import {z} from 'zod'

export type GetApiApiOrgIdExperimentsCompareArgs = {org_id: string, baselineId: string, candidateId: string, threshold?: (number | null) | undefined, outcomeDimensions?: (string | null) | undefined};

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

export const experimentComparisonCountsBody = z.object({baselineRows: z.number().int().gte(0), candidateRows: z.number().int().gte(0), commonRows: z.number().int().gte(0), improved: z.number().int().gte(0), inconclusive: z.number().int().gte(0), missing: z.number().int().gte(0), new: z.number().int().gte(0), regressed: z.number().int().gte(0), unchanged: z.number().int().gte(0)});

export const experimentComparisonAssignmentBody = z.enum(["regressed", "improved", "unchanged", "descriptive", "baseline_only", "candidate_only", "unavailable"]);

export const experimentComparisonScoreDataTypeBody = z.enum(["numeric", "categorical", "boolean"]);

export const experimentComparisonDimensionKindBody = z.enum(["score", "cost", "latency"]);

export const experimentComparisonSummaryDimensionBody = z.object({assignment: experimentComparisonAssignmentBody, baseline: z.number().nullable().optional(), baselineLabel: z.string().nullable().optional(), baselineOnlyRowCount: z.number().int().gte(0), baselineSampleCount: z.number().int().gte(0), canAffectOutcome: z.boolean(), candidate: z.number().nullable().optional(), candidateLabel: z.string().nullable().optional(), candidateOnlyRowCount: z.number().int().gte(0), candidateSampleCount: z.number().int().gte(0), comparableRowCount: z.number().int().gte(0), dataType: experimentComparisonScoreDataTypeBody.nullable().optional(), delta: z.number().nullable().optional(), gating: z.boolean(), id: z.string(), kind: experimentComparisonDimensionKindBody, name: z.string(), normalized: z.boolean(), orientedDelta: z.number().nullable().optional(), scoreConfigId: z.string().nullable().optional(), scoreConfigName: z.string().nullable().optional(), scoreConfigVersion: z.string().nullable().optional()});

export const experimentComparisonBucketBody = z.enum(["regressed", "improved", "unchanged", "inconclusive", "new", "missing"]);

export const experimentComparisonDimensionBody = z.object({assignment: experimentComparisonAssignmentBody, baseline: z.number().nullable().optional(), baselineDispersion: z.number().nullable().optional(), baselineLabel: z.string().nullable().optional(), baselineSampleCount: z.number().int().gte(0), canAffectOutcome: z.boolean(), candidate: z.number().nullable().optional(), candidateDispersion: z.number().nullable().optional(), candidateLabel: z.string().nullable().optional(), candidateSampleCount: z.number().int().gte(0), dataType: experimentComparisonScoreDataTypeBody.nullable().optional(), delta: z.number().nullable().optional(), gating: z.boolean(), id: z.string(), kind: experimentComparisonDimensionKindBody, name: z.string(), normalized: z.boolean(), orientedDelta: z.number().nullable().optional(), scoreConfigId: z.string().nullable().optional(), scoreConfigName: z.string().nullable().optional(), scoreConfigVersion: z.string().nullable().optional(), withinNoise: z.boolean()});

export const experimentComparisonTrialBody = z.object({baselineOutput: z.unknown(), candidateOutput: z.unknown(), trialIndex: z.number().int().gte(0)});

export const experimentComparisonRowBody = z.object({baselineRowId: z.string().nullable().optional(), bucket: experimentComparisonBucketBody, candidateRowId: z.string().nullable().optional(), dimensions: z.array(experimentComparisonDimensionBody), input: z.unknown(), logicalId: z.string(), trials: z.array(experimentComparisonTrialBody)});

export const experimentComparisonResponseBody = z.object({assignmentRule: z.string(), baselineId: z.string(), baselineScoringStatus: z.string(), candidateId: z.string(), candidateScoringStatus: z.string(), counts: experimentComparisonCountsBody, datasetId: z.string(), dimensions: z.array(experimentComparisonSummaryDimensionBody), outcomeDimensions: z.array(z.string()), partial: z.boolean(), rows: z.array(experimentComparisonRowBody), threshold: z.number()});

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
};

/**
 * Compare two Experiments over the honest intersection of their pinned rows.
 * 
 * GET /api/{org_id}/experiments/compare
 */
export const getApiApiOrgIdExperimentsCompare = async (args: GetApiApiOrgIdExperimentsCompareArgs, options: GetApiApiOrgIdExperimentsCompareOptions) => {
const {baseUrl, fetch: fetchFn = fetch, Authorization} = options ?? {}

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

if (args.baselineId != null) query.append("baselineId", String(args.baselineId))
if (args.candidateId != null) query.append("candidateId", String(args.candidateId))
if (args.threshold != null) query.append("threshold", String(args.threshold))
if (args.outcomeDimensions != null) query.append("outcomeDimensions", String(args.outcomeDimensions))
if (Authorization !== undefined) headers.set("Authorization", Authorization)

const url = `${baseUrl.replace(/\/+$/, '')}/api/${encodeURIComponent(String(args.org_id))}/experiments/compare${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(experimentComparisonResponseBody, await res.json())
};