/*
 * View_browse.java
 *
 * Created on February 11, 2008, 6:05 PM
 */
package GUI;

import java.util.ArrayList;
import java.text.DecimalFormat;

import Business.BusinessManager;
import Business.product;
import Business.category;

/**
 * This class contains a Java Applet which allows a user to browse through the categories
 * and products with 4 simple buttons.
 * 
 * @author  ScarS @ HvA
 */
public class View_browse extends javax.swing.JApplet {

  private BusinessManager businessManager;
  private int categoryId,  productId;
  private boolean prevCatDisabled = true,  prevProdDisabled = true,  nextCatDisabled = false,  nextProdDisabled = false;

  /**
   * Add linebreaks (paragraphs) to a string so it will not show up as one long line but instead 
   * breaks up so the text will be displayed under eachother. The lines are checked if they contain
   * a white space so the string is preferably being broken into pieces on white spaces.
   * 
   * function created by ScarS @ HvA
   * 
   * @param str The string being put in that has to be split up
   * @param breakLen The maximum character length of each line
   * @return ret The formatted string
   */
  private String addLinebreaks(String str, int breakLen) {

    /** if the string is already smaller then the break length return it */
    if (str.length() < breakLen) {
      return str;
    }

    /** offset where to break the string, has to start at 0 */
    int indexNum = 0;

    String tmp = "", ret = "";

    for (int i = 0,  j = 0; i < str.length(); i += breakLen, j++) {

      /** take the part of the string that has to be processed */
      tmp = str.substring(indexNum);

      /** check if the string still has to be broken */
      if (tmp.length() > breakLen) {

        /** break the string into the maximum break length */
        tmp = tmp.substring(0, breakLen);

        /** remove white spaces from the start and end of the line */
        for (int k = 0; k < tmp.length(); k++) {

          if (tmp.startsWith(" ")) {
            tmp = tmp.substring(1, tmp.length());
          }

          if (tmp.endsWith(" ")) {
            tmp = tmp.substring(0, tmp.length() - 1);
          }
        }

        /** check if the line contains a white space */
        if (tmp.contains(" ")) {

          /** try to split the line into words */
          try {

            /** split the line into words on white spaces */
            String[] subTmp = tmp.split(" ");

            String subStr = "";

            /** add the complete words to the line */
            for (int k = 0; k < (subTmp.length - 1); k++) {
              subStr += subTmp[k] + " ";
            }

            /** set the break offset */
            indexNum = (ret.length() + subStr.length() - (3 * j));

            /** add the line to the return string */
            ret += subStr.substring(0, subStr.length() - 1) + "<p>";

          /** if the line has not been able to break on white spaces add it to the return string with an ending dash */
          } catch (ArrayIndexOutOfBoundsException e) {

            indexNum += breakLen;
            ret += tmp + "-<p>";
          }

        /** if the line does not contain white spaces add it to the return string with an ending dash */
        } else {

          indexNum += breakLen;
          ret += tmp + "-<p>";
        }

        /** if this is the last part of the string add the last line */
        if (str.substring(indexNum).length() <= breakLen) {
          ret += str.substring(indexNum);
        }
      }

      i = indexNum;
    }

    /** return the formatted string */
    return "<html>" + ret + "</html>";
  }

  private void updateProduct() {

    ArrayList products = businessManager.getProducts();

    int lastProdId = 0;
    double prodPrice = 0.00;
    String prodName = "", prodDescr = "";

    for (int i = 0; i < products.size(); i++) {

      product prod = (product) products.get(i);

      if (i == 0) {

        productId = prod.getProduct_id();
        prodName = prod.getName();
        prodPrice = prod.getPrice();
        prodDescr = prod.getDescription();
      }

      lastProdId = prod.getProduct_id();
    }

    DecimalFormat Currency = new DecimalFormat("#0.00");

    lblCatName.setText(businessManager.mainModel.getCategoryName());
    lblName.setText(prodName);
    lblPrice.setText("€ " + Currency.format(prodPrice));
    lblDescr.setText(addLinebreaks(prodDescr, 50));

    btnPrevProd.setEnabled(false);
    prevProdDisabled = true;

    if (productId == lastProdId) {

      btnNextProd.setEnabled(false);
      nextProdDisabled = true;

    } else if (nextProdDisabled) {

      btnNextProd.setEnabled(true);
      nextProdDisabled = false;
    }
  }

  /** Initializes the applet View_browse */
  public void init() {

    this.setSize(450, 300);

    businessManager = new BusinessManager();

    try {

      java.awt.EventQueue.invokeAndWait(new Runnable() {

        public void run() {

          initComponents();

          ArrayList categories = businessManager.dataManager.getCategoriesById();
          category cat = (category) categories.get(0);

          categoryId = cat.getCategory_id();

          businessManager.mainModel.setCategory(categoryId);

          btnPrevCat.setEnabled(false);
          
          updateProduct();
        }
      });

    } catch (Exception ex) {

      ex.printStackTrace();
    }
  }

  /** This method is called from within the init() method to
   * initialize the form.
   * WARNING: Do NOT modify this code. The content of this method is
   * always regenerated by the Form Editor.
   */
  // <editor-fold defaultstate="collapsed" desc="Generated Code">
  private void initComponents() {

    btnPrevCat = new javax.swing.JButton();
    btnPrevProd = new javax.swing.JButton();
    btnNextProd = new javax.swing.JButton();
    btnNextCat = new javax.swing.JButton();
    lblBrowse = new javax.swing.JLabel();
    lblCatNameHead = new javax.swing.JLabel();
    lblNameHead = new javax.swing.JLabel();
    lblDescrHead = new javax.swing.JLabel();
    lblCatName = new javax.swing.JLabel();
    lblName = new javax.swing.JLabel();
    lblDescr = new javax.swing.JLabel();
    lblPriceHead = new javax.swing.JLabel();
    lblPrice = new javax.swing.JLabel();

    btnPrevCat.setText("Previous category");
    btnPrevCat.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        btnPrevCatActionPerformed(evt);
      }
    });

    btnPrevProd.setText("Previous product");
    btnPrevProd.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        btnPrevProdActionPerformed(evt);
      }
    });

    btnNextProd.setText("Next product");
    btnNextProd.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        btnNextProdActionPerformed(evt);
      }
    });

    btnNextCat.setText("Next category");
    btnNextCat.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        btnNextCatActionPerformed(evt);
      }
    });

    lblBrowse.setFont(new java.awt.Font("Tahoma", 1, 18));
    lblBrowse.setText("Browse products");

    lblCatNameHead.setFont(new java.awt.Font("Tahoma", 1, 12));
    lblCatNameHead.setText("Category name:");

    lblNameHead.setFont(new java.awt.Font("Tahoma", 1, 12));
    lblNameHead.setText("Product name:");

    lblDescrHead.setFont(new java.awt.Font("Tahoma", 1, 12));
    lblDescrHead.setText("Product description:");

    lblCatName.setFont(new java.awt.Font("Tahoma", 0, 12));
    lblCatName.setText("Category name");

    lblName.setFont(new java.awt.Font("Tahoma", 0, 12));
    lblName.setText("Product name");

    lblDescr.setFont(new java.awt.Font("Tahoma", 0, 12));
    lblDescr.setText("Product description");
    lblDescr.setVerticalAlignment(javax.swing.SwingConstants.TOP);

    lblPriceHead.setFont(new java.awt.Font("Tahoma", 1, 12));
    lblPriceHead.setText("Product price:");

    lblPrice.setFont(new java.awt.Font("Tahoma", 0, 12));
    lblPrice.setText("Product price");

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
      .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
        .addGap(21, 21, 21)
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
          .addGroup(layout.createSequentialGroup()
            .addGap(28, 28, 28)
            .addComponent(lblCatNameHead)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(lblCatName, javax.swing.GroupLayout.DEFAULT_SIZE, 266, Short.MAX_VALUE))
          .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
              .addComponent(lblPriceHead)
              .addComponent(lblNameHead)
              .addComponent(lblDescrHead))
            .addGap(14, 14, 14)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
              .addComponent(lblDescr, javax.swing.GroupLayout.DEFAULT_SIZE, 262, Short.MAX_VALUE)
              .addComponent(lblName, javax.swing.GroupLayout.DEFAULT_SIZE, 262, Short.MAX_VALUE)
              .addComponent(lblPrice, javax.swing.GroupLayout.DEFAULT_SIZE, 262, Short.MAX_VALUE))))
        .addGap(19, 19, 19))
      .addGroup(layout.createSequentialGroup()
        .addGap(84, 84, 84)
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
          .addGroup(layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
              .addComponent(btnPrevCat)
              .addComponent(btnPrevProd))
            .addGap(26, 26, 26)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
              .addComponent(btnNextProd)
              .addComponent(btnNextCat)))
          .addGroup(layout.createSequentialGroup()
            .addGap(67, 67, 67)
            .addComponent(lblBrowse)))
        .addContainerGap(111, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
      .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
        .addContainerGap()
        .addComponent(lblBrowse)
        .addGap(18, 18, 18)
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
          .addComponent(btnNextCat)
          .addGroup(layout.createSequentialGroup()
            .addComponent(btnPrevCat)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
              .addComponent(btnPrevProd)
              .addComponent(btnNextProd))))
        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 29, Short.MAX_VALUE)
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
          .addComponent(lblCatNameHead)
          .addComponent(lblCatName))
        .addGap(15, 15, 15)
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
          .addComponent(lblNameHead)
          .addGroup(layout.createSequentialGroup()
            .addComponent(lblName)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
              .addComponent(lblPriceHead)
              .addComponent(lblPrice))))
        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
          .addComponent(lblDescr, javax.swing.GroupLayout.PREFERRED_SIZE, 78, javax.swing.GroupLayout.PREFERRED_SIZE)
          .addComponent(lblDescrHead))
        .addContainerGap())
    );
  }// </editor-fold>

  private void btnPrevCatActionPerformed(java.awt.event.ActionEvent evt) {                                           
    // TODO add your handling code here:
    try {

      ArrayList categories = businessManager.dataManager.getCategoriesById();

      int firstCatId = 0, prevCatId = 0;

      for (int i = 0; i < categories.size(); i++) {

        category cat = (category) categories.get(i);

        if (i == 0) {
          firstCatId = cat.getCategory_id();
        }

        if (categoryId == cat.getCategory_id()) {
          categoryId = prevCatId;
        }

        prevCatId = cat.getCategory_id();
      }

      if (categoryId == firstCatId) {

        btnPrevCat.setEnabled(false);
        prevCatDisabled = true;
      }

      if (nextCatDisabled == true) {

        btnNextCat.setEnabled(true);
        nextCatDisabled = false;
      }

      businessManager.mainModel.setCategory(categoryId);

      updateProduct();

    } catch (Exception e) {
      System.out.println("error: " + e);
    }
    
}                                          

  private void btnNextCatActionPerformed(java.awt.event.ActionEvent evt) {                                           
    // TODO add your handling code here:
    try {

      ArrayList categories = businessManager.dataManager.getCategoriesById();

      int j = 0, lastCatId = 0;

      for (int i = 1; i < (categories.size() + 1); i++) {

        category cat = (category) categories.get(i - 1);

        if (categoryId == cat.getCategory_id()) {
          j = i + 1;
        }

        if (j == i) {
          categoryId = cat.getCategory_id();
        }

        lastCatId = cat.getCategory_id();
      }

      if (categoryId == lastCatId) {

        btnNextCat.setEnabled(false);
        nextCatDisabled = true;
      }

      if (prevCatDisabled == true) {

        btnPrevCat.setEnabled(true);
        prevCatDisabled = false;
      }

      businessManager.mainModel.setCategory(categoryId);

      updateProduct();

    } catch (Exception e) {
      System.out.println("error: " + e);
    }
    
  }                                          

  private void btnPrevProdActionPerformed(java.awt.event.ActionEvent evt) {                                            
    // TODO add your handling code here:
    try {

      ArrayList products = businessManager.getProducts();

      int firstProdId = 0, prevProdId = 0;
      double prodPrice = 0.00, prevProdPrice = 0.00;
      String prodName = null, prodDescr = null, prevProdName = null, prevProdDescr = null;

      for (int i = 0; i < products.size(); i++) {

        product prod = (product) products.get(i);

        if (i == 0) {
          firstProdId = prod.getProduct_id();
        }

        if (productId == prod.getProduct_id()) {

          productId = prevProdId;
          prodName = prevProdName;
          prodPrice = prevProdPrice;
          prodDescr = prevProdDescr;
        }

        prevProdId = prod.getProduct_id();
        prevProdName = prod.getName();
        prevProdPrice = prod.getPrice();
        prevProdDescr = prod.getDescription();
      }

      if (productId == firstProdId) {

        btnPrevProd.setEnabled(false);
        prevProdDisabled = true;
      }

      if (nextProdDisabled == true) {

        btnNextProd.setEnabled(true);
        nextProdDisabled = false;
      }

      DecimalFormat Currency = new DecimalFormat("#0.00");

      lblName.setText(prodName);
      lblPrice.setText("€ " + Currency.format(prodPrice));
      lblDescr.setText(addLinebreaks(prodDescr, 50));

    } catch (Exception e) {
      System.out.println("error: " + e);
    }
    
  }                                           

  private void btnNextProdActionPerformed(java.awt.event.ActionEvent evt) {                                            
    // TODO add your handling code here:
    try {

      ArrayList products = businessManager.getProducts();

      int j = 0, lastProdId = 0;
      double prodPrice = 0.00;
      String prodName = null, prodDescr = null;

      for (int i = 1; i < (products.size() + 1); i++) {

        product prod = (product) products.get(i - 1);

        if (productId == prod.getProduct_id()) {
          j = i + 1;
        }

        if (j == i) {
          productId = prod.getProduct_id();
          prodName = prod.getName();
          prodPrice = prod.getPrice();
          prodDescr = prod.getDescription();
        }

        lastProdId = prod.getProduct_id();
      }

      if (productId == lastProdId) {

        btnNextProd.setEnabled(false);
        nextProdDisabled = true;
      }

      if (prevProdDisabled == true) {

        btnPrevProd.setEnabled(true);
        prevProdDisabled = false;
      }

      DecimalFormat Currency = new DecimalFormat("#0.00");

      lblName.setText(prodName);
      lblPrice.setText("€ " + Currency.format(prodPrice));
      lblDescr.setText(addLinebreaks(prodDescr, 50));

    } catch (Exception e) {
      System.out.println("error: " + e);
    }
    
  }                                           

  // Variables declaration - do not modify
  private javax.swing.JButton btnNextCat;
  private javax.swing.JButton btnNextProd;
  private javax.swing.JButton btnPrevCat;
  private javax.swing.JButton btnPrevProd;
  private javax.swing.JLabel lblBrowse;
  private javax.swing.JLabel lblCatName;
  private javax.swing.JLabel lblCatNameHead;
  private javax.swing.JLabel lblDescr;
  private javax.swing.JLabel lblDescrHead;
  private javax.swing.JLabel lblName;
  private javax.swing.JLabel lblNameHead;
  private javax.swing.JLabel lblPrice;
  private javax.swing.JLabel lblPriceHead;
  // End of variables declaration
}