import {z} from 'zod'

export type GetApiDocumentsArgs = {limit?: number | undefined, cursor?: (string | null) | undefined};

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

export const documentListItem = z.object({id: z.string(), workspace_id: z.string(), filename: z.string(), content_hash: z.string(), size_bytes: z.number().int(), type: z.enum(["markdown", "text", "pdf", "html", "docx", "pptx", "xlsx", "image"]), mime_type: z.string().nullable().optional(), conversion_status: z.enum(["not_required", "pending", "completed", "failed"]).optional(), original_filename: z.string().nullable().optional(), original_sha256: z.string().nullable().optional(), normalized_text_hash: z.string().nullable().optional(), converter: z.string().nullable().optional(), uploaded_by_contributor_id: z.string().nullable().optional(), author: z.string().nullable().optional(), tags: z.array(z.string()).optional(), source_url: z.string().nullable().optional(), description: z.string().nullable().optional(), source_authority: z.string().nullable().optional(), original_date: z.string().nullable().optional(), effective_from: z.string().nullable().optional(), created_at: z.string(), updated_at: z.string(), extraction_count: z.number().int().optional(), scope_summary: z.record(z.string(), z.number().int()).nullable().optional()});

export const documentListResponse = z.object({documents: z.array(documentListItem), next_cursor: z.string().nullable().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
};

/**
 * List documents in workspace
 * 
 * GET /documents
 */
export const getApiDocuments = async (args: GetApiDocumentsArgs, options: GetApiDocumentsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.cursor != null) query.append("cursor", String(args.cursor))

const url = `${baseUrl.replace(/\/+$/, '')}/documents${query.size > 0 ? `?${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(documentListResponse, await res.json())
};