import {z} from 'zod'

export type FileChunk = {type?: 'file' | undefined, file_id: string};

export type DocumentURLChunk = {type?: 'document_url' | undefined, document_url: string, document_name?: (string | null) | undefined};

export type ImageDetail = 'low' | 'auto' | 'high';

export type ImageURL = {url: string, detail?: (ImageDetail | null) | undefined};

export type ImageURLChunk = {type?: 'image_url' | undefined, image_url: ImageURL | string};

export type ResponseFormats = 'text' | 'json_object' | 'json_schema';

export type JsonSchema = {name: string, description?: (string | null) | undefined, schema: {[key: string]: unknown}, strict?: boolean | undefined};

export type ResponseFormat = {type?: ResponseFormats | undefined, json_schema?: (JsonSchema | null) | undefined};

export type OCRRequest = {model: string | null, document: FileChunk | DocumentURLChunk | ImageURLChunk, pages?: (string | Array<number> | null) | undefined, include_image_base64?: (boolean | null) | undefined, image_limit?: (number | null) | undefined, image_min_size?: (number | null) | undefined, bbox_annotation_format?: (ResponseFormat | null) | undefined, document_annotation_format?: (ResponseFormat | null) | undefined, document_annotation_prompt?: (string | null) | undefined, table_format?: ('markdown' | 'html' | null) | undefined, extract_header?: boolean | undefined, extract_footer?: boolean | undefined, include_blocks?: boolean | undefined, confidence_scores_granularity?: ('word' | 'page' | 'block' | null) | undefined};

export type CreateApiV1OcrArgs = {body: OCRRequest};

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

export const oCRImageObject = z.object({id: z.string(), top_left_x: z.number().int().gte(0).nullable(), top_left_y: z.number().int().gte(0).nullable(), bottom_right_x: z.number().int().gte(0).nullable(), bottom_right_y: z.number().int().gte(0).nullable(), image_base64: z.string().nullable().optional(), image_annotation: z.string().nullable().optional()});

export const oCRConfidenceScore = z.object({text: z.string(), confidence: z.number().gte(0).lte(1), start_index: z.number().int().gte(0)});

export const oCRTableObject = z.object({id: z.string(), content: z.string(), format: z.enum(["markdown", "html"]), word_confidence_scores: z.array(oCRConfidenceScore).nullable().optional()});

export const oCRPageDimensions = z.object({dpi: z.number().int().gte(0), height: z.number().int().gte(0), width: z.number().int().gte(0)});

export const oCRPageConfidenceScores = z.object({word_confidence_scores: z.array(oCRConfidenceScore).optional(), average_page_confidence_score: z.number().gte(0).lte(1), minimum_page_confidence_score: z.number().gte(0).lte(1)});

export const oCRBlockConfidenceScores = z.object({average_content_confidence_score: z.number().gte(0).lte(1).nullable().optional(), minimum_content_confidence_score: z.number().gte(0).lte(1).nullable().optional(), block_type_confidence_score: z.number().gte(0).lte(1).nullable().optional()});

export const oCRTextBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("text").optional()});

export const oCRListBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("list").optional()});

export const oCRImageBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("image").optional(), image_id: z.string()});

export const oCRTableBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("table").optional(), table_id: z.string().nullable().optional()});

export const oCRTitleBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("title").optional()});

export const oCREquationBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("equation").optional()});

export const oCRCaptionBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("caption").optional()});

export const oCRCodeBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("code").optional()});

export const oCRReferencesBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("references").optional()});

export const oCRAsideTextBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("aside_text").optional()});

export const oCRHeaderBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("header").optional()});

export const oCRFooterBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("footer").optional()});

export const oCRSignatureBlock = z.object({top_left_x: z.number().int().gte(0), top_left_y: z.number().int().gte(0), bottom_right_x: z.number().int().gte(0), bottom_right_y: z.number().int().gte(0), content: z.string(), confidence_scores: oCRBlockConfidenceScores.nullable().optional(), type: z.literal("signature").optional()});

export const oCRPageObject = z.object({index: z.number().int().gte(0), markdown: z.string(), images: z.array(oCRImageObject), tables: z.array(oCRTableObject).optional(), hyperlinks: z.array(z.string()).optional(), header: z.string().nullable().optional(), footer: z.string().nullable().optional(), dimensions: oCRPageDimensions.nullable(), confidence_scores: oCRPageConfidenceScores.nullable().optional(), blocks: z.array(z.discriminatedUnion("type", [oCRTextBlock, oCRListBlock, oCRImageBlock, oCRTableBlock, oCRTitleBlock, oCREquationBlock, oCRCaptionBlock, oCRCodeBlock, oCRReferencesBlock, oCRAsideTextBlock, oCRHeaderBlock, oCRFooterBlock, oCRSignatureBlock])).nullable().optional()});

export const oCRUsageInfo = z.object({pages_processed: z.number().int().gte(0), doc_size_bytes: z.number().int().nullable().optional()});

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

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
};

/**
 * OCR
 * 
 * POST /v1/ocr
 */
export const createApiV1Ocr = async (args: CreateApiV1OcrArgs, options?: CreateApiV1OcrOptions) => {
const {baseUrl = "https://api.mistral.ai", fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

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

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())
};