// Copyright (C) 2025, The Duplicati Team
// https://duplicati.com, hello@duplicati.com
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using Duplicati.Library.Interface;
using Duplicati.Library.Main.Database;
using Duplicati.Library.Utility;

namespace Duplicati.Library.Main.Operation
{
    internal class CreateBugReportHandler
    {
        /// <summary>
        /// The tag used for logging
        /// </summary>
        private static readonly string LOGTAG = Logging.Log.LogTagFromType<CreateBugReportHandler>();
        private string m_targetpath;
        private readonly Options m_options;
        private readonly CreateLogDatabaseResults m_result;

        public CreateBugReportHandler(string targetpath, Options options, CreateLogDatabaseResults result)
        {
            m_targetpath = targetpath;
            m_options = options;
            m_result = result;
        }

        public async Task RunAsync()
        {
            var ext = Path.GetExtension(m_targetpath);
            var module = m_options.CompressionModule;

            if (ext == "" || string.Compare(ext, 1, module, 0, module.Length, StringComparison.OrdinalIgnoreCase) != 0)
                m_targetpath = m_targetpath + "." + module;

            if (File.Exists(m_targetpath))
                throw new UserInformationException(string.Format("Output file already exists, not overwriting: {0}", m_targetpath), "BugReportTargetAlreadyExists");

            if (!File.Exists(m_options.Dbpath))
                throw new UserInformationException(string.Format("Database file does not exist: {0}", m_options.Dbpath), "BugReportSourceDatabaseNotFound");

            m_result.OperationProgressUpdater.UpdatePhase(OperationPhase.BugReport_Running);
            m_result.OperationProgressUpdater.UpdateProgress(0);

            Logging.Log.WriteInformationMessage(LOGTAG, "ScrubbingFilenames", "Scrubbing filenames from database, this may take a while, please wait");

            using (var tmp = new TempFile())
            {
                File.Copy(m_options.Dbpath, tmp, true);
                await using (var db = await LocalBugReportDatabase.CreateAsync(tmp, null, m_result.TaskControl.ProgressToken).ConfigureAwait(false))
                {
                    await db.Fix(m_result.TaskControl.ProgressToken).ConfigureAwait(false);
                    if (m_options.AutoVacuum)
                        await db.Vacuum(m_result.TaskControl.ProgressToken).ConfigureAwait(false);
                }

                using (var stream = new FileStream(m_targetpath, FileMode.Create, FileAccess.Write, FileShare.Read))
                using (ICompression cm = DynamicLoader.CompressionLoader.GetModule(module, stream, ArchiveMode.Write, m_options.RawOptions))
                {
                    using (var cs = cm.CreateFile("log-database.sqlite", CompressionHint.Compressible, DateTime.UtcNow))
                    using (var fs = File.Open(tmp, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                        await Library.Utility.Utility.CopyStreamAsync(fs, cs, m_result.TaskControl.ProgressToken).ConfigureAwait(false);

                    using (var cs = new StreamWriter(cm.CreateFile("system-info.txt", CompressionHint.Compressible, DateTime.UtcNow)))
                        foreach (var line in SystemInfoHandler.GetSystemInfo())
                            cs.WriteLine(line);
                }

                m_result.TargetPath = m_targetpath;
            }
        }
    }
}