using Microsoft.AspNetCore.Antiforgery;
using Microsoft.AspNetCore.Mvc;
using StopShopping.Services.Models.Resp;

namespace StopShopping.Api.Middlewares;

public class GlobalExceptionHandlerMiddleware
{
    public GlobalExceptionHandlerMiddleware(RequestDelegate requestDelegate,
        ILogger<GlobalExceptionHandlerMiddleware> logger,
        IProblemDetailsService problemDetailsService)
    {
        _next = requestDelegate;
        _logger = logger;
        _problemDetailsService = problemDetailsService;
    }

    private readonly RequestDelegate _next;
    private readonly ILogger<GlobalExceptionHandlerMiddleware> _logger;
    private readonly IProblemDetailsService _problemDetailsService;

    public async Task InvokeAsync(HttpContext httpContext)
    {
        try
        {
            await _next(httpContext);
            httpContext.Response.OnStarting(async () =>
            {
                var antiforgeryFeature = httpContext.Features.Get<IAntiforgeryValidationFeature>();
                if (null != antiforgeryFeature && !antiforgeryFeature.IsValid)
                {
                    var problemDetails = new ProblemDetails
                    {
                        Detail = antiforgeryFeature.Error?.Message,
                        Instance = httpContext.Request.Path,
                        Status = StatusCodes.Status400BadRequest,
                        Title = "CSRF 错误",
                    };

                    problemDetails.AddErrorCode(ProblemDetailsCodes.CsrfValidationFailed);

                    httpContext.Response.StatusCode = StatusCodes.Status400BadRequest;
                    httpContext.Response.ContentType = "application/problem+json";

                    await _problemDetailsService.WriteAsync(new ProblemDetailsContext
                    {
                        HttpContext = httpContext,
                        ProblemDetails = problemDetails
                    });
                }

                await Task.CompletedTask;
            });
        }
        catch (BadHttpRequestException ex)
        {
            _logger.LogError(ex, "参数错误");

            var problemDetails = new ProblemDetails
            {
                Detail = ex.Message,
                Instance = httpContext.Request.Path,
                Status = StatusCodes.Status400BadRequest,
                Title = "参数错误",
            };

            problemDetails.AddErrorCode(ProblemDetailsCodes.BadParameters);

            httpContext.Response.StatusCode = StatusCodes.Status400BadRequest;
            httpContext.Response.ContentType = "application/problem+json";

            await _problemDetailsService.WriteAsync(new ProblemDetailsContext
            {
                HttpContext = httpContext,
                ProblemDetails = problemDetails
            });
        }
        catch (ServiceException ex)//业务层抛出提示
        {
            await httpContext.Response.WriteAsJsonAsync(ApiResponse.Failed(ex.Message));
        }
        catch (Exception ex)
        {
            _logger.LogCritical(ex, "意外的异常");

            var problemDetails = new ProblemDetails
            {
                Detail = ex.Message,
                Instance = httpContext.Request.Path,
                Status = StatusCodes.Status500InternalServerError,
                Title = "服务器错误",
            };

            problemDetails.AddErrorCode(ProblemDetailsCodes.ServerError);

            httpContext.Response.StatusCode = StatusCodes.Status500InternalServerError;
            httpContext.Response.ContentType = "application/problem+json";

            await _problemDetailsService.WriteAsync(new ProblemDetailsContext
            {
                HttpContext = httpContext,
                ProblemDetails = problemDetails,
            });
        }
    }
}