using System;
using System.Net.Http;
using System.Text;
using ln.http;
using ln.json;
using ln.logging;

namespace ln.build.repositories
{

    public class GiteaRepositoryInterface : GitRepositoryInterface
    {
        public string BaseURL { get; }

        public string AuthorizationToken { get; set; }

        public GiteaRepositoryInterface(string baseURL) :base("gitea")
        {
            BaseURL = baseURL;
        }

        HttpClient CreateHttpClient()
        {
            HttpClient httpClient = new HttpClient();
            httpClient.DefaultRequestHeaders.Add("Authorization",String.Format("token {0}", AuthorizationToken));
            return httpClient;
        }

        public override bool DetectValidity(string cloneUrl) => cloneUrl.StartsWith(BaseURL);
        public override void UpdateBuildState(CIJob job)
        {
            string buildStateURL = string.Format("{3}/api/v1/repos/{0}/{1}/statuses/{2}",
                job.GetVariable("REPO_OWNER"),
                job.GetVariable("REPO_NAME"),
                job.GetVariable("COMMIT_ID"),
                BaseURL
                );

            if (buildStateURL != null)
            {
                JSONObject stateObject = new JSONObject();
                stateObject.Add("context", string.Format("ln.build - {0}", job.CIService.HostName));
                stateObject.Add("description", "build job pending");
                stateObject.Add("state", job.BuildState.ToString().ToLower());
                stateObject.Add("target_url", job.CIService.GetJobURL(job));

                using (HttpClient httpClient = CreateHttpClient())
                {
                    HttpResponseMessage response = httpClient.PostAsync(buildStateURL, new StringContent(stateObject.ToString(),Encoding.UTF8,"application/json")).Result;
                    job.Logger.Log(LogLevel.DEBUG, "UpdateBuildState({0}): {1}", job.BuildState, buildStateURL);
                    job.Logger.Log(LogLevel.DEBUG, "Request: {0}", stateObject.ToString());
                    job.Logger.Log(LogLevel.DEBUG, "Response: {0}", response );
                }
            }        
        }

        public override HttpResponse WebHookHandler(CIService ciService, HttpRequest request)
        {
            HttpResponse response = new HttpResponse(request);

            if (!request.Method.Equals("POST"))
            {
                response.StatusCode = 405;
            } else if (!request.GetRequestHeader("content-type").Equals("application/json"))
            {
                response.StatusCode = 415;
                response.ContentWriter.WriteLine("Unsupported Media Type, should be application/json");
            } else {
                JSONValue jsonRequest = JSONParser.Parse(request.ContentReader.ReadToEnd());
                if (jsonRequest is JSONObject message)
                {
                    try
                    {
                        string cloneUrl = message["repository"]["clone_url"].ToNative().ToString();

                        foreach (JSONValue commit in (message["commits"] as JSONArray).Children)
                        {
                            string commitID = commit["id"].ToNative().ToString();
                            Logging.Log("Received CI request of repository {0} for commit {1}", cloneUrl, commitID);

                            CIJob job = new CIJob(ciService, this, cloneUrl)
                                .SetVariable("REPO_OWNER", message["repository"]["owner"]["username"].ToNative().ToString())
                                .SetVariable("REPO_NAME", message["repository"]["name"].ToNative().ToString())
                                .SetVariable("COMMIT_ID", commitID)
                                .SetVariable("NOTIFY", message["pusher"]["email"].ToNative().ToString())
                                .SetVariable("NUGET_APIKEY", "3yAJPMxcaEhb_HP62dxK")
                                .SetVariable("NUGET_SOURCE", "http://nuget.l--n.de/nuget/l--n/v3/index.json")
                                ;

                            using (HttpClient httpClient = CreateHttpClient())
                            {
                                string triggerFile = string.Format("{3}/api/v1/repos/{0}/{1}/contents/build.ln?ref={2}",
                                                            job.GetVariable("REPO_OWNER"),
                                                            job.GetVariable("REPO_NAME"),
                                                            job.GetVariable("COMMIT_ID"),
                                                            BaseURL
                                                            );

                                HttpResponseMessage triggerResponse = httpClient.GetAsync(triggerFile).Result;
                                if (triggerResponse.StatusCode == System.Net.HttpStatusCode.OK)
                                {
                                    job.UpdateBuildState(BuildState.PENDING);
                                    ciService.Enqueue(job);
                                }
                            }
                        }
                    } catch (Exception e)
                    {
                        response.StatusCode = 500;
                        response.StatusMessage = "An exception occured";
                        response.ContentWriter.WriteLine("{0}", e.ToString());
                        Logging.Log(e);
                    }

                } else {
                    response.StatusCode = 400;
                }

            }


            return response;

        }
    }

}