algorithmus improvements

src/context/TournamentContext.tsx

@@ -1,6 +1,6 @@
 import React, { createContext, useContext, useState, ReactNode, useMemo } from 'react';
 import { Team, Round, TeamScore, Match, MatchResult } from '@/types/tournament';
-import { generateMatches } from '@/utils/tournamentUtils';
+import { generateMatches, createNextRoundMatches } from '@/utils/tournamentUtils';
 
 interface TournamentContextType {
   teams: Team[];
@@ -53,7 +53,17 @@ export const TournamentProvider = ({ children }: { children: ReactNode }) => {
   const startNewRound = () => {
     if (currentRound && !currentRound.completed) return;
 
-    const state = generateMatches(teams, fieldCount);
+    let state;
+
+    if (rounds.length === 0) {
+      // First round: initial random generation
+      state = generateMatches(teams, fieldCount);
+    } else {
+      // Subsequent rounds: rotation system
+      const lastRound = rounds[rounds.length - 1];
+      state = createNextRoundMatches(lastRound, fieldCount);
+    }
+
     const allMatches = [...state.bundesligaMatches, ...state.championsMatches];
 
     const newRound: Round = {
@@ -69,12 +79,26 @@ export const TournamentProvider = ({ children }: { children: ReactNode }) => {
   };
 
   const updateMatchResult = (matchId: string, scoreA: number, scoreB: number) => {
-    const diff = scoreB - scoreA;
+    const diff = Math.abs(scoreB - scoreA);
+    
+    let pointsA: number;
+    let pointsB: number;
+    
+    if (scoreA > scoreB) {
+      // Team A gewinnt
+      pointsA = diff + 2;
+      pointsB = -diff;
+    } else {
+      // Team B gewinnt
+      pointsA = -diff;
+      pointsB = diff + 2;
+    }
+    
     const result: MatchResult = {
       scoreA,
       scoreB,
-      pointsA: -diff,
-      pointsB: diff,
+      pointsA,
+      pointsB,
     };
 
     setRounds((prev) =>

src/utils/tournamentUtils.ts

@@ -1,4 +1,4 @@
-import { Team, Match, TournamentState, League } from '@/types/tournament';
+import { Team, Match, TournamentState, League, Round } from '@/types/tournament';
 
 export const generateMatches = (teams: Team[], fieldCount: number): TournamentState => {
   const bundesligaTeams = teams.filter((t) => t.league === 'bundesliga');
@@ -71,3 +71,139 @@ export const generateMatches = (teams: Team[], fieldCount: number): TournamentSt
     championsFields,
   };
 };
+
+/**
+ * Rotation system for subsequent rounds
+ * Implements 3 cases:
+ * - Case 1: Even teams (no waiting) - all rotate using Circle Rotation algorithm
+ * - Case 2: Odd teams (1 waiting) - waiting joins, last playing goes to waiting
+ * - Case 3: Multiple waiting (3+) - all waiting play, last N playing go to waiting
+ */
+export const createNextRoundMatches = (
+  previousRound: Round,
+  fieldCount: number
+): TournamentState => {
+  const createRotatedMatches = (
+    currentMatches: Match[],
+    waitingTeams: Team[],
+    availableFields: number,
+    league: League,
+    fieldOffset: number
+  ): { matches: Match[]; waiting: Team[] } => {
+    if (currentMatches.length === 0) {
+      return { matches: [], waiting: waitingTeams };
+    }
+
+    // Collect all teams from current matches and waiting
+    const playingTeams = currentMatches.flatMap((m) => [m.teamA, m.teamB]);
+    const allTeamsForLeague = [...playingTeams, ...waitingTeams];
+
+    if (allTeamsForLeague.length < 2) {
+      return { matches: [], waiting: allTeamsForLeague };
+    }
+
+    const numWaiting = waitingTeams.length;
+    let rotatedTeams: Team[] = [];
+
+    if (numWaiting === 0) {
+      // Case 1: No waiting teams - use Circle Rotation algorithm
+      rotatedTeams = rotateTeamsInCircle(allTeamsForLeague);
+    } else if (numWaiting === 1) {
+      // Case 2: 1 waiting team - waiting joins, last playing goes to waiting
+      rotatedTeams = [waitingTeams[0], ...playingTeams.slice(0, -1), playingTeams[playingTeams.length - 1]];
+    } else {
+      // Case 3: Multiple waiting - all waiting play, last N playing go to waiting
+      rotatedTeams = [
+        ...waitingTeams,
+        ...playingTeams.slice(0, playingTeams.length - numWaiting),
+        ...playingTeams.slice(-numWaiting),
+      ];
+    }
+
+    // Now create matches based on available fields
+    const maxTeamsPlaying = availableFields * 2;
+    const teamsToPlay = rotatedTeams.slice(0, maxTeamsPlaying);
+    const newWaiting = rotatedTeams.slice(maxTeamsPlaying);
+
+    // Create matches from playing teams
+    const matches: Match[] = [];
+    let teamIndex = 0;
+    let fieldNumber = fieldOffset + 1;
+
+    while (teamIndex < teamsToPlay.length - 1 && matches.length < availableFields) {
+      matches.push({
+        id: crypto.randomUUID(),
+        teamA: teamsToPlay[teamIndex],
+        teamB: teamsToPlay[teamIndex + 1],
+        fieldNumber,
+        league,
+      });
+      teamIndex += 2;
+      fieldNumber++;
+    }
+
+    return { matches, waiting: newWaiting };
+  };
+
+  // Determine field allocation
+  const bundesligaMatches = previousRound.matches.filter((m) => m.league === 'bundesliga');
+  const championsMatches = previousRound.matches.filter((m) => m.league === 'champions');
+
+  const bundesligaHasTeams = bundesligaMatches.length > 0 || previousRound.bundesligaWaiting.length > 0;
+  const championsHasTeams = championsMatches.length > 0 || previousRound.championsWaiting.length > 0;
+
+  let bundesligaFields = 0;
+  let championsFields = 0;
+
+  if (bundesligaHasTeams && championsHasTeams) {
+    bundesligaFields = Math.floor(fieldCount / 2);
+    championsFields = fieldCount - bundesligaFields;
+  } else if (bundesligaHasTeams) {
+    bundesligaFields = fieldCount;
+  } else if (championsHasTeams) {
+    championsFields = fieldCount;
+  }
+
+  // Apply rotation for each league
+  const bundesliga = createRotatedMatches(
+    bundesligaMatches,
+    previousRound.bundesligaWaiting,
+    bundesligaFields,
+    'bundesliga',
+    0
+  );
+
+  const champions = createRotatedMatches(
+    championsMatches,
+    previousRound.championsWaiting,
+    championsFields,
+    'champions',
+    bundesligaFields
+  );
+
+  return {
+    bundesligaMatches: bundesliga.matches,
+    championsMatches: champions.matches,
+    bundesligaWaiting: bundesliga.waiting,
+    championsWaiting: champions.waiting,
+    bundesligaFields,
+    championsFields,
+  };
+};
+
+/**
+ * Circle Rotation Algorithm (Roundrobin)
+ * Keeps first team fixed, rotates all others by 1 position
+ * Example: [A, B, C, D] → [A, D, B, C] → [A, C, D, B] → [A, B, C, D]
+ */
+function rotateTeamsInCircle(teams: Team[]): Team[] {
+  if (teams.length <= 2) return teams;
+
+  const fixed = teams[0];
+  const rotating = teams.slice(1);
+
+  // Rotate: move last to first
+  const rotated = [rotating[rotating.length - 1], ...rotating.slice(0, -1)];
+
+  return [fixed, ...rotated];
+}