using line_gestao_api.Data;
using line_gestao_api.Models;
using line_gestao_api.Services;
using Microsoft.EntityFrameworkCore;
using Xunit;

namespace line_gestao_api.Tests
{
    public class GeralDashboardInsightsServiceTests
    {
        [Fact]
        public async Task GetInsightsAsync_ReturnsZerosWhenNoLines()
        {
            var tenantId = Guid.NewGuid();
            var provider = new TestTenantProvider(tenantId);
            var db = BuildContext(provider);

            var service = new GeralDashboardInsightsService(db);
            var result = await service.GetInsightsAsync();

            Assert.NotNull(result);
            Assert.Equal(0, result.Kpis.TotalLinhas);
            Assert.Equal(0, result.Kpis.Vivo.QtdLinhas);
            Assert.NotNull(result.Charts.LinhasPorFranquia);
            Assert.NotNull(result.ClientGroups);
        }

        [Fact]
        public async Task GetInsightsAsync_RespectsTenantIsolation()
        {
            var tenantA = Guid.NewGuid();
            var tenantB = Guid.NewGuid();
            var provider = new TestTenantProvider(tenantA);
            var db = BuildContext(provider);

            db.MobileLines.AddRange(
                new MobileLine
                {
                    TenantId = tenantA,
                    Cliente = "Cliente A",
                    Status = "Ativo",
                    ValorPlanoVivo = 100m,
                    GestaoVozDados = 10m
                },
                new MobileLine
                {
                    TenantId = tenantB,
                    Cliente = "Cliente B",
                    Status = "Ativo",
                    ValorPlanoVivo = 200m,
                    GestaoVozDados = 20m
                });

            await db.SaveChangesAsync();

            var service = new GeralDashboardInsightsService(db);
            var result = await service.GetInsightsAsync();

            Assert.Equal(1, result.Kpis.TotalLinhas);
            Assert.Equal(1, result.Kpis.Vivo.QtdLinhas);
            Assert.Equal("Cliente A", result.ClientGroups.Single().Cliente);
        }

        [Fact]
        public async Task GetInsightsAsync_ReturnsNonNullCollections()
        {
            var tenantId = Guid.NewGuid();
            var provider = new TestTenantProvider(tenantId);
            var db = BuildContext(provider);

            db.MobileLines.Add(new MobileLine
            {
                TenantId = tenantId,
                Cliente = "Cliente X",
                Status = "Ativo",
                ValorPlanoVivo = 120m,
                Skeelo = 5m,
                VivoTravelMundo = 0m
            });

            await db.SaveChangesAsync();

            var service = new GeralDashboardInsightsService(db);
            var result = await service.GetInsightsAsync();

            Assert.NotNull(result.Kpis.Adicionais.ServicesPaid);
            Assert.NotNull(result.Kpis.Adicionais.ServicesNotPaid);
            Assert.NotEmpty(result.ClientGroups);
            Assert.NotEmpty(result.Charts.AdicionaisPagosPorServico.Labels);
        }

        private static AppDbContext BuildContext(TestTenantProvider provider)
        {
            var options = new DbContextOptionsBuilder<AppDbContext>()
                .UseInMemoryDatabase(Guid.NewGuid().ToString())
                .Options;

            return new AppDbContext(options, provider);
        }

        private sealed class TestTenantProvider : ITenantProvider
        {
            public TestTenantProvider(Guid tenantId)
            {
                TenantId = tenantId;
            }

            public Guid? TenantId { get; private set; }

            public void SetTenantId(Guid? tenantId)
            {
                TenantId = tenantId;
            }
        }
    }
}