import {z} from 'zod'

export type CompositeRetrievalMode = 'routing' | 'full';

export type ReRankerType = 'system_default' | 'llm' | 'cohere' | 'bedrock' | 'score' | 'disabled';

export type ReRankConfig = {top_n?: number | undefined, type?: ReRankerType | undefined};

export type CompositeRetrievalParams = {mode?: CompositeRetrievalMode | undefined, rerank_top_n?: (number | null) | undefined, rerank_config?: ReRankConfig | undefined, query: string};

export type CreateApiApiV1RetrieversRetrieverIdRetrieveArgs = {retriever_id: string, project_id?: (string | null) | undefined, organization_id?: (string | null) | undefined, session?: (string | null) | undefined, body: CompositeRetrievalParams};

export type CreateApiApiV1RetrieversRetrieverIdRetrieveOptions = {baseUrl: string, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const compositeRetrievedTextNode = z.object({id: z.string(), retriever_id: z.string(), retriever_pipeline_name: z.string(), pipeline_id: z.string(), metadata: z.record(z.string(), z.unknown()).optional(), text: z.string(), start_char_idx: z.number().int().nullable(), end_char_idx: z.number().int().nullable()});

export const compositeRetrievedTextNodeWithScore = z.object({node: compositeRetrievedTextNode, score: z.number().nullable().optional(), class_name: z.string().optional()});

export const pageScreenshotMetadata = z.object({page_index: z.number().int().gte(0), file_id: z.string(), image_size: z.number().int().gte(0), metadata: z.record(z.string(), z.unknown()).nullable().optional()});

export const pageScreenshotNodeWithScore = z.object({node: pageScreenshotMetadata, score: z.number(), class_name: z.string().optional()});

export const pageFigureMetadata = z.object({figure_name: z.string(), file_id: z.string(), page_index: z.number().int().gte(0), figure_size: z.number().int().gte(0), is_likely_noise: z.boolean().optional(), confidence: z.number().gte(0).lte(1), metadata: z.record(z.string(), z.unknown()).nullable().optional()});

export const pageFigureNodeWithScore = z.object({node: pageFigureMetadata, score: z.number(), class_name: z.string().optional()});

export const compositeRetrievalResult = z.object({nodes: z.array(compositeRetrievedTextNodeWithScore).optional(), image_nodes: z.array(pageScreenshotNodeWithScore).optional(), page_figure_nodes: z.array(pageFigureNodeWithScore).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
};

/**
 * Retrieve
 * 
 * POST /api/v1/retrievers/{retriever_id}/retrieve
 */
export const createApiApiV1RetrieversRetrieverIdRetrieve = async (args: CreateApiApiV1RetrieversRetrieverIdRetrieveArgs, options: CreateApiApiV1RetrieversRetrieverIdRetrieveOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args.project_id != null) query.append("project_id", String(args.project_id))
if (args.organization_id != null) query.append("organization_id", String(args.organization_id))
if (args.session != null) cookies.push("session=" + encodeURIComponent(String(args.session)))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)
if (cookies.length > 0) headers.set('cookie', cookies.join('; '))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/retrievers/${encodeURIComponent(String(args.retriever_id))}/retrieve${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(compositeRetrievalResult, await res.json())
};