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, Group,
  GroupActivity, Tournament, TournamentGroup, TournamentMatch, TournamentResult,
  TournamentMember, Accident, UserToken, OfficialTournament, OfficialCompetition
} 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';

const app = express();
const port = process.env.PORT || 3000;

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

app.use(cors());
app.use(express.json());

// 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(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');

    await User.sync();
    await Club.sync({ alter: true });
    await UserClub.sync({ alter: true });
    await Log.sync({ alter: true });
    await Member.sync({ alter: true });
    await DiaryDate.sync({ alter: true });
    await Participant.sync({ alter: true });
    await Activity.sync({ alter: true });
    await MemberNote.sync({ alter: true });
    await DiaryNote.sync({ alter: true });
    await DiaryTag.sync({ alter: true });
    await MemberDiaryTag.sync({ alter: true });
    await DiaryDateTag.sync({ alter: true });
    await DiaryMemberTag.sync({ alter: true });
    await DiaryMemberNote.sync({ alter: true });
    await PredefinedActivity.sync({ alter: true });
    await PredefinedActivityImage.sync({ alter: true });
    await DiaryDateActivity.sync({ alter: true });
    await DiaryMemberActivity.sync({ alter: true });
    await OfficialTournament.sync({ alter: true });
    await OfficialCompetition.sync({ alter: true });
    await Season.sync({ alter: true });
    await League.sync({ alter: true });
    await Team.sync({ alter: true });
    await Location.sync({ alter: true });
    await Match.sync({ alter: true });
    await Group.sync({ alter: true });
    await GroupActivity.sync({ alter: true });
    await Tournament.sync({ alter: true });
    await TournamentGroup.sync({ alter: true });
    await TournamentMember.sync({ alter: true });
    await TournamentMatch.sync({ alter: true });
    await TournamentResult.sync({ alter: true });
    await Accident.sync({ alter: true });
    await UserToken.sync({ alter: true });

    app.listen(port, () => {
      console.log(`Server is running on http://localhost:${port}`);
    });
  } catch (err) {
    console.error('Unable to synchronize the database:', err);
  }
})();