using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using MediatR;
using CellularManagement.Application.Features.Permissions.Commands.CreatePermission;
using CellularManagement.Application.Common;
using Microsoft.Extensions.Logging;
using Microsoft.AspNetCore.Http;
using CellularManagement.Presentation.Abstractions;
using CellularManagement.Domain.Common;

namespace CellularManagement.Presentation.Controllers;

/// <summary>
/// 权限管理控制器
/// 提供权限管理相关的 API 接口，包括创建、删除和查询权限功能
/// </summary>
[Route("api/permissions")]
[ApiController]
[Authorize(Roles = "Admin")] // 只有管理员可以访问
public class PermissionsController : ApiController
{
    private readonly ILogger<PermissionsController> _logger;

    /// <summary>
    /// 初始化权限控制器
    /// </summary>
    /// <param name="mediator">MediatR 中介者，用于处理命令和查询</param>
    /// <param name="logger">日志记录器</param>
    public PermissionsController(
        IMediator mediator,
        ILogger<PermissionsController> logger) : base(mediator)
    {
        _logger = logger;
    }

    /// <summary>
    /// 创建新权限
    /// </summary>
    /// <remarks>
    /// 示例请求:
    ///
    ///     POST /api/permissions/create
    ///     {
    ///        "name": "CreateUser",
    ///        "description": "创建用户的权限"
    ///     }
    ///
    /// </remarks>
    /// <param name="command">创建权限命令，包含权限名称和描述</param>
    /// <returns>
    /// 创建结果，包含：
    /// - 成功：返回权限ID
    /// - 失败：返回错误信息
    /// </returns>
    /// <response code="200">创建成功，返回权限ID</response>
    /// <response code="400">创建失败，返回错误信息</response>
    [HttpPost]
    [ProducesResponseType(typeof(OperationResult<CreatePermissionResponse>), StatusCodes.Status200OK)]
    [ProducesResponseType(typeof(OperationResult<CreatePermissionResponse>), StatusCodes.Status400BadRequest)]
    public async Task<ActionResult<OperationResult<CreatePermissionResponse>>> CreatePermission([FromBody] CreatePermissionCommand command)
    {
        try
        {
            var result = await mediator.Send(command);

            if (result.IsSuccess)
            {
                _logger.LogInformation("权限 {PermissionName} 创建成功", command.Name);
            }
            else
            {
                _logger.LogWarning("权限 {PermissionName} 创建失败: {Error}", 
                    command.Name, 
                    result.ErrorMessages?.FirstOrDefault());
            }

            return Ok(result);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "创建权限 {PermissionName} 时发生异常", command.Name);
            return StatusCode(StatusCodes.Status500InternalServerError,
                OperationResult<CreatePermissionResponse>.CreateFailure("系统错误，请稍后重试"));
        }
    }
}