import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import Database from 'better-sqlite3';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import {
  AccountContentRepository,
  RedditAccountsRepository,
} from '../src/database/account-repositories.js';
import { LEGACY_UNASSIGNED_ACCOUNT_ID, runMigrations } from '../src/database/client.js';
import { importLegacyAccountContent } from '../src/database/legacy-content-import.js';

describe('multi-account database ownership', () => {
  let db: Database.Database;
  let accounts: RedditAccountsRepository;
  let content: AccountContentRepository;

  beforeEach(() => {
    db = new Database(':memory:');
    db.pragma('foreign_keys = ON');
    runMigrations(db);
    accounts = new RedditAccountsRepository(db);
    content = new AccountContentRepository(db);
  });

  afterEach(() => db.close());

  function addAccount(accountId: string, username: string, now: number) {
    return accounts.upsertVerified({
      accountId,
      redditUsername: username,
      matrixUserId: `@${accountId}:reddit.com`,
      cookiesJson: JSON.stringify([{ name: 'reddit_session', value: `${username}-secret` }]),
      matrixCredentialsJson: JSON.stringify({ accessToken: `${username}-matrix-secret` }),
      now,
    });
  }

  it('stores private verified session material without exposing it in public listings', () => {
    const publicAccount = addAccount('t2_alice', 'alice-bot', 100);

    expect(publicAccount).toMatchObject({
      accountId: 't2_alice', redditUsername: 'alice-bot', status: 'verified', isActive: true,
      createdAt: 100, updatedAt: 100, lastVerifiedAt: 100, lastImportedAt: 100,
    });
    expect(publicAccount).not.toHaveProperty('cookiesJson');
    expect(publicAccount).not.toHaveProperty('matrixCredentialsJson');
    expect(accounts.listPublic().find((item) => item.accountId === 't2_alice'))
      .not.toHaveProperty('cookiesJson');

    expect(accounts.get('t2_alice')).toMatchObject({
      cookiesJson: expect.stringContaining('alice-bot-secret'),
      matrixCredentialsJson: expect.stringContaining('alice-bot-matrix-secret'),
    });
  });

  it('re-imports one account in place and supports multiple active accounts', () => {
    addAccount('t2_alice', 'alice-bot', 100);
    addAccount('t2_bob', 'bob-bot', 110);
    addAccount('t2_alice', 'alice-renamed', 120);

    expect(accounts.getActive().map((account) => account.accountId)).toEqual(['t2_alice', 't2_bob']);
    expect(accounts.get('t2_alice')).toMatchObject({
      redditUsername: 'alice-renamed', createdAt: 100, updatedAt: 120, lastImportedAt: 120,
    });

    expect(accounts.setActive('t2_bob', false, 130)).toBe(true);
    expect(accounts.getActive().map((account) => account.accountId)).toEqual(['t2_alice']);
    expect(accounts.get('t2_bob')).toMatchObject({ status: 'disabled', isActive: false, updatedAt: 130 });
  });

  it('partitions conversations, sync state and media even when remote IDs match', () => {
    addAccount('t2_alice', 'alice-bot', 100);
    addAccount('t2_bob', 'bob-bot', 110);

    for (const [accountId, username, updatedAt] of [
      ['t2_alice', 'recipient-a', 200],
      ['t2_bob', 'recipient-b', 300],
    ] as const) {
      content.upsertConversation({
        accountId, conversationId: 'shared-room', username, roomName: username,
        payloadJson: JSON.stringify({ username }), updatedAt,
      });
      content.saveSyncState({
        accountId, nextBatch: `cursor-${accountId}`, lastFullSyncAt: updatedAt,
        lastDeltaSyncAt: updatedAt + 1, cooldownJson: JSON.stringify({ until: updatedAt + 100 }), updatedAt,
      });
      content.upsertMedia({
        accountId, mediaId: 'shared-media', chatUsername: username, chatRoomId: 'shared-room',
        sender: username, timestamp: updatedAt, originalUrl: 'mxc://reddit.com/shared',
        fileName: `${accountId}.jpg`, relativePath: `${accountId}/shared.jpg`, createdAt: updatedAt,
      });
    }

    expect(content.getConversation('t2_alice', 'shared-room')?.username).toBe('recipient-a');
    expect(content.getConversation('t2_bob', 'shared-room')?.username).toBe('recipient-b');
    expect(content.getSyncState('t2_alice')?.nextBatch).toBe('cursor-t2_alice');
    expect(content.getSyncState('t2_bob')?.nextBatch).toBe('cursor-t2_bob');
    expect(content.getMedia('t2_alice', 'shared-media')?.fileName).toBe('t2_alice.jpg');
    expect(content.getMedia('t2_bob', 'shared-media')?.fileName).toBe('t2_bob.jpg');
  });

  it('enforces account ownership foreign keys', () => {
    expect(() => content.upsertConversation({
      accountId: 'missing', conversationId: 'room', username: 'someone', roomName: null,
      payloadJson: '{}', updatedAt: 1,
    })).toThrow(/FOREIGN KEY/);
    expect(db.pragma('foreign_key_check')).toEqual([]);
  });

  it('scopes legacy account-produced table uniqueness by account', () => {
    addAccount('t2_alice', 'alice-bot', 100);
    addAccount('t2_bob', 'bob-bot', 110);

    const insertPost = db.prepare(`
      INSERT INTO processed_posts (account_id, id, subreddit, author, title, processed_at)
      VALUES (?, 'same-post', 'test', 'recipient', 'title', 1)
    `);
    insertPost.run('t2_alice');
    insertPost.run('t2_bob');

    const insertOutbox = db.prepare(`
      INSERT INTO delivery_outbox (
        account_id, post_id, recipient, subject, message, idempotency_key,
        status, created_at, updated_at
      ) VALUES (?, 'same-post', 'recipient', 'subject', 'message', 'same-key', 'prepared', 1, 1)
    `);
    insertOutbox.run('t2_alice');
    insertOutbox.run('t2_bob');
    expect(() => insertOutbox.run('t2_alice')).toThrow(/UNIQUE/);
    expect(db.prepare('SELECT COUNT(*) count FROM delivery_outbox').get()).toEqual({ count: 2 });
  });

  it('migrates existing rows to the explicit legacy account without guessing ownership', () => {
    const legacyDb = new Database(':memory:');
    legacyDb.pragma('foreign_keys = ON');
    legacyDb.exec(`
      CREATE TABLE processed_posts (id TEXT PRIMARY KEY, subreddit TEXT NOT NULL, author TEXT NOT NULL, title TEXT NOT NULL, image_url TEXT, image_analysis TEXT, generated_message TEXT, processed_at INTEGER NOT NULL, message_sent INTEGER DEFAULT 0, error TEXT);
      CREATE TABLE sent_messages (id INTEGER PRIMARY KEY AUTOINCREMENT, post_id TEXT NOT NULL, recipient TEXT NOT NULL, subject TEXT NOT NULL, message TEXT NOT NULL, sent_at INTEGER NOT NULL);
      CREATE TABLE activity_log (id INTEGER PRIMARY KEY AUTOINCREMENT, timestamp INTEGER NOT NULL, type TEXT NOT NULL, message TEXT NOT NULL, recipient TEXT, image_url TEXT);
      INSERT INTO processed_posts VALUES ('legacy-post', 'test', 'author', 'title', NULL, NULL, NULL, 1, 1, NULL);
      INSERT INTO sent_messages (post_id, recipient, subject, message, sent_at) VALUES ('legacy-post', 'recipient', 'subject', 'message', 2);
      INSERT INTO activity_log (timestamp, type, message, recipient) VALUES (2, 'sent', 'legacy activity', 'recipient');
    `);

    runMigrations(legacyDb);

    expect(legacyDb.prepare('SELECT account_id, id FROM processed_posts').get()).toEqual({
      account_id: LEGACY_UNASSIGNED_ACCOUNT_ID, id: 'legacy-post',
    });
    expect(legacyDb.prepare('SELECT account_id FROM sent_messages').get()).toEqual({
      account_id: LEGACY_UNASSIGNED_ACCOUNT_ID,
    });
    expect(legacyDb.prepare('SELECT account_id FROM activity_log').get()).toEqual({
      account_id: LEGACY_UNASSIGNED_ACCOUNT_ID,
    });
    expect(legacyDb.prepare('SELECT status, is_active FROM reddit_accounts WHERE account_id = ?')
      .get(LEGACY_UNASSIGNED_ACCOUNT_ID)).toEqual({ status: 'legacy-unassigned', is_active: 0 });
    expect(legacyDb.pragma('foreign_key_check')).toEqual([]);
    legacyDb.close();
  });
  it('imports legacy chat and media JSON once as explicitly unassigned content', () => {
    const dataDirectory = fs.mkdtempSync(path.join(os.tmpdir(), 'redditbot-legacy-content-'));
    try {
      fs.mkdirSync(path.join(dataDirectory, 'media'));
      fs.writeFileSync(path.join(dataDirectory, 'chat-cache.json'), JSON.stringify({
        chats: [{ username: 'alice', roomName: 'Alice', roomId: 'room-alice', lastMessageTime: 1 }],
        nextBatch: 'cursor-one', lastFullSyncAt: 10, lastDeltaSyncAt: 11, cooldown: null,
      }));
      fs.writeFileSync(path.join(dataDirectory, 'media', 'index.json'), JSON.stringify({
        items: [{ id: 'media-one', chatUsername: 'alice', chatRoomId: 'room-alice', sender: 'alice', timestamp: 12, originalUrl: 'mxc://one', fileName: 'one.jpg', relativePath: 'one.jpg', createdAt: 13 }],
      }));

      expect(importLegacyAccountContent(db, dataDirectory)).toEqual({ conversations: 1, media: 1, skipped: false });
      expect(content.listConversations(LEGACY_UNASSIGNED_ACCOUNT_ID)).toHaveLength(1);
      expect(content.listMedia(LEGACY_UNASSIGNED_ACCOUNT_ID)).toHaveLength(1);
      expect(content.getSyncState(LEGACY_UNASSIGNED_ACCOUNT_ID)?.nextBatch).toBe('cursor-one');
      expect(importLegacyAccountContent(db, dataDirectory).skipped).toBe(true);
    } finally {
      fs.rmSync(dataDirectory, { recursive: true, force: true });
    }
  });
});