import { describe, test, expect, beforeEach } from 'vitest';
import { Activities } from '~/src/wallet';
import { StoreInMemory } from '~/src/storage';

describe('Activities', () => {
  let store: StoreInMemory;
  let activities: Activities;

  beforeEach(() => {
    store = new StoreInMemory();
    activities = new Activities(store);
  });

  test('should add activity with auto-generated timestamp', async () => {
    const activity = {
      type: 'WalletName',
      id: 'wallet1',
      value: 'Test Wallet',
    };

    await activities.addActivity(activity);
    await activities.compileSnapshot();

    const storedActivity = activities.getActivity('WalletName', 'wallet1');
    expect(storedActivity).toBeDefined();
    expect(storedActivity?.timestamp).toBeDefined();
    expect(storedActivity?.value).toBe('Test Wallet');
  });

  test('should preserve provided timestamp', async () => {
    const timestamp = BigInt(1234567890000);
    const activity = {
      timestamp,
      type: 'WalletName',
      id: 'wallet1',
      value: 'Test Wallet',
    };

    await activities.addActivity(activity);
    const snapshot = await activities.compileSnapshot();

    const storedActivity = activities.getActivity('WalletName', 'wallet1');
    expect(storedActivity?.timestamp).toBe(timestamp);
  });

  test('should update existing activity with newer timestamp', async () => {
    const oldTimestamp = BigInt(1000);
    const newTimestamp = BigInt(2000);

    await activities.addActivity({
      timestamp: oldTimestamp,
      type: 'WalletName',
      id: 'wallet1',
      value: 'Old Name',
    });

    await activities.addActivity({
      timestamp: newTimestamp,
      type: 'WalletName',
      id: 'wallet1',
      value: 'New Name',
    });

    await activities.compileSnapshot();
    const activity = activities.getActivity('WalletName', 'wallet1');

    expect(activity?.value).toBe('New Name');
    expect(activity?.timestamp).toBe(newTimestamp);
  });

  test('should honor first-seen policy', async () => {
    activities.registerPolicy('TransactionFirstSeen', (existing, newer) => {
      return existing || newer;
    });

    const oldTimestamp = BigInt(1000);
    const newTimestamp = BigInt(2000);

    await activities.addActivity({
      timestamp: oldTimestamp,
      type: 'TransactionFirstSeen',
      id: 'tx1',
      value: 'First Value',
    });

    await activities.addActivity({
      timestamp: newTimestamp,
      type: 'TransactionFirstSeen',
      id: 'tx1',
      value: 'Second Value',
    });

    const snapshot = await activities.compileSnapshot();
    const activity = activities.getActivity('TransactionFirstSeen', 'tx1');

    expect(activity?.value).toBe('First Value');
    expect(activity?.timestamp).toBe(oldTimestamp);
  });

  test('should handle custom policy with comparison function', async () => {
    // Policy that keeps activity with highest value
    activities.registerPolicy('CustomType', (existing, newer) => {
      if (!existing) return newer;
      return existing.value > newer.value ? existing : newer;
    });

    await activities.addActivity({
      timestamp: BigInt(1000),
      type: 'CustomType',
      id: 'custom1',
      value: 50,
    });

    await activities.addActivity({
      timestamp: BigInt(2000),
      type: 'CustomType',
      id: 'custom1',
      value: 30,
    });

    const snapshot = await activities.compileSnapshot();
    const activity = activities.getActivity('CustomType', 'custom1');

    expect(activity?.value).toBe(50);
  });

  test('should process multiple activities in chronological order', async () => {
    const testActivities = [
      {
        timestamp: BigInt(3000),
        type: 'WalletName',
        id: 'wallet1',
        value: 'Name 3',
      },
      {
        timestamp: BigInt(1000),
        type: 'WalletName',
        id: 'wallet1',
        value: 'Name 1',
      },
      {
        timestamp: BigInt(2000),
        type: 'WalletName',
        id: 'wallet1',
        value: 'Name 2',
      },
    ];

    for (const activity of testActivities) {
      await activities.addActivity(activity);
    }

    await activities.compileSnapshot();
    const finalActivity = activities.getActivity('WalletName', 'wallet1');

    expect(finalActivity?.value).toBe('Name 3');
  });

  test('should handle multiple activity types independently', async () => {
    await activities.addActivity({
      timestamp: BigInt(1000),
      type: 'WalletName',
      id: 'wallet1',
      value: 'My Wallet',
    });

    await activities.addActivity({
      timestamp: BigInt(2000),
      type: 'WalletDescription',
      id: 'wallet1',
      value: 'My Description',
    });

    await activities.compileSnapshot();

    expect(activities.getActivity('WalletName', 'wallet1')?.value).toBe(
      'My Wallet',
    );
    expect(activities.getActivity('WalletDescription', 'wallet1')?.value).toBe(
      'My Description',
    );
  });

  test('should update snapshot immediately when activity is added', async () => {
    const activity = {
      timestamp: BigInt(1000),
      type: 'WalletName',
      id: 'wallet1',
      value: 'Test Wallet',
    };

    await activities.addActivity(activity);

    // Check snapshot without calling compileSnapshot
    const storedActivity = activities.getActivity('WalletName', 'wallet1');
    expect(storedActivity?.value).toBe('Test Wallet');
  });

  test('should handle missing timestamp gracefully', async () => {
    const activity = {
      type: 'WalletName',
      id: 'wallet1',
      value: 'Test Wallet',
    };

    await activities.addActivity(activity);
    await activities.compileSnapshot();
    const storedActivity = activities.getActivity('WalletName', 'wallet1');

    expect(storedActivity).toBeDefined();
    expect(storedActivity?.timestamp).toBeDefined();
    expect(typeof storedActivity?.timestamp).toBe('bigint');
  });

  test('should handle store errors gracefully', async () => {
    // Simulate store failure
    store.set = async () => {
      throw new Error('Store error');
    };

    await expect(
      activities.addActivity({
        type: 'WalletName',
        id: 'wallet1',
        value: 'Test',
      }),
    ).rejects.toThrow('Store error');
  });

  test('should handle concurrent activity additions', async () => {
    const promises: Promise<void>[] = []; // Add explicit type annotation
    for (let i = 0; i < 10; i++) {
      promises.push(
        activities.addActivity({
          timestamp: BigInt(i),
          type: 'WalletName',
          id: 'wallet1',
          value: `Value ${i}`,
        }),
      );
    }

    await Promise.all(promises);
    await activities.compileSnapshot();

    // Should have the last value
    expect(activities.getActivity('WalletName', 'wallet1')?.value).toBe(
      'Value 9',
    );
  });

  /*
  test('should cleanup old activities from store when newer versions are added', async () => {
    // Add first activity
    await activities.addActivity({
      timestamp: BigInt(1000),
      type: 'WalletName',
      id: 'wallet1',
      value: 'Old Name',
    });

    expect(Object.keys(await store.all()).length).toBe(1);

    // Add newer version - should trigger cleanup of old version
    await activities.addActivity({
      timestamp: BigInt(2000),
      type: 'WalletName',
      id: 'wallet1',
      value: 'New Name',
    });

    // Should still be 1 as old activity was culled
    expect(Object.keys(await store.all()).length).toBe(1);

    // Add different type
    await activities.addActivity({
      timestamp: BigInt(1500),
      type: 'WalletDescription',
      id: 'wallet1',
      value: 'Description',
    });

    // Should now have 2 activities
    expect(Object.keys(await store.all()).length).toBe(2);
  });
  */
});