package com.mydreamjob.application;

/**
 * 投递状态枚举
 *
 * SUBMITTED  — 学生已投递
 * VIEWED     — 企业已查看
 * INTERVIEW  — 进入面试阶段
 * REJECTED   — 已拒绝
 * HIRED      — 已录用
 */
public enum ApplicationStatus {
    SUBMITTED,
    VIEWED,
    INTERVIEW,
    REJECTED,
    HIRED,
    WITHDRAWN;  // 学生主动撤回

    /**
     * 校验状态流转是否合法
     */
    public boolean canTransitionTo(ApplicationStatus target) {
        if (target == null) return false;
        return switch (this) {
            case SUBMITTED -> target == VIEWED || target == REJECTED || target == WITHDRAWN;
            case VIEWED -> target == INTERVIEW || target == REJECTED || target == WITHDRAWN;
            case INTERVIEW -> target == REJECTED || target == HIRED;
            case REJECTED, HIRED, WITHDRAWN -> false; // 终态不可再流转
        };
    }
}