using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace crusherScanner
{
    /// <summary>
    /// Main entry point for sample checking functions.
    /// </summary>
    public class ProgramFunctions
    {
        private static string lastBarcodeScanned = "";
        public static bool ready = false;

        #region Contructor

        /// <summary>
        /// Constructor to load initial settings.
        /// </summary>
        public ProgramFunctions()
        {
            
            // no initial configuration present
            if (Properties.Settings.Default.OreDefInFile == "")
            {
                // Try to get settings from previous version of the app.
                Properties.Settings.Default.Upgrade();
                if (Properties.Settings.Default.OreDefInFile == "")
                {
                    if (File.Exists("config.json"))
                    {
                        MessageBox.Show("No configuration stored,\nloading configuration from 'config.json'", "Settings", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                        JsonHandler conf = new("config.json", true);
                        ImportConfigFile("config.json");
                    }
                    else
                    {
                        MessageBox.Show("No configuration stored,\nYou will need to enter settings manually.\nThe settings will open now.", "Settings", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                        SettingsDialog dlg = new();
                        dlg.ShowDialog();
                        dlg.Dispose();
                    }
                }
            }
            //TODO check if settings are ok to use before setting ready.

        }

        #endregion

        #region Main logic

        /// <summary>
        /// Check scanned sample ID in following order;
        ///  - LIMS existence (active samples in the last 90 days). warn operator if not.
        ///  - Is this an Ore def sample (RCA, RCB, RCC).
        ///  - If not Ore def pass sample to crusher.
        ///  - If Ore def without contamination send to crusher.
        ///  - If sample has contamination not the ID and only send to crusher if scanned twice.
        ///  - If sample could not be found in the Ore def lists. warn operator.
        /// </summary>
        /// <param name="scanned">Scaned sample details.</param>
        /// <returns></returns>
        public static Scan StartChecks(Scan scanned)
        {
            scanned.messageState = true;
            scanned = LimsAccess.IsInLims(scanned);
            if (!scanned.isInLims) // Check if this sample exists in LIMS
            {
                scanned.messageState = false;
                scanned.message = $"Sample {scanned.barcode} does not seem to be in LIMS.";
                return scanned;
            }

            scanned = OreDefData.CheckSampleType(scanned);
            if (scanned.sampleType == "Error!") // Check if sample prefix needs checking
            {
                scanned.messageState = false;
                scanned.message = "Unable to check sample due to a configuration issue.";
                return scanned;
            }

            if(scanned.sampleType == null) //sample is NOT an OreDef sample
            {
                scanned.message = $"Sample {scanned.barcode} is not an OreDef sample.";
                SerialAccess.SendToPrepmaster(scanned.barcode);
                lastBarcodeScanned = scanned.barcode;
                return scanned;
            }

            scanned = OreDefData.CheckContaminates(scanned);
            if (!scanned.Contaminated && !scanned.SampleNotFound) // No contamnination and SID found
            {
                scanned.message = $"Sample {scanned.barcode} is good to go.";
                SerialAccess.SendToPrepmaster(scanned.barcode);
                lastBarcodeScanned = scanned.barcode;
                return scanned;
            }
            else if (scanned.Contaminated && !scanned.SampleNotFound) // Contaminated sample found
            {
                scanned.message = "";
                if (lastBarcodeScanned == scanned.barcode)
                {
                    SerialAccess.SendToPrepmaster(scanned.barcode);
                }
                lastBarcodeScanned = scanned.barcode;
                return scanned;
            }
            else // Sample not found in job lists.
            {
                scanned.messageState = false;
                scanned.message = $"Sample {scanned.barcode} is not found in job lists.";
                return scanned;
            }
            
            
        }

        #endregion

        #region Settings functions

        /// <summary>
        /// Import app configuration from a JSON file.
        /// </summary>
        /// <param name="configFile">Path to file. (defaults to "config.json" in app directory)</param>
        public static void ImportConfigFile(string configFile = "config.json")
        {
            Settings tmpSettings = new();

            // Open JSON file to read
            string data = File.ReadAllText(configFile);
            using JsonDocument doc = JsonDocument.Parse(data);
            JsonElement root = doc.RootElement;
            var config = root;

            // Set config data from JSON into temp settings var for handling.
            tmpSettings.CrusherNo = (int)config.GetProperty("CrusherNo").GetInt32();
            tmpSettings.PrepmasterMagazineSerial = config.GetProperty("Serial").ToString();
            tmpSettings.OreDefInFile = config.GetProperty("OreDefInFile").ToString();
            tmpSettings.OreDefWorkFile = config.GetProperty("OreDefWorkFile").ToString();
            tmpSettings.OreDefOutFile = config.GetProperty("OreDefOutFile").ToString();
            tmpSettings.OutputFormat = config.GetProperty("OutputFormat").ToString();
            tmpSettings.OreDefTypes = config.GetProperty("OreDefTypes").ToString();
            tmpSettings.LimsConnection = config.GetProperty("LimsConnection").GetBoolean();
            tmpSettings.LimsConnString = config.GetProperty("LimsConnString").ToString();
            tmpSettings.PrepmasterConnection = config.GetProperty("PrepmasterConnection").GetBoolean();
            tmpSettings.LoggingDebug = config.GetProperty("LoggingDebug").GetBoolean();
            tmpSettings.LoggingInfo = config.GetProperty("LoggingInfo").GetBoolean();
            tmpSettings.LoggingWarning = config.GetProperty("LoggingWarning").GetBoolean();
            tmpSettings.LoggingError = config.GetProperty("LoggingError").GetBoolean();

            // Check settings, if good save to applications cache.
            if(SettingsHandler.CheckSettings(tmpSettings))
            {
                SaveSettings(tmpSettings);
            }

        }

        /// <summary>
        /// Save settings from temp var to app cache.
        /// </summary>
        /// <param name="configuration">Pre checked settings to save.</param>
        public static void SaveSettings(Settings configuration)
        {
            Properties.Settings.Default.CrusherNo = configuration.CrusherNo;
            Properties.Settings.Default.PrepmasterMagazineSerial = configuration.PrepmasterMagazineSerial;
            Properties.Settings.Default.OreDefInFile = configuration.OreDefInFile;
            Properties.Settings.Default.OreDefWorkFile = configuration.OreDefWorkFile;
            Properties.Settings.Default.OreDefOutFile = configuration.OreDefOutFile;
            Properties.Settings.Default.OutputFormat = configuration.OutputFormat;
            Properties.Settings.Default.OreDefTypes = configuration.OreDefTypes;
            Properties.Settings.Default.LimsConnection = configuration.LimsConnection;
            Properties.Settings.Default.LimsConnString = configuration.LimsConnString;
            Properties.Settings.Default.PrepmasterConnection = configuration.PrepmasterConnection;
            Properties.Settings.Default.LoggingDebug = configuration.LoggingDebug;
            Properties.Settings.Default.LoggingInfo = configuration.LoggingInfo;
            Properties.Settings.Default.LoggingWarning = configuration.LoggingWarning;
            Properties.Settings.Default.LoggingError = configuration.LoggingError;

            Properties.Settings.Default.Save();
        }

            /// <summary>
            ///  Export a Json configuration file.
            /// </summary>
            /// <param name="configFile">File path and file name to save the config file to.</param>
            public static void ExportConfigFile(string configFile = "config.json")
        {
            using var ms = new MemoryStream();
            using var writer = new Utf8JsonWriter(ms);

            writer.WriteStartObject();
            writer.WriteNumber("CrusherNo", Properties.Settings.Default.CrusherNo);
            writer.WriteString("Serial", Properties.Settings.Default.PrepmasterMagazineSerial);
            writer.WriteString("OreDefInFile", Properties.Settings.Default.OreDefInFile);
            writer.WriteString("OreDefWorkFile", Properties.Settings.Default.OreDefWorkFile);
            writer.WriteString("OreDefOutFile", Properties.Settings.Default.OreDefOutFile);
            writer.WriteString("OutputFormat", Properties.Settings.Default.OutputFormat);
            writer.WriteString("OreDefTypes", Properties.Settings.Default.OreDefTypes);
            writer.WriteBoolean("LimsConnection", Properties.Settings.Default.LimsConnection);
            writer.WriteString("LimsConnString", Properties.Settings.Default.LimsConnString);
            writer.WriteBoolean("PrepmasterConnection", Properties.Settings.Default.PrepmasterConnection);
            writer.WriteBoolean("LoggingDebug", Properties.Settings.Default.LoggingDebug);
            writer.WriteBoolean("LoggingInfo", Properties.Settings.Default.LoggingInfo);
            writer.WriteBoolean("LoggingWarning", Properties.Settings.Default.LoggingWarning);
            writer.WriteBoolean("LoggingError", Properties.Settings.Default.LoggingError);

            writer.WriteEndObject();
            writer.Flush();
            string json = Encoding.UTF8.GetString(ms.ToArray());
            File.WriteAllText(configFile, json);
        }

        #endregion

    }
}