import {z} from 'zod'

export type ValidateCombineRequestDto = {dataset_ids: Array<string>};

export type CreateApiApiV1DatasetsCombineValidateArgs = {body: ValidateCombineRequestDto};

export type CreateApiApiV1DatasetsCombineValidateOptions = {baseUrl: string, bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const combineValidationDatasetTypeDto = z.object({dataset_id: z.string(), type: z.string()});

export const combineValidationColumnDto = z.object({column: z.string(), types: z.array(combineValidationDatasetTypeDto), cast_to: z.string()});

export const combineValidationTrainingTypeDto = z.object({dataset_id: z.string(), training_type: z.enum(["instruction_dataset", "preference_pairs"])});

export const combineValidationIssueDto = z.object({code: z.enum(["too_few_sources", "too_many_sources", "duplicate_source_ids", "dataset_not_found", "wrong_organization", "dataset_not_ready", "missing_run_id", "mixed_multimodal_sources", "all_preference_sources_missing_dpo_columns", "incompatible_column_types", "preference_source_missing_ranked_generations", "mixed_training_types_resolved_to_sft"]), level: z.enum(["error", "warning"]), message: z.string(), count: z.number().optional(), limit: z.number().optional(), dataset_id: z.string().optional(), status: z.string().optional(), dataset_ids: z.array(z.string()).optional(), multimodal_dataset_ids: z.array(z.string()).optional(), text_dataset_ids: z.array(z.string()).optional(), columns: z.array(combineValidationColumnDto).optional(), types: z.array(combineValidationTrainingTypeDto).optional()});

export const validateCombineResponseDto = z.object({compatible: z.boolean(), training_type: z.enum(["instruction_dataset", "preference_pairs"]).optional(), total_estimated_rows: z.number().optional(), issues: z.array(combineValidationIssueDto)});

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
};

/**
 * Validate that a set of Datasets can be combined
 * 
 * POST /api/v1/datasets/combine/validate
 */
export const createApiApiV1DatasetsCombineValidate = async (args: CreateApiApiV1DatasetsCombineValidateArgs, options: CreateApiApiV1DatasetsCombineValidateOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/datasets/combine/validate${query.size > 0 ? `?${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(validateCombineResponseDto, await res.json())
};