/**
 * E2E Test: Elo Rating Updates
 * 
 * Tests that Elo ratings are correctly updated when matches are added
 */

import { test, expect } from '@playwright/test';
import { prisma } from '@/lib/prisma';
import fs from 'fs';
import path from 'path';


test.describe('Elo Rating Updates', () => {
  test.beforeAll(async () => {
    // Clean up any existing test data
    // First delete matches that reference players
    await prisma.match.deleteMany({
      where: {
        OR: [
          { player1P1Id: { in: await getEloTestPlayerIds() } },
          { player1P2Id: { in: await getEloTestPlayerIds() } },
          { player2P1Id: { in: await getEloTestPlayerIds() } },
          { player2P2Id: { in: await getEloTestPlayerIds() } },
        ]
      }
    });
    
    // Then delete partnerships
    await prisma.partnershipStat.deleteMany({
      where: {
        OR: [
          { player1Id: { in: await getEloTestPlayerIds() } },
          { player2Id: { in: await getEloTestPlayerIds() } },
        ]
      }
    });
    
    // Finally delete players
    await prisma.player.deleteMany({
      where: {
        name: {
          startsWith: 'Elo Test'
        }
      }
    });
  });

  test.afterAll(async () => {
    // Clean up test data
    // First delete matches that reference players
    await prisma.match.deleteMany({
      where: {
        OR: [
          { player1P1Id: { in: await getEloTestPlayerIds() } },
          { player1P2Id: { in: await getEloTestPlayerIds() } },
          { player2P1Id: { in: await getEloTestPlayerIds() } },
          { player2P2Id: { in: await getEloTestPlayerIds() } },
        ]
      }
    });
    
    // Then delete partnerships
    await prisma.partnershipStat.deleteMany({
      where: {
        OR: [
          { player1Id: { in: await getEloTestPlayerIds() } },
          { player2Id: { in: await getEloTestPlayerIds() } },
        ]
      }
    });
    
    // Finally delete players
    await prisma.player.deleteMany({
      where: {
        name: {
          startsWith: 'Elo Test'
        }
      }
    });
    await prisma.$disconnect();
  });
  
  async function getEloTestPlayerIds(): Promise<number[]> {
    const players = await prisma.player.findMany({
      where: {
        name: {
          startsWith: 'Elo Test'
        }
      },
      select: { id: true }
    });
    return players.map(p => p.id);
  }

  test('Elo rating updates after match upload', async ({ page }) => {
    // Step 1: Create test players with known initial ratings
    const player1 = await prisma.player.create({
      data: {
        name: 'Elo Test Player 1',
        normalizedName: 'elo test player 1',
        currentElo: 1500,
        gamesPlayed: 0,
        wins: 0,
        losses: 0,
      },
    });

    const player2 = await prisma.player.create({
      data: {
        name: 'Elo Test Player 2',
        normalizedName: 'elo test player 2',
        currentElo: 1500,
        gamesPlayed: 0,
        wins: 0,
        losses: 0,
      },
    });

    const player3 = await prisma.player.create({
      data: {
        name: 'Elo Test Player 3',
        normalizedName: 'elo test player 3',
        currentElo: 1500,
        gamesPlayed: 0,
        wins: 0,
        losses: 0,
      },
    });

    const player4 = await prisma.player.create({
      data: {
        name: 'Elo Test Player 4',
        normalizedName: 'elo test player 4',
        currentElo: 1500,
        gamesPlayed: 0,
        wins: 0,
        losses: 0,
      },
    });

    // Step 2: Use existing admin user from global setup
    // The global setup creates an admin user with email starting with 'setup-admin-'
    // We'll find that user and use it for the test
    const existingAdmin = await prisma.user.findFirst({
      where: {
        email: { startsWith: 'setup-admin-' },
        role: 'club_admin'
      },
      orderBy: { createdAt: 'desc' }
    });
    
    if (!existingAdmin) {
      throw new Error('No existing admin user found. Please run global setup first.');
    }
    
    const adminEmail = existingAdmin.email;
    const adminPassword = 'AdminPassword123!';  // Password from global setup
    const adminUser = existingAdmin;
    
    console.log('Using existing admin user:', adminEmail);
    console.log('Admin user ID:', adminUser.id);
    console.log('Admin user role:', adminUser.role);
    
    // Create tournament owned by admin user
    console.log('Creating tournament with ownerId:', adminUser.id);
    const tournament = await prisma.event.create({
      data: {
        name: 'Elo Test Multi Tournament',
        eventType: 'tournament',
        status: 'planned',
        ownerId: adminUser.id,
      },
    });
    console.log('Tournament created with ID:', tournament.id);
    console.log('Tournament status:', tournament.status);
    
    // Verify tournament was created and can be found
    const tournamentCheck = await prisma.event.findUnique({
      where: { id: tournament.id }
    });
    console.log('Tournament verified:', tournamentCheck ? 'yes' : 'no');
    console.log('Tournament owner ID:', tournamentCheck?.ownerId);
    console.log('Current user ID:', adminUser.id);
    console.log('Owner matches:', tournamentCheck?.ownerId === adminUser.id);
    
    // Step 3: Use existing session from global setup
    // Navigate to admin page to check if we're already logged in
    // Set up console listener to catch server logs
    page.on('console', msg => {
      console.log('SERVER LOG:', msg.text());
    });
    
    await page.goto('/admin');
    await page.waitForLoadState('domcontentloaded');
    
    // Check if we're logged in
    const content = await page.content();
    const isLoggedIn = content.includes('Sign out');
    console.log('User is logged in:', isLoggedIn);
    console.log('Page title:', await page.title());
    console.log('Current URL:', page.url());
    
    // Check if there's a login form
    const hasLoginForm = content.includes('Sign in to your account');
    console.log('Has login form:', hasLoginForm);
    
    // If the URL is a player profile, we're logged in but as a regular user
    // In that case, we need to log out and log in as admin
    if (page.url().includes('/players/')) {
      console.log('User is logged in but redirected to player profile (not admin)');
      console.log('Logging out and logging in as admin...');
      await page.click('button:has-text("Sign out")');
      await page.waitForURL('/auth/login');
      await page.waitForLoadState('domcontentloaded');
    }
    
    if (!isLoggedIn || page.url().includes('/players/')) {
      // If not logged in or logged in as regular user, log in as admin
      console.log('Logging in as admin...');
      await page.goto('/auth/login');
      await page.waitForLoadState('domcontentloaded');
      await page.fill('input[name="email"]', adminEmail);
      await page.fill('input[name="password"]', adminPassword);
      await page.click('button[type="submit"]');
      await page.waitForURL(/\/(admin|players)/, { timeout: 10000 });
      await page.waitForLoadState('domcontentloaded');
    }
    
    // Verify tournament ownership
    const tournamentVerify = await prisma.event.findUnique({
      where: { id: tournament.id }
    });
    console.log('Tournament owner ID:', tournamentVerify?.ownerId);
    console.log('Current user ID:', adminUser.id);
    console.log('Owner matches:', tournamentVerify?.ownerId === adminUser.id);
    
    // Navigate to match upload page
    await page.goto('/admin/matches/upload');
    
    // Wait for page to load and tournaments to be fetched
    await page.waitForLoadState('domcontentloaded');
    await page.waitForTimeout(2000);
    
    // Wait for tournament dropdown to be ready
    await page.waitForSelector('select#tournament', { timeout: 5000 });
    
    // Wait a bit for tournaments to load
    await page.waitForTimeout(2000);
    
    // Select the tournament manually
    const tournamentSelect = await page.locator('select#tournament');
    console.log('Selecting tournament ID:', tournament.id);
    await tournamentSelect.selectOption({ value: tournament.id.toString() });
    
    // Wait for React state to update
    await page.waitForTimeout(500);
    
    // Verify the selection
    const selectedTournament = await tournamentSelect.inputValue();
    console.log('Tournament selected in dropdown:', selectedTournament);
    console.log('Expected tournament ID:', tournament.id);
    
    if (selectedTournament !== tournament.id.toString()) {
      console.log('WARNING: Tournament selection mismatch!');
    }
    
    // Check if there's a permission error on the page
    const uploadContent = await page.content();
    if (uploadContent.includes('Insufficient permissions')) {
      console.log('ERROR: Permission error detected on page');
      console.log('Page URL:', page.url());
      // Take a screenshot for debugging
      await page.screenshot({ path: '/tmp/permission-error.png' });
      
      // Check the navigation to see current user
      const navContent = await page.locator('nav').textContent();
      console.log('Navigation content:', navContent);
    }
    
    // Create matches where player1/player2 win twice and player3/player4 lose twice
    const csvContent1 = `Event #,Round,Table,Seat 1,Seat 3,Odds Points,Seat 2,Seat 4,Evens Points,Winner
${tournament.id},1,1,${player1.name},${player3.name},10,${player2.name},${player4.name},5,odds`;

    const csvContent2 = `Event #,Round,Table,Seat 1,Seat 3,Odds Points,Seat 2,Seat 4,Evens Points,Winner
${tournament.id},2,1,${player1.name},${player3.name},10,${player2.name},${player4.name},5,odds`;
    
    // Upload first match through UI
    const tmpFile1 = path.join('/tmp', `elo-test-multi-1-${Date.now()}.csv`);
    fs.writeFileSync(tmpFile1, csvContent1);
    
    // Wait for file input to be ready
    await page.waitForSelector('input[type="file"]', { timeout: 5000 });
    
    // Upload the file
    await page.setInputFiles('input[type="file"]', tmpFile1);
    
    // Wait for file to be selected
    await page.waitForTimeout(500);
    
    // Click submit button
    await page.click('button[type="submit"]');
    
    // Wait for upload to complete
    await page.waitForTimeout(3000);
    
    // Check for any error messages
    const uploadContentAfter = await page.content();
    if (uploadContentAfter.includes('error') || uploadContentAfter.includes('Error')) {
      console.log('Upload page has error message');
    }
    
    fs.unlinkSync(tmpFile1);
    
    // Navigate back to upload page for second match
    await page.goto('/admin/matches/upload');
    await page.waitForLoadState('domcontentloaded');
    await page.waitForTimeout(2000);
    
    // Re-select the tournament for the second upload
    await page.waitForSelector('select#tournament', { timeout: 5000 });
    await page.waitForTimeout(1000); // Wait for tournaments to load
    
    const tournamentSelect2 = await page.locator('select#tournament');
    const currentSelection = await tournamentSelect2.inputValue();
    
    // If tournament is not selected, select it manually
    if (!currentSelection || currentSelection !== tournament.id.toString()) {
      console.log('Selecting tournament for second upload:', tournament.id);
      await tournamentSelect2.selectOption({ value: tournament.id.toString() });
      await page.waitForTimeout(500);
    }
    
    // Upload second match through UI
    const tmpFile2 = path.join('/tmp', `elo-test-multi-2-${Date.now()}.csv`);
    fs.writeFileSync(tmpFile2, csvContent2);
    
    await page.setInputFiles('input[type="file"]', tmpFile2);
    await page.waitForTimeout(500);
    await page.click('button[type="submit"]');
    await page.waitForTimeout(2000);
    fs.unlinkSync(tmpFile2);
    
    await page.waitForTimeout(2000);
    
    // Verify ratings after multiple matches
    const updatedPlayer1 = await prisma.player.findUnique({
      where: { id: player1.id }
    });
    
    const updatedPlayer4 = await prisma.player.findUnique({
      where: { id: player4.id }
    });
    
    // Player 1 should have higher rating after 2 wins
    // With K=32, each win gives ~8 Elo points, so 2 wins = ~16 Elo
    // Expected: 1500 + 16 = 1516
    expect(updatedPlayer1?.currentElo).toBeGreaterThan(1500);
    expect(updatedPlayer1?.currentElo).toBeLessThanOrEqual(1520);
    expect(updatedPlayer1?.gamesPlayed).toBe(2);
    expect(updatedPlayer1?.wins).toBe(2);
    
    // Player 4 should have lower rating after 2 losses
    // Expected: 1500 - 16 = 1484
    expect(updatedPlayer4?.currentElo).toBeLessThan(1500);
    expect(updatedPlayer4?.currentElo).toBeGreaterThanOrEqual(1480);
    expect(updatedPlayer4?.gamesPlayed).toBe(2);
    expect(updatedPlayer4?.losses).toBe(2);
  });

  test('Elo ratings are visible on player profile', async ({ page }) => {
    // Create a test player
    const player = await prisma.player.create({
      data: {
        name: 'Elo Test Profile Player',
        normalizedName: 'elo test profile player',
        currentElo: 1750,
        gamesPlayed: 50,
        wins: 30,
        losses: 20,
      },
    });

    // Navigate to player profile
    await page.goto(`/players/${player.id}/profile`);
    
    // Wait for page to load
    await page.waitForLoadState('domcontentloaded');
    
    // Verify rating is displayed (from player.currentElo)
    await expect(page.locator('text=1750')).toBeVisible();
    
    // Total games shown on profile is calculated from partnership stats
    // Since we haven't added any matches yet, it should show 0 or N/A for best partner
    // Just verify the page loads with the Elo rating
    await expect(page.locator('text=Current Elo')).toBeVisible();
  });
});