package com.learn.service;

import com.learn.entity.Student;
import com.learn.service.jpa.StudentJpaService;
import com.learn.service.mp.StudentMpService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.domain.Page;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Optional;

@Service
public class StudentServiceSelector {

    private final StudentJpaService jpa;
    private final StudentMpService mp;

    @Value("${orm.mode:jpa}")
    private String mode;

    public StudentServiceSelector(StudentJpaService jpa, StudentMpService mp) {
        this.jpa = jpa; this.mp = mp;
    }

    private boolean useJpa() { return !"mp".equalsIgnoreCase(mode); }

    public Student add(Student s) { return useJpa() ? jpa.add(s) : mp.add(s); }

    public List<Student> list() { return useJpa() ? jpa.list() : mp.list(); }

    public Page<Student> listPage(int page, int size) {
        return useJpa() ? jpa.listPage(page, size) : mp.listPage(page, size);
    }

    public Student getById(Long id) { return useJpa() ? jpa.getById(id) : mp.getById(id); }

    public List<Student> search(String kw) { return useJpa() ? jpa.search(kw) : mp.search(kw); }

    public Optional<Student> update(Long id, Student s) { return useJpa() ? jpa.update(id, s) : mp.update(id, s); }

    public boolean delete(Long id) { return useJpa() ? jpa.delete(id) : mp.delete(id); }

    public long count() { return useJpa() ? jpa.count() : mp.count(); }

    public long countExcellent(int min) { return useJpa() ? jpa.countExcellent(min) : mp.countExcellent(min); }

    public String getActiveMode() { return useJpa() ? "JPA" : "MyBatis-Plus"; }
}