import {z} from 'zod'

export type CloudFile = {provider: string, fileId: string, fileName: string};

export type ParseMethod = 'default' | 'pypdf' | 'pdfplumber' | 'unstructured' | 'pymupdf' | 'deepdoc';

export type ChunkStrategy = 'recursive' | 'fixed_size' | 'markdown';

export type CloudIngestRequest = {files: Array<CloudFile>, collection: string, parse_method?: (ParseMethod | null) | undefined, chunk_strategy?: (ChunkStrategy | null) | undefined, chunk_size?: (number | null) | undefined, chunk_overlap?: (number | null) | undefined, separators?: (Array<string> | null) | undefined, embedding_model_id?: string | undefined, embedding_batch_size?: (number | null) | undefined, max_retries?: (number | null) | undefined, retry_delay?: (number | null) | undefined};

export type CreateApiApiKbIngestCloudArgs = {body: CloudIngestRequest};

export type CreateApiApiKbIngestCloudOptions = {baseUrl: string, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const ingestionStepResult = z.object({name: z.string(), metadata: z.record(z.string(), z.unknown()).optional()});

export const ingestionResult = z.object({status: z.string(), doc_id: z.string().nullable().optional(), parse_hash: z.string().nullable().optional(), chunk_count: z.number().int().gte(0).optional(), embedding_count: z.number().int().gte(0).optional(), vector_count: z.number().int().gte(0).optional(), completed_steps: z.array(ingestionStepResult).optional(), failed_step: z.string().nullable().optional(), message: z.string(), warnings: z.array(z.string()).optional(), file_id: z.string().nullable().optional()});

export const createApiApiKbIngestCloudResponse = z.array(ingestionResult);

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
};

/**
 * Ingest Cloud
 * 
 * POST /api/kb/ingest-cloud
 */
export const createApiApiKbIngestCloud = async (args: CreateApiApiKbIngestCloudArgs, options: CreateApiApiKbIngestCloudOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/kb/ingest-cloud${query.size > 0 ? `?${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(createApiApiKbIngestCloudResponse, await res.json())
};