import {z} from 'zod'

export type TabularCompareTargetBody = {compare_method?: (string | null) | undefined, left?: (string | null) | undefined, right?: (string | null) | undefined};

export type TabularCompareFieldBody = {alias_as?: (string | null) | undefined, compare_method?: (string | null) | undefined, left: string, right: string};

export type TabularCompareResourceBody = {path: string, version: string};

export type TabularCompareBody = {compare: Array<TabularCompareTargetBody>, compare_id: string, display: Array<TabularCompareTargetBody>, keys: Array<TabularCompareFieldBody>, left: TabularCompareResourceBody, right: TabularCompareResourceBody};

export type CreateApiApiReposNamespaceRepoNameCompareDataFramesArgs = {namespace: string, repo_name: string, body: TabularCompareBody};

export type CreateApiApiReposNamespaceRepoNameCompareDataFramesOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const tabularCompareTargetBody = z.object({compare_method: z.string().nullable().optional(), left: z.string().nullable().optional(), right: z.string().nullable().optional()});

export const compareDupes = z.object({left: z.number().int().gte(0), right: z.number().int().gte(0)});

export const tabularCompareFieldBody = z.object({alias_as: z.string().nullable().optional(), compare_method: z.string().nullable().optional(), left: z.string(), right: z.string()});

export const compareSchemaColumn = z.object({dtype: z.string(), key: z.string(), name: z.string()});

export const compareSchemaDiff = z.object({added_cols: z.array(compareSchemaColumn), removed_cols: z.array(compareSchemaColumn)});

export const previousField = z.object({dtype: z.string(), metadata: z.unknown(), name: z.string()});

export const changes = z.object({previous: previousField.nullable().optional(), status: z.string()});

export const field = z.object({changes: changes.nullable().optional(), dtype: z.string(), metadata: z.unknown(), name: z.string()});

export const schema = z.object({fields: z.array(field), hash: z.string(), metadata: z.unknown()});

export const compareSourceSchemas = z.object({left: schema, right: schema});

export const compareTabularMods = z.object({added_rows: z.number().int().gte(0), modified_rows: z.number().int().gte(0), removed_rows: z.number().int().gte(0)});

export const compareSummary = z.object({modifications: compareTabularMods, schema: schema});

export const compareTabular = z.object({display: z.array(tabularCompareTargetBody).nullable().optional(), dupes: compareDupes, keys: z.array(tabularCompareFieldBody).nullable().optional(), schema_diff: compareSchemaDiff.nullable().optional(), source_schemas: compareSourceSchemas, summary: compareSummary.nullable().optional(), targets: z.array(tabularCompareTargetBody).nullable().optional()});

export const messageLevel = z.enum(["Info", "Warning", "Error"]);

export const oxenMessage = z.object({description: z.string(), level: messageLevel, title: z.string()});

export const compareTabularResponse = z.object({oxen_version: z.string().nullable().optional(), status: z.string(), status_message: z.string(), dfs: compareTabular, messages: z.array(oxenMessage)});

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
};

/**
 * Create a tabular data frame diff
 * 
 * POST /api/repos/{namespace}/{repo_name}/compare/data_frames
 */
export const createApiApiReposNamespaceRepoNameCompareDataFrames = async (args: CreateApiApiReposNamespaceRepoNameCompareDataFramesArgs, options?: CreateApiApiReposNamespaceRepoNameCompareDataFramesOptions) => {
const {baseUrl = "https://hub.oxen.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 = `${baseUrl.replace(/\/+$/, '')}/api/repos/${encodeURIComponent(String(args.namespace))}/${encodeURIComponent(String(args.repo_name))}/compare/data_frames${query.size > 0 ? `?${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(compareTabularResponse, await res.json())
};