import {z} from 'zod'

export type MCPCheckOutputRequest = {client_id?: string | undefined, user_token?: string | undefined, tenant_id?: string | undefined, user_id?: string | undefined, connector_type: string, tool?: string | undefined, response_data: Array<{[key: string]: unknown}>, message?: string | undefined, metadata?: {[key: string]: unknown} | undefined, row_count?: number | undefined} | {client_id?: string | undefined, user_token?: string | undefined, tenant_id?: string | undefined, user_id?: string | undefined, connector_type: string, tool?: string | undefined, response_data?: Array<{[key: string]: unknown}> | undefined, message: string, metadata?: {[key: string]: unknown} | undefined, row_count?: number | undefined};

export type CreateApiApiV1McpCheckOutputArgs = {'X-Axonflow-Client'?: string | undefined, 'X-Axonflow-PEP-Handshake'?: string | undefined, body: MCPCheckOutputRequest};

export type CreateApiApiV1McpCheckOutputOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const exfiltrationCheckInfo = z.object({rows_returned: z.number().int().optional(), row_limit: z.number().int().optional(), bytes_returned: z.number().int().optional(), byte_limit: z.number().int().optional(), within_limits: z.boolean().optional()});

export const policyMatchInfo = z.object({policy_id: z.string().optional(), policy_name: z.string().optional(), category: z.string().optional(), severity: z.string().optional(), action: z.string().optional()});

export const policyInfo = z.object({policies_evaluated: z.number().int().optional(), blocked: z.boolean().optional(), block_reason: z.string().optional(), redactions_applied: z.number().int().optional(), processing_time_ms: z.number().int().optional(), matched_policies: z.array(policyMatchInfo).optional(), exfiltration_check: exfiltrationCheckInfo.optional()});

export const mCPCheckOutputResponse = z.object({allowed: z.boolean().optional(), block_reason: z.string().optional(), redacted_data: z.unknown(), policies_evaluated: z.number().int().optional(), exfiltration_info: exfiltrationCheckInfo.optional(), policy_info: policyInfo.optional(), decision_id: z.string().optional(), redaction_evaluated: z.boolean().optional(), engine: z.literal("anchored").optional(), subject_type: z.string().optional(), policy_bundle: z.string().optional(), policy_packs: z.array(z.string()).optional(), legacy_validators: z.array(z.object({validator: z.enum(["indonesia_pii", "india_pii"]), action: z.enum(["blocked", "masked"])})).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
};

/**
 * Validate MCP output against policies
 * 
 * POST /api/v1/mcp/check-output
 */
export const createApiApiV1McpCheckOutput = async (args: CreateApiApiV1McpCheckOutputArgs, options?: CreateApiApiV1McpCheckOutputOptions) => {
const {baseUrl = "https://agent.getaxonflow.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args['X-Axonflow-Client'] != null) headers.set("X-Axonflow-Client", String(args['X-Axonflow-Client']))
if (args['X-Axonflow-PEP-Handshake'] != null) headers.set("X-Axonflow-PEP-Handshake", String(args['X-Axonflow-PEP-Handshake']))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/mcp/check-output${query.size > 0 ? `?${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(mCPCheckOutputResponse, await res.json())
};