import { test, describe, beforeEach, afterEach } from "node:test";
import assert from "node:assert";
import "../test-helpers/setup-localstorage.mjs";
import { SyncMetadataStore, __testExports } from "../../js/nostr/syncMetadataStore.js";

const { SYNC_METADATA_STORAGE_KEY } = __testExports;

describe("SyncMetadataStore", () => {
  beforeEach(() => {
    localStorage.clear();
  });

  afterEach(() => {
    localStorage.clear();
  });

  test("should load from localStorage on initialization", () => {
    const data = [["key1", 1234567890]];
    localStorage.setItem(SYNC_METADATA_STORAGE_KEY, JSON.stringify(data));

    const store = new SyncMetadataStore();
    // computeKey(kind, pubkey, dTag, relayUrl)
    // We don't know the components of "key1" but it should be in the map.
    // However, the class treats keys opaquely once computed.
    // Let's use internal map to verify if possible, or verify via public API if we know the key components.
    // Accessing private property? logic uses `this.metadata`.
    // We can't easily access `this.metadata` if it's not exposed.
    // But we can verify with `getLastSeen`.

    // Wait, "key1" isn't a valid key format generated by computeKey, but load() just loads the map.
    // getLastSeen computes the key again.
    // So if we pre-populate with a valid key, we can test it.

    const kind = 1;
    const pubkey = "pubkey1";
    const dTag = "dtag1";
    const relayUrl = "wss://relay1.com";
    const key = `${kind}:${pubkey}:${dTag}:${relayUrl}`;
    const timestamp = 1000;

    localStorage.setItem(SYNC_METADATA_STORAGE_KEY, JSON.stringify([[key, timestamp]]));

    const store2 = new SyncMetadataStore();
    assert.strictEqual(store2.getLastSeen(kind, pubkey, dTag, relayUrl), timestamp);
  });

  test("should update last seen and save to localStorage", () => {
    const store = new SyncMetadataStore();
    const kind = 1;
    const pubkey = "pubkey1";
    const dTag = "dtag1";
    const relayUrl = "wss://relay1.com";
    const timestamp = 2000;

    store.updateLastSeen(kind, pubkey, dTag, relayUrl, timestamp);

    assert.strictEqual(store.getLastSeen(kind, pubkey, dTag, relayUrl), timestamp);

    const saved = JSON.parse(localStorage.getItem(SYNC_METADATA_STORAGE_KEY));
    const key = `${kind}:${pubkey}:${dTag}:${relayUrl}`;
    const entry = saved.find(e => e[0] === key);
    assert.ok(entry);
    assert.strictEqual(entry[1], timestamp);
  });

  test("should only update if timestamp is newer", () => {
    const store = new SyncMetadataStore();
    const kind = 1;
    const pubkey = "pubkey1";
    const dTag = "dtag1";
    const relayUrl = "wss://relay1.com";

    store.updateLastSeen(kind, pubkey, dTag, relayUrl, 2000);
    assert.strictEqual(store.getLastSeen(kind, pubkey, dTag, relayUrl), 2000);

    // Try older
    store.updateLastSeen(kind, pubkey, dTag, relayUrl, 1000);
    assert.strictEqual(store.getLastSeen(kind, pubkey, dTag, relayUrl), 2000);

    // Try newer
    store.updateLastSeen(kind, pubkey, dTag, relayUrl, 3000);
    assert.strictEqual(store.getLastSeen(kind, pubkey, dTag, relayUrl), 3000);
  });

  test("should get per-relay last seen", () => {
    const store = new SyncMetadataStore();
    const kind = 1;
    const pubkey = "pubkey1";
    const dTag = "dtag1";

    store.updateLastSeen(kind, pubkey, dTag, "wss://relay1.com", 1000);
    store.updateLastSeen(kind, pubkey, dTag, "wss://relay2.com", 2000);
    store.updateLastSeen(kind, pubkey, "other", "wss://relay1.com", 3000); // Should be ignored

    const result = store.getPerRelayLastSeen(kind, pubkey, dTag);

    assert.deepStrictEqual(result, {
        "wss://relay1.com": 1000,
        "wss://relay2.com": 2000
    });
  });

  test("should handle missing localStorage gracefully", () => {
    const originalLocalStorage = globalThis.localStorage;
    delete globalThis.localStorage; // Simulate missing localStorage

    try {
        const store = new SyncMetadataStore();
        store.updateLastSeen(1, "p", "d", "r", 100); // Should not throw
        // Can't check persistence, but ensure no crash
    } finally {
        globalThis.localStorage = originalLocalStorage;
    }
  });
});