import { describe, it, expect } from 'vitest';

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

const createMockSeason = (overrides: Partial<{
  id: string;
  leagueId: string;
  status: 'pre_draft' | 'draft' | 'active' | 'completed';
}> = {}) => ({
  id: 'season-1',
  leagueId: 'league-1',
  year: 2025,
  status: 'pre_draft' as const,
  templateId: null,
  draftRounds: 20,
  flexSpots: 0,
  draftDateTime: null,
  draftInitialTime: 120,
  draftIncrementTime: 15,
  currentPickNumber: null,
  draftStartedAt: null,
  draftPaused: false,
  inviteCode: 'TEST123',
  pointsFor1st: 100,
  pointsFor2nd: 70,
  pointsFor3rd: 50,
  pointsFor4th: 40,
  pointsFor5th: 25,
  pointsFor6th: 25,
  pointsFor7th: 15,
  pointsFor8th: 15,
  createdAt: new Date('2025-01-01'),
  updatedAt: new Date('2025-01-01'),
  ...overrides,
});

type MockSeason = ReturnType<typeof createMockSeason>;

// Mirrors the access-control and redirect logic from the pre-draft rankings loader.
// Returns null for a successful load, a redirect URL, or an error object.
function checkPreDraftRankingsAccess(opts: {
  leagueId: string;
  season: MockSeason;
  userId: string | null;
  hasTeam: boolean;
}): { redirect: string } | { status: number; message: string } | null {
  const { leagueId, season, userId, hasTeam } = opts;
  const { id: seasonId } = season;

  if (season.status === 'draft') {
    return { redirect: `/leagues/${leagueId}/draft/${seasonId}` };
  }
  if (season.status === 'active' || season.status === 'completed') {
    return { redirect: `/leagues/${leagueId}/draft-board/${seasonId}` };
  }

  if (!userId) {
    return { status: 401, message: 'You must be logged in to set pre-draft queue' };
  }

  if (!hasTeam) {
    return { status: 403, message: 'You do not have a team in this season' };
  }

  return null;
}

// ---------------------------------------------------------------------------
// Redirect behaviour based on season status
// ---------------------------------------------------------------------------

describe('Set Pre-Draft Queue Access - Season Status Redirects', () => {
  it('redirects to the draft room when status is draft', () => {
    const season = createMockSeason({ status: 'draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'user-1',
      hasTeam: true,
    });
    expect(result).toEqual({ redirect: '/leagues/league-1/draft/season-1' });
  });

  it('redirects to the draft board when status is active', () => {
    const season = createMockSeason({ status: 'active' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'user-1',
      hasTeam: true,
    });
    expect(result).toEqual({ redirect: '/leagues/league-1/draft-board/season-1' });
  });

  it('redirects to the draft board when status is completed', () => {
    const season = createMockSeason({ status: 'completed' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'user-1',
      hasTeam: true,
    });
    expect(result).toEqual({ redirect: '/leagues/league-1/draft-board/season-1' });
  });

  it('does not redirect when status is pre_draft', () => {
    const season = createMockSeason({ status: 'pre_draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'user-1',
      hasTeam: true,
    });
    expect(result).toBeNull();
  });
});

// ---------------------------------------------------------------------------
// Authentication
// ---------------------------------------------------------------------------

describe('Set Pre-Draft Queue Access - Authentication', () => {
  it('returns 401 when no user is logged in', () => {
    const season = createMockSeason({ status: 'pre_draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: null,
      hasTeam: false,
    });
    expect(result).toMatchObject({ status: 401 });
  });

  it('uses a descriptive 401 message', () => {
    const season = createMockSeason({ status: 'pre_draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: null,
      hasTeam: false,
    });
    expect(result).toMatchObject({ message: 'You must be logged in to set pre-draft queue' });
  });
});

// ---------------------------------------------------------------------------
// Team membership
// ---------------------------------------------------------------------------

describe('Set Pre-Draft Queue Access - Team Membership', () => {
  it('returns 403 for a logged-in user with no team in the season', () => {
    const season = createMockSeason({ status: 'pre_draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'outsider',
      hasTeam: false,
    });
    expect(result).toMatchObject({ status: 403 });
  });

  it('uses a descriptive 403 message', () => {
    const season = createMockSeason({ status: 'pre_draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'outsider',
      hasTeam: false,
    });
    expect(result).toMatchObject({ message: 'You do not have a team in this season' });
  });

  it('grants access to a logged-in user who owns a team', () => {
    const season = createMockSeason({ status: 'pre_draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'owner-user',
      hasTeam: true,
    });
    expect(result).toBeNull();
  });
});

// ---------------------------------------------------------------------------
// Redirect targets use the correct leagueId and seasonId
// ---------------------------------------------------------------------------

describe('Set Pre-Draft Queue Access - Redirect URL Correctness', () => {
  it('uses the leagueId from params in the redirect URL', () => {
    const season = createMockSeason({ id: 'season-99', status: 'draft' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-42',
      season,
      userId: 'user-1',
      hasTeam: true,
    });
    expect(result).toEqual({ redirect: '/leagues/league-42/draft/season-99' });
  });

  it('uses the seasonId in the redirect URL', () => {
    const season = createMockSeason({ id: 'season-77', status: 'active' });
    const result = checkPreDraftRankingsAccess({
      leagueId: 'league-1',
      season,
      userId: 'user-1',
      hasTeam: true,
    });
    expect(result).toEqual({ redirect: '/leagues/league-1/draft-board/season-77' });
  });
});