using System;
using System.Configuration;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
using DotNet.Testcontainers.Builders;
using InfluxDB.Client;
using Xunit;

namespace OhmGraphite.Test
{
    public class InfluxTest
    {
        [Fact, Trait("Category", "integration")]
        public async Task CanInsertIntoInflux()
        {
            var testContainersBuilder = new ContainerBuilder()
                .WithDockerEndpoint(DockerUtils.DockerEndpoint())
                .WithImage("influxdb:1.8-alpine")
                .WithEnvironment("INFLUXDB_DB", "mydb")
                .WithEnvironment("INFLUXDB_USER", "my_user")
                .WithEnvironment("INFLUXDB_USER_PASSWORD", "my_pass")
                .WithPortBinding(8086, assignRandomHostPort: true)
                .WithWaitStrategy(Wait.ForUnixContainer().UntilPortIsAvailable(8086));

            await using var container = testContainersBuilder.Build();
            await container.StartAsync();
            var baseUrl = $"http://{container.Hostname}:{container.GetMappedPublicPort(8086)}";
            var config = new InfluxConfig(new Uri(baseUrl), "mydb", "my_user", "my_pass");
            using var writer = new InfluxWriter(config, "my-pc");
            using var client = new HttpClient();
            for (int attempts = 0; ; attempts++)
            {
                try
                {
                    await writer.ReportMetrics(DateTime.Now, TestSensorCreator.Values());

                    var resp = await client.GetAsync(
                        $"{baseUrl}/query?pretty=true&db=mydb&q=SELECT%20*%20FROM%20Temperature");
                    Assert.True(resp.IsSuccessStatusCode);
                    var content = await resp.Content.ReadAsStringAsync();
                    Assert.Contains("/intelcpu/0/temperature/0", content);
                    break;
                }
                catch (Exception)
                {
                    if (attempts >= 10)
                    {
                        throw;
                    }

                    Thread.Sleep(TimeSpan.FromSeconds(1));
                }
            }
        }

        [Fact, Trait("Category", "integration")]
        public async Task CanInsertIntoPasswordLessInfluxdb()
        {
            var testContainersBuilder = new ContainerBuilder()
                .WithDockerEndpoint(DockerUtils.DockerEndpoint())
                .WithImage("influxdb:1.8-alpine")
                .WithEnvironment("INFLUXDB_DB", "mydb")
                .WithEnvironment("INFLUXDB_USER", "my_user")
                .WithEnvironment("INFLUXDB_HTTP_AUTH_ENABLED", "false")
                .WithPortBinding(8086, assignRandomHostPort: true)
                .WithWaitStrategy(Wait.ForUnixContainer().UntilPortIsAvailable(8086));

            await using var container = testContainersBuilder.Build();
            await container.StartAsync();
            var baseUrl = $"http://{container.Hostname}:{container.GetMappedPublicPort(8086)}";
            var config = new InfluxConfig(new Uri(baseUrl), "mydb", "my_user", null);
            using var writer = new InfluxWriter(config, "my-pc");
            using var client = new HttpClient();
            for (int attempts = 0; ; attempts++)
            {
                try
                {
                    await writer.ReportMetrics(DateTime.Now, TestSensorCreator.Values());

                    var resp = await client.GetAsync(
                        $"{baseUrl}/query?pretty=true&db=mydb&q=SELECT%20*%20FROM%20Temperature");
                    Assert.True(resp.IsSuccessStatusCode);
                    var content = await resp.Content.ReadAsStringAsync();
                    Assert.Contains("/intelcpu/0/temperature/0", content);
                    break;
                }
                catch (Exception)
                {
                    if (attempts >= 10)
                    {
                        throw;
                    }

                    Thread.Sleep(TimeSpan.FromSeconds(1));
                }
            }
        }

        [Fact, Trait("Category", "integration")]
        public async Task CanInsertIntoInflux2()
        {
            var testContainersBuilder = new ContainerBuilder()
                .WithDockerEndpoint(DockerUtils.DockerEndpoint())
                .WithImage("influxdb:2.0-alpine")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_MODE", "setup")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_USERNAME", "my-user")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_PASSWORD", "my-password")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_BUCKET", "mydb")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_ORG", "myorg")
                .WithPortBinding(8086, assignRandomHostPort: true)
                .WithWaitStrategy(Wait.ForUnixContainer().UntilPortIsAvailable(8086));

            await using var container = testContainersBuilder.Build();
            await container.StartAsync();
            var baseUrl = $"http://{container.Hostname}:{container.GetMappedPublicPort(8086)}";
            var options = new InfluxDBClientOptions.Builder()
                .Url(baseUrl)
                .Authenticate("my-user", "my-password".ToCharArray())
                .Bucket("mydb")
                .Org("myorg")
                .Build();

            var config = new Influx2Config(options);

            using var writer = new Influx2Writer(config, "my-pc");
            for (int attempts = 0; ; attempts++)
            {
                try
                {
                    await writer.ReportMetrics(DateTime.Now, TestSensorCreator.Values());
                    var influxDBClient = new InfluxDBClient(options);
                    var flux = "from(bucket:\"mydb\") |> range(start: -1h)";
                    var queryApi = influxDBClient.GetQueryApi();
                    var tables = await queryApi.QueryAsync(flux, "myorg");
                    var fields = tables.SelectMany(x => x.Records).Select(x => x.GetValueByKey("identifier"));
                    Assert.Contains("/intelcpu/0/temperature/0", fields);
                    break;
                }
                catch (Exception)
                {
                    if (attempts >= 10)
                    {
                        throw;
                    }

                    Thread.Sleep(TimeSpan.FromSeconds(1));
                }
            }
        }

        [Fact, Trait("Category", "integration")]
        public async Task CanInsertIntoInflux2Token()
        {
            var testContainersBuilder = new ContainerBuilder()
                .WithDockerEndpoint(DockerUtils.DockerEndpoint())
                .WithImage("influxdb:2.0-alpine")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_MODE", "setup")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_USERNAME", "my-user")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_PASSWORD", "my-password")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_BUCKET", "mydb")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_ORG", "myorg")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_ADMIN_TOKEN", "thisistheinfluxdbtoken")
                .WithPortBinding(8086, assignRandomHostPort: true)
                .WithWaitStrategy(Wait.ForUnixContainer().UntilPortIsAvailable(8086));

            await using var container = testContainersBuilder.Build();
            await container.StartAsync();

            var baseUrl = $"http://{container.Hostname}:{container.GetMappedPublicPort(8086)}";
            var configMap = new ExeConfigurationFileMap { ExeConfigFilename = "assets/influx2.config" };
            var config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None);
            config.AppSettings.Settings["influx2_address"].Value = baseUrl;
            var customConfig = new CustomConfig(config);
            var results = MetricConfig.ParseAppSettings(customConfig);

            using var writer = new Influx2Writer(results.Influx2, "my-pc");
            for (int attempts = 0; ; attempts++)
            {
                try
                {
                    await writer.ReportMetrics(DateTime.Now, TestSensorCreator.Values());
                    var influxDBClient = new InfluxDBClient(results.Influx2.Options);
                    var flux = "from(bucket:\"mydb\") |> range(start: -1h)";
                    var queryApi = influxDBClient.GetQueryApi();
                    var tables = await queryApi.QueryAsync(flux, "myorg");
                    var fields = tables.SelectMany(x => x.Records).Select(x => x.GetValueByKey("identifier"));
                    Assert.Contains("/intelcpu/0/temperature/0", fields);
                    break;
                }
                catch (Exception)
                {
                    if (attempts >= 10)
                    {
                        throw;
                    }

                    Thread.Sleep(TimeSpan.FromSeconds(1));
                }
            }
        }

        [Fact, Trait("Category", "integration")]
        public async Task CanInsertIntoInflux2TokenTls()
        {
            // We do some fancy docker footwork where we informally connect
            // these two containers. In the future I believe test containers will
            // be able to natively handle adding these to a docker network
            var testContainersBuilder = new ContainerBuilder()
                .WithDockerEndpoint(DockerUtils.DockerEndpoint())
                .WithImage("influxdb:2.0-alpine")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_MODE", "setup")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_USERNAME", "my-user")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_PASSWORD", "my-password")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_BUCKET", "mydb")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_ORG", "myorg")
                .WithEnvironment("DOCKER_INFLUXDB_INIT_ADMIN_TOKEN", "thisistheinfluxdbtoken")
                .WithPortBinding(8086, assignRandomHostPort: true)
                .WithWaitStrategy(Wait.ForUnixContainer().UntilPortIsAvailable(8086));

            await using var container = testContainersBuilder.Build();
            await container.StartAsync();

            var cmd = $"apk add openssl && openssl req -x509 -nodes -newkey rsa:4096 -keyout /tmp/key.pem -out /tmp/cert.pem -days 365 -subj '/C=US/ST=Oregon/L=Portland/O=Company Name/OU=Org/CN=www.example.com' && /usr/bin/ghostunnel server --listen=0.0.0.0:8087 --target={container.IpAddress}:8086 --unsafe-target --disable-authentication --key /tmp/key.pem --cert=/tmp/cert.pem";
            var tlsContainerBuilder = new ContainerBuilder()
                .WithDockerEndpoint(DockerUtils.DockerEndpoint())
                .WithImage("squareup/ghostunnel")
                .WithExposedPort(8087)
                .WithPortBinding(8087, assignRandomHostPort: true)
                .WithWaitStrategy(Wait.ForUnixContainer().UntilPortIsAvailable(8087))
                .WithEntrypoint("/bin/sh")
                .WithCommand("-c", cmd);

            await using var tlsContainer = tlsContainerBuilder.Build();
            await tlsContainer.StartAsync();

            var baseUrl = $"https://{tlsContainer.Hostname}:{tlsContainer.GetMappedPublicPort(8087)}";
            var configMap = new ExeConfigurationFileMap { ExeConfigFilename = "assets/influx2-ssl.config" };
            var config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None);
            config.AppSettings.Settings["influx2_address"].Value = baseUrl;
            var customConfig = new CustomConfig(config);
            var results = MetricConfig.ParseAppSettings(customConfig);

            try
            {
                using var writer = new Influx2Writer(results.Influx2, "my-pc");
                for (int attempts = 0; ; attempts++)
                {
                    try
                    {
                        await writer.ReportMetrics(DateTime.Now, TestSensorCreator.Values());
                        var influxDbClient = new InfluxDBClient(results.Influx2.Options);
                        var flux = "from(bucket:\"mydb\") |> range(start: -1h)";
                        var queryApi = influxDbClient.GetQueryApi();
                        var tables = await queryApi.QueryAsync(flux, "myorg");
                        var fields = tables.SelectMany(x => x.Records).Select(x => x.GetValueByKey("identifier"));
                        Assert.Contains("/intelcpu/0/temperature/0", fields);
                        break;
                    }
                    catch (Exception)
                    {
                        if (attempts >= 10)
                        {
                            throw;
                        }

                        Thread.Sleep(TimeSpan.FromSeconds(1));
                    }
                }
            }
            finally
            {
                ServicePointManager.ServerCertificateValidationCallback = null;
            }
        }
    }
}