using GPW.CORE.Api.Data;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.AspNetCore.Mvc;
using NLog;
using System.Text;

namespace GPW.CORE.Api.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ProjCheckController : ControllerBase
    {
        #region Private Fields

        private static NLog.Logger Log = LogManager.GetCurrentClassLogger();

        private readonly IEmailSender _emailSender;

        private IConfiguration _configuration;

        #endregion Private Fields

        #region Public Constructors

        /// <summary>
        /// Avvio controller x CheckProgetti
        /// </summary>
        /// <param name="logger"></param>
        /// <param name="configuration"></param>
        /// <param name="emailSender"></param>
        /// <param name="DataService"></param>
        public ProjCheckController(ILogger<ProjCheckController> logger, IConfiguration configuration, IEmailSender emailSender, ApiDataService DataService)
        {
            _configuration = configuration;
            _emailSender = emailSender;
            dataService = DataService;
            Log.Info("Avviata classe ProjCheck");
        }

        #endregion Public Constructors

        #region Protected Enums

        protected enum logType
        {
            none,
            local,
            trace,
            info,
            warn
        }

        #endregion Protected Enums

        #region Protected Properties

        /// <summary>
        /// Dataservice x accesso DB
        /// </summary>
        protected ApiDataService dataService { get; set; }

        #endregion Protected Properties

        #region Protected Methods

        /// <summary>
        /// Effettua log del tipo richiesto aggiungendo riga anche allo stringbuilder indicato
        /// </summary>
        /// <param name="message"></param>
        /// <param name="tipoLog"></param>
        /// <param name="currSB"></param>
        protected void doLog(string message, logType tipoLog, ref StringBuilder currSB)
        {
            bool doLine = true;
            switch (tipoLog)
            {
                case logType.info:
                    Log.Info(message);
                    break;

                case logType.trace:
                    Log.Trace(message);
                    break;

                case logType.warn:
                    Log.Warn(message);
                    break;

                case logType.local:
                    break;

                default:
                case logType.none:
                    doLine = false;
                    break;
            }
            if (doLine)
            {
                currSB.AppendLine(message);
            }
            else
            {
                currSB.Append(message);
            }
        }

        protected async Task sendEmail(string subject, string message)
        {
            string emailRaw = _configuration["MailDest:ProjCheck"] ?? "";
            List<string> emailDestList = emailRaw.Split(",").ToList();
            foreach (var dest in emailDestList)
            {
                try
                {
                    await _emailSender.SendEmailAsync(dest, subject, message);
                }
                catch (Exception exc)
                {
                    Log.Error($"Eccezione durante invio email:{Environment.NewLine}dest: {dest} | subject {subject}{Environment.NewLine}{exc}");
                }
            }
        }

        #endregion Protected Methods

        #region Public Methods

        [HttpGet("ResAlloc")]
        public async Task<string> Get()
        {
            // oggetti base
            string answ = "ND";
            StringBuilder sbMain = new StringBuilder();
            StringBuilder sbActions = new StringBuilder();
            StringBuilder sbAllProj = new StringBuilder();
            int numFix = 0;
            int numProj = 0;
            int numFasi = 0;
            string enableChiudiRaw = _configuration["EnableChiudiFasi"]??"false";
            bool enableChiudi = false;
            if (!string.IsNullOrEmpty(enableChiudiRaw))
            {
                bool.TryParse(enableChiudiRaw, out enableChiudi);
            }

            // recupero progetti attivi...
            doLog("Esito della verifica stato ore progetto (allocate/consumate)", logType.info, ref sbMain);
            doLog("<div style=\"font-size: 1.3em; color: #00AACC;\">", logType.none, ref sbMain);
            var currProj = await dataService.AnagProjActiv();
            numProj = currProj.Count;
            doLog($"Progetti Attivi: <b>{numProj}</b>", logType.info, ref sbMain);
            doLog("</div>", logType.none, ref sbMain);

            // leggo fasi attive
            var currFasiAct = await dataService.AnagFasiActiv();
            numFasi = currFasiAct.Count;
            doLog("<div style=\"font-size: 1.2em; color: #22BB22;\">", logType.none, ref sbMain);
            doLog($"Fasi Attive: <b>{numFasi}</b>", logType.info, ref sbMain);
            doLog("</div>", logType.none, ref sbMain);

            // ciclo elenco fasi ancestor di ognuno...
            doLog("<b>Elenco Progetti valutati</b><br/>", logType.none, ref sbAllProj);
            foreach (var itemProj in currProj)
            {
                // cerco le sue fasi PARENT...
                var subsetFasi = currFasiAct
                                    .Where(x => x.IdxProgetto == itemProj.IdxProgetto && x.IdxFaseAncest == 0)
                                    .ToList();
                string projData = $"[P.{itemProj.IdxProgetto}] {itemProj.Gruppo} | {itemProj.ClienteNav.RagSociale} | {itemProj.NomeProj} | {subsetFasi.Count} Fasi";
                doLog(projData, logType.trace, ref sbAllProj);

                // ciclo x ogni fase Parent
                foreach (var parentFase in subsetFasi)
                {
                    // se ne trovo valuto le ore impiegate...
                    var statoFase = await dataService.CalcOreFase(parentFase.IdxFase, false);

                    // se ore usate > (ore budget x %) --> CHIUDO!
                    if (statoFase != null && statoFase.totOre >= (statoFase.budgetTime * (decimal)statoFase.percOpen))
                    {
                        // segno che ho +1 fix
                        numFix++;
                        // x ora LOG... poi chiudo...
                        string currAction = $" [F.{parentFase.IdxFase}] Budget esaurito in Fase {parentFase.NomeFase} {statoFase.totOre:N2}h consumate, budgt {statoFase.budgetTime:N0} al {statoFase.percOpen:P1}";

                        doLog(projData, logType.local, ref sbActions);
                        doLog(currAction, logType.warn, ref sbActions);
                        doLog("------------------", logType.local, ref sbActions);

                        // se abilitato CHIUDO fase master e sottofasi!
                        if (enableChiudi)
                        {
                            await dataService.FasiSetActive(parentFase.IdxFase, false);
                        }
                    }
                }
            }
            if (numFix > 0)
            {
                doLog("<hr/>", logType.none, ref sbMain);
                doLog("<div style=\"font-size: 1.1em;\">", logType.none, ref sbMain);
                doLog($"Fasi critiche: <b>{numFix}</b>", logType.info, ref sbMain);
                doLog("</div>", logType.none, ref sbMain);
            }
            else
            {
                doLog("<hr/>", logType.none, ref sbMain);
                doLog("<div style=\"font-size: 1.1em;\">", logType.none, ref sbMain);
                doLog($"Tutti i progetti sono <b>OK</b>", logType.info, ref sbMain);
                doLog("</div>", logType.none, ref sbMain);
            }

            // predispongo email
            string msgTopic = "GPW: effettuata verifica progetti";

            string msgBody = sbMain.ToString();
            // se ho errori loggo...
            if (numFix > 0)
            {
                msgBody += sbActions.ToString();
            }
            msgBody += "<br/>";
            msgBody += "<hr/>";
            msgBody += "<br/>";
            msgBody += sbAllProj.ToString();
            //{ HtmlEncoder.Default.Encode(callbackUrl)}

            // invio email
            await sendEmail(msgTopic, msgBody.Replace($"{Environment.NewLine}", "<br/>"));

            // ritorno solo LOG  azioni
            answ = numFix == 0 ? $"ALL {numProj} Proj OK" : $"Proj: {numProj} | Fasi: {numFasi} | Fixed/Closed: {numFix}";
            return answ;
        }

        #endregion Public Methods
    }
}