namespace SimpleAdmin.Application;

/// <summary>
/// 实现入职业务岗位业务能力。
/// </summary>
public class OnboardingPositionService : DbRepository<ObPosition>, IOnboardingPositionService
{
    /// <summary>
    /// 分页查询入职业务岗位。
    /// </summary>
    public async Task<SqlSugarPagedList<ObPosition>> Page(OnboardingPositionPageInput input)
    {
        return await Context.Queryable<ObPosition>()
            .WhereIF(input.CompanyId.HasValue, it => it.CompanyId == input.CompanyId.Value)
            .WhereIF(
                !string.IsNullOrWhiteSpace(input.PositionName),
                it => it.PositionName.Contains(input.PositionName) || it.PositionCode.Contains(input.PositionName))
            .WhereIF(!string.IsNullOrWhiteSpace(input.Status), it => it.Status == input.Status)
            .OrderByIF(!string.IsNullOrWhiteSpace(input.SortField), $"{input.SortField} {input.SortOrder}")
            .OrderBy(it => it.PositionName)
            .ToPagedListAsync(input.PageNum, input.PageSize);
    }

    /// <summary>
    /// 查询指定公司下全部已启用岗位。
    /// </summary>
    public Task<List<ObPosition>> ListEnabled(long companyId)
    {
        return Context.Queryable<ObPosition>()
            .Where(it => it.CompanyId == companyId && it.Status == "enable")
            .OrderBy(it => it.PositionName)
            .ToListAsync();
    }

    /// <summary>
    /// 查询岗位详情。
    /// </summary>
    public async Task<ObPosition> Detail(BaseIdInput input)
    {
        return await GetByIdAsync(input.Id) ?? throw Oops.Bah("岗位不存在");
    }

    /// <summary>
    /// 新增入职业务岗位。
    /// </summary>
    public async Task Add(OnboardingPositionAddInput input)
    {
        await EnsureCompanyExists(input.CompanyId);
        await EnsureCodeUnique(input.CompanyId, input.PositionCode, 0);
        await InsertAsync(input.Adapt<ObPosition>());
    }

    /// <summary>
    /// 编辑入职业务岗位。
    /// </summary>
    public async Task Edit(OnboardingPositionEditInput input)
    {
        await Detail(new BaseIdInput { Id = input.Id });
        await EnsureCompanyExists(input.CompanyId);
        await EnsureCodeUnique(input.CompanyId, input.PositionCode, input.Id);
        await UpdateAsync(input.Adapt<ObPosition>());
    }

    /// <summary>
    /// 删除未被任务或正式员工引用的岗位。
    /// </summary>
    public async Task Delete(BaseIdListInput input)
    {
        if (input.Ids.Count == 0)
            return;

        var hasTasks = await Context.Queryable<ObOnboardingTask>()
            .AnyAsync(it => input.Ids.Contains(it.PositionId));
        if (hasTasks)
            throw Oops.Bah("岗位已有入职任务，不能删除");

        var hasEmployees = await Context.Queryable<ObEmployee>()
            .AnyAsync(it => input.Ids.Contains(it.PositionId));
        if (hasEmployees)
            throw Oops.Bah("岗位已有正式员工，不能删除");

        await DeleteByIdsAsync(input.Ids.Cast<object>().ToArray());
    }

    private async Task EnsureCompanyExists(long companyId)
    {
        var exists = await Context.Queryable<ObCompany>().AnyAsync(it => it.Id == companyId);
        if (!exists)
            throw Oops.Bah("所属公司不存在或已删除");
    }

    private async Task EnsureCodeUnique(long companyId, string code, long id)
    {
        var exists = await Context.Queryable<ObPosition>()
            .AnyAsync(it => it.CompanyId == companyId && it.PositionCode == code && it.Id != id);
        if (exists)
            throw Oops.Bah("该公司下岗位编码已存在");
    }
}