package com.cs102.attendance;

import com.cs102.attendance.entity.*;
import com.cs102.attendance.service.*;
import com.cs102.attendance.repository.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

import java.time.LocalDate;
import java.time.LocalTime;
import java.util.Optional;

@Component
public class DatabaseTestRunner implements CommandLineRunner {

    @Autowired private StudentService studentService;
    @Autowired private SessionService sessionService;
    @Autowired private StudentRepository studentRepository;
    @Autowired private SessionRepository sessionRepository;
    
    @Override
    public void run(String... args) throws Exception {
        System.out.println("\nTESTING DATABASE OPERATIONS...\n");
        
        try {
            // 1. Test Student Creation (or find existing)
            System.out.println("1. Checking/Creating test student...");
            Student student;
            Optional<Student> existingStudent = studentRepository.findByCode("TEST001");
            
            if (existingStudent.isPresent()) {
                student = existingStudent.get();
                System.out.println("Found existing test student: " + student.getName() + " (ID: " + student.getId() + ")");
            } else {
                student = studentService.enrol("TEST001", "John Doe", "CS102", "Group A", "john@test.com", "123-456-7890");
                System.out.println("Created new test student: " + student.getName() + " (ID: " + student.getId() + ")");
            }
            
            // 2. Test Session Creation (or find existing)
            System.out.println("\n2. Checking/Creating test session...");
            Session session;
            Optional<Session> existingSession = sessionRepository.findByNameAndDate("Test Lecture", LocalDate.now());
            
            if (existingSession.isPresent()) {
                session = existingSession.get();
                System.out.println("Found existing test session: " + session.getName() + " (ID: " + session.getId() + ")");
            } else {
                session = sessionService.createSession("Test Lecture", LocalDate.now(), LocalTime.of(9, 0), LocalTime.of(11, 0));
                System.out.println("Created new test session: " + session.getName() + " (ID: " + session.getId() + ")");
            }
            
            // 3. Test Face Data Upload (check if already exists)
            System.out.println("\n3. Checking/Uploading face data...");
            try {
                FaceData faceData = studentService.uploadFaceImage(student.getId(), "http://example.com/face.jpg");
                System.out.println("Uploaded face data (ID: " + faceData.getId() + ")");
            } catch (Exception e) {
                System.out.println("Face data upload skipped (likely already exists): " + e.getMessage());
            }
            
            // 4. Test database queries (always run these tests)
            System.out.println("\n4. Testing database queries...");
            var students = studentService.getAllStudents();
            System.out.println("Found " + students.size() + " student(s) in database");
            
            // 5. Test today's sessions query
            System.out.println("\n5. Testing session queries...");
            var sessions = sessionService.getTodaySessions();
            System.out.println("Found " + sessions.size() + " session(s) for today");
            
            // 6. Test connection integrity
            System.out.println("\n6. Testing connection integrity...");
            Optional<Student> retrievedStudent = studentService.getStudentById(student.getId());
            if (retrievedStudent.isPresent()) {
                System.out.println("Student retrieval test: PASSED");
            } else {
                System.out.println("Student retrieval test: FAILED");
            }
            
            System.out.println("\nALL DATABASE TESTS PASSED!");
            System.out.println("Database is working correctly with persistent data.\n");
            
        } catch (Exception e) {
            System.err.println("DATABASE TEST FAILED: " + e.getMessage());
            e.printStackTrace();
        }
    }
}