using EgwMultiEngineManager;
using Lux.Data;
using Lux.Data.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System.Diagnostics;

namespace Lux.API.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class WindowController : ControllerBase
    {
        #region Public Constructors

        public WindowController(IConfiguration config, ILogger<WindowController> logger, ImageCacheService imgServ, ExecProcessManager? EgwProcManager = null)
        {
            _logger = logger;
            _config = config;
            // verifico se usare engine
            enableEgwEng = _config.GetValue<bool>("ServerConf:EgwEngineEnab");
            if (enableEgwEng && EgwProcManager != null)
            {
                ProcessMan = EgwProcManager;
                ProcessMan.m_AnswerReceived += ProcessMan_m_AnswerReceived;
            }
            ImgService = imgServ;
        }

        #endregion Public Constructors

        #region Public Methods

        /// <summary>
        /// Chiamata POST: riceve Json in formato JWD serializzato, lo ripete come risposta
        /// PUT: api/calc/svg/00000000-0000-0000-0000-000000000000
        /// </summary>
        /// <param name="id">id oggetto</param>
        /// <returns></returns>
        [HttpPost("calc/{id}")]
        public async Task<ActionResult<string>> calc(string id, [FromBody] string currJwd)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            lastSvg = "";
            string svgContent = "";
            // ...se ricevo percorso --> leggo jwd/svg cablato
            if (!string.IsNullOrEmpty(currJwd))
            {
                if (enableEgwEng && ProcessMan != null)
                {
                    Dictionary<string, string> DictExec = new Dictionary<string, string>();
                    DictExec.Add("Mode", "1");
                    DictExec.Add("Jwd", currJwd);
                    int nId = 1;
                    ProcessArgs currArgs = new ProcessArgs(nId, DictExec);
                    bool done = ProcessMan.ArgumentsEnqueue(currArgs);
                    waitResult = true;

                    int numWait = 200;
                    while (numWait > 0 && waitResult)
                    {
                        numWait--;
                        await Task.Delay(waitDelay);
                    }
                }
                // se ho risultato mostro...
                if (!string.IsNullOrEmpty(lastSvg))
                {
                    svgContent = lastSvg;
                    // salvo!
                    ImgService.SaveSvg(id, svgContent);
                }
                else
                {
                    svgContent = "EMPTY";
                }
            }
            sw.Stop();
            _logger.LogInformation($"svgString | {sw.Elapsed.TotalMilliseconds:N3} ms");
            return Ok(svgContent);
        }

        /// <summary>
        /// Chiamata POST: riceve Json in formato JWD serializzato, lo ripete come risposta
        /// PUT: api/calc/svg/00000000-0000-0000-0000-000000000000
        /// </summary>
        /// <param name="id">id oggetto</param>
        /// <returns></returns>
        [HttpGet("svg/{id}")]
        public async Task<ActionResult<string>> svg(string id)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            string svgContent = "";
            // ...se ricevo percorso --> leggo jwd/svg cablato
            if (!string.IsNullOrEmpty(id))
            {
                svgContent = ImgService.LoadSvg(id);
            }
            sw.Stop();
            _logger.LogInformation($"svgString | {sw.Elapsed.TotalMilliseconds:N3} ms");
            return Ok(svgContent);
        }

        #endregion Public Methods

        #region Private Fields

        private readonly ILogger<WindowController> _logger;
        private IConfiguration _config;
        private bool enableEgwEng = true;

        //private Dictionary<int, string> listSvg = new Dictionary<int, string>();
        private string lastSvg = "";

        private int waitDelay = 10;

        private bool waitResult = false;

        #endregion Private Fields

        #region Private Properties

        private ImageCacheService ImgService { get; set; }

        /// <summary>
        /// Esecutore di processi generico
        /// </summary>
        private ExecProcessManager? ProcessMan { get; set; }

        #endregion Private Properties

        #region Private Methods

        /// <summary>
        /// Restituisce una risposta all'esecuzione
        /// </summary>
        /// <param name="ProcessArgsResult"></param>
        private void ProcessMan_m_AnswerReceived(ProcessArgsResult result)
        {
            // verifico che sia la mia richeista con id immagine... FARE!!!
            // salvo il risultato...
            if (result.Args != null && result.Args.Count > 0)
            {
                if (result.Args.ContainsKey("Svg"))
                {
                    // salvo SVG
                    string newSvg = result.Args["Svg"];
                    // salvo nel dizionario
                    lastSvg = newSvg;
                    waitResult = false;
                }
            }
        }

        #endregion Private Methods
    }
}