const ZohoContactsBulk = require('../models/zohoContactsBulk');
const ZohoLeadsBulk = require('../models/zohoLeadsBulk');
const ZohoAccountsBulk = require('../models/zohoAccountsBulk');
const ZohoTasksBulk = require('../models/zohoTasksBulk');
const ZohoVendorsBulk = require('../models/zohoVendorsBulk');
const ZohoInvoicesBulk = require('../models/zohoInvoicesBulk');
const ZohoSalesOrdersBulk = require('../models/zohoSalesOrdersBulk');
const ZohoPurchaseOrdersBulk = require('../models/zohoPurchaseOrdersBulk');
const ZohoDealsBulk = require('../models/zohoDealsBulk');
const ZohoBulkReadJobs = require('../models/zohoBulkReadJobs');

class ZohoBulkReadRepository {
  constructor() {
    this.models = {
      'contacts': ZohoContactsBulk,
      'leads': ZohoLeadsBulk,
      'accounts': ZohoAccountsBulk,
      'tasks': ZohoTasksBulk,
      'vendors': ZohoVendorsBulk,
      'invoices': ZohoInvoicesBulk,
      'sales_orders': ZohoSalesOrdersBulk,
      'purchase_orders': ZohoPurchaseOrdersBulk,
      'deals': ZohoDealsBulk
    };
  }

  /**
   * Get the appropriate model for a module
   * @param {string} module - Module name
   * @returns {Object} Sequelize model
   */
  getModel(module) {
    const model = this.models[module.toLowerCase()];
    if (!model) {
      throw new Error(`No model found for module: ${module}`);
    }
    return model;
  }

  /**
   * Bulk insert data for a specific module
   * @param {string} module - Module name
   * @param {Array} data - Array of records to insert
   * @returns {Promise<Array>} Inserted records
   */
  async bulkInsert(module, data) {
    try {
      const model = this.getModel(module);
      console.log(`💾 Bulk inserting ${data.length} records for ${module}`);
      
      const result = await model.bulkCreate(data, {
        ignoreDuplicates: true,
        validate: true
      });
      
      console.log(`✅ Successfully inserted ${result.length} records for ${module}`);
      return result;
    } catch (error) {
      console.error(`❌ Error bulk inserting ${module}:`, error.message);
      throw error;
    }
  }

  /**
   * Clear existing data for a user and module
   * @param {string} userId - User UUID
   * @param {string} module - Module name
   * @param {string} jobId - Bulk job ID
   * @returns {Promise<number>} Number of deleted records
   */
  async clearUserData(userId, module, jobId) {
    try {
      const model = this.getModel(module);
      console.log(`🗑️ Clearing existing data for user ${userId}, module ${module}, job ${jobId}`);
      
      const result = await model.destroy({
        where: {
          user_uuid: userId,
          provider: 'zoho',
          bulk_job_id: jobId
        }
      });
      
      console.log(`✅ Cleared ${result} existing records for ${module}`);
      return result;
    } catch (error) {
      console.error(`❌ Error clearing data for ${module}:`, error.message);
      throw error;
    }
  }

  /**
   * Get data for a user and module
   * @param {string} userId - User UUID
   * @param {string} module - Module name
   * @param {Object} options - Query options
   * @returns {Promise<Array>} Records
   */
  async getUserData(userId, module, options = {}) {
    try {
      const model = this.getModel(module);
      const { limit = 100, offset = 0, orderBy = 'created_time', orderDirection = 'DESC' } = options;
      
      const records = await model.findAll({
        where: {
          user_uuid: userId,
          provider: 'zoho'
        },
        limit: parseInt(limit),
        offset: parseInt(offset),
        order: [[orderBy, orderDirection]]
      });
      
      return records;
    } catch (error) {
      console.error(`❌ Error getting user data for ${module}:`, error.message);
      throw error;
    }
  }

  /**
   * Get count of records for a user and module
   * @param {string} userId - User UUID
   * @param {string} module - Module name
   * @returns {Promise<number>} Record count
   */
  async getUserDataCount(userId, module) {
    try {
      const model = this.getModel(module);
      
      const count = await model.count({
        where: {
          user_uuid: userId,
          provider: 'zoho'
        }
      });
      
      return count;
    } catch (error) {
      console.error(`❌ Error getting count for ${module}:`, error.message);
      throw error;
    }
  }

  // Bulk Read Jobs methods
  /**
   * Create a new bulk read job record
   * @param {Object} jobData - Job data
   * @returns {Promise<Object>} Created job
   */
  async createBulkReadJob(jobData) {
    try {
      console.log('📝 Creating bulk read job:', jobData.id);
      
      const job = await ZohoBulkReadJobs.create({
        id: jobData.id,
        user_uuid: jobData.user_uuid,
        provider: 'zoho',
        module: jobData.module,
        operation: jobData.operation,
        state: jobData.state,
        file_type: jobData.file_type,
        download_url: jobData.download_url,
        records_count: jobData.records_count || 0,
        status: 'pending'
      });
      
      console.log('✅ Bulk read job created successfully');
      return job;
    } catch (error) {
      console.error('❌ Error creating bulk read job:', error.message);
      throw error;
    }
  }

  /**
   * Update bulk read job status
   * @param {string} jobId - Job ID
   * @param {Object} updateData - Update data
   * @returns {Promise<Object>} Updated job
   */
  async updateBulkReadJob(jobId, updateData) {
    try {
      console.log(`🔄 Updating bulk read job ${jobId}:`, updateData);
      
      const [updatedRows] = await ZohoBulkReadJobs.update(updateData, {
        where: { id: jobId }
      });
      
      if (updatedRows === 0) {
        throw new Error(`Job ${jobId} not found`);
      }
      
      const updatedJob = await ZohoBulkReadJobs.findByPk(jobId);
      console.log('✅ Bulk read job updated successfully');
      return updatedJob;
    } catch (error) {
      console.error('❌ Error updating bulk read job:', error.message);
      throw error;
    }
  }

  /**
   * Get bulk read job by ID
   * @param {string} jobId - Job ID
   * @returns {Promise<Object>} Job record
   */
  async getBulkReadJob(jobId) {
    try {
      const job = await ZohoBulkReadJobs.findByPk(jobId);
      return job;
    } catch (error) {
      console.error('❌ Error getting bulk read job:', error.message);
      throw error;
    }
  }

  /**
   * Get bulk read jobs for a user
   * @param {string} userId - User UUID
   * @param {Object} options - Query options
   * @returns {Promise<Array>} Job records
   */
  async getUserBulkReadJobs(userId, options = {}) {
    try {
      const { limit = 50, offset = 0, status } = options;
      
      const whereClause = {
        user_uuid: userId,
        provider: 'zoho'
      };
      
      if (status) {
        whereClause.status = status;
      }
      
      const jobs = await ZohoBulkReadJobs.findAll({
        where: whereClause,
        limit: parseInt(limit),
        offset: parseInt(offset),
        order: [['created_at', 'DESC']]
      });
      
      return jobs;
    } catch (error) {
      console.error('❌ Error getting user bulk read jobs:', error.message);
      throw error;
    }
  }
}

module.exports = new ZohoBulkReadRepository();