using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Net.NetworkInformation;
using ln.application;
using ln.build.commands;
using ln.build.pipeline;
using ln.build.repositories;
using ln.build.secrets;
using ln.build.semver;
using ln.http;
using ln.http.router;
using ln.json;
using ln.logging;
using ln.templates.html;
using ln.templates.http;
using ln.threading;
using ln.type;
using Microsoft.VisualBasic;

namespace ln.build
{
    public class CIService
    {
        [StaticArgument( LongOption = "context-directory")]
        public string ContextDirectory { get; set; } = AppContext.BaseDirectory;

        [StaticArgument( Option = 'b', LongOption = "base-directory")]
        public string BaseDirectory { get; set; }

        [StaticArgument( Option = 'u', LongOption = "base-url")]
        public string BaseURL { get; set; }

        [StaticArgument( Option = 'h', LongOption = "hostname")]
        public string HostName { get; set; }

        public Pool buildPool;
        public string ReportsDirectory { get; set; }

        Logger webLogger;
        SimpleRouter httpRouter;
        SimpleRouter hookRouter;
        StaticRouter staticsRouter;
        TemplateRouter templateRouter;
        HTTPServer httpServer;

        public StageCommandContainer StageCommands { get; } = new StageCommandContainer(null,null);

        public CIService()
        {
            buildPool = new Pool(2);
        }
        public CIService(string baseDirectory) : this()
        {
            BaseDirectory = baseDirectory;
            ReportsDirectory = Path.Combine(baseDirectory, "builds" );
        }

        public void Initialize()
        {
            BaseDirectory ??= ContextDirectory;

            ReportsDirectory ??= Path.Combine(BaseDirectory, "builds" );
            ReportsDirectory = Path.GetFullPath(ReportsDirectory);

            Logging.Log(LogLevel.INFO, "Commandline: {0}", Environment.CommandLine);
            Logging.Log(LogLevel.INFO, "Working Directory: {0}", Environment.CurrentDirectory);
            Logging.Log(LogLevel.INFO, "Base Directory: {0}", BaseDirectory);
            Logging.Log(LogLevel.INFO, "Reports Directory: {0}", ReportsDirectory);

            Directory.CreateDirectory(ReportsDirectory);
            Directory.CreateDirectory(Path.Combine(BaseDirectory, "secrets"));

            InitializeStageCommands();

            InitializeHttpServer();
        }
        
        private void InitializeHttpServer()
        {
            if (HostName == null)
                HostName = FindHostName();

            if (BaseURL == null)
                BaseURL = string.Format("http://{0}:{1}", HostName, 1888);

            Logging.Log(LogLevel.DEBUG, "Hostname: {0}", HostName);
            Logging.Log(LogLevel.DEBUG, "BaseURL: {0}", BaseURL);

            httpRouter = new SimpleRouter();
            httpRouter.AddSimpleRoute("/builds/*", new StaticRouter(ReportsDirectory));

            hookRouter = new SimpleRouter();
            staticsRouter = new StaticRouter(Path.Combine(ContextDirectory, "html", "static"));
            templateRouter = new TemplateRouter(new FileSystemTemplateSource(Path.Combine(ContextDirectory, "html", "documents"), false));
            templateRouter.DefaultTemplatePath = "index.html";
            templateRouter.OnPrepareRenderContext += (templateRouter, templateDocument, renderContext) => {
                renderContext.SetScriptObject("CIService", this);
            };

            httpRouter.AddSimpleRoute("/hooks/*", hookRouter);
            httpRouter.AddSimpleRoute("/builds/:buildid/*", templateRouter);
            httpRouter.AddSimpleRoute("/builds/:buildid", templateRouter);
            httpRouter.AddSimpleRoute("/*", staticsRouter);

            webLogger = new Logger(Logger.ConsoleLogger);
            webLogger.Backends.Add(new FileLogger("ln.build.http.log"));

            httpServer = new HTTPServer(new LoggingRouter(httpRouter, webLogger));

            foreach (IPAddress _ip in Dns.GetHostAddresses(HostName))
            {
                IPv6 ip6 = _ip;
                httpServer.AddEndpoint(new Endpoint(ip6, 1888));
            }
        }

        public void InitializeStageCommands()
        {
            StageCommands.AddCommand(CoreCommands.ShellCommand, "sh");

            StageCommands.AddCommand(DotNetCommand.Prepare, "dotnet", "prepare" );
            StageCommands.AddCommand(DotNetCommand.Build, "dotnet", "build" );
            StageCommands.AddCommand(DotNetCommand.Test, "dotnet", "test" );
            StageCommands.AddCommand(DotNetCommand.Pack, "dotnet", "pack" );
            StageCommands.AddCommand(DotNetCommand.Push, "dotnet", "push" );
            StageCommands.AddCommand(DotNetCommand.Publish, "dotnet", "publish" );

            StageCommands.AddCommand(DeployCommand.Deploy, "deploy" );
            StageCommands.AddCommand(DeployCommand.Release, "release" );
        }

        public string GetJobURL(CIJob job) => string.Format("{0}/builds/{1}", BaseURL, job.JobID);

        public void Start()
        {
            buildPool.Start();
            httpServer.Start();
        }

        public void AddWebHookHandler(string name, Func<CIService,HttpRequest,HttpResponse> webHookHandler)
        {
            hookRouter.AddSimpleRoute(String.Format("/{0}", name), (HttpRoutingContext context,HttpRequest request) => webHookHandler(this, request));
        }

        public SecretStorage GetSecretStorage(string secretName) => new SecretStorage(Path.Combine(BaseDirectory,"secrets", String.Format("{0}.json", secretName)));


        public void Enqueue(CIJob job)
        {
            buildPool.Enqueue(job);
        }

        public void CreateReport(CIJob job)
        {
            JSONObject report = new JSONObject();
            JSONArray steps = new JSONArray();
            report["steps"] = steps;
            report["state"] = new JSONString(job.BuildState.ToString());

            string reportDirectory = Path.Combine(ReportsDirectory, job.JobID);
            Directory.CreateDirectory(reportDirectory);

            foreach (string logName in job.GetLogStreamNames())
            {
                string logFileName = Path.Combine(reportDirectory, logName);
                using (FileStream fileStream = new FileStream(logFileName, FileMode.CreateNew))
                {
                    job.GetLogStream(logName).Position = 0;
                    job.GetLogStream(logName).CopyTo(fileStream);
                    fileStream.Flush();
                    fileStream.Close();
                }

                steps.Add(new JSONString(logName));
            }

            using (StreamWriter writer = new StreamWriter(Path.Combine(reportDirectory, "build.json")))
                writer.Write(report.ToString());
        }


        public string FindHostName()
        {
            return Dns.GetHostEntry("LocalHost").HostName;
/*            
            string hostName = IPGlobalProperties.GetIPGlobalProperties().HostName;
            string domainName = IPGlobalProperties.GetIPGlobalProperties().DomainName;

            if (!hostName.EndsWith(domainName))
            {
                hostName = string.Format("{0}.{1}", hostName, domainName);
            }
            return hostName;
*/        }

    }
}