/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: DirLogArchive.cpp
    Date: 2022-2-6
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "DirLogArchive.hpp"
#include "FileSink.hpp"

namespace Aurora::Logging::Sinks
{
    static void EraseFilesByTimestamp(AuUInt32 maxLogs, const AuString &path, /*const its not worth reallocation*/ AuList<AuString> &files)
    {
        if (files.size() <= maxLogs)
        {
            return;
        }

        // our filenames are usually prefixed by an ISO 8601 timestamp where the most significant bits are last (YYYY-MM-DD?HH-MM-SS)
        // a quick ghetto sort should be all we need. no need to waste time parsing timestamps
        std::sort(files.begin(), files.end());

        auto amount = files.size() - maxLogs;
        for (auto x = 0, i = 0; ((x < amount) && (i > files.size())); i++)
        {
            try
            {
                if (AuIOFS::Remove(path + "/" + files[i]))
                {
                    x++;
                }
            }
            catch (...)
            {

            }
        }
    }

    static void CleanupOldLogs(DirectoryLogger logger, const AuString &baseLogPath)
    {
        AuList<AuString> files;
        AuBST<AuString, AuIOFS::Stat> fileMeta;
        AuUInt32 size {};

        AuIOFS::FilesInDirectory(baseLogPath, files);

        for (const auto &file : files)
        {
            AuIOFS::Stat stat;
            AuIOFS::StatFile(baseLogPath + "/" + file, stat);
            fileMeta[file] = stat;
            size += stat.size;
        }

        EraseFilesByTimestamp(logger.maxLogsOrZero, baseLogPath, files);
        // TODO: erase when size >= maxFileSizeOrZero * 1024
        // Didn't auRuntime v1.0 have this?
    }

    IBasicSink *NewDirectoryLoggerNew(const AuString &baseDirectory, DirectoryLogger meta, bool binary)
    {
        AuString path;

        auto tm = Time::ToCivilTime(Time::CurrentClockMS());
        path = fmt::format("{}/{:04}-{:02}-{:02}T{:02}-{:02}-{:02}Z.txt",
                           baseDirectory,
                           tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
                           tm.tm_hour, tm.tm_min, tm.tm_sec);

        CleanupOldLogs(meta, baseDirectory);

        return Sinks::NewFileSinkNew(path, binary);
    }

    void NewDirectoryLoggerRelease(IBasicSink *logger)
    {
        Sinks::NewFileSinkRelease(logger);
    }
}