import {z} from 'zod'

export type DatasetSplitOptions = {trainingSplitRatio: number, testingSplitRatio: number, validationSplitRatio?: number | undefined, excludeDisabledSamples?: boolean | undefined, stratifyBy?: ({label?: boolean | undefined, metadataKeys?: Array<string> | undefined}) | undefined, keepTogetherMetadataKeys?: Array<string> | undefined};

export type CreateApiApiProjectIdSplitPreviewArgs = {projectId: number, body: DatasetSplitOptions};

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

export const datasetSplitPreviewRow = z.object({stratValue: z.string(), splitCategory: z.enum(["training", "testing", "validation"]), sampleCount: z.number(), percentWithinGroup: z.number(), totalLengthMs: z.number().optional(), percentWithinGroupDuration: z.number().optional()});

export const datasetSplitPreviewSection = z.object({title: z.string(), summary: z.string().optional(), keyLabel: z.string(), rows: z.array(datasetSplitPreviewRow)});

export const datasetSplitPreview = z.object({assignmentPreview: datasetSplitPreviewSection, balancePreviews: z.array(datasetSplitPreviewSection)});

export const datasetSplitPreviewResponse = z.object({success: z.boolean(), error: z.string().optional(), data: datasetSplitPreview});

export const startJobResponse = z.object({success: z.boolean(), error: z.string().optional(), id: z.number().int()});

export const createApiApiProjectIdSplitPreviewResponse = z.union([datasetSplitPreviewResponse, startJobResponse]);

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
};

/**
 * Split dataset preview
 * 
 * POST /api/{projectId}/split-preview
 * 
 * Also accepts auth: JWTAuthentication, JWTHttpHeaderAuthentication, OAuth2
 */
export const createApiApiProjectIdSplitPreview = async (args: CreateApiApiProjectIdSplitPreviewArgs, options?: CreateApiApiProjectIdSplitPreviewOptions) => {
const {baseUrl = "https://studio.edgeimpulse.com/v1", fetch: fetchFn = fetch, ApiKeyAuthentication} = options ?? {}

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

if (ApiKeyAuthentication !== undefined) headers.set("x-api-key", ApiKeyAuthentication)

const url = `${baseUrl.replace(/\/+$/, '')}/api/${encodeURIComponent(String(args.projectId))}/split-preview${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(createApiApiProjectIdSplitPreviewResponse, await res.json())
};