using DS.Module.Core.Extensions;
using Microsoft.AspNetCore.Http;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;

namespace DS.Module.UserModule;

public class AspNetUser : IUser
{
    private readonly IHttpContextAccessor _accessor;

    public AspNetUser(IHttpContextAccessor accessor)
    {
        _accessor = accessor;
    }

    public string UserId => GetClaimValueByType("jti") ?? "90001";
    public string UserName => GetClaimValueByType("UserName") ?? "IUser获取UserName意外为空";
    public string TenantId => GetClaimValueByType("TenantId") ?? "90002";
    public string TenantName => GetClaimValueByType("TenantName") ?? "IUser获取TenantName意外为空";
    public long OrgId => GetClaimValueByType("OrgId")?.ObjToLong() ?? 90003;




    public string? GetClaimValueByType(string claimType)
    {
        return Claims.Where(x => x.Type == claimType).Select(x => x.Value).FirstOrDefault();
    }

    private List<Claim>? _claims;
    public List<Claim> Claims
    {
        get
        {
            if (_claims == null || _claims.Count == 0)
            {
                _claims = GetClaimsIdentity().ToList();
            }
            return _claims;
        }
    }

    IEnumerable<Claim> GetClaimsIdentity()
    {
        if (_accessor.HttpContext == null) return ArraySegment<Claim>.Empty;

        if (!IsAuthenticated())
        {
            var token = GetToken();

            var jwtHandler = new JwtSecurityTokenHandler();
            if (token.IsNotEmptyOrNull() && jwtHandler.CanReadToken(token))
            {
                JwtSecurityToken jwtToken = jwtHandler.ReadJwtToken(token);
                return jwtToken.Claims;
            }
        }

        var claims = _accessor.HttpContext.User.Claims.ToList() ?? [];

        // 如果有从Claims中获取HttpHeader的需求，把这里放开
        //var headers = _accessor.HttpContext.Request.Headers;
        //foreach (var header in headers)
        //{
        //    claims.Add(new Claim(header.Key, header.Value));
        //}
        return claims;
    }
    public bool IsAuthenticated()
    {
        return _accessor.HttpContext?.User?.Identity?.IsAuthenticated ?? false;
    }
    public string GetToken()
    {
        var token = _accessor.HttpContext?.Request?.Headers["Authorization"].ObjToString().Replace("Bearer ", "");
        if (!string.IsNullOrWhiteSpace(token))
        {
            return token;
        }
        return "IUser通过GetToken()获取Token意外为空";

        //有需要再返回
        //return _accessor.HttpContext?.Request.Headers["X-Token"].FirstOrDefault()
        //     ?? _accessor.HttpContext?.Request.Query["Token"].FirstOrDefault()
        //     ?? _accessor.HttpContext?.Request.Cookies["Token"]
        //     ?? "东胜软件";
    }
}