import {z} from 'zod'

export type OCRDocument = {type: 'document_url', document_url: string, image_url?: string | undefined} | {type: 'image_url', document_url?: string | undefined, image_url: string};

export type OCRRequest = {model: string, id?: string | undefined, document: OCRDocument, fallbacks?: Array<string> | undefined, include_image_base64?: boolean | undefined, pages?: Array<number> | undefined, image_limit?: number | undefined, image_min_size?: number | undefined, table_format?: string | undefined, extract_header?: boolean | undefined, extract_footer?: boolean | undefined, confidence_scores_granularity?: ('page' | 'block' | 'word' | 'document') | undefined, bbox_annotation_format?: ({type: 'text' | 'json_object', json_schema?: ({schema?: Record<string, never> | undefined, name?: string | undefined, strict?: boolean | undefined}) | undefined} | {type: 'json_schema', json_schema: {schema?: Record<string, never> | undefined, name?: string | undefined, strict?: boolean | undefined}}) | undefined, document_annotation_format?: ({type: 'text' | 'json_object', json_schema?: ({schema?: Record<string, never> | undefined, name?: string | undefined, strict?: boolean | undefined}) | undefined} | {type: 'json_schema', json_schema: {schema?: Record<string, never> | undefined, name?: string | undefined, strict?: boolean | undefined}}) | undefined, document_annotation_prompt?: string | undefined};

export type CreateApiV1OcrArgs = {body: OCRRequest};

export type CreateApiV1OcrOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const oCRPageImage = z.object({id: z.string(), top_left_x: z.number(), top_left_y: z.number(), bottom_right_x: z.number(), bottom_right_y: z.number(), image_base64: z.string().optional()});

export const oCRPageDimensions = z.object({dpi: z.number().int(), height: z.number().int(), width: z.number().int()});

export const oCRPage = z.object({index: z.number().int().gte(0), markdown: z.string(), images: z.array(oCRPageImage).optional(), dimensions: oCRPageDimensions.optional(), tables: z.array(z.object({})).nullable().optional(), header: z.string().nullable().optional(), footer: z.string().nullable().optional(), confidence_scores: z.object({average_page_confidence_score: z.number().optional(), minimum_page_confidence_score: z.number().optional(), word_confidence_scores: z.array(z.number()).optional()}).nullable().optional()});

export const oCRUsageInfo = z.object({pages_processed: z.number().int(), doc_size_bytes: z.number().int()});

export const modelProvider = z.enum(["openai", "azure", "anthropic", "bedrock", "cohere", "vertex", "vllm", "mistral", "ollama", "groq", "sgl", "parasail", "perplexity", "replicate", "cerebras", "deepseek", "gemini", "openrouter", "elevenlabs", "huggingface", "nebius", "xai", "runway", "fireworks"]);

export const bifrostCacheDebug = z.object({cache_hit: z.boolean().optional(), cache_id: z.string().optional(), hit_type: z.string().optional(), requested_provider: z.string().optional(), requested_model: z.string().optional(), provider_used: z.string().optional(), model_used: z.string().optional(), input_tokens: z.number().int().optional(), threshold: z.number().optional(), similarity: z.number().optional()});

export const bifrostResponseExtraFields = z.object({request_type: z.string().optional(), provider: modelProvider.optional(), model_requested: z.string().optional(), model_deployment: z.string().optional(), latency: z.number().int().optional(), chunk_index: z.number().int().optional(), raw_request: z.object({}).optional(), raw_response: z.object({}).optional(), cache_debug: bifrostCacheDebug.optional()});

export const oCRResponse = z.object({model: z.string(), pages: z.array(oCRPage), usage_info: oCRUsageInfo.optional(), document_annotation: z.string().optional(), extra_fields: bifrostResponseExtraFields.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
};

/**
 * Perform OCR
 * 
 * POST /v1/ocr
 * 
 * Also accepts auth: BasicAuth, VirtualKeyAuth, ApiKeyAuth
 */
export const createApiV1Ocr = async (args: CreateApiV1OcrArgs, options?: CreateApiV1OcrOptions) => {
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 = `${baseUrl.replace(/\/+$/, '')}/v1/ocr${query.size > 0 ? `?${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(oCRResponse, await res.json())
};