using MediatR;
using CellularManagement.Application.Common;
using System;
using CellularManagement.Domain.Common;
using System.Collections.Generic;

namespace CellularManagement.Application.Features.Roles.Queries;

/// <summary>
/// 获取所有角色的查询，支持分页和按名称模糊查询
/// </summary>
public sealed record GetAllRolesQuery(
    int PageNumber = 1,
    int PageSize = 10,
    string? RoleName = null
) : IRequest<OperationResult<GetAllRolesResponse>>;

/// <summary>
/// 获取所有角色响应，包含角色列表和分页信息
/// </summary>
public sealed record GetAllRolesResponse(
    List<RoleDto> Roles,
    int TotalCount,
    int PageNumber,
    int PageSize
)
{
    public int TotalPages => (int)Math.Ceiling(TotalCount / (double)PageSize);
    public bool HasPreviousPage => PageNumber > 1;
    public bool HasNextPage => PageNumber < TotalPages;
}

/// <summary>
/// 角色数据传输对象
/// </summary>
public record RoleDto(
    string Id, 
    string Name, 
    string Description,
    DateTime CreatedAt,
    DateTime UpdatedAt);