using System.Collections.Generic;
using System.Text;

namespace Crowdin.Plugin.Helpers.FileHelpers
{
    using Server_API.Helpers;
    
    public static class CreateFileHelper
    {
        private static readonly List<string[]> RowData = new List<string[]>();

        public static void SaveTranslationsToFile(string filepath, string table, bool withTranslations)
        {
            RowData.Clear();
            var scheme = SettingsHelper.GetLanguageScheme();

            // Creating First row of titles manually..
            var rowDataTemp = new string[scheme.Count + 3];
            rowDataTemp[0] = "\"Key\"";
            rowDataTemp[1] = "\"Context\"";
            rowDataTemp[2] = $"\"{SettingsHelper.GetSourceLanguage()}\"";

            foreach (var languageItem in scheme)
            {
                rowDataTemp[languageItem.collumPos + 1] = $"\"{languageItem.langType}\"";
            }

            RowData.Add(rowDataTemp);

            foreach (var translationString in TranslationsHelper.GetTranslationStrings(table))
            {
                if (translationString == null)
                {
                    continue;
                }

                rowDataTemp = new string[rowDataTemp.Length];
                var key = translationString.key.Replace("\"", "\"\"");
                var value = translationString.sourceString.Replace("\"", "\"\"");
                var context = translationString.context?.Replace("\"", "\"\"");
                rowDataTemp[0] = $"\"{key}\"";
                rowDataTemp[1] = $"\"{context}\"";
                rowDataTemp[2] = $"\"{value}\"";

                if (withTranslations)
                {
                    foreach (var languageItem in scheme)
                    {
                        var translationIndex =
                            translationString.translations.FindIndex(item => item.language == languageItem.langType);

                        if (translationIndex == -1)
                        {
                            continue;
                        }

                        var textValue = translationString.translations[translationIndex].text;
                        if (textValue == null)
                        {
                            continue;
                        }

                        var translation = $"\"{textValue.Replace("\"", "\"\"")}\"";
                        rowDataTemp[languageItem.collumPos + 1] = translation;
                    }
                }

                RowData.Add(rowDataTemp);
            }

            var output = new string[RowData.Count][];

            for (var i = 0; i < output.Length; i++)
            {
                output[i] = RowData[i];
            }

            var length = output.GetLength(0);
            const string delimiter = ",";

            var stringBuilder = new StringBuilder();

            for (var index = 0; index < length; index++)
                stringBuilder.AppendLine(string.Join(delimiter, output[index]));

            RemoveFileHelper.RemoveFile(filepath);
            var outStream = System.IO.File.CreateText(filepath);
            outStream.WriteLine(stringBuilder.ToString().Trim());
            outStream.Close();
        }
    }
}