import {z} from 'zod'

export type MCPCheckInputRequest = {approval_id?: string | undefined, client_id?: string | undefined, user_token?: string | undefined, tenant_id?: string | undefined, user_id?: string | undefined, user_role?: string | undefined, connector_type: string, tool?: string | undefined, statement: string, parameters?: {[key: string]: unknown} | undefined, operation?: ('query' | 'execute') | undefined, content_type?: string | undefined};

export type CreateApiApiV1McpCheckInputArgs = {'X-Axonflow-Approval-Id'?: string | undefined, 'Idempotency-Key'?: string | undefined, 'X-Axonflow-PEP-Handshake'?: string | undefined, body: MCPCheckInputRequest};

export type CreateApiApiV1McpCheckInputOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const pendingApproval = z.object({approval_id: z.string(), status: z.enum(["pending", "approved"]), plane: z.enum(["mcp:request", "decide"]), expires_at: z.string().optional(), retry: z.object({header: z.literal("X-Axonflow-Approval-Id"), argument: z.literal("approval_id").optional(), body_field: z.literal("approval_id").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 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 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 richerPolicyMatch = z.object({policy_id: z.string().optional(), policy_name: z.string().optional(), risk_level: z.enum(["low", "medium", "high", "critical"]).optional(), allow_override: z.boolean().optional(), policy_version: z.number().int().optional()});

export const mCPCheckInputResponse = z.object({pending_approval: pendingApproval.optional(), approval_id: z.string().optional(), allowed: z.boolean().optional(), block_reason: z.string().optional(), policies_evaluated: z.number().int().optional(), policy_info: policyInfo.optional(), decision_id: z.string().optional(), risk_level: z.enum(["low", "medium", "high", "critical"]).optional(), policy_matches: z.array(richerPolicyMatch).optional(), override_available: z.boolean().optional(), override_existing_id: z.string().optional(), redacted: z.boolean().optional(), redacted_statement: z.string().optional(), redacted_parameters: z.record(z.string(), 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 input against policies
 * 
 * POST /api/v1/mcp/check-input
 */
export const createApiApiV1McpCheckInput = async (args: CreateApiApiV1McpCheckInputArgs, options?: CreateApiApiV1McpCheckInputOptions) => {
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-Approval-Id'] != null) headers.set("X-Axonflow-Approval-Id", String(args['X-Axonflow-Approval-Id']))
if (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
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-input${query.size > 0 ? `?${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(mCPCheckInputResponse, await res.json())
};