namespace SimpleAdmin.Application;

/// <summary>
/// 统一校验候选人身份，避免同一人员通过多个链接重复提交入职资料。
/// </summary>
public class OnboardingIdentityValidationService : IOnboardingIdentityValidationService
{
    private readonly SqlSugarScope _db;

    public OnboardingIdentityValidationService()
    {
        _db = DbContext.DB;
    }

    /// <inheritdoc />
    public async Task EnsureNoDuplicate(
        long currentTaskId,
        string employeeName,
        string idCardNumber)
    {
        employeeName = employeeName?.Trim();
        idCardNumber = idCardNumber?.Trim().ToUpperInvariant();
        if (string.IsNullOrWhiteSpace(employeeName) || string.IsNullOrWhiteSpace(idCardNumber))
            return;

        var formalEmployeeExists = await _db.Queryable<ObEmployee>()
            .AnyAsync(item => item.EmployeeName == employeeName
                              && item.IdCardNumber == idCardNumber);
        if (formalEmployeeExists)
        {
            throw Oops.Bah("该姓名和身份证号已完成正式员工建档，请勿重复提交入职资料");
        }

        // 身份证号码代表唯一自然人。即使姓名填写不同，也不能绕过正式员工重复校验。
        var formalEmployeeIdCardExists = await _db.Queryable<ObEmployee>()
            .AnyAsync(item => item.IdCardNumber == idCardNumber);
        if (formalEmployeeIdCardExists)
        {
            throw Oops.Bah("该身份证号码已完成正式员工建档，请核对姓名和身份证号码；如需更正，请联系 HR");
        }

        // 待填写任务不占用身份，以实际先提交的任务为准；撤销或过期任务允许重新发起。
        var duplicateTaskExists = await _db.Queryable<ObTaskEmployeeInfo>()
            .InnerJoin<ObOnboardingTask>((info, task) => info.TaskId == task.Id)
            .Where((info, task) => info.TaskId != currentTaskId
                                   && info.EmployeeName == employeeName
                                   && info.IdCardNumber == idCardNumber
                                   && (task.TaskStatus == OnboardingTaskStatus.Reviewing
                                       || task.TaskStatus == OnboardingTaskStatus.Rejected
                                       || task.TaskStatus == OnboardingTaskStatus.Approved
                                       || task.TaskStatus == OnboardingTaskStatus.Archived))
            .AnyAsync();
        if (duplicateTaskExists)
        {
            throw Oops.Bah("该姓名和身份证号已存在正在办理的入职任务，请勿重复提交；如需补充材料，请联系 HR 继续使用原任务链接");
        }

        // 再单独按身份证号码校验，防止不同姓名使用同一证件重复提交不同任务。
        var duplicateIdCardTaskExists = await _db.Queryable<ObTaskEmployeeInfo>()
            .InnerJoin<ObOnboardingTask>((info, task) => info.TaskId == task.Id)
            .Where((info, task) => info.TaskId != currentTaskId
                                   && info.IdCardNumber == idCardNumber
                                   && (task.TaskStatus == OnboardingTaskStatus.Reviewing
                                       || task.TaskStatus == OnboardingTaskStatus.Rejected
                                       || task.TaskStatus == OnboardingTaskStatus.Approved
                                       || task.TaskStatus == OnboardingTaskStatus.Archived))
            .AnyAsync();
        if (duplicateIdCardTaskExists)
        {
            throw Oops.Bah("该身份证号码已存在正在办理的入职任务，请核对姓名和身份证号码；如需补充材料，请联系 HR 继续使用原任务链接");
        }
    }
}