import Match3Campaign from '../models/match3/campaign.js';
import Match3Level from '../models/match3/level.js';
import Match3Objective from '../models/match3/objective.js';
import Match3UserProgress from '../models/match3/userProgress.js';
import Match3UserLevelProgress from '../models/match3/userLevelProgress.js';

class Match3Service {
  /**
   * Lädt alle aktiven Kampagnen
   */
  async getActiveCampaigns() {
    try {
      const campaigns = await Match3Campaign.findAll({
        where: { isActive: true },
        include: [
          {
            model: Match3Level,
            as: 'levels',
            where: { isActive: true },
            required: false,
            include: [
              {
                model: Match3Objective,
                as: 'objectives',
                required: false,
                order: [['order', 'ASC']]
              }
            ],
            order: [['order', 'ASC']]
          }
        ],
        order: [['order', 'ASC']]
      });

      return campaigns;
    } catch (error) {
      console.error('Error loading active campaigns:', error);
      throw error;
    }
  }

  /**
   * Lädt eine spezifische Kampagne mit allen Leveln
   */
  async getCampaign(campaignId) {
    try {
      const campaign = await Match3Campaign.findByPk(campaignId, {
        include: [
          {
            model: Match3Level,
            as: 'levels',
            where: { isActive: true },
            required: false,
            include: [
              {
                model: Match3Objective,
                as: 'objectives',
                required: false,
                order: [['order', 'ASC']]
              }
            ],
            order: [['order', 'ASC']]
          }
        ]
      });

      return campaign;
    } catch (error) {
      console.error('Error loading campaign:', error);
      throw error;
    }
  }

  /**
   * Lädt den Benutzerfortschritt für eine Kampagne
   */
  async getUserProgress(userId, campaignId) {
    try {
      let userProgress = await Match3UserProgress.findOne({
        where: { userId, campaignId },
        include: [
          {
            model: Match3UserLevelProgress,
            as: 'levelProgress',
            include: [
              {
                model: Match3Level,
                as: 'level'
              }
            ]
          }
        ]
      });

      if (!userProgress) {
        // Erstelle neuen Fortschritt wenn noch nicht vorhanden
        userProgress = await Match3UserProgress.create({
          userId,
          campaignId,
          totalScore: 0,
          totalStars: 0,
          levelsCompleted: 0,
          currentLevel: 1,
          isCompleted: false
        });
      } else {
        // Validiere und korrigiere bestehende currentLevel-Werte
        if (userProgress.currentLevel < 1 || userProgress.currentLevel > 1000) {
          console.warn(`Invalid currentLevel detected for user ${userId}: ${userProgress.currentLevel}, correcting to ${userProgress.levelsCompleted + 1}`);
          
          // Korrigiere den ungültigen Wert
          await userProgress.update({
            currentLevel: userProgress.levelsCompleted + 1
          });
          
          // Lade den aktualisierten Datensatz
          userProgress = await Match3UserProgress.findByPk(userProgress.id, {
            include: [
              {
                model: Match3UserLevelProgress,
                as: 'levelProgress',
                include: [
                  {
                    model: Match3Level,
                    as: 'level'
                  }
                ]
              }
            ]
          });
        }
      }

      return userProgress;
    } catch (error) {
      console.error('Error loading user progress:', error);
      throw error;
    }
  }

  /**
   * Aktualisiert den Level-Fortschritt eines Benutzers
   */
  async updateLevelProgress(userId, campaignId, levelId, levelData) {
    try {
      // Lade oder erstelle Benutzerfortschritt
      let userProgress = await Match3UserProgress.findOne({
        where: { userId, campaignId }
      });

      if (!userProgress) {
        userProgress = await Match3UserProgress.create({
          userId,
          campaignId,
          totalScore: 0,
          totalStars: 0,
          levelsCompleted: 0,
          currentLevel: 1,
          isCompleted: false
        });
      }

      // Lade oder erstelle Level-Fortschritt
      let levelProgress = await Match3UserLevelProgress.findOne({
        where: { userProgressId: userProgress.id, levelId }
      });

      if (!levelProgress) {
        levelProgress = await Match3UserLevelProgress.create({
          userProgressId: userProgress.id,
          levelId,
          score: 0,
          moves: 0,
          time: 0,
          stars: 0,
          isCompleted: false,
          attempts: 0
        });
      }

      // Aktualisiere Level-Fortschritt
      const updateData = {
        score: Math.max(levelProgress.bestScore, levelData.score),
        moves: levelData.moves,
        time: levelData.time || 0,
        stars: Math.max(levelProgress.stars, levelData.stars),
        isCompleted: levelData.isCompleted || false,
        attempts: levelProgress.attempts + 1
      };

      if (levelData.isCompleted) {
        updateData.completedAt = new Date();
      }

      await levelProgress.update(updateData);

      // Aktualisiere Bestwerte
      if (levelData.score > levelProgress.bestScore) {
        await levelProgress.update({ bestScore: levelData.score });
      }
      if (levelData.moves < levelProgress.bestMoves || levelProgress.bestMoves === 0) {
        await levelProgress.update({ bestMoves: levelData.moves });
      }
      if (levelData.time < levelProgress.bestTime || levelProgress.bestTime === 0) {
        await levelProgress.update({ bestTime: levelData.time });
      }

      // Aktualisiere Kampagnen-Fortschritt
      if (levelData.isCompleted) {
        const totalScore = await Match3UserLevelProgress.sum('score', {
          where: { userProgressId: userProgress.id, isCompleted: true }
        });

        const totalStars = await Match3UserLevelProgress.sum('stars', {
          where: { userProgressId: userProgress.id, isCompleted: true }
        });

        const levelsCompleted = await Match3UserLevelProgress.count({
          where: { userProgressId: userProgress.id, isCompleted: true }
        });

        // Korrigiere currentLevel: Es sollte immer levelsCompleted + 1 sein
        const correctCurrentLevel = levelsCompleted + 1;
        
        await userProgress.update({
          totalScore,
          totalStars,
          levelsCompleted,
          currentLevel: correctCurrentLevel, // Verwende den korrigierten Wert
          lastPlayed: new Date()
        });

        // Prüfe ob Kampagne abgeschlossen ist
        const totalLevels = await Match3Level.count({
          where: { campaignId, isActive: true }
        });

        if (levelsCompleted >= totalLevels) {
          await userProgress.update({ isCompleted: true });
        }
      }

      return { userProgress, levelProgress };
    } catch (error) {
      console.error('Error updating level progress:', error);
      throw error;
    }
  }

  /**
   * Lädt die Bestenliste für eine Kampagne
   */
  async getLeaderboard(campaignId, limit = 10) {
    try {
      const leaderboard = await Match3UserProgress.findAll({
        where: { campaignId },
        include: [
          {
            model: Match3UserLevelProgress,
            as: 'levelProgress',
            where: { isCompleted: true },
            required: false
          }
        ],
        order: [
          ['totalScore', 'DESC'],
          ['totalStars', 'DESC'],
          ['levelsCompleted', 'DESC']
        ],
        limit
      });

      return leaderboard;
    } catch (error) {
      console.error('Error loading leaderboard:', error);
      throw error;
    }
  }

  /**
   * Lädt Statistiken für einen Benutzer
   */
  async getUserStats(userId) {
    try {
      const stats = await Match3UserProgress.findAll({
        where: { userId },
        include: [
          {
            model: Match3Campaign,
            as: 'campaign'
          },
          {
            model: Match3UserLevelProgress,
            as: 'levelProgress',
            include: [
              {
                model: Match3Level,
                as: 'level'
              }
            ]
          }
        ]
      });

      return stats;
    } catch (error) {
      console.error('Error loading user stats:', error);
      throw error;
    }
  }
}

export default new Match3Service();