using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Driver.Historian.Gateway;
using ZB.MOM.WW.OtOpcUa.Driver.Historian.Gateway.Recorder;
using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
using ZB.MOM.WW.OtOpcUa.Driver.Historian.SqlServer;
using ZB.MOM.WW.OtOpcUa.Host.Configuration;
using ZB.MOM.WW.OtOpcUa.Runtime.Historian;

namespace ZB.MOM.WW.OtOpcUa.Host.Tests.Configuration;

public sealed class HistorianBackendRegistryTests
{
    private static readonly IConfiguration Cfg = new ConfigurationBuilder().Build();

    private static ServerHistorianOptions Gateway(string backend = "Gateway") => new()
    {
        Backend = backend, Enabled = true, Endpoint = "http://localhost:5222", ApiKey = "histgw_id_secret", UseTls = false,
    };

    [Fact]
    public void Default_backend_is_Gateway_and_resolves_the_gateway_provider()
    {
        new ServerHistorianOptions().Backend.ShouldBe("Gateway");
        HistorianBackendRegistry.Resolve(new ServerHistorianOptions(), Cfg).ShouldBeOfType<GatewayHistorianProvider>();
    }

    [Theory]
    [InlineData("gateway")]
    [InlineData("GATEWAY")]
    [InlineData("Gateway")]
    public void Resolve_is_case_insensitive(string name) =>
        HistorianBackendRegistry.Resolve(Gateway(name), Cfg).Name.ShouldBe("Gateway");

    [Fact]
    public void Unknown_backend_throws_naming_the_value_and_the_allowed_names()
    {
        var ex = Should.Throw<OptionsValidationException>(
            () => HistorianBackendRegistry.Resolve(Gateway("Nope"), Cfg));
        var msg = string.Join(" ", ex.Failures);
        msg.ShouldContain("Nope");
        msg.ShouldContain("Gateway");
        msg.ShouldContain("ServerHistorian:Backend");
    }

    [Fact]
    public void KnownBackends_lists_Gateway() => HistorianBackendRegistry.KnownBackends.ShouldContain("Gateway");

    [Fact]
    public void Gateway_provider_builds_the_same_concrete_seams_Program_used_to_build()
    {
        var sp = new ServiceCollection().BuildServiceProvider();
        var p = HistorianBackendRegistry.Resolve(Gateway(), Cfg);

        p.CreateDataSource(sp).ShouldBeOfType<GatewayHistorianDataSource>();
        p.CreateValueWriter(sp).ShouldBeOfType<GatewayHistorianValueWriter>();
        p.CreateAlarmWriter(sp).ShouldBeOfType<GatewayAlarmHistorianWriter>();
        p.CreateProvisioning(sp).ShouldBeOfType<GatewayTagProvisioner>();
        p.CreateUpdater(sp).ShouldBeNull();
    }

    private static IConfiguration SqlCfg() => new ConfigurationBuilder().AddInMemoryCollection(new Dictionary<string, string?>
    {
        ["ServerHistorian:SqlServer:ConnectionString"] = "Server=localhost;User Id=sa;Password=x;TrustServerCertificate=True",
    }).Build();

    [Fact]
    public void SqlServer_backend_resolves_and_builds_the_sql_seams()
    {
        var sp = new ServiceCollection().BuildServiceProvider();
        var p = HistorianBackendRegistry.Resolve(new ServerHistorianOptions { Backend = "sqlserver", Enabled = true }, SqlCfg());

        p.ShouldBeOfType<SqlServerHistorianProvider>();
        HistorianBackendRegistry.KnownBackends.ShouldContain("SqlServer");
        p.SupportedKinds.Count.ShouldBe(6);
        p.SupportedKinds.ShouldContain(HistorianValueKind.String);
        p.SupportedKinds.ShouldContain(HistorianValueKind.Empty);
        p.CreateDataSource(sp).ShouldBeOfType<SqlServerHistorianDataSource>();
        p.CreateValueWriter(sp).GetType().Name.ShouldBe("SqlServerHistorianValueWriter");
        p.CreateAlarmWriter(sp).GetType().Name.ShouldBe("SqlServerAlarmHistorianWriter");
        p.CreateProvisioning(sp).GetType().Name.ShouldBe("SqlServerTagProvisioner");
        var holder = new HistorianUpdaterHolder(p.CreateUpdater(sp));
        holder.Updater.ShouldNotBeNull();
        holder.Updater!.GetType().Name.ShouldBe("SqlServerHistorianDataUpdater");
    }
}