import {z} from 'zod'

export type DateTruncUnit = 'year' | 'month' | 'week' | 'day' | 'hour' | 'minute' | 'second';

export type DatePartUnit = 'year' | 'month' | 'week' | 'day' | 'dayOfWeek' | 'dayOfYear' | 'hour' | 'minute' | 'second';

export type GroupByField = {field: string, alias?: (string | null) | undefined, date_trunc?: (DateTruncUnit | null) | undefined, date_part?: (DatePartUnit | null) | undefined};

export type AggregationFunction = 'count' | 'count_distinct' | 'sum' | 'avg' | 'min' | 'max' | 'first' | 'last' | 'push' | 'add_to_set';

export type AggregationOperation = {function: AggregationFunction, field?: (string | null) | undefined, alias: string, distinct_field?: (string | null) | undefined};

export type HavingCondition = {field: string, operator: string, value: number | number | string};

export type RangeBucket = {field: string, boundaries: Array<number | number>, default_bucket?: (string | null) | undefined};

export type DocumentAggregationRequest = {group_by?: Array<GroupByField> | undefined, aggregations: Array<AggregationOperation>, filters?: ({[key: string]: unknown} | null) | undefined, having?: (Array<HavingCondition> | null) | undefined, unwind?: (string | null) | undefined, range_buckets?: (Array<RangeBucket> | null) | undefined, sort_by?: (string | null) | undefined, sort_direction?: string | undefined, limit?: (number | null) | undefined};

export type CreateApiV1CollectionsCollectionIdentifierDocumentsAggregateArgs = {collection_identifier: string, body: DocumentAggregationRequest};

export type CreateApiV1CollectionsCollectionIdentifierDocumentsAggregateOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, NamespaceHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const aggregationResult = z.object({group: z.record(z.string(), z.unknown()), metrics: z.record(z.string(), z.unknown())});

export const documentAggregationResponse = z.object({results: z.array(aggregationResult), total_groups: z.number().int(), query_info: z.record(z.string(), z.unknown()).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
};

/**
 * Aggregate Documents
 * 
 * POST /v1/collections/{collection_identifier}/documents/aggregate
 */
export const createApiV1CollectionsCollectionIdentifierDocumentsAggregate = async (args: CreateApiV1CollectionsCollectionIdentifierDocumentsAggregateArgs, options?: CreateApiV1CollectionsCollectionIdentifierDocumentsAggregateOptions) => {
const {baseUrl = "https://api.mixpeek.com", fetch: fetchFn = fetch, BearerAuth, NamespaceHeader} = options ?? {}

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

if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)
if (NamespaceHeader !== undefined) headers.set("X-Namespace", NamespaceHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/collections/${encodeURIComponent(String(args.collection_identifier))}/documents/aggregate${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(documentAggregationResponse, await res.json())
};