import {z} from 'zod'

export type GeminiPart = {text?: string | undefined, thought?: boolean | undefined, thoughtSignature?: string | undefined, inlineData?: ({mimeType?: string | undefined, data?: string | undefined, displayName?: string | undefined}) | undefined, fileData?: ({mimeType?: string | undefined, fileUri?: string | undefined, displayName?: string | undefined}) | undefined, functionCall?: ({id?: string | undefined, name?: string | undefined, args?: Record<string, never> | undefined}) | undefined, functionResponse?: ({id?: string | undefined, name?: string | undefined, response?: Record<string, never> | undefined, willContinue?: boolean | undefined, scheduling?: string | undefined}) | undefined, executableCode?: ({language?: string | undefined, code?: string | undefined}) | undefined, codeExecutionResult?: ({outcome?: ('OUTCOME_UNSPECIFIED' | 'OUTCOME_OK' | 'OUTCOME_FAILED' | 'OUTCOME_DEADLINE_EXCEEDED') | undefined, output?: string | undefined}) | undefined, videoMetadata?: ({fps?: number | undefined, startOffset?: string | undefined, endOffset?: string | undefined}) | undefined};

export type GeminiContent = {role?: ('user' | 'model') | undefined, parts?: Array<GeminiPart> | undefined};

export type GeminiEmbeddingRequest = {model?: string | undefined, content?: GeminiContent | undefined, taskType?: string | undefined, title?: string | undefined, outputDimensionality?: number | undefined};

export type CreateApiGenaiV1betaModelsModelEmbedContentArgs = {model: string, body: GeminiEmbeddingRequest};

export type CreateApiGenaiV1betaModelsModelEmbedContentOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const geminiEmbeddingResponse = z.object({embeddings: z.array(z.object({values: z.array(z.number()).optional(), statistics: z.object({tokenCount: z.number().int().optional()}).optional()})).optional(), metadata: z.object({billableCharacterCount: z.number().int().optional()}).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
};

/**
 * Embed content (Gemini format)
 * 
 * POST /genai/v1beta/models/{model}:embedContent
 * 
 * Also accepts auth: BasicAuth, VirtualKeyAuth, ApiKeyAuth
 */
export const createApiGenaiV1betaModelsModelEmbedContent = async (args: CreateApiGenaiV1betaModelsModelEmbedContentArgs, options?: CreateApiGenaiV1betaModelsModelEmbedContentOptions) => {
const {baseUrl = "http://localhost:8080", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/genai/v1beta/models/${encodeURIComponent(String(args.model))}:embedContent${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(geminiEmbeddingResponse, await res.json())
};