import {z} from 'zod'

export type CreateApiOcrPhotoRecognizeFormAdvancedArgs = {bucketID?: string | undefined, bucketSecretKey?: string | undefined, recognitionMode?: string | undefined, preprocessing?: string | undefined, diagnostics?: string | undefined, body: BodyInit};

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

export const formFieldDefinition = z.object({FieldID: z.string().optional(), LeftAnchor: z.string().optional(), TopAnchor: z.string().optional(), BottomAnchor: z.string().optional(), AlternateAnchor: z.string().optional(), AnchorMode: z.string().optional(), DataType: z.string().optional(), TargetDigitCount: z.number().int().optional(), MinimumCharacterCount: z.number().int().optional(), AllowNumericDigits: z.boolean().optional(), VerticalAlignmentType: z.string().optional(), HorizontalAlignmentType: z.string().optional(), TargetFieldWidth_Relative: z.number().optional(), TargetFieldHeight_Relative: z.number().optional(), TargetFieldHorizontalAdjustment: z.number().optional(), TargetFieldVerticalAdjustment: z.number().optional(), Ignore: z.array(z.string()).optional(), Options: z.string().optional()});

export const point = z.object({X: z.number().int().optional(), Y: z.number().int().optional()});

export const ocrPhotoTextElement = z.object({Text: z.string().optional(), XLeft: z.number().int().optional(), YTop: z.number().int().optional(), Width: z.number().int().optional(), Height: z.number().int().optional(), BoundingPoints: z.array(point).optional(), ConfidenceLevel: z.number().optional()});

export const fieldResult = z.object({TargetField: formFieldDefinition.optional(), FieldValues: z.array(ocrPhotoTextElement).optional()});

export const formTableColumnDefinition = z.object({ColumnID: z.string().optional(), TopAnchor: z.string().optional(), AnchorMode: z.string().optional(), DataType: z.string().optional(), MinimumCharacterCount: z.number().int().optional(), AllowNumericDigits: z.boolean().optional()});

export const formTableDefinition = z.object({TableID: z.string().optional(), ColumnDefinitions: z.array(formTableColumnDefinition).optional(), TargetTableHeight_Relative: z.number().optional(), TargetRowHeight_Relative: z.number().optional()});

export const tableCellResult = z.object({ColumnID: z.string().optional(), CellValues: z.array(ocrPhotoTextElement).optional()});

export const tableRowResult = z.object({TableRowCellsResult: z.array(tableCellResult).optional()});

export const tableResult = z.object({TableDefinition: formTableDefinition.optional(), TableRowsResult: z.array(tableRowResult).optional()});

export const formRecognitionResult = z.object({Successful: z.boolean().optional(), FieldValueExtractionResult: z.array(fieldResult).optional(), TableValueExtractionResults: z.array(tableResult).optional(), Diagnostics: z.array(z.string()).optional(), BestMatchFormSettingName: z.string().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
};

/**
 * Recognize a photo of a form, extract key fields using stored templates
 * 
 * POST /ocr/photo/recognize/form/advanced
 */
export const createApiOcrPhotoRecognizeFormAdvanced = async (args: CreateApiOcrPhotoRecognizeFormAdvancedArgs, options?: CreateApiOcrPhotoRecognizeFormAdvancedOptions) => {
const {baseUrl = "http://localhost", fetch: fetchFn = fetch, Apikey} = options ?? {}

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

if (args.bucketID != null) headers.set("bucketID", String(args.bucketID))
if (args.bucketSecretKey != null) headers.set("bucketSecretKey", String(args.bucketSecretKey))
if (args.recognitionMode != null) headers.set("recognitionMode", String(args.recognitionMode))
if (args.preprocessing != null) headers.set("preprocessing", String(args.preprocessing))
if (args.diagnostics != null) headers.set("diagnostics", String(args.diagnostics))
if (Apikey !== undefined) headers.set("Apikey", Apikey)

const url = `${baseUrl.replace(/\/+$/, '')}/ocr/photo/recognize/form/advanced${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: args.body})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(formRecognitionResult, await res.json())
};