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

namespace AibisDream.YarnLocalizationValidation.Editor
{
    public static class YarnL10nReportExporter
    {
        public static void ExportToCsv(YarnL10nValidationResult result, string outputPath)
        {
            var directory = Path.GetDirectoryName(outputPath);
            if (!string.IsNullOrEmpty(directory))
            {
                Directory.CreateDirectory(directory);
            }

            var builder = new StringBuilder();
            builder.AppendLine("issueType,language,lineId,sourceText,locText,yarnFile,yarnLineNumber,csvFile,chapterFolder,message");

            foreach (var issue in result.Issues)
            {
                builder.AppendLine(string.Join(",",
                    Escape(issue.GetDisplayType()),
                    Escape(issue.Language),
                    Escape(issue.LineId),
                    Escape(issue.SourceText),
                    Escape(issue.LocText),
                    Escape(issue.YarnFile),
                    Escape(issue.YarnLineNumber),
                    Escape(issue.CsvFile),
                    Escape(issue.ChapterFolder),
                    Escape(issue.Message)));
            }

            File.WriteAllText(outputPath, builder.ToString(), new UTF8Encoding(encoderShouldEmitUTF8Identifier: true));
        }

        public static string BuildDefaultExportFileName(string chapterFolder)
        {
            var chapterName = string.IsNullOrEmpty(chapterFolder)
                ? "yarn_l10n"
                : Path.GetFileName(chapterFolder.Replace('/', Path.DirectorySeparatorChar));
            return $"{chapterName}_l10n_report_{System.DateTime.Now:yyyyMMdd_HHmmss}.csv";
        }

        private static string Escape(string value)
        {
            value ??= string.Empty;
            if (value.Contains('"') || value.Contains(',') || value.Contains('\n') || value.Contains('\r'))
            {
                return $"\"{value.Replace("\"", "\"\"")}\"";
            }

            return value;
        }
    }
}