition, dimensions?: Array<string> | undefined, time_dimension?: (TimeDimension | null) | undefined, search_expression?: (string | null) | undefined, order_by?: (Array<OrderByClause> | null) | undefined, limit?: number | undefined};

export type CreateApiV1ObservabilityTracesAggregateArgs = {from?: (string | null) | undefined, to?: (string | null) | undefined, body: AggregationRequest};

export type CreateApiV1ObservabilityTracesAggregateOptions = {baseUrl?: string | undefined, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const aggregationRow = z.object({time_bucket: z.string().nullable().optional(), dimensions: z.record(z.string(), z.unknown()).optional(), metric_name: z.string(), metric_value: z.union([z.number(), z.number().int()]).nullable().optional()});

export const aggregationMeta = z.object({from_timestamp: z.string(), to_timestamp: z.string(), granularity_seconds: z.number().int().nullable().optional()});

export const aggregation = z.object({data: z.array(aggregationRow), meta: aggregationMeta});

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
};

/**
 * Aggregate traces
 * 
 * POST /v1/observability/traces/aggregate
 */
export const createApiV1ObservabilityTracesAggregate = async (args: CreateApiV1ObservabilityTracesAggregateArgs, options?: CreateApiV1ObservabilityTracesAggregateOptions) => {
const {baseUrl = "https://api.mistral.ai", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))
if (ApiKey !== undefined) headers.set('authorization', `Bearer ${ApiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/observability/traces/aggregate${query.size > 0 ? `?${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(aggregation, await res.json())
};