using System.Security.Claims;
using Microsoft.AspNetCore.Http;

namespace line_gestao_api.Services;

public class TenantProvider : ITenantProvider
{
    private readonly IHttpContextAccessor _httpContextAccessor;
    private static readonly AsyncLocal<Guid?> CurrentTenant = new();

    public TenantProvider(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
    }

    public Guid? TenantId => CurrentTenant.Value ?? ResolveFromClaims();

    public void SetTenantId(Guid? tenantId)
    {
        CurrentTenant.Value = tenantId;
    }

    private Guid? ResolveFromClaims()
    {
        var claim = _httpContextAccessor.HttpContext?.User?.FindFirst("tenantId")?.Value
            ?? _httpContextAccessor.HttpContext?.User?.FindFirst("tenant")?.Value;

        return Guid.TryParse(claim, out var tenantId) ? tenantId : null;
    }
}