import assert from "node:assert/strict";
import { mkdtempSync, rmSync } from "node:fs";
import { tmpdir } from "node:os";
import path from "node:path";
import test from "node:test";

import { createFileSyncStore } from "../../apps/sync-server/src/store/fileSyncStore";

test("file-backed store survives restart and serves another device", () => {
  const tempDirectory = mkdtempSync(path.join(tmpdir(), "obsidian-sync-"));
  const storePath = path.join(tempDirectory, "sync-state.json");

  try {
    const serverA = createFileSyncStore(storePath);
    const deviceA = serverA.registerDevice({
      vaultId: "vault-1",
      deviceName: "Desktop"
    });
    const deviceB = serverA.registerDevice({
      vaultId: "vault-1",
      deviceName: "Phone"
    });

    const pushResponse = serverA.push({
      vaultId: "vault-1",
      deviceId: deviceA.deviceId,
      knownServerRevision: 0,
      files: [
        {
          manifest: {
            path: "notes/hello.md",
            kind: "text",
            contentHash: "hash-1",
            revisionId: "rev-1",
            updatedAt: "2026-04-08T00:00:00.000Z",
            sizeBytes: 12,
            deviceId: deviceA.deviceId
          },
          envelope: {
            algorithm: "AES-GCM-256",
            keyId: "key-1",
            iv: "iv-1",
            ciphertext: "cipher-1"
          }
        }
      ],
      tombstones: []
    });

    assert.deepEqual(pushResponse.acceptedFilePaths, ["notes/hello.md"]);

    const serverB = createFileSyncStore(storePath);
    assert.equal(serverB.authenticate("vault-1", deviceB.deviceId, deviceB.token), true);

    const pullResponse = serverB.pull("vault-1", 0);
    assert.equal(pullResponse.changes.length, 1);
    assert.equal(pullResponse.changes[0].file?.manifest.path, "notes/hello.md");
    assert.equal(pullResponse.serverRevision, 1);
    assert.equal(pullResponse.hasMore, false);
    assert.equal(pullResponse.nextSinceServerRevision, 1);
  } finally {
    rmSync(tempDirectory, { recursive: true, force: true });
  }
});

test("file-backed store paginates pull results", () => {
  const tempDirectory = mkdtempSync(path.join(tmpdir(), "obsidian-sync-page-"));
  const storePath = path.join(tempDirectory, "sync-state.json");

  try {
    const store = createFileSyncStore(storePath);
    const device = store.registerDevice({
      vaultId: "vault-2",
      deviceName: "Desktop"
    });

    store.push({
      vaultId: "vault-2",
      deviceId: device.deviceId,
      knownServerRevision: 0,
      files: [
        {
          manifest: {
            path: "a.md",
            kind: "text",
            contentHash: "hash-a",
            revisionId: "rev-a",
            updatedAt: "2026-04-08T00:00:00.000Z",
            sizeBytes: 1,
            deviceId: device.deviceId
          },
          envelope: {
            algorithm: "AES-GCM-256",
            keyId: "key-a",
            iv: "iv-a",
            ciphertext: "cipher-a"
          }
        }
      ],
      tombstones: []
    });

    store.push({
      vaultId: "vault-2",
      deviceId: device.deviceId,
      knownServerRevision: 1,
      files: [
        {
          manifest: {
            path: "b.md",
            kind: "text",
            contentHash: "hash-b",
            revisionId: "rev-b",
            updatedAt: "2026-04-08T00:01:00.000Z",
            sizeBytes: 1,
            deviceId: device.deviceId
          },
          envelope: {
            algorithm: "AES-GCM-256",
            keyId: "key-a",
            iv: "iv-b",
            ciphertext: "cipher-b"
          }
        }
      ],
      tombstones: []
    });

    const firstPage = store.pull("vault-2", 0, 1);
    assert.equal(firstPage.changes.length, 1);
    assert.equal(firstPage.hasMore, true);
    assert.equal(firstPage.nextSinceServerRevision, 1);

    const secondPage = store.pull("vault-2", firstPage.nextSinceServerRevision, 1);
    assert.equal(secondPage.changes.length, 1);
    assert.equal(secondPage.hasMore, false);
    assert.equal(secondPage.nextSinceServerRevision, 2);
    assert.equal(secondPage.changes[0].file?.manifest.path, "b.md");
  } finally {
    rmSync(tempDirectory, { recursive: true, force: true });
  }
});

test("device revocation and key rotation state are durable", () => {
  const tempDirectory = mkdtempSync(path.join(tmpdir(), "obsidian-sync-device-"));
  const storePath = path.join(tempDirectory, "sync-state.json");

  try {
    const store = createFileSyncStore(storePath);
    const desktop = store.registerDevice({
      vaultId: "vault-3",
      deviceName: "Desktop"
    });
    const phone = store.registerDevice({
      vaultId: "vault-3",
      deviceName: "Phone"
    });

    const rotation = store.rotateVaultKey("vault-3", "key-rotated");
    assert.equal(rotation.activeKeyId, "key-rotated");

    const revoked = store.revokeDevice("vault-3", phone.deviceId);
    assert.equal(revoked.targetDeviceId, phone.deviceId);
    assert.equal(store.authenticate("vault-3", phone.deviceId, phone.token), false);

    const restartedStore = createFileSyncStore(storePath);
    const devices = restartedStore.listDevices("vault-3");
    assert.equal(devices.activeKeyId, "key-rotated");
    assert.equal(devices.devices.find((device) => device.deviceId === phone.deviceId)?.revokedAt !== undefined, true);
    assert.equal(restartedStore.authenticate("vault-3", desktop.deviceId, desktop.token), true);
  } finally {
    rmSync(tempDirectory, { recursive: true, force: true });
  }
});