/**
 * E2E Test: CSV Upload Player Deduplication
 * 
 * Tests that CSV uploads correctly deduplicate players by name
 */

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


test.describe('CSV Upload Player Deduplication', () => {
  let testTournamentId: number;
  const testPlayerIds: number[] = [];
  const ts = Date.now();

  test.beforeAll(async () => {
    // Create a test tournament
    const tournament = await prisma.event.create({
      data: {
        name: 'Deduplication Test Tournament',
        eventDate: new Date(),
        eventType: 'tournament',
        format: 'round_robin',
        status: 'planned',
      },
    });
    testTournamentId = tournament.id;
  });

  test.afterAll(async () => {
    // Clean up test data
    if (testTournamentId) {
      // Delete matches first (they reference players)
      await prisma.match.deleteMany({
        where: { eventId: testTournamentId },
      });

      // Delete event participants
      await prisma.eventParticipant.deleteMany({
        where: { eventId: testTournamentId },
      });

      // Delete test tournament
      await prisma.event.delete({
        where: { id: testTournamentId },
      });
    }

    // Delete test players (those with "Dedupe" or "Aggregate Test" in the name)
    await prisma.player.deleteMany({
      where: {
        OR: [
          { name: { contains: 'Dedupe' } },
          { name: { contains: 'Aggregate Test' } },
          { name: { contains: 'Whitespace' } },
        ],
      },
    });

    await prisma.$disconnect();
  });

  test('should not create duplicate players with different cases', async ({ request }) => {
    // Create a CSV with the same player name in different cases
    const csvContent = `Event #,Round,Table,Seat 1,Seat 3,Odds Points,Seat 2,Seat 4,Evens Points
1,1,1,Dedupe Player,Dedupe Player2,5,Dedupe player,Dedupe PLAYER2,3`;

    // Create a temporary CSV file
    const csvPath = path.join(__dirname, 'temp-deduplication-test.csv');
    fs.writeFileSync(csvPath, csvContent);

    try {
      // Upload the CSV
      const csvFileContent = fs.readFileSync(csvPath, 'utf-8');
      const blob = new Blob([csvFileContent], { type: 'text/csv' });
      const file = new File([blob], 'deduplication-test.csv', { type: 'text/csv' });
      
      const formData = new FormData();
      formData.append('csvFile', file);
      formData.append('eventId', testTournamentId.toString());

      const response = await request.post('/api/matches/upload', {
        multipart: formData,
      });

      expect(response.ok()).toBeTruthy();

      // Check that only 4 unique players were created (not 8)
      const dedupePlayers = await prisma.player.findMany({
        where: {
          name: {
            contains: 'Dedupe',
          },
        },
      });

      // We expect 4 unique players: "Dedupe Player", "Dedupe Player2", "Dedupe player", "Dedupe PLAYER2"
      // But due to normalization, "Dedupe player" should match "Dedupe Player" (case-insensitive)
      // and "Dedupe PLAYER2" should match "Dedupe Player2"
      // So we should have exactly 2 unique players after deduplication
      expect(dedupePlayers.length).toBe(2);

      // Verify the players have the correct names (original case preserved)
      const playerNames = dedupePlayers.map((p: { name: string }) => p.name).sort();
      expect(playerNames).toEqual(['Dedupe Player', 'Dedupe Player2']);

      // Verify each player has games played
      dedupePlayers.forEach((player: { gamesPlayed: number }) => {
        expect(player.gamesPlayed).toBeGreaterThan(0);
      });
    } finally {
      // Clean up temp file
      if (fs.existsSync(csvPath)) {
        fs.unlinkSync(csvPath);
      }
    }
  });

  test('should handle whitespace variations correctly', async ({ request }) => {
    // Create a CSV with whitespace variations
    const csvContent = `Event #,Round,Table,Seat 1,Seat 3,Odds Points,Seat 2,Seat 4,Evens Points
1,1,1, Whitespace Player , Whitespace Player2 ,5,Whitespace  Player, WhitespacePlayer2,3`;

    const csvPath = path.join(__dirname, 'temp-whitespace-test.csv');
    fs.writeFileSync(csvPath, csvContent);

    try {
      const csvFileContent = fs.readFileSync(csvPath, 'utf-8');
      const blob = new Blob([csvFileContent], { type: 'text/csv' });
      const file = new File([blob], 'whitespace-test.csv', { type: 'text/csv' });
      
      const formData = new FormData();
      formData.append('csvFile', file);
      formData.append('eventId', testTournamentId.toString());

      const response = await request.post('/api/matches/upload', {
        multipart: formData,
      });

      expect(response.ok()).toBeTruthy();

      // Check that players were created without extra whitespace
      const whitespacePlayers = await prisma.player.findMany({
        where: {
          name: {
            contains: 'Whitespace',
          },
        },
      });

      // Verify no players have leading/trailing whitespace
      whitespacePlayers.forEach((player: { name: string, normalizedName: string }) => {
        expect(player.name).toBe(player.name.trim());
        expect(player.normalizedName).toBe(player.name.trim().toLowerCase());
      });
    } finally {
      if (fs.existsSync(csvPath)) {
        fs.unlinkSync(csvPath);
      }
    }
  });

  test('should aggregate stats for duplicate players', async ({ request }) => {
    // First, create some players manually to simulate previous uploads
    const player1 = await prisma.player.create({
      data: {
        name: `Aggregate Test ${ts}`,
        normalizedName: `aggregate test ${ts}`,
        currentElo: 1050,
        gamesPlayed: 5,
        wins: 3,
        losses: 2,
      },
    });
    testPlayerIds.push(player1.id);

    // Upload a CSV with the same player name
    const csvContent = `Event #,Round,Table,Seat 1,Seat 3,Odds Points,Seat 2,Seat 4,Evens Points
1,1,1,Aggregate Test ${ts},Test Player 1,5,Test Player 2,Test Player 3,3`;

    const csvPath = path.join(__dirname, 'temp-aggregate-test.csv');
    fs.writeFileSync(csvPath, csvContent);

    try {
      const csvFileContent = fs.readFileSync(csvPath, 'utf-8');
      const blob = new Blob([csvFileContent], { type: 'text/csv' });
      const file = new File([blob], 'aggregate-test.csv', { type: 'text/csv' });
      
      const formData = new FormData();
      formData.append('csvFile', file);
      formData.append('eventId', testTournamentId.toString());

      const response = await request.post('/api/matches/upload', {
        multipart: formData,
      });

      expect(response.ok()).toBeTruthy();

      // Check that the existing player was updated (not duplicated)
      const aggregatePlayers = await prisma.player.findMany({
        where: {
          name: `Aggregate Test ${ts}`,
        },
      });

      // Should still be only one player
      expect(aggregatePlayers.length).toBe(1);

      // Stats should be updated (1 additional game played, 1 additional win)
      const player = aggregatePlayers[0];
      expect(player.gamesPlayed).toBe(6); // 5 + 1
      expect(player.wins).toBe(4); // 3 + 1
      expect(player.losses).toBe(2); // unchanged (team lost)
    } finally {
      if (fs.existsSync(csvPath)) {
        fs.unlinkSync(csvPath);
      }
    }
  });
});