const sql = require('mssql');
const MSSQL_CONFIG = require('./config').MSSQL_CONFIG
const DRY_RUN = require('./config').DRY_RUN

class JtlSql {
    
  async getOrderOnLiefBest(liefBestNr) {
    try {
      const auftrag = await this.getBezugsAuftragsNrOnLiefBestNr(liefBestNr)
      if (!auftrag) return null
  
      await sql.connect(MSSQL_CONFIG);    
      
      const request = new sql.Request();
      request.input('cBestellNr', sql.VarChar, auftrag.cBezugsAuftragsNummer); 
      
      const query = `SELECT * FROM tBestellung WHERE cBestellNr = @cBestellNr`;
  
      const result = await request.query(query);      
      return result.recordset[0]
  
    } catch (error) {
      console.error('Error fetching BezugsAuftragsNummer:', error);
      return null;
    }
  }
  
  async getBezugsAuftragsNrOnLiefBestNr(liefBestNr) {
    try {
      await sql.connect(MSSQL_CONFIG);
      
      const request = new sql.Request();
      request.input('liefBestNr', sql.VarChar, liefBestNr); 
      
      const query = `SELECT cBezugsAuftragsNummer FROM tLieferantenBestellung WHERE cEigeneBestellnummer = @liefBestNr`;
      const result = await request.query(query);
      return result.recordset[0]
  
    } catch (error) {
      console.error('Error fetching BezugsAuftragsNummer:', error);
      return null;
    }
  }

  async getLieferscheinOnAuftragsnummer(auftragsNummer) {
    try {
      await sql.connect(MSSQL_CONFIG);
      
      const request = new sql.Request();
      request.input('auftragsNummer', sql.VarChar, auftragsNummer+'%'); 

      const query = `      
        SELECT TOP 1 *
        FROM tLieferschein
        WHERE cLieferscheinNr LIKE @auftragsNummer
      `;

      const result = await request.query(query);

      return result.recordset[0]|| null;
    } catch (error) {
      console.error('Error fetching Lieferschein:', error);
      return null;
    }
  }

  async getVersandPaketeOnLieferscheinId(kLieferschein) {
    try {
      await sql.connect(MSSQL_CONFIG);
      
      const request = new sql.Request();
      request.input('kLieferschein', sql.Int, kLieferschein); 

      const query = `      
        SELECT * FROM tVersand
        WHERE kLieferschein = @kLieferschein 
      `;

      const result = await request.query(query);

      return result.recordset
    } catch (error) {
      console.error('Error fetching Versand:', error);
      return null;
    }
  }

  async saveVersandPaket(paket) {
    if ('kVersand' in paket) {
      return await this.updateVersandPaket(paket)
    } else {
      return await this.insertVersandPaket(paket)
    }
  }


  async insertVersandPaket(paket) {
    try {
      await sql.connect(MSSQL_CONFIG);
      
      const request = new sql.Request();
      
      request.input('kLieferschein', sql.Int, paket.kLieferschein);    
      request.input('kBenutzer', sql.Int, paket.kBenutzer);    
      request.input('kLogistik', sql.Int, paket.kLogistik);    
      request.input('kVersandArt', sql.Int, paket.kVersandArt);    
      request.input('cIdentCode', sql.VarChar, paket.cIdentCode.toString());    
      request.input('cEnclosedReturnIdentCode', sql.VarChar, paket.cEnclosedReturnIdentCode.toString());
      request.input('dVersendet', sql.DateTime, paket.dVersendet);
      request.input('nStatus', sql.TinyInt, paket.nStatus);

      
      const query = `
        INSERT INTO tVersand 
          (kLieferschein, kBenutzer, kLogistik, nStatus, kVersandArt, cIdentCode, cEnclosedReturnIdentCode, dVersendet) 
        VALUES 
          (@kLieferschein, @kBenutzer, @kLogistik, @nStatus, @kVersandArt, @cIdentCode, @cEnclosedReturnIdentCode, @dVersendet)                              
      `;

      let fullQuery = DRY_RUN
      ? `BEGIN TRANSACTION;\n${query}\nROLLBACK TRANSACTION;`
      : query;
    
      const result = await request.query(fullQuery);
      
      return result.rowsAffected[0]
    } catch (error) {
      throw error
    }
  }

  async updateVersandPaket(paket) {
  
    try {
      await sql.connect(MSSQL_CONFIG);
      
      const request = new sql.Request();
      request.input('kVersand', sql.Int, paket.kVersand);    
      request.input('kLieferschein', sql.Int, paket.kLieferschein);    
      request.input('cIdentCode', sql.VarChar, paket.cIdentCode ? paket.cIdentCode.toString() : null);    
      request.input('cEnclosedReturnIdentCode', sql.VarChar, paket.cEnclosedReturnIdentCode ? paket.cEnclosedReturnIdentCode.toString() : null);
      request.input('dVersendet', sql.DateTime, paket.dVersendet);
      request.input('nStatus', sql.TinyInt, paket.nStatus);
      
      const query = `
        UPDATE tVersand SET          
          kLieferschein = @kLieferschein,
          nStatus = @nStatus,
          cIdentCode = @cIdentCode, 
          cEnclosedReturnIdentCode = @cEnclosedReturnIdentCode,          
          dVersendet = @dVersendet
        WHERE
          kVersand = @kVersand          
      `;

      let fullQuery = DRY_RUN
      ? `BEGIN TRANSACTION;\n${query}\nROLLBACK TRANSACTION;`
      : query;
    
      const result = await request.query(fullQuery);
      
      return result.rowsAffected[0]
    } catch (error) {      
      throw error     
    }
  }

  async getAdresse(kAdresse) {
    try {
        
      await sql.connect(MSSQL_CONFIG);    
      
      const request = new sql.Request();
      request.input('kAdresse', sql.Int, kAdresse); 
      
      const query = `SELECT * FROM tAdresse WHERE kAdresse = @kAdresse`;
  
      const result = await request.query(query);      
      return result.recordset[0]
  
    } catch (error) {
      throw error
    }
  }

 
}

module.exports = JtlSql