/**
 * 员工培训系统主应用类
 * 演示整个培训系统的功能
 */
package com.employeetraining;

import com.employeetraining.model.Employee;
import com.employeetraining.history.EmployeeHistory;
import com.employeetraining.course.Course;
import com.employeetraining.course.CourseManager;
import com.employeetraining.course.CourseManagerImpl;
import com.employeetraining.training.TrainingRecord;
import com.employeetraining.training.TrainingManager;
import com.employeetraining.training.TrainingManagerImpl;
import com.employeetraining.certificate.Certificate;
import com.employeetraining.certificate.CertificateManager;
import com.employeetraining.certificate.CertificateManagerImpl;
import com.employeetraining.util.IdGenerator;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.List;

public class EmployeeTrainingSystemApp {
    
    private static final IdGenerator idGenerator = IdGenerator.getInstance();
    private static final CourseManager courseManager = new CourseManagerImpl();
    private static final TrainingManager trainingManager = new TrainingManagerImpl();
    private static final CertificateManager certificateManager = new CertificateManagerImpl();
    
    public static void main(String[] args) {
        System.out.println("===== 员工培训系统演示 =====");
        
        // 创建员工
        Employee employee1 = new Employee(
                "EMP001",
                "张三",
                "技术部",
                "软件工程师",
                12000.0,
                "zhangsan@company.com"
        );
        
        // 记录员工历史变更
        EmployeeHistory employeeHistory = new EmployeeHistory(employee1.getEmployeeId());
        employeeHistory.recordPositionChange("助理工程师", employee1.getPosition());
        employeeHistory.recordSalaryChange(8000.0, employee1.getSalary());
        
        // 创建课程
        createCourses();
        
        // 显示所有课程
        System.out.println("\n所有课程：");
        List<Course> allCourses = courseManager.getAllCourses();
        for (Course course : allCourses) {
            System.out.println(course);
        }
        
        // 创建培训记录
        createTrainingRecords(employee1.getEmployeeId());
        
        // 显示员工的培训记录
        System.out.println("\n张三的培训记录：");
        List<TrainingRecord> employeeTrainings = trainingManager.findTrainingRecordsByEmployeeId(employee1.getEmployeeId());
        for (TrainingRecord record : employeeTrainings) {
            System.out.println(record);
        }
        
        // 颁发证书
        issueCertificates(employee1.getEmployeeId());
        
        // 显示员工的证书
        System.out.println("\n张三的证书：");
        List<Certificate> employeeCertificates = certificateManager.findCertificatesByEmployeeId(employee1.getEmployeeId());
        for (Certificate cert : employeeCertificates) {
            System.out.println(cert);
        }
        
        // 显示员工历史记录
        System.out.println("\n张三的历史记录：");
        List<EmployeeHistory.HistoryRecord> historyRecords = employeeHistory.getAllRecords();
        for (EmployeeHistory.HistoryRecord record : historyRecords) {
            System.out.println(record);
        }
        
        System.out.println("\n===== 演示完成 =====");
    }
    
    private static void createCourses() {
        Course course1 = new Course(
                "CSE001",
                "Java编程基础",
                "Java语言的基础知识和核心概念",
                40,
                "李老师",
                "编程语言",
                true
        );
        
        Course course2 = new Course(
                "CSE002",
                "Spring Boot框架",
                "Spring Boot的核心特性和实践应用",
                30,
                "王老师",
                "框架",
                true
        );
        
        Course course3 = new Course(
                "CSE003",
                "项目管理基础",
                "项目管理的基本理论和方法",
                20,
                "张老师",
                "管理",
                false
        );
        
        courseManager.addCourse(course1);
        courseManager.addCourse(course2);
        courseManager.addCourse(course3);
    }
    
    private static void createTrainingRecords(String employeeId) {
        TrainingRecord record1 = new TrainingRecord(
                idGenerator.generateTrainingRecordId(),
                employeeId,
                "CSE001",
                LocalDate.now().minusDays(10),
                95.0,
                TrainingRecord.TrainingStatus.COMPLETED,
                "学习认真，表现优异"
        );
        
        TrainingRecord record2 = new TrainingRecord(
                idGenerator.generateTrainingRecordId(),
                employeeId,
                "CSE002",
                LocalDate.now().minusDays(5),
                92.0,
                TrainingRecord.TrainingStatus.COMPLETED,
                "理解透彻，能举一反三"
        );
        
        TrainingRecord record3 = new TrainingRecord(
                idGenerator.generateTrainingRecordId(),
                employeeId,
                "CSE003",
                null,
                0.0,
                TrainingRecord.TrainingStatus.IN_PROGRESS,
                null
        );
        
        trainingManager.createTrainingRecord(record1);
        trainingManager.createTrainingRecord(record2);
        trainingManager.createTrainingRecord(record3);
    }
    
    private static void issueCertificates(String employeeId) {
        Certificate cert1 = new Certificate(
                idGenerator.generateCertificateId(),
                employeeId,
                "CSE001",
                "Java编程基础认证",
                LocalDate.now().minusDays(9),
                LocalDate.now().plusYears(3),
                "技术培训部",
                Certificate.CertificateStatus.ACTIVE
        );
        
        Certificate cert2 = new Certificate(
                idGenerator.generateCertificateId(),
                employeeId,
                "CSE002",
                "Spring Boot框架认证",
                LocalDate.now().minusDays(4),
                LocalDate.now().plusYears(3),
                "技术培训部",
                Certificate.CertificateStatus.ACTIVE
        );
        
        certificateManager.issueCertificate(cert1);
        certificateManager.issueCertificate(cert2);
    }
}