package model;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import java.util.Objects;

/**

* Represents a report in the POS system.

* Contains aggregated data for reporting purposes including sales, stock, and

* profit information.

*/

public class Report {

// Instance variables

private String reportId;

private String branchCode;

private Date reportDate;

private String reportType;

private List<Sale> salesData;

private List<Product> stockData;

private List<Double> profitData;

// Constants

private static final String DEFAULT_REPORT_TYPE = "GENERAL";

/**

* Default constructor

*/

public Report() {

this.reportDate = new Date();

this.reportType = DEFAULT_REPORT_TYPE;

this.salesData = new ArrayList<>();

this.stockData = new ArrayList<>();

this.profitData = new ArrayList<>();

}

/**

* Constructor with basic report information

*

* @param reportId unique identifier for the report

* @param branchCode branch code for the report

* @param reportType type of report

*/

public Report(String reportId, String branchCode, String reportType) {

this.reportId = reportId;

this.branchCode = branchCode;

this.reportType = reportType != null ? reportType : DEFAULT_REPORT_TYPE;

this.reportDate = new Date();

this.salesData = new ArrayList<>();

this.stockData = new ArrayList<>();

this.profitData = new ArrayList<>();

}

/**

* Constructor with all report details

*

* @param reportId unique identifier for the report

* @param branchCode branch code for the report

* @param reportDate date of the report

* @param reportType type of report

* @param salesData sales data for the report

* @param stockData stock data for the report

* @param profitData profit data for the report

*/

public Report(String reportId, String branchCode, Date reportDate, String reportType,

List<Sale> salesData, List<Product> stockData, List<Double> profitData) {

this.reportId = reportId;

this.branchCode = branchCode;

this.reportDate = reportDate != null ? new Date(reportDate.getTime()) : new Date();

this.reportType = reportType != null ? reportType : DEFAULT_REPORT_TYPE;

this.salesData = salesData != null ? new ArrayList<>(salesData) : new ArrayList<>();

this.stockData = stockData != null ? new ArrayList<>(stockData) : new ArrayList<>();

this.profitData = profitData != null ? new ArrayList<>(profitData) : new ArrayList<>();

}

// Business logic methods

/**

* Get the total sales amount from sales data

*

* @return total sales amount

*/

public double getTotalSalesAmount() {

return salesData.stream()

.mapToDouble(Sale::getTotalAmount)

.sum();

}

/**

* Get the total number of sales transactions

*

* @return number of sales

*/

public int getTotalSalesCount() {

return salesData.size();

}

/**

* Get the total stock value from stock data

*

* @return total stock value

*/

public double getTotalStockValue() {

return stockData.stream()

.mapToDouble(Product::getStockValue)

.sum();

}

/**

* Get the total number of products in stock

*

* @return number of products

*/

public int getTotalProductCount() {

return stockData.size();

}

/**

* Get the total profit from profit data

*

* @return total profit

*/

public double getTotalProfit() {

return profitData.stream()

.mapToDouble(Double::doubleValue)

.sum();

}

/**

* Get the average profit per transaction

*

* @return average profit, or 0 if no sales

*/

public double getAverageProfit() {

if (salesData.isEmpty()) {

return 0.0;

}

return getTotalProfit() / salesData.size();

}

/**

* Check if the report has any data

*

* @return true if report has any data, false otherwise

*/

public boolean hasData() {

return !salesData.isEmpty() || !stockData.isEmpty() || !profitData.isEmpty();

}

/**

* Get the report summary as a formatted string

*

* @return formatted summary

*/

public String getSummary() {

return String.format("Report %s - Branch: %s, Sales: %d, Stock Value: $%.2f, Profit: $%.2f",

reportId, branchCode, getTotalSalesCount(), getTotalStockValue(), getTotalProfit());

}

/**

* Add a sale to the report

*

* @param sale sale to add

*/

public void addSale(Sale sale) {

if (sale != null) {

salesData.add(sale);

}

}

/**

* Add a product to the stock data

*

* @param product product to add

*/

public void addProduct(Product product) {

if (product != null) {

stockData.add(product);

}

}

/**

* Add profit data to the report

*

* @param profit profit amount to add

*/

public void addProfit(double profit) {

profitData.add(profit);

}

// Getters and Setters

public String getReportId() {

return reportId;

}

public void setReportId(String reportId) {

this.reportId = reportId;

}

public String getBranchCode() {

return branchCode;

}

public void setBranchCode(String branchCode) {

this.branchCode = branchCode;

}

public Date getReportDate() {

return reportDate != null ? new Date(reportDate.getTime()) : null;

}

public void setReportDate(Date reportDate) {

this.reportDate = reportDate != null ? new Date(reportDate.getTime()) : new Date();

}

public String getReportType() {

return reportType;

}

public void setReportType(String reportType) {

this.reportType = reportType != null ? reportType : DEFAULT_REPORT_TYPE;

}

public List<Sale> getSalesData() {

return new ArrayList<>(salesData); // Return a copy to prevent external modification

}

public void setSalesData(List<Sale> salesData) {

this.salesData = salesData != null ? new ArrayList<>(salesData) : new ArrayList<>();

}

public List<Product> getStockData() {

return new ArrayList<>(stockData); // Return a copy to prevent external modification

}

public void setStockData(List<Product> stockData) {

this.stockData = stockData != null ? new ArrayList<>(stockData) : new ArrayList<>();

}

public List<Double> getProfitData() {

return new ArrayList<>(profitData); // Return a copy to prevent external modification

}

public void setProfitData(List<Double> profitData) {

this.profitData = profitData != null ? new ArrayList<>(profitData) : new ArrayList<>();

}

// Object methods

@Override

public String toString() {

return String.format("Report{id='%s', branch='%s', type='%s', date=%s}",

reportId, branchCode, reportType, reportDate);

}

@Override

public boolean equals(Object obj) {

if (this == obj)

return true;

if (obj == null || getClass() != obj.getClass())

return false;

Report report = (Report) obj;

return Objects.equals(reportId, report.reportId);

}

@Override

public int hashCode() {

return Objects.hash(reportId);

}

}