using JNPF.Authorization;
using JNPF.Common.Const;
using JNPF.Common.Enums;
using JNPF.DataEncryption;
using Microsoft.AspNetCore.Authorization;

namespace JNPF.API.Entry.Handlers;

/// <summary>
/// jwt处理程序.
/// </summary>
public class JwtHandler : AppAuthorizeHandler
{
    /// <summary>
    /// 重写 Handler 添加自动刷新.
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public override async Task HandleAsync(AuthorizationHandlerContext context)
    {
        // 自动刷新Token
        if (JWTEncryption.AutoRefreshToken(context, context.GetCurrentHttpContext(),
            App.GetOptions<JWTSettingsOptions>().ExpiredTime))
        {
            await AuthorizeHandleAsync(context);
        }
        else
        {
            context.Fail(); // 授权失败
            DefaultHttpContext currentHttpContext = context.GetCurrentHttpContext();
            if (currentHttpContext == null)
                return;
            currentHttpContext.SignoutToSwagger();
        }
    }

    /// <summary>
    /// 授权判断逻辑，授权通过返回 true，否则返回 false.
    /// </summary>
    /// <param name="context"></param>
    /// <param name="httpContext"></param>
    /// <returns></returns>
    public override async Task<bool> PipelineAsync(AuthorizationHandlerContext context, DefaultHttpContext httpContext)
    {
        // 此处已经自动验证 Jwt Token的有效性了，无需手动验证
        return await CheckAuthorzieAsync(httpContext);
    }

    /// <summary>
    /// 检查权限.
    /// </summary>
    /// <param name="httpContext"></param>
    /// <returns></returns>
    private static async Task<bool> CheckAuthorzieAsync(DefaultHttpContext httpContext)
    {
        // 管理员跳过判断
        if (App.User.FindFirst(ClaimConst.CLAINMADMINISTRATOR)?.Value == ((int)AccountType.Administrator).ToString())
            return true;

        // 路由名称
        if (httpContext.Request.Path.Value == null) return false;
        var routeName = httpContext.Request.Path.Value[1..].Replace("/", ":");
        if (httpContext.Request.Path.StartsWithSegments("/api"))
            routeName = httpContext.Request.Path.Value[5..].Replace("/", ":");

        // 默认路由(获取登录用户信息)
        var defalutRoute = new List<string>()
        {
            "oauth:CurrentUser"
        };

        if (defalutRoute.Contains(routeName)) return true;

        // 获取用户权限集合（按钮或API接口）
        //var permissionList = await App.GetService<ISysMenuService>().GetLoginPermissionList(userManager.UserId);

        // 检查授权
        //return permissionList.Contains(routeName);
        await Task.CompletedTask;
        return true;
    }
}