import express from 'express';
import path from 'path';
import { fileURLToPath } from 'url';
import sequelize from './database.js';
import cors from 'cors';
import {
  User, Log, Club, UserClub, Member, DiaryDate, Participant, Activity, MemberNote,
  DiaryNote, DiaryTag, MemberDiaryTag, DiaryDateTag, DiaryMemberNote, DiaryMemberTag,
  PredefinedActivity, PredefinedActivityImage, DiaryDateActivity, DiaryMemberActivity, Match, League, Team, ClubTeam, TeamDocument, Group,
  GroupActivity, Tournament, TournamentGroup, TournamentMatch, TournamentResult,
  TournamentMember, Accident, UserToken, OfficialTournament, OfficialCompetition, OfficialCompetitionMember, MyTischtennis, MyTischtennisUpdateHistory, MyTischtennisFetchLog, ApiLog, MemberTransferConfig, MemberContact
} from './models/index.js';
import authRoutes from './routes/authRoutes.js';
import clubRoutes from './routes/clubRoutes.js';
import diaryRoutes from './routes/diaryRoutes.js';
import memberRoutes from './routes/memberRoutes.js';
import participantRoutes from './routes/participantRoutes.js';
import activityRoutes from './routes/activityRoutes.js';
import memberNoteRoutes from './routes/memberNoteRoutes.js';
import diaryTagRoutes from './routes/diaryTagRoutes.js';
import diaryNoteRoutes from './routes/diaryNoteRoutes.js';
import diaryMemberRoutes from './routes/diaryMemberRoutes.js';
import predefinedActivityRoutes from './routes/predefinedActivityRoutes.js';
import diaryDateActivityRoutes from './routes/diaryDateActivityRoutes.js';
import diaryMemberActivityRoutes from './routes/diaryMemberActivityRoutes.js';
import matchRoutes from './routes/matchRoutes.js';
import Season from './models/Season.js';
import Location from './models/Location.js';
import groupRoutes from './routes/groupRoutes.js';
import diaryDateTagRoutes from './routes/diaryDateTagRoutes.js';
import sessionRoutes from './routes/sessionRoutes.js';
import tournamentRoutes from './routes/tournamentRoutes.js';
import accidentRoutes from './routes/accidentRoutes.js';
import trainingStatsRoutes from './routes/trainingStatsRoutes.js';
import officialTournamentRoutes from './routes/officialTournamentRoutes.js';
import myTischtennisRoutes from './routes/myTischtennisRoutes.js';
import teamRoutes from './routes/teamRoutes.js';
import clubTeamRoutes from './routes/clubTeamRoutes.js';
import teamDocumentRoutes from './routes/teamDocumentRoutes.js';
import seasonRoutes from './routes/seasonRoutes.js';
import memberActivityRoutes from './routes/memberActivityRoutes.js';
import permissionRoutes from './routes/permissionRoutes.js';
import apiLogRoutes from './routes/apiLogRoutes.js';
import memberTransferConfigRoutes from './routes/memberTransferConfigRoutes.js';
import schedulerService from './services/schedulerService.js';
import { requestLoggingMiddleware } from './middleware/requestLoggingMiddleware.js';
 
const app = express();
const port = process.env.PORT || 3005;

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

app.use(cors({
  origin: true,
  credentials: true,
  methods: ['GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'OPTIONS'],
  allowedHeaders: ['Content-Type', 'Authorization', 'authcode', 'userid']
}));
app.use(express.json());

// Request Logging Middleware - loggt alle API-Requests
// Wichtig: userId wird später in authMiddleware gesetzt, aber Middleware funktioniert auch ohne
app.use(requestLoggingMiddleware);

// Globale Fehlerbehandlung, damit der Server bei unerwarteten Fehlern nicht hart abstürzt
process.on('uncaughtException', (err) => {
  console.error('[uncaughtException]', err);
});
process.on('unhandledRejection', (reason, promise) => {
  console.error('[unhandledRejection]', reason);
});

app.use('/api/auth', authRoutes);
app.use('/api/clubs', clubRoutes);
app.use('/api/clubmembers', memberRoutes);
app.use('/api/diary', diaryRoutes);
app.use('/api/participants', participantRoutes);
app.use('/api/activities', activityRoutes);
app.use('/api/membernotes', memberNoteRoutes);
app.use('/api/diarynotes', diaryNoteRoutes);
app.use('/api/tags', diaryTagRoutes);
app.use('/api/diarymember', diaryMemberRoutes);
app.use('/api/predefined-activities', predefinedActivityRoutes);
app.use('/api/diary-date-activities', diaryDateActivityRoutes);
app.use('/api/diary-member-activities', diaryMemberActivityRoutes);
app.use('/api/matches', matchRoutes);
app.use('/api/group', groupRoutes);
app.use('/api/diarydatetags', diaryDateTagRoutes);
app.use('/api/session', sessionRoutes);
app.use('/api/tournament', tournamentRoutes);
app.use('/api/accident', accidentRoutes);
app.use('/api/training-stats', trainingStatsRoutes);
app.use('/api/official-tournaments', officialTournamentRoutes);
app.use('/api/mytischtennis', myTischtennisRoutes);
app.use('/api/teams', teamRoutes);
app.use('/api/club-teams', clubTeamRoutes);
app.use('/api/team-documents', teamDocumentRoutes);
app.use('/api/seasons', seasonRoutes);
app.use('/api/member-activities', memberActivityRoutes);
app.use('/api/permissions', permissionRoutes);
app.use('/api/logs', apiLogRoutes);
app.use('/api/member-transfer-config', memberTransferConfigRoutes);

app.use(express.static(path.join(__dirname, '../frontend/dist')));

// Catch-All Handler für Frontend-Routen (muss nach den API-Routen stehen)
app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, '../frontend/dist/index.html'));
});

(async () => {
  try {
    await sequelize.authenticate();

    // Einmalige Migration: deutsche Spaltennamen -> englische
    const renameColumnIfExists = async (table, from, to, typeSql) => {
      try {
        const [rows] = await sequelize.query(`SHOW COLUMNS FROM \`${table}\` LIKE :col`, { replacements: { col: from } });
        if (Array.isArray(rows) && rows.length > 0) {
          await sequelize.query(`ALTER TABLE \`${table}\` CHANGE \`${from}\` \`${to}\` ${typeSql}`);
        }
      } catch (e) {
        console.error(`[migration] Failed to rename ${table}.${from} -> ${to}:`, e.message);
      }
    };

    // official_competitions
    await renameColumnIfExists('official_competitions', 'altersklasse_wettbewerb', 'age_class_competition', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'leistungsklasse', 'performance_class', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'startzeit', 'start_time', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'meldeschluss_datum', 'registration_deadline_date', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'meldeschluss_online', 'registration_deadline_online', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'stichtag', 'cutoff_date', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'offen_fuer', 'open_to', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'vorrunde', 'preliminary_round', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'endrunde', 'final_round', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'max_teilnehmer', 'max_participants', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_competitions', 'startgeld', 'entry_fee', 'VARCHAR(255) NULL');

    // official_tournaments
    await renameColumnIfExists('official_tournaments', 'termin', 'event_date', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_tournaments', 'veranstalter', 'organizer', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_tournaments', 'ausrichter', 'host', 'VARCHAR(255) NULL');
    await renameColumnIfExists('official_tournaments', 'austragungsorte', 'venues', 'TEXT NULL');
    await renameColumnIfExists('official_tournaments', 'konkurrenztypen', 'competition_types', 'TEXT NULL');
    await renameColumnIfExists('official_tournaments', 'meldeschluesse', 'registration_deadlines', 'TEXT NULL');

    const isDev = process.env.STAGE === 'dev';
    const safeSync = async (model) => {
      try {
        if (isDev) {
          await model.sync({ alter: true });
        } else {
          await model.sync();
        }
      } catch (e) {
        try {
          console.error(`[sync] ${model?.name || 'model'} alter failed:`, e?.message || e);
          await model.sync();
        } catch (e2) {
          console.error(`[sync] fallback failed for ${model?.name || 'model'}:`, e2?.message || e2);
        }
      }
    };

    await safeSync(User);
    await safeSync(Club);
    await safeSync(UserClub);
    await safeSync(Log);
    await safeSync(Member);
    await safeSync(DiaryDate);
    await safeSync(Participant);
    await safeSync(Activity);
    await safeSync(MemberNote);
    await safeSync(DiaryNote);
    await safeSync(DiaryTag);
    await safeSync(MemberDiaryTag);
    await safeSync(DiaryDateTag);
    await safeSync(DiaryMemberTag);
    await safeSync(DiaryMemberNote);
    await safeSync(PredefinedActivity);
    await safeSync(PredefinedActivityImage);
    await safeSync(DiaryDateActivity);
    await safeSync(DiaryMemberActivity);
    await safeSync(OfficialTournament);
    await safeSync(OfficialCompetition);
    await safeSync(OfficialCompetitionMember);
    await safeSync(Season);
    await safeSync(League);
    await safeSync(Team);
    await safeSync(Location);
    await safeSync(Match);
    await safeSync(Group);
    await safeSync(GroupActivity);
    await safeSync(Tournament);
    await safeSync(TournamentGroup);
    await safeSync(TournamentMember);
    await safeSync(TournamentMatch);
    await safeSync(TournamentResult);
    await safeSync(Accident);
    await safeSync(UserToken);
    await safeSync(MyTischtennis);
    await safeSync(MyTischtennisUpdateHistory);
    await safeSync(MyTischtennisFetchLog);
    await safeSync(ApiLog);
    await safeSync(MemberTransferConfig);
    await safeSync(MemberContact);

    // Start scheduler service
    schedulerService.start();

    app.listen(port, () => {
      console.log(`Server is running on http://localhost:${port}`);
      console.log('Scheduler service started:');
      console.log('  - Rating updates: 6:00 AM daily');
      console.log('  - Match results fetch: 6:30 AM daily');
    });
  } catch (err) {
    console.error('Unable to synchronize the database:', err);
  }
})();