import { describe, it, expect } from 'vitest';
import { TeamRankingsViewDataBuilder } from './TeamRankingsViewDataBuilder';
import type { GetTeamsLeaderboardOutputDTO } from '@/lib/types/generated/GetTeamsLeaderboardOutputDTO';

describe('TeamRankingsViewDataBuilder', () => {
  describe('happy paths', () => {
    it('should transform GetTeamsLeaderboardOutputDTO to TeamRankingsViewData correctly', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        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',
          },
          {
            id: 'team-3',
            name: 'Rookie Racers',
            tag: 'RR',
            logoUrl: 'https://example.com/logo3.jpg',
            memberCount: 5,
            rating: 800,
            totalWins: 5,
            totalRaces: 50,
            performanceLevel: 'intermediate',
            isRecruiting: false,
            createdAt: '2023-09-01',
          },
        ],
        recruitingCount: 5,
        groupsBySkillLevel: 'elite,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 = TeamRankingsViewDataBuilder.build(teamDTO);

      // Verify teams
      expect(result.teams).toHaveLength(3);
      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();

      // Verify podium (top 3)
      expect(result.podium).toHaveLength(3);
      expect(result.podium[0].id).toBe('team-1');
      expect(result.podium[0].position).toBe(1);
      expect(result.podium[1].id).toBe('team-2');
      expect(result.podium[1].position).toBe(2);
      expect(result.podium[2].id).toBe('team-3');
      expect(result.podium[2].position).toBe(3);

      // Verify recruiting count
      expect(result.recruitingCount).toBe(5);
    });

    it('should handle empty team array', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [],
        recruitingCount: 0,
        groupsBySkillLevel: '',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

      expect(result.teams).toEqual([]);
      expect(result.podium).toEqual([]);
      expect(result.recruitingCount).toBe(0);
    });

    it('should handle less than 3 teams for podium', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        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: 2,
        groupsBySkillLevel: 'elite,advanced',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

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

    it('should handle missing avatar URLs with empty string fallback', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          {
            id: 'team-1',
            name: 'Racing Team Alpha',
            tag: 'RTA',
            memberCount: 15,
            totalWins: 50,
            totalRaces: 200,
            performanceLevel: 'elite',
            isRecruiting: false,
            createdAt: '2023-01-01',
          },
        ],
        recruitingCount: 0,
        groupsBySkillLevel: '',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

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

    it('should calculate position based on index', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          { 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' },
          { id: 'team-4', name: 'Team 4', tag: 'T4', memberCount: 4, totalWins: 5, totalRaces: 40, performanceLevel: 'beginner', isRecruiting: true, createdAt: '2023-04-01' },
        ],
        recruitingCount: 2,
        groupsBySkillLevel: 'elite,advanced,intermediate,beginner',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

      expect(result.teams[0].position).toBe(1);
      expect(result.teams[1].position).toBe(2);
      expect(result.teams[2].position).toBe(3);
      expect(result.teams[3].position).toBe(4);
    });
  });

  describe('data transformation', () => {
    it('should preserve all DTO fields in the output', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          {
            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',
          },
        ],
        recruitingCount: 5,
        groupsBySkillLevel: 'elite,advanced',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

      expect(result.teams[0].name).toBe(teamDTO.teams[0].name);
      expect(result.teams[0].tag).toBe(teamDTO.teams[0].tag);
      expect(result.teams[0].logoUrl).toBe(teamDTO.teams[0].logoUrl);
      expect(result.teams[0].memberCount).toBe(teamDTO.teams[0].memberCount);
      expect(result.teams[0].rating).toBe(teamDTO.teams[0].rating);
      expect(result.teams[0].totalWins).toBe(teamDTO.teams[0].totalWins);
      expect(result.teams[0].totalRaces).toBe(teamDTO.teams[0].totalRaces);
      expect(result.teams[0].performanceLevel).toBe(teamDTO.teams[0].performanceLevel);
      expect(result.teams[0].isRecruiting).toBe(teamDTO.teams[0].isRecruiting);
    });

    it('should not modify the input DTO', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          {
            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',
          },
        ],
        recruitingCount: 5,
        groupsBySkillLevel: 'elite,advanced',
        topTeams: [],
      };

      const originalDTO = JSON.parse(JSON.stringify(teamDTO));
      TeamRankingsViewDataBuilder.build(teamDTO);

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

    it('should handle large numbers correctly', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          {
            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',
          },
        ],
        recruitingCount: 0,
        groupsBySkillLevel: '',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

      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 logo URLs', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          {
            id: 'team-1',
            name: 'Racing Team Alpha',
            tag: 'RTA',
            logoUrl: null as any,
            memberCount: 15,
            totalWins: 50,
            totalRaces: 200,
            performanceLevel: 'elite',
            isRecruiting: false,
            createdAt: '2023-01-01',
          },
        ],
        recruitingCount: 0,
        groupsBySkillLevel: '',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

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

    it('should handle null/undefined rating', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          {
            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',
          },
        ],
        recruitingCount: 0,
        groupsBySkillLevel: '',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

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

    it('should handle null/undefined totalWins and totalRaces', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          {
            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',
          },
        ],
        recruitingCount: 0,
        groupsBySkillLevel: '',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

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

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

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

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

    it('should handle position 0', () => {
      const teamDTO: GetTeamsLeaderboardOutputDTO = {
        teams: [
          { id: 'team-1', name: 'Team 1', tag: 'T1', memberCount: 10, totalWins: 30, totalRaces: 150, performanceLevel: 'elite', isRecruiting: false, createdAt: '2023-01-01' },
        ],
        recruitingCount: 0,
        groupsBySkillLevel: '',
        topTeams: [],
      };

      const result = TeamRankingsViewDataBuilder.build(teamDTO);

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