import { describe, it, expect, vi, beforeEach } from 'vitest';
import type { Page } from 'playwright';
import { ResponseCheckerService as BaseResponseCheckerService } from '../src/services/response-checker.js';
import type { MessagesRepository, SuccessfulMessagesRepository, SentMessageRecord, ProcessedPostRecord } from '../src/database/repositories.js';
import type { PostsRepository } from '../src/database/repositories.js';
import { createMockLogger } from '../tests/mockLogger.js';
import { authenticatedAccountAuth } from './testUtils.js';

class ResponseCheckerService extends BaseResponseCheckerService {
  constructor(
    page: Page,
    messagesRepo: MessagesRepository,
    successfulMessagesRepo: SuccessfulMessagesRepository,
    postsRepo: PostsRepository,
    logger: ReturnType<typeof createMockLogger>,
  ) {
    super(
      page,
      messagesRepo,
      successfulMessagesRepo,
      postsRepo,
      logger,
      authenticatedAccountAuth,
    );
  }
}

function createMockPage(): Page {
  return {
    goto: vi.fn(async () => {}),
    waitForTimeout: vi.fn(async () => {}),
    $: vi.fn(async () => null),
    $$: vi.fn(async () => []),
    evaluate: vi.fn(async () => false),
  } as unknown as Page;
}

function createMockMessagesRepo(messages: SentMessageRecord[] = []): MessagesRepository {
  return {
    insert: vi.fn(() => 1),
    getByPostId: vi.fn(() => undefined),
    getRecent: vi.fn(() => []),
    getUncheckedMessages: vi.fn(() => messages),
    markGotResponse: vi.fn(),
    markChecked: vi.fn(),
    hasSentTo: vi.fn(() => false),
    getStrategyStats: vi.fn(() => []),
    getSubredditStats: vi.fn(() => []),
    getResponseRateTrend: vi.fn(() => []),
  } as unknown as MessagesRepository;
}

function createMockSuccessfulMessagesRepo(): SuccessfulMessagesRepository {
  return {
    insert: vi.fn(),
    existsByMessage: vi.fn(() => false),
    getRecent: vi.fn(() => []),
    getWeightedExamples: vi.fn(() => []),
    count: vi.fn(() => 0),
  } as unknown as SuccessfulMessagesRepository;
}

function createMockPostsRepo(posts: Map<string, ProcessedPostRecord> = new Map()): PostsRepository {
  return {
    isProcessed: vi.fn(() => false),
    insert: vi.fn(),
    updateAnalysis: vi.fn(),
    markMessageSent: vi.fn(),
    setError: vi.fn(),
    getById: vi.fn((id: string) => posts.get(id)),
    getByAuthor: vi.fn(() => []),
  } as unknown as PostsRepository;
}

describe('ResponseCheckerService', () => {
  let checker: ResponseCheckerService;
  let logger: ReturnType<typeof createMockLogger>;
  let page: Page;
  let messagesRepo: MessagesRepository;
  let successfulMessagesRepo: SuccessfulMessagesRepository;
  let postsRepo: PostsRepository;

  beforeEach(() => {
    logger = createMockLogger();
    page = createMockPage();
    messagesRepo = createMockMessagesRepo();
    successfulMessagesRepo = createMockSuccessfulMessagesRepo();
    postsRepo = createMockPostsRepo();
    checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);
  });

  describe('checkForResponses', () => {
    it('returns empty when no unchecked messages', async () => {
      const results = await checker.checkForResponses();
      expect(results).toEqual([]);
    });

    it('checks messages and marks responses', async () => {
      const message: SentMessageRecord = {
        id: 1,
        postId: 'post1',
        recipient: 'user1',
        subject: 'Hello',
        message: 'Hey!',
        sentAt: Date.now() - 2 * 3600000, // 2 hours ago
        gotResponse: false,
        responseCheckedAt: null,
        strategyId: null,
      };
      messagesRepo = createMockMessagesRepo([message]);
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      // Mock inbox to have a reply from user1
      const mockItem = {
        $: vi.fn(async (selector: string) => {
          if (selector.includes('.author') || selector.includes('message-author') || selector.includes('.sender')) {
            return { textContent: vi.fn(async () => 'user1') };
          }
          if (selector.includes('.md') || selector.includes('.message-body')) {
            return { textContent: vi.fn(async () => 'Yes, I\'d love that!') };
          }
          return null;
        }),
        evaluate: vi.fn(async () => true),
      };
      vi.mocked(page.$$).mockResolvedValue([mockItem as any]);
      vi.mocked(page.$).mockImplementation(async (selector: string) => {
        if (selector.includes('.author') || selector.includes('message-author') || selector.includes('.sender')) {
          return mockItem.$('.author') as any;
        }
        if (selector.includes('.md') || selector.includes('.message-body')) {
          return mockItem.$('.md') as any;
        }
        return null;
      });

      const results = await checker.checkForResponses();
      expect(results.length).toBeGreaterThan(0);
      expect(messagesRepo.markGotResponse).toHaveBeenCalled();
    });

    it('marks messages as checked when no response', async () => {
      const message: SentMessageRecord = {
        id: 1,
        postId: 'post1',
        recipient: 'user1',
        subject: 'Hello',
        message: 'Hey!',
        sentAt: Date.now() - 2 * 3600000,
        gotResponse: false,
        responseCheckedAt: null,
        strategyId: null,
      };
      messagesRepo = createMockMessagesRepo([message]);
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      // No replies in inbox
      vi.mocked(page.$$).mockResolvedValue([]);

      const results = await checker.checkForResponses();
      expect(messagesRepo.markChecked).toHaveBeenCalled();
    });

    it('does not track an unassociated reply as performance', async () => {
      const message: SentMessageRecord = {
        id: 1,
        postId: null,
        recipient: 'user1',
        subject: 'Hello',
        message: 'Hey!',
        sentAt: Date.now() - 2 * 3600000,
        gotResponse: false,
        responseCheckedAt: null,
        strategyId: null,
        chatRoomId: '!room:reddit.com',
      };
      messagesRepo = createMockMessagesRepo([message]);
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);
      const mockItem = {
        $: vi.fn(async (selector: string) => selector.includes('author') || selector.includes('sender')
          ? { textContent: vi.fn(async () => 'user1') }
          : { textContent: vi.fn(async () => 'Hi there') }),
        evaluate: vi.fn(async () => true),
      };
      vi.mocked(page.$$).mockResolvedValue([mockItem as any]);

      const results = await checker.checkForResponses();

      expect(results).toEqual([
        expect.objectContaining({ messageId: 1, gotResponse: true }),
      ]);
      expect(messagesRepo.markGotResponse).not.toHaveBeenCalled();
      expect(messagesRepo.markChecked).toHaveBeenCalledWith(1);
      expect(successfulMessagesRepo.insert).not.toHaveBeenCalled();
    });

    it('stores successful messages for learning', async () => {
      const post: ProcessedPostRecord = {
        id: 'post1',
        subreddit: 'gonewild',
        author: 'poster1',
        title: 'My selfie',
        imageUrl: 'http://example.com/img.jpg',
        imageAnalysis: 'Beautiful woman',
        generatedMessage: 'Hey gorgeous!',
        processedAt: Date.now(),
        messageSent: true,
        error: null,
      };

      const message: SentMessageRecord = {
        id: 1,
        postId: 'post1',
        recipient: 'user1',
        subject: 'Hello',
        message: 'Hey gorgeous!',
        sentAt: Date.now() - 2 * 3600000,
        gotResponse: false,
        responseCheckedAt: null,
        strategyId: null,
      };

      messagesRepo = createMockMessagesRepo([message]);
      postsRepo = createMockPostsRepo(new Map([['post1', post]]));
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      const mockItem = {
        $: vi.fn(async (selector: string) => {
          if (selector.includes('.author') || selector.includes('message-author') || selector.includes('.sender')) {
            return { textContent: vi.fn(async () => 'user1') };
          }
          if (selector.includes('.md') || selector.includes('.message-body')) {
            return { textContent: vi.fn(async () => 'Thanks!') };
          }
          return null;
        }),
        evaluate: vi.fn(async () => true),
      };
      vi.mocked(page.$$).mockResolvedValue([mockItem as any]);
      vi.mocked(page.$).mockImplementation(async (selector: string) => {
        if (selector.includes('.author') || selector.includes('message-author') || selector.includes('.sender')) {
          return mockItem.$('.author') as any;
        }
        return null;
      });

      await checker.checkForResponses();
      expect(successfulMessagesRepo.insert).toHaveBeenCalled();

      const insertCall = vi.mocked(successfulMessagesRepo.insert).mock.calls[0][0];
      expect(insertCall.originalMessage).toBe('Hey gorgeous!');
      expect(insertCall.imageAnalysis).toBe('Beautiful woman');
      expect(insertCall.postTitle).toBe('My selfie');
      expect(insertCall.subreddit).toBe('gonewild');
    });

    it('does not turn a declined reply into a learning example', async () => {
      const message: SentMessageRecord = {
        id: 1, postId: 'post1', recipient: 'user1', subject: 'Hello', message: 'Hey!',
        sentAt: Date.now() - 2 * 3600000, gotResponse: false, responseCheckedAt: null, strategyId: null,
      };
      messagesRepo = createMockMessagesRepo([message]);
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);
      const mockItem = {
        $: vi.fn(async (selector: string) => selector.includes('author') || selector.includes('sender')
          ? { textContent: vi.fn(async () => 'user1') }
          : { textContent: vi.fn(async () => 'No thanks, not interested') }),
        evaluate: vi.fn(async () => true),
      };
      vi.mocked(page.$$).mockResolvedValue([mockItem as any]);
      await checker.checkForResponses();

      expect(messagesRepo.markGotResponse).toHaveBeenCalledWith(1);
      expect(successfulMessagesRepo.insert).not.toHaveBeenCalled();
    });

    it('handles inbox parsing errors gracefully', async () => {
      const message: SentMessageRecord = {
        id: 1,
        postId: 'post1',
        recipient: 'user1',
        subject: 'Hello',
        message: 'Hey!',
        sentAt: Date.now() - 2 * 3600000,
        gotResponse: false,
        responseCheckedAt: null,
        strategyId: null,
      };
      messagesRepo = createMockMessagesRepo([message]);
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      vi.mocked(page.$$).mockRejectedValue(new Error('DOM error'));

      const results = await checker.checkForResponses();
      // Should not throw
      expect(Array.isArray(results)).toBe(true);
    });
  });

  describe('getSuccessfulExamples', () => {
    it('returns formatted examples', () => {
      const mockSuccessful = [
        {
          id: 1,
          sentMessageId: 1,
          originalMessage: 'Hey gorgeous!',
          imageAnalysis: 'Blonde woman, rating 8/10',
          postTitle: 'My selfie',
          responseSnippet: 'Thanks!',
          subreddit: 'gonewild',
          createdAt: Date.now(),
        },
      ];
      successfulMessagesRepo = {
        getRecent: vi.fn(() => mockSuccessful),
        getWeightedExamples: vi.fn(() => mockSuccessful),
        insert: vi.fn(),
        existsByMessage: vi.fn(() => false),
        count: vi.fn(() => 1),
      } as unknown as SuccessfulMessagesRepository;
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      const examples = checker.getSuccessfulExamples(3);
      expect(examples.length).toBe(1);
      expect(examples[0]).toContain('Hey gorgeous!');
      expect(examples[0]).toContain('Blonde woman');
      expect(examples[0]).toContain('My selfie');
      expect(examples[0]).toContain('Thanks!');
    });

    it('returns empty when no successful messages', () => {
      successfulMessagesRepo = {
        getRecent: vi.fn(() => []),
        getWeightedExamples: vi.fn(() => []),
        insert: vi.fn(),
        existsByMessage: vi.fn(() => false),
        count: vi.fn(() => 0),
      } as unknown as SuccessfulMessagesRepository;
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      const examples = checker.getSuccessfulExamples(3);
      expect(examples).toEqual([]);
    });

    it('uses weighted examples for specific subreddit', () => {
      const mockSuccessful = [
        {
          id: 1,
          sentMessageId: 1,
          originalMessage: 'Hey!',
          imageAnalysis: null,
          postTitle: null,
          responseSnippet: null,
          subreddit: 'gonewild',
          createdAt: Date.now(),
        },
      ];
      successfulMessagesRepo = {
        getRecent: vi.fn(() => []),
        getWeightedExamples: vi.fn(() => mockSuccessful),
        insert: vi.fn(),
        existsByMessage: vi.fn(() => false),
        count: vi.fn(() => 1),
      } as unknown as SuccessfulMessagesRepository;
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      checker.getSuccessfulExamples(3, 'gonewild');
      expect(successfulMessagesRepo.getWeightedExamples).toHaveBeenCalledWith('gonewild', 3);
    });

    it('truncates long snippets', () => {
      const mockSuccessful = [
        {
          id: 1,
          sentMessageId: 1,
          originalMessage: 'x'.repeat(500),
          imageAnalysis: 'x'.repeat(500),
          postTitle: 'Short',
          responseSnippet: 'x'.repeat(500),
          subreddit: null,
          createdAt: Date.now(),
        },
      ];
      successfulMessagesRepo = {
        getRecent: vi.fn(() => mockSuccessful),
        getWeightedExamples: vi.fn(() => mockSuccessful),
        insert: vi.fn(),
        existsByMessage: vi.fn(() => false),
        count: vi.fn(() => 1),
      } as unknown as SuccessfulMessagesRepository;
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      const examples = checker.getSuccessfulExamples(1);
      // imageAnalysis should be truncated to 300 chars + "..."
      expect(examples[0]).toContain('...');
    });
  });

  describe('getSuccessCount', () => {
    it('returns the count from repository', () => {
      successfulMessagesRepo = {
        getRecent: vi.fn(() => []),
        getWeightedExamples: vi.fn(() => []),
        insert: vi.fn(),
        existsByMessage: vi.fn(() => false),
        count: vi.fn(() => 42),
      } as unknown as SuccessfulMessagesRepository;
      checker = new ResponseCheckerService(page, messagesRepo, successfulMessagesRepo, postsRepo, logger);

      expect(checker.getSuccessCount()).toBe(42);
    });
  });
});