import { describe, expect, it } from "vitest";

import {
  assertValidStoragePolicy,
  type BrowserStoragePolicy,
} from "../../src/application/ports/browser-file-storage/shared.ts";

const localFirstPolicy: BrowserStoragePolicy = Object.freeze({
  owner: "frontend-platform",
  namespace: "draft-attachments",
  classification: "PERSONAL",
  authority: "LOCAL_FIRST",
  accountScope: "OPAQUE_PARTITION",
  retention: Object.freeze({ kind: "UNTIL_SYNCED" }),
  softBudgetBytes: 8 * 1024 * 1024,
  hardBudgetBytes: 16 * 1024 * 1024,
  evictionPriority: "USER_AUTHORED",
  logoutAction: "EXPORT_THEN_PURGE",
  accountDeletionAction: "PURGE_PARTITION",
  pressureAction: "RETAIN",
  unavailableFallback: "EXPORT_REQUIRED",
});

describe("browser storage policy", () => {
  it("accepts a coherent dataset policy snapshot", () => {
    expect(() => assertValidStoragePolicy(localFirstPolicy)).not.toThrow();
  });

  it("accepts explicitly evictable reconstructable origin data", () => {
    expect(() =>
      assertValidStoragePolicy({
        ...localFirstPolicy,
        classification: "PUBLIC",
        authority: "RECONSTRUCTABLE",
        accountScope: "ORIGIN_SHARED",
        retention: { kind: "TTL", maxAgeMs: 60_000 },
        evictionPriority: "RECONSTRUCTABLE",
        logoutAction: "KEEP_ORIGIN_SHARED",
        accountDeletionAction: "KEEP_ORIGIN_SHARED",
        pressureAction: "EVICT_RECONSTRUCTABLE",
        unavailableFallback: "ONLINE_ONLY",
      }),
    ).not.toThrow();
  });

  it.each([
    {
      name: "unsafe governance owner",
      patch: { owner: " account@example.com " },
    },
    {
      name: "personal origin-shared data",
      patch: {
        accountScope: "ORIGIN_SHARED",
        logoutAction: "KEEP_ORIGIN_SHARED",
        accountDeletionAction: "KEEP_ORIGIN_SHARED",
      },
    },
    {
      name: "partition without purge",
      patch: { logoutAction: "KEEP_ORIGIN_SHARED" },
    },
    {
      name: "unsynced partition without export",
      patch: { logoutAction: "PURGE_PARTITION" },
    },
    {
      name: "unsafe pressure eviction",
      patch: { pressureAction: "EVICT_RECONSTRUCTABLE" },
    },
    {
      name: "zero hard budget",
      patch: { softBudgetBytes: 0, hardBudgetBytes: 0 },
    },
  ] as const)("rejects $name", ({ patch }) => {
    expect(() =>
      assertValidStoragePolicy({
        ...localFirstPolicy,
        ...patch,
      } as BrowserStoragePolicy),
    ).toThrow(TypeError);
  });
});