/**
 * Copyright (c) 2007-2012, Timothy Stack
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * * Neither the name of Timothy Stack nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <algorithm>

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "base/injector.bind.hh"
#include "base/injector.hh"
#include "base/isc.hh"
#include "base/opt_util.hh"
#include "config.h"
#include "log_format.hh"
#include "log_format_loader.hh"
#include "logfile.hh"

using namespace std;

typedef enum {
    MODE_NONE,
    MODE_ECHO,
    MODE_LINE_COUNT,
    MODE_TIMES,
    MODE_LEVELS,
} dl_mode_t;

static auto bound_file_options_hier
    = injector::bind<lnav::safe_file_options_hier>::to_singleton();

time_t
time(time_t* _unused)
{
    return 1194107018;
}

int
main(int argc, char* argv[])
{
    int c, retval = EXIT_SUCCESS;
    dl_mode_t mode = MODE_NONE;
    string expected_format;

    {
        static auto builtin_formats
            = injector::get<std::vector<std::shared_ptr<log_format>>>();
        auto& root_formats = log_format::get_root_formats();

        log_format::get_root_formats().insert(root_formats.begin(),
                                              builtin_formats.begin(),
                                              builtin_formats.end());
        builtin_formats.clear();
    }

    {
        std::vector<lnav::console::user_message> errors;
        vector<std::filesystem::path> paths;

        getenv_opt("test_dir") |
            [&paths](auto value) { paths.emplace_back(value); };
        load_formats(paths, errors);
    }

    while ((c = getopt(argc, argv, "ef:ltv")) != -1) {
        switch (c) {
            case 'f':
                expected_format = optarg;
                break;
            case 'e':
                mode = MODE_ECHO;
                break;
            case 'l':
                mode = MODE_LINE_COUNT;
                break;
            case 't':
                mode = MODE_TIMES;
                break;
            case 'v':
                mode = MODE_LEVELS;
                break;
        }
    }

    argc -= optind;
    argv += optind;

    if (retval == EXIT_FAILURE) {
    } else if (argc == 0) {
        fprintf(stderr, "error: expecting log file name\n");
    } else {
        isc::supervisor root_superv(injector::get<isc::service_list>());
        logfile_open_options default_loo;
        auto open_res = logfile::open(argv[0], default_loo);

        if (open_res.isErr()) {
            fprintf(stderr,
                    "unable to open logfile: %s\n",
                    open_res.unwrapErr().c_str());
            return EXIT_FAILURE;
        }

        auto lf = open_res.unwrap();
        struct stat st;

        stat(argv[0], &st);
        assert(strcmp(argv[0], lf->get_filename().c_str()) == 0);

        lf->rebuild_index();
        assert(!lf->is_closed());
        lf->rebuild_index();
        assert(!lf->is_closed());
        lf->rebuild_index();
        assert(!lf->is_closed());
        assert(lf->get_activity().la_polls == 3);
        if (expected_format.empty()) {
            assert(lf->get_format() == nullptr);
        } else {
            // printf("%s %s\n", lf->get_format()->get_name().c_str(),
            // expected_format.c_str());
            assert(lf->get_format() != nullptr);
            assert(lf->get_format()->get_name().to_string() == expected_format);
        }
        if (!lf->is_compressed()) {
            assert(std::chrono::duration_cast<std::chrono::seconds>(
                       lf->get_modified_time())
                       .count()
                   == st.st_mtime);
        }

        switch (mode) {
            case MODE_NONE:
                break;
            case MODE_ECHO:
                for (auto iter = lf->begin(); iter != lf->end(); ++iter) {
                    auto sbr = lf->read_line(iter).unwrap();

                    printf("%.*s\n", (int) sbr.length(), sbr.get_data());
                }
                break;
            case MODE_LINE_COUNT:
                printf("%zd\n", lf->size());
                break;
            case MODE_TIMES:
                for (auto& iter : *lf) {
                    if (iter.is_ignored()) {
                        continue;
                    }

                    char buffer[1024];
                    auto lt = to_time_t(iter.get_time<std::chrono::seconds>());
                    strftime(buffer,
                             sizeof(buffer),
                             "%b %d %H:%M:%S %Y",
                             gmtime(&lt));
                    printf("%s -- %03lld\n",
                           buffer,
                           iter.get_subsecond_time<std::chrono::milliseconds>()
                               .count());
                }
                break;
            case MODE_LEVELS:
                for (auto& iter : *lf) {
                    log_level_t level = iter.get_level_and_flags();
                    printf("%s 0x%x\n",
                           level_names[level & ~LEVEL__FLAGS],
                           level & LEVEL__FLAGS);
                }
                break;
        }
    }

    return retval;
}
