const couchdbService = require("../services/couchdbService");

class UserBadge {
  static async create(userBadgeData) {
    const doc = {
      type: "user_badge",
      ...userBadgeData,
      earnedAt: userBadgeData.earnedAt || new Date().toISOString(),
      progress: userBadgeData.progress || 0,
      createdAt: new Date().toISOString(),
      updatedAt: new Date().toISOString(),
    };

    return await couchdbService.createDocument(doc);
  }

  static async findById(id) {
    const doc = await couchdbService.getDocument(id);
    if (doc && doc.type === "user_badge") {
      return doc;
    }
    return null;
  }

  static async find(filter = {}) {
    const selector = {
      type: "user_badge",
      ...filter,
    };

    return await couchdbService.findDocuments(selector);
  }

  static async findByUser(userId) {
    const selector = {
      type: "user_badge",
      userId: userId,
    };

    const userBadges = await couchdbService.findDocuments(selector);
    
    // Populate badge data for each user badge
    const populatedBadges = await Promise.all(
      userBadges.map(async (userBadge) => {
        if (userBadge.badgeId) {
          const badge = await couchdbService.getDocument(userBadge.badgeId);
          return {
            ...userBadge,
            badge: badge,
          };
        }
        return userBadge;
      })
    );

    return populatedBadges;
  }

  static async findByBadge(badgeId) {
    const selector = {
      type: "user_badge",
      badgeId: badgeId,
    };

    return await couchdbService.findDocuments(selector);
  }

  static async update(id, updateData) {
    const doc = await couchdbService.getDocument(id);
    if (!doc || doc.type !== "user_badge") {
      throw new Error("UserBadge not found");
    }

    const updatedDoc = {
      ...doc,
      ...updateData,
      updatedAt: new Date().toISOString(),
    };

    return await couchdbService.updateDocument(id, updatedDoc);
  }

  static async delete(id) {
    const doc = await couchdbService.getDocument(id);
    if (!doc || doc.type !== "user_badge") {
      throw new Error("UserBadge not found");
    }

    return await couchdbService.deleteDocument(id, doc._rev);
  }

  static async findByUserAndBadge(userId, badgeId) {
    const selector = {
      type: "user_badge",
      userId: userId,
      badgeId: badgeId,
    };

    const results = await couchdbService.findDocuments(selector);
    return results[0] || null;
  }

  static async updateProgress(userId, badgeId, progress) {
    const userBadge = await this.findByUserAndBadge(userId, badgeId);
    
    if (userBadge) {
      return await this.update(userBadge._id, { progress });
    } else {
      return await this.create({
        userId,
        badgeId,
        progress,
      });
    }
  }
}

module.exports = UserBadge;