import java.util.Scanner;

import java.io.IOException;

import java.io.*;

import java.util.*;

import java.io.BufferedWriter;

import java.io.BufferedReader;

public class Customer

{

public String cus_id;

public String CNIC;

public String Name;

public String Phone_no;

public String Address;

public Character Cus_type;

public String Meter_type;

public String connec_date;

public int reg_hour_units;

public int peak_hour_units;

static String filename;

public Customer(String filename1)

{

this.filename=filename1;

}

public Customer(){}

public Customer(String cus_id, String CNIC, String Name, String Address, String Phone_no, char Cus_type, String Meter_type, String connec_date, int reg_hour_units, int peak_hour_units)

{

this.cus_id = cus_id;

this.CNIC = CNIC;

this.Name = Name;

this.Address = Address;

this.Phone_no = Phone_no;

this.Cus_type = Cus_type;

this.Meter_type = Meter_type;

this.connec_date = connec_date;

this.reg_hour_units = reg_hour_units;

this.peak_hour_units = peak_hour_units;

}

public void displayCustomerInfo() {

System.out.println("Customer ID: " + cus_id);

System.out.println("CNIC: " + CNIC);

System.out.println("Name: " + Name);

System.out.println("Address: " + Address);

System.out.println("Phone No: " + Phone_no);

System.out.println("Customer Type: " + Cus_type);

System.out.println("Meter Type: " + Meter_type);

System.out.println("Connection Date: " + connec_date);

System.out.println("Regular Hour Units: " + reg_hour_units);

System.out.println("Peak Hour Units: " + peak_hour_units);

System.out.println();

}

public static List<Customer> loadCustomerData() {

List<Customer> customerList = new ArrayList<>();

try {

BufferedReader reader = new BufferedReader(new FileReader(filename));

String line;

// Read file line by line

while ((line = reader.readLine()) != null) {

// Split line into parts by comma

String[] parts = line.split(",");

if (parts.length == 10) {

String cus_id = parts[0];

String CNIC = parts[1];

String Name = parts[2];

String Address = parts[3];

String Phone_no = parts[4];

char Cus_type = parts[5].charAt(0); // Assuming D or C for Domestic or Commercial

String Meter_type = parts[6];

String connec_date = parts[7];

int reg_hour_units = Integer.parseInt(parts[8]);

int peak_hour_units = Integer.parseInt(parts[9]);

// Create new Customer object and add to list

Customer customer = new Customer(cus_id, CNIC, Name, Address, Phone_no, Cus_type, Meter_type, connec_date, reg_hour_units, peak_hour_units);

customerList.add(customer);

}

}

reader.close();

} catch (IOException e) {

e.printStackTrace();

}

return customerList;

}

public void view_curr_bill(List<BillingInfo> billingInfos, List<Tax_tariff_info> pricingInfos) {

Scanner scanner = new Scanner(System.in);

// Step 1: Collect input from the user

System.out.print("Enter your 4-digit Customer ID: ");

String customerId = scanner.nextLine();

System.out.print("Enter your CNIC: ");

String enteredCNIC = scanner.nextLine();

System.out.print("Enter your Meter Type (1Phase/3Phase): ");

String enteredMeterType = scanner.nextLine();

System.out.print("Enter your current regular meter reading: ");

int currRegMeterReading = scanner.nextInt();

int currPeakMeterReading = 0;

if (enteredMeterType.equalsIgnoreCase("3Phase")) {

System.out.print("Enter your current peak meter reading: ");

currPeakMeterReading = scanner.nextInt();

}

// Step 2: Find matching customer

Customer matchedCustomer = null;

for (Customer customer : loadCustomerData()) {

if (customer.cus_id.equals(customerId) && customer.CNIC.equals(enteredCNIC)

&& customer.Meter_type.equalsIgnoreCase(enteredMeterType)) {

matchedCustomer = customer;

break;

}

}

if (matchedCustomer == null) {

System.out.println("Invalid Customer ID, CNIC, or Meter Type.");

return;

}

// Step 3: Find the tariff for the entered meter type

Tax_tariff_info matchedTariff = null;

for (Tax_tariff_info tariff : pricingInfos) {

if (tariff.meterType.equalsIgnoreCase(enteredMeterType)) {

matchedTariff = tariff;

break;

}

}

if (matchedTariff == null) {

System.out.println("No tariff information found for your meter type.");

return;

}

// Step 4: Find the billing information for the matched customer

BillingInfo matchedBillingInfo = null;

for (BillingInfo billingInfo : billingInfos) {

if (billingInfo.cus_id.equals(customerId)) {

matchedBillingInfo = billingInfo;

break;

}

}

if (matchedBillingInfo == null) {

System.out.println("No billing information found for your customer ID.");

return;

}

// Step 5: Calculate electricity cost

int regularUnitsConsumed = currRegMeterReading - matchedCustomer.reg_hour_units;

int peakUnitsConsumed = (enteredMeterType.equalsIgnoreCase("3Phase"))

? (currPeakMeterReading - matchedCustomer.peak_hour_units)

: 0;

int regCost = regularUnitsConsumed * matchedTariff.regularUnitPrice;

int peakCost = peakUnitsConsumed * (matchedTariff.peakHourUnitPrice != null ? matchedTariff.peakHourUnitPrice : 0);

int totalElectricityCost = regCost + peakCost;

// Step 6: Calculate total cost with tax and fixed charges

int taxAmount = (totalElectricityCost * matchedTariff.taxPercentage) / 100;

int totalAmountDue = totalElectricityCost + taxAmount + matchedTariff.fixedCharges;

// Step 7: Display the bill

System.out.println("\n--- Customer Information ---");

matchedCustomer.displayCustomerInfo();

System.out.println("--- Bill Information ---");

System.out.println("Billing Month: " + matchedBillingInfo.billing_month);

System.out.println("Current Regular Meter Reading: " + currRegMeterReading);

if (enteredMeterType.equalsIgnoreCase("3Phase")) {

System.out.println("Current Peak Meter Reading: " + currPeakMeterReading);

}

System.out.println("Electricity Cost (Regular): " + regCost);

if (enteredMeterType.equalsIgnoreCase("3Phase")) {

System.out.println("Electricity Cost (Peak): " + peakCost);

}

System.out.println("Sales Tax: " + taxAmount);

System.out.println("Fixed Charges: " + matchedTariff.fixedCharges);

System.out.println("Total Amount Due: " + totalAmountDue);

System.out.println("Due Date: " + matchedBillingInfo.due_date);

System.out.println("Bill Payment Status: " + matchedBillingInfo.bill_paid_status);

if (!matchedBillingInfo.payment_date.isEmpty()) {

System.out.println("Payment Date: " + matchedBillingInfo.payment_date);

}

System.out.println();

}

public void update_customer_data(List<Customer> cusInfos) {

Scanner scanner = new Scanner(System.in);

// Step 1: Ask the user for the customer ID to update

System.out.print("Enter the Customer ID of the customer you want to update: ");

String customerId = scanner.nextLine();

// Step 2: Find the customer in the list

Customer matchedCustomer = null;

for (Customer customer : cusInfos) {

if (customer.cus_id.equals(customerId)) {

matchedCustomer = customer;

break;

}

}

if (matchedCustomer == null) {

System.out.println("Customer with the given ID not found.");

return;

}

// Step 3: Ask the user what they want to update

System.out.println("What would you like to update?");

System.out.println("1. Customer ID");

System.out.println("2. Phone Number");

System.out.println("3. Address");

System.out.println("4. Regular Hour Units");

System.out.println("5. Peak Hour Units");

System.out.print("Enter your choice (1-5): ");

int choice = scanner.nextInt();

scanner.nextLine(); // Clear the buffer

switch (choice) {

case 1:

// Update Customer ID

System.out.print("Enter new Customer ID: ");

String newCusId = scanner.nextLine();

matchedCustomer.cus_id = newCusId;

break;

case 2:

// Update Phone Number

System.out.print("Enter new Phone Number: ");

String newPhone = scanner.nextLine();

matchedCustomer.Phone_no = newPhone;

break;

case 3:

// Update Address

System.out.print("Enter new Address: ");

String newAddress = scanner.nextLine();

matchedCustomer.Address = newAddress;

break;

case 4:

// Update Regular Hour Units

System.out.print("Enter new Regular Hour Units: ");

int newRegHours = scanner.nextInt();

matchedCustomer.reg_hour_units = newRegHours;

break;

case 5:

// Update Peak Hour Units (only for customers with 3-phase meters)

if (matchedCustomer.Meter_type.equalsIgnoreCase("3Phase")) {

System.out.print("Enter new Peak Hour Units: ");

int newPeakHours = scanner.nextInt();

matchedCustomer.peak_hour_units = newPeakHours;

} else {

System.out.println("This customer does not have a 3-phase meter.");

}

break;

default:

System.out.println("Invalid choice.");

return;

}

// Step 4: Save the updated customer list back into the file

try {

BufferedWriter writer = new BufferedWriter(new FileWriter(filename));

for (Customer customer : cusInfos) {

writer.write(customer.cus_id + "," + customer.CNIC + "," + customer.Name + "," + customer.Address + ","

+ customer.Phone_no + "," + customer.Cus_type + "," + customer.Meter_type + "," + customer.connec_date

+ "," + customer.reg_hour_units + "," + customer.peak_hour_units);

writer.newLine();

}

writer.close();

System.out.println("Customer data updated successfully.");

} catch (IOException e) {

e.printStackTrace();

System.out.println("Error updating customer data.");

}

}

public void add_row(List<Customer> cusInfos, List<BillingInfo> billInfos, List<NadraDB> nadraInfos) {

Scanner scanner = new Scanner(System.in);

// Step 1: Ask for CNIC

System.out.print("Enter CNIC of the customer: ");

String cnic = scanner.nextLine();

// Step 2: Check if the customer already has 3 meters installed

int meterCount = 0;

for (Customer customer : cusInfos) {

if (customer.CNIC.equals(cnic)) {

meterCount++;

}

}

// If meter limit reached, display message and return

if (meterCount >= 3) {

System.out.println("Meter limit reached for this customer.");

return;

}

// Step 3: Ask for customer details

System.out.println("Enter new meter information for the customer:");

System.out.print("Enter Customer ID: ");

String cusId = scanner.nextLine();

System.out.print("Enter Name: ");

String name = scanner.nextLine();

System.out.print("Enter Address: ");

String address = scanner.nextLine();

System.out.print("Enter Phone Number: ");

String phone = scanner.nextLine();

System.out.print("Enter Customer Type (D for Domestic, C for Commercial): ");

char cusType = scanner.nextLine().charAt(0);

System.out.print("Enter Meter Type (1Phase/3Phase): ");

String meterType = scanner.nextLine();

System.out.print("Enter Connection Date (dd/mm/yyyy): ");

String connecDate = scanner.nextLine();

System.out.print("Enter Regular Hour Units: ");

int regHourUnits = scanner.nextInt();

int peakHourUnits = 0;

if (meterType.equalsIgnoreCase("3Phase")) {

System.out.print("Enter Peak Hour Units: ");

peakHourUnits = scanner.nextInt();

}

// Step 4: Create and add the new customer to the list

Customer newCustomer = new Customer(cusId, cnic, name, address, phone, cusType, meterType, connecDate, regHourUnits, peakHourUnits);

cusInfos.add(newCustomer);

// Step 5: Ask for billing information and add to the billing list

System.out.println("Enter billing information:");

System.out.print("Enter Billing Month (as an integer, e.g., 1 for January): ");

int billingMonth = scanner.nextInt();

System.out.print("Enter Current Regular Meter Reading: ");

int currRegMeter = scanner.nextInt();

int currPeakMeter = 0;

if (meterType.equalsIgnoreCase("3Phase")) {

System.out.print("Enter Current Peak Meter Reading: ");

currPeakMeter = scanner.nextInt();

}

System.out.print("Enter Reading Date (dd/mm/yyyy): ");

scanner.nextLine(); // Clear the buffer

String readingDate = scanner.nextLine();

System.out.print("Enter Cost of Electricity: ");

int costOfElec = scanner.nextInt();

System.out.print("Enter Sales Tax: ");

int salesTax = scanner.nextInt();

System.out.print("Enter Fixed Charges: ");

int fixedCharges = scanner.nextInt();

int totalAmnt = costOfElec + salesTax + fixedCharges;

System.out.print("Enter Due Date (dd/mm/yyyy): ");

scanner.nextLine(); // Clear the buffer

String dueDate = scanner.nextLine();

System.out.print("Enter Bill Paid Status (Paid/Unpaid): ");

String billPaidStatus = scanner.nextLine();

System.out.print("Enter Payment Date (if paid, otherwise leave blank): ");

String paymentDate = scanner.nextLine();

// Step 6: Create and add the new billing info to the list

BillingInfo newBillingInfo = new BillingInfo(cusId, billingMonth, currRegMeter, currPeakMeter, readingDate, costOfElec, salesTax, fixedCharges, totalAmnt, dueDate, billPaidStatus, paymentDate);

billInfos.add(newBillingInfo);

// Step 7: Save the new customer and billing info to their respective files

try {

// Save customer info

BufferedWriter cusWriter = new BufferedWriter(new FileWriter(filename, true)); // Append mode

cusWriter.write(newCustomer.cus_id + "," + newCustomer.CNIC + "," + newCustomer.Name + "," + newCustomer.Address + ","

+ newCustomer.Phone_no + "," + newCustomer.Cus_type + "," + newCustomer.Meter_type + "," + newCustomer.connec_date + ","

+ newCustomer.reg_hour_units + "," + newCustomer.peak_hour_units);

cusWriter.newLine();

cusWriter.close();

// Save billing info

BufferedWriter billWriter = new BufferedWriter(new FileWriter("C:\\Users\\city\\Desktop\\java\\LESCO_Billing_System_in_Java\\data\\Billinginfo.txt", true));

// Append mode

billWriter.newLine();

billWriter.write(newBillingInfo.cus_id + "," + newBillingInfo.billing_month + "," + newBillingInfo.curr_reg_meter + "," + newBillingInfo.curr_reg_peak + ","

+ newBillingInfo.reading_date + "," + newBillingInfo.cost_of_elec + "," + newBillingInfo.sales_tax + ","

+ newBillingInfo.fixed_charges + "," + newBillingInfo.total_amnt + "," + newBillingInfo.due_date + ","

+ newBillingInfo.bill_paid_status + "," + newBillingInfo.payment_date);

billWriter.newLine();

billWriter.close();

System.out.println("New meter installed and customer/billing information saved successfully.");

} catch (IOException e) {

e.printStackTrace();

System.out.println("Error saving customer or billing data.");

}

}

}