import { z } from "zod";

// Base64 length of the 18 MiB transport limit documented for CSV uploads
// (18 * 1024 * 1024 bytes, evenly divisible by 3, so ceil(N/3)*4 with no
// padding). Keep in sync with the controller's raw byte-length check.
export const MAX_CSV_CONTENT_BASE64_LENGTH = 25_165_824;

export const updateExternalCsvConfigurationSchema = z
  .object({
    expectedRevision: z.number().int().nonnegative(),
    configuration: z.unknown(),
  })
  .strict();

export const previewExternalCsvSchema = z
  .object({
    fileName: z.string().trim().min(1).max(255),
    contentBase64: z.string().min(1).max(MAX_CSV_CONTENT_BASE64_LENGTH),
  })
  .strict();

export const planExternalInitialImportSchema = previewExternalCsvSchema;

export const applyExternalInitialImportSchema = z.object({
  expectedRevision: z.number().int().nonnegative(),
  expectedConfigurationVersion: z.number().int().positive(),
  expectedSha256: z.string().regex(/^[a-f0-9]{64}$/),
  fileName: z.string().trim().min(1).max(255),
  contentBase64: z.string().min(1).max(MAX_CSV_CONTENT_BASE64_LENGTH),
  sourceName: z.string().trim().min(1).max(200),
  roomDecisions: z.array(z.object({
    sourceRoomKey: z.string().trim().min(1),
    roomId: z.string().trim().min(1).nullable(),
    defaultDistributionBoardId: z.string().trim().min(1).nullable(),
  }).strict()),
  familyProjectDeviceDecisions: z.array(z.object({
    familyAndType: z.string(),
    projectDeviceId: z.string().trim().min(1).nullable(),
  }).strict()),
}).strict();