import { describe, it, expect } from 'vitest';
import { LeaderboardsViewDataBuilder } from './LeaderboardsViewDataBuilder';

describe('LeaderboardsViewDataBuilder', () => {
  describe('happy paths', () => {
    it('should transform Leaderboards DTO to LeaderboardsViewData correctly', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            {
              id: 'driver-1',
              name: 'John Doe',
              rating: 1234.56,
              skillLevel: 'pro',
              nationality: 'USA',
              racesCompleted: 150,
              wins: 25,
              podiums: 60,
              isActive: true,
              rank: 1,
              avatarUrl: 'https://example.com/avatar1.jpg',
            },
            {
              id: 'driver-2',
              name: 'Jane Smith',
              rating: 1100.0,
              skillLevel: 'advanced',
              nationality: 'Canada',
              racesCompleted: 100,
              wins: 15,
              podiums: 40,
              isActive: true,
              rank: 2,
              avatarUrl: 'https://example.com/avatar2.jpg',
            },
          ],
          totalRaces: 250,
          totalWins: 40,
          activeCount: 2,
        },
        teams: {
          teams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              logoUrl: 'https://example.com/logo1.jpg',
              memberCount: 15,
              rating: 1500,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
            {
              id: 'team-2',
              name: 'Speed Demons',
              tag: 'SD',
              logoUrl: 'https://example.com/logo2.jpg',
              memberCount: 8,
              rating: 1200,
              totalWins: 20,
              totalRaces: 150,
              performanceLevel: 'advanced',
              isRecruiting: true,
              createdAt: '2023-06-01',
            },
          ],
          recruitingCount: 5,
          groupsBySkillLevel: 'pro,advanced,intermediate',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              logoUrl: 'https://example.com/logo1.jpg',
              memberCount: 15,
              rating: 1500,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
            {
              id: 'team-2',
              name: 'Speed Demons',
              tag: 'SD',
              logoUrl: 'https://example.com/logo2.jpg',
              memberCount: 8,
              rating: 1200,
              totalWins: 20,
              totalRaces: 150,
              performanceLevel: 'advanced',
              isRecruiting: true,
              createdAt: '2023-06-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      // Verify drivers
      expect(result.drivers).toHaveLength(2);
      expect(result.drivers[0].id).toBe('driver-1');
      expect(result.drivers[0].name).toBe('John Doe');
      expect(result.drivers[0].rating).toBe(1234.56);
      expect(result.drivers[0].skillLevel).toBe('pro');
      expect(result.drivers[0].nationality).toBe('USA');
      expect(result.drivers[0].wins).toBe(25);
      expect(result.drivers[0].podiums).toBe(60);
      expect(result.drivers[0].racesCompleted).toBe(150);
      expect(result.drivers[0].rank).toBe(1);
      expect(result.drivers[0].avatarUrl).toBe('https://example.com/avatar1.jpg');
      expect(result.drivers[0].position).toBe(1);

      // Verify teams
      expect(result.teams).toHaveLength(2);
      expect(result.teams[0].id).toBe('team-1');
      expect(result.teams[0].name).toBe('Racing Team Alpha');
      expect(result.teams[0].tag).toBe('RTA');
      expect(result.teams[0].memberCount).toBe(15);
      expect(result.teams[0].totalWins).toBe(50);
      expect(result.teams[0].totalRaces).toBe(200);
      expect(result.teams[0].logoUrl).toBe('https://example.com/logo1.jpg');
      expect(result.teams[0].position).toBe(1);
      expect(result.teams[0].isRecruiting).toBe(false);
      expect(result.teams[0].performanceLevel).toBe('elite');
      expect(result.teams[0].rating).toBe(1500);
      expect(result.teams[0].category).toBeUndefined();
    });

    it('should handle empty driver and team arrays', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [],
          totalRaces: 0,
          totalWins: 0,
          activeCount: 0,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.drivers).toEqual([]);
      expect(result.teams).toEqual([]);
    });

    it('should handle missing avatar URLs with empty string fallback', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            {
              id: 'driver-1',
              name: 'John Doe',
              rating: 1234.56,
              skillLevel: 'pro',
              nationality: 'USA',
              racesCompleted: 150,
              wins: 25,
              podiums: 60,
              isActive: true,
              rank: 1,
            },
          ],
          totalRaces: 150,
          totalWins: 25,
          activeCount: 1,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              memberCount: 15,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.drivers[0].avatarUrl).toBe('');
      expect(result.teams[0].logoUrl).toBe('');
    });

    it('should handle missing optional team fields with defaults', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [],
          totalRaces: 0,
          totalWins: 0,
          activeCount: 0,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              memberCount: 15,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.teams[0].rating).toBe(0);
      expect(result.teams[0].logoUrl).toBe('');
    });

    it('should calculate position based on index', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            { id: 'driver-1', name: 'Driver 1', rating: 1000, skillLevel: 'pro', nationality: 'USA', racesCompleted: 100, wins: 10, podiums: 30, isActive: true, rank: 1 },
            { id: 'driver-2', name: 'Driver 2', rating: 900, skillLevel: 'advanced', nationality: 'Canada', racesCompleted: 80, wins: 8, podiums: 25, isActive: true, rank: 2 },
            { id: 'driver-3', name: 'Driver 3', rating: 800, skillLevel: 'intermediate', nationality: 'UK', racesCompleted: 60, wins: 5, podiums: 15, isActive: true, rank: 3 },
          ],
          totalRaces: 240,
          totalWins: 23,
          activeCount: 3,
        },
        teams: {
          teams: [],
          recruitingCount: 1,
          groupsBySkillLevel: 'elite,advanced,intermediate',
          topTeams: [
            { id: 'team-1', name: 'Team 1', tag: 'T1', memberCount: 10, totalWins: 30, totalRaces: 150, performanceLevel: 'elite', isRecruiting: false, createdAt: '2023-01-01' },
            { id: 'team-2', name: 'Team 2', tag: 'T2', memberCount: 8, totalWins: 20, totalRaces: 120, performanceLevel: 'advanced', isRecruiting: true, createdAt: '2023-02-01' },
            { id: 'team-3', name: 'Team 3', tag: 'T3', memberCount: 6, totalWins: 10, totalRaces: 80, performanceLevel: 'intermediate', isRecruiting: false, createdAt: '2023-03-01' },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.drivers[0].position).toBe(1);
      expect(result.drivers[1].position).toBe(2);
      expect(result.drivers[2].position).toBe(3);

      expect(result.teams[0].position).toBe(1);
      expect(result.teams[1].position).toBe(2);
      expect(result.teams[2].position).toBe(3);
    });
  });

  describe('data transformation', () => {
    it('should preserve all DTO fields in the output', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            {
              id: 'driver-123',
              name: 'John Doe',
              rating: 1234.56,
              skillLevel: 'pro',
              nationality: 'USA',
              racesCompleted: 150,
              wins: 25,
              podiums: 60,
              isActive: true,
              rank: 1,
              avatarUrl: 'https://example.com/avatar.jpg',
            },
          ],
          totalRaces: 150,
          totalWins: 25,
          activeCount: 1,
        },
        teams: {
          teams: [],
          recruitingCount: 5,
          groupsBySkillLevel: 'pro,advanced',
          topTeams: [
            {
              id: 'team-123',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              logoUrl: 'https://example.com/logo.jpg',
              memberCount: 15,
              rating: 1500,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.drivers[0].name).toBe(leaderboardsDTO.drivers.drivers[0].name);
      expect(result.drivers[0].nationality).toBe(leaderboardsDTO.drivers.drivers[0].nationality);
      expect(result.drivers[0].avatarUrl).toBe(leaderboardsDTO.drivers.drivers[0].avatarUrl);
      expect(result.teams[0].name).toBe(leaderboardsDTO.teams.topTeams[0].name);
      expect(result.teams[0].tag).toBe(leaderboardsDTO.teams.topTeams[0].tag);
      expect(result.teams[0].logoUrl).toBe(leaderboardsDTO.teams.topTeams[0].logoUrl);
    });

    it('should not modify the input DTO', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            {
              id: 'driver-123',
              name: 'John Doe',
              rating: 1234.56,
              skillLevel: 'pro',
              nationality: 'USA',
              racesCompleted: 150,
              wins: 25,
              podiums: 60,
              isActive: true,
              rank: 1,
              avatarUrl: 'https://example.com/avatar.jpg',
            },
          ],
          totalRaces: 150,
          totalWins: 25,
          activeCount: 1,
        },
        teams: {
          teams: [],
          recruitingCount: 5,
          groupsBySkillLevel: 'pro,advanced',
          topTeams: [
            {
              id: 'team-123',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              logoUrl: 'https://example.com/logo.jpg',
              memberCount: 15,
              rating: 1500,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const originalDTO = JSON.parse(JSON.stringify(leaderboardsDTO));
      LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(leaderboardsDTO).toEqual(originalDTO);
    });

    it('should handle large numbers correctly', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            {
              id: 'driver-1',
              name: 'John Doe',
              rating: 999999.99,
              skillLevel: 'pro',
              nationality: 'USA',
              racesCompleted: 10000,
              wins: 2500,
              podiums: 5000,
              isActive: true,
              rank: 1,
              avatarUrl: 'https://example.com/avatar.jpg',
            },
          ],
          totalRaces: 10000,
          totalWins: 2500,
          activeCount: 1,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              logoUrl: 'https://example.com/logo.jpg',
              memberCount: 100,
              rating: 999999,
              totalWins: 5000,
              totalRaces: 10000,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.drivers[0].rating).toBe(999999.99);
      expect(result.drivers[0].wins).toBe(2500);
      expect(result.drivers[0].podiums).toBe(5000);
      expect(result.drivers[0].racesCompleted).toBe(10000);
      expect(result.teams[0].rating).toBe(999999);
      expect(result.teams[0].totalWins).toBe(5000);
      expect(result.teams[0].totalRaces).toBe(10000);
    });
  });

  describe('edge cases', () => {
    it('should handle null/undefined avatar URLs', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            {
              id: 'driver-1',
              name: 'John Doe',
              rating: 1234.56,
              skillLevel: 'pro',
              nationality: 'USA',
              racesCompleted: 150,
              wins: 25,
              podiums: 60,
              isActive: true,
              rank: 1,
              avatarUrl: null as any,
            },
          ],
          totalRaces: 150,
          totalWins: 25,
          activeCount: 1,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              logoUrl: undefined as any,
              memberCount: 15,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.drivers[0].avatarUrl).toBe('');
      expect(result.teams[0].logoUrl).toBe('');
    });

    it('should handle null/undefined rating', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [
            {
              id: 'driver-1',
              name: 'John Doe',
              rating: null as any,
              skillLevel: 'pro',
              nationality: 'USA',
              racesCompleted: 150,
              wins: 25,
              podiums: 60,
              isActive: true,
              rank: 1,
            },
          ],
          totalRaces: 150,
          totalWins: 25,
          activeCount: 1,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              memberCount: 15,
              rating: null as any,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.drivers[0].rating).toBeNull();
      expect(result.teams[0].rating).toBe(0);
    });

    it('should handle null/undefined totalWins and totalRaces', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [],
          totalRaces: 0,
          totalWins: 0,
          activeCount: 0,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              memberCount: 15,
              totalWins: null as any,
              totalRaces: null as any,
              performanceLevel: 'elite',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.teams[0].totalWins).toBe(0);
      expect(result.teams[0].totalRaces).toBe(0);
    });

    it('should handle empty performance level', () => {
      const leaderboardsDTO = {
        drivers: {
          drivers: [],
          totalRaces: 0,
          totalWins: 0,
          activeCount: 0,
        },
        teams: {
          teams: [],
          recruitingCount: 0,
          groupsBySkillLevel: '',
          topTeams: [
            {
              id: 'team-1',
              name: 'Racing Team Alpha',
              tag: 'RTA',
              memberCount: 15,
              totalWins: 50,
              totalRaces: 200,
              performanceLevel: '',
              isRecruiting: false,
              createdAt: '2023-01-01',
            },
          ],
        },
      };

      const result = LeaderboardsViewDataBuilder.build(leaderboardsDTO);

      expect(result.teams[0].performanceLevel).toBe('N/A');
    });
  });
});