// backend/retroClient.js

'use strict';

const {
  buildAuthorization,
  getUserProfile,
  getUserRecentAchievements,
  getGame
} = require('@retroachievements/api');

class RetroClient {
  constructor() {
    const RA_USER = process.env.RA_USER;
    const RA_KEY = process.env.RA_KEY;

    if (!RA_USER || !RA_KEY) {
      throw new Error('RetroAchievements username and API key must be set in .env file');
    }

    this.authorization = buildAuthorization({
      username: RA_USER,
      webApiKey: RA_KEY
    });

    console.log('🎮 RetroAchievements API client initialized');
  }

  // Helper method to build correct image URLs
  buildImageUrl(imagePath, baseUrl) {
    if (!imagePath) return null;

    const toStr = (v) => (typeof v === 'string' ? v : String(v));

    // If full URL provided, return as-is
    if (/^https?:\/\//i.test(imagePath)) {
      return imagePath;
    }

    const pathStr = toStr(imagePath);

    // Handle full server-relative paths that start with /
    if (pathStr.startsWith('/')) {
      // Ensure .png for badges
      if (pathStr.startsWith('/Badge/')) {
        const name = pathStr.split('/').pop().replace(/\.(png|jpe?g|gif|webp)$/i, '');
        return `https://media.retroachievements.org/Badge/${name}.png`;
      }
      return `https://media.retroachievements.org${pathStr}`;
    }

    // Normalize base URL (strip trailing slashes)
    const normalizedBase = toStr(baseUrl || '').replace(/\/+$/, '');

    // Special handling for badges - always ensure .png extension
    const isBadgeContext = /\/Badge(\/|$)/i.test(normalizedBase);
    if (isBadgeContext) {
      const cleanImagePath = pathStr.replace(/\.(png|jpe?g|gif|webp)$/i, '');
      return `${normalizedBase}/${cleanImagePath}.png`;
    }

    // For other images (UserPic, Images), build normally
    return `${normalizedBase}/${pathStr}`;
  }

  async getUserProfile(username) {
    try {
      console.log(`📊 Fetching profile for user: ${username}`);
      const profile = await getUserProfile(this.authorization, { username });
      return profile;
    } catch (error) {
      console.error(`❌ Error fetching user profile for ${username}:`, error.message);
      throw new Error(`Failed to fetch user profile: ${error.message}`);
    }
  }

  async getUserRecentAchievements(username, count = 10) {
    try {
      console.log(`🏆 Fetching recent achievements for user: ${username}`);
      const achievements = await getUserRecentAchievements(this.authorization, {
        username,
        count
      });
      return achievements;
    } catch (error) {
      console.error(`❌ Error fetching recent achievements for ${username}:`, error.message);
      throw new Error(`Failed to fetch recent achievements: ${error.message}`);
    }
  }

  async getGameInfo(gameId) {
    try {
      console.log(`🎮 Fetching game info for ID: ${gameId}`);
      const game = await getGame(this.authorization, { gameId });
      return game;
    } catch (error) {
      console.error(`❌ Error fetching game info for ID ${gameId}:`, error.message);
      throw new Error(`Failed to fetch game info: ${error.message}`);
    }
  }

  async getUserData(username) {
    try {
      const profile = await this.getUserProfile(username);

      let lastGame = null;
      let lastAchievement = null;

      if (profile.lastGameId) {
        try {
          lastGame = await this.getGameInfo(profile.lastGameId);
        } catch (gameError) {
          console.warn(`⚠️ Could not fetch last game info: ${gameError.message}`);
        }
      }

      try {
        const recentAchievements = await this.getUserRecentAchievements(username, 1);
        if (recentAchievements && recentAchievements.length > 0) {
          lastAchievement = recentAchievements;
        }
      } catch (achievementError) {
        console.warn(`⚠️ Could not fetch recent achievements: ${achievementError.message}`);
      }

      return {
        user: {
          username: profile.user,
          displayName: profile.user,
          avatar: this.buildImageUrl(
            profile.userPic,
            'https://media.retroachievements.org/UserPic'
          ),
          motto: profile.motto || '',
          totalPoints: profile.totalPoints || 0,
          totalTruePoints: profile.totalTruePoints || 0,
          memberSince: profile.memberSince || null,
          rank: profile.rank || null
        },
        lastGame: lastGame
          ? {
              id: lastGame.gameId,
              title: lastGame.title,
              icon: this.buildImageUrl(
                lastGame.gameIcon,
                'https://media.retroachievements.org/Images'
              ),
              consoleName: lastGame.consoleName
            }
          : null,
        lastAchievement: lastAchievement
          ? {
              id: lastAchievement.achievementId,
              title: lastAchievement.title,
              description: lastAchievement.description,
              points: lastAchievement.points,
              trueRatio: lastAchievement.trueRatio,
              gameTitle: lastAchievement.gameTitle,
              gameIcon: this.buildImageUrl(
                lastAchievement.gameIcon,
                'https://media.retroachievements.org/Images'
              ),
              badgeName: this.buildImageUrl(
                lastAchievement.badgeName,
                'https://media.retroachievements.org/Badge'
              ),
              dateEarned: lastAchievement.dateEarned
            }
          : null
      };
    } catch (error) {
      console.error(`❌ Error in getUserData for ${username}:`, error.message);
      throw error;
    }
  }

  async getOverlayData(username, count = 5) {
    try {
      const recentAchievements = await this.getUserRecentAchievements(username, count);

      const formattedAchievements = recentAchievements.map((achievement) => {
        // Debug log to see what we're getting from the API
        console.log(
          `🔍 Processing badge for achievement "${achievement.title}": badgeName="${achievement.badgeName}"`
        );

        return {
          id: achievement.achievementId,
          title: achievement.title,
          description: achievement.description,
          points: achievement.points,
          trueRatio: achievement.trueRatio || achievement.points,
          gameTitle: achievement.gameTitle,
          gameIcon: this.buildImageUrl(
            achievement.gameIcon,
            'https://media.retroachievements.org/Images'
          ),
          badgeName: this.buildImageUrl(
            achievement.badgeName,
            'https://media.retroachievements.org/Badge'
          ),
          dateEarned: achievement.dateEarned
        };
      });

      return {
        username,
        recentAchievements: formattedAchievements,
        lastUpdated: new Date().toISOString()
      };
    } catch (error) {
      console.error(`❌ Error in getOverlayData for ${username}:`, error.message);
      throw error;
    }
  }
}

module.exports = new RetroClient();