using EnvelopeGenerator.Common;
using EnvelopeGenerator.Web.Services;
using Microsoft.Extensions.Primitives;
using NLog;

namespace EnvelopeGenerator.Web.Handler
{
    public class HistoryHandler
    {
        private DatabaseService database;
        private LoggingService logging;
        private ApiService api;

        public HistoryHandler(DatabaseService database, LoggingService logging, ApiService api)
        {
            this.database = database;
            this.logging = logging;
            this.api = api;
        }

        public IResult HandlePostHistoryEntry(HttpContext ctx)
        {
            try
            {
                //


                // Load Envelope from EnvelopeKey
                string envelopeKey = api.EnsureValidEnvelopeKey(ctx.Request);
                EnvelopeResponse r = database.LoadEnvelope(envelopeKey);
                var receiver = r.Envelope.Receivers.Where(receiver => receiver.Id == r.ReceiverId).SingleOrDefault();

                EnvelopeHistoryEntry historyEntry = new()
                {
                    EnvelopeId = r.Envelope.Id,
                    UserReference = receiver.Email
                };

                database.InsertHistoryEntry(historyEntry);

                return Results.Ok();
            }
            catch (Exception)
            {

                return Results.Problem();
            } 
        }

        private int EnsureValidHistoryEntry(Logger logger, HttpRequest request)
        {
            if (request.Query.TryGetValue("index", out StringValues documentIndexString))
            {
                try
                {
                    return int.Parse(documentIndexString.First());
                }
                catch (Exception e)
                {
                    throw new ArgumentNullException("DocumentIndex", e);
                }
            }
            else
            {
                throw new ArgumentNullException("DocumentIndex");
            }
        }
    }
}