/*
 * (C) Copyright 2005- ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
 * virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
 */

/*
 * C Implementation: grib_index_build
 *
 */

#include "grib_tools.h"

const char* tool_description = "Build an index file for a set of input GRIB files.";
const char* tool_name        = "grib_index_build";
const char* tool_usage       = "[options] grib_file grib_file ... ";
static grib_index* idx       = NULL;
static char* keys;
static char* default_keys = "mars";

grib_option grib_options[] = {
    /*  {id, args, help}, on, command_line, value */
    { "f", 0, 0, 0, 1, 0 },
    { "o:", "output_index_file",
      "\n\t\tOutput is written to output_index_file."
      "\n\t\tIf an output index file is required and -o is not used, the"
      " output index is written to 'gribidx'\n",
      1, 1, "gribidx" },
    { "k:", 0, 0, 0, 1, 0 },
    { "V", 0, 0, 0, 1, 0 },
    { "T:", 0, 0, 0, 1, 0 },
    { "M", 0, 0, 0, 1, 0 },
    { "N", 0,
      "Do not compress index."
      "\n\t\tBy default the index is compressed to remove keys with only one value.\n",
      0, 1, 0 }
};

static int compress_index;

int grib_options_count = sizeof(grib_options) / sizeof(grib_option);

int main(int argc, char* argv[])
{
    return grib_tool(argc, argv);
}

int grib_tool_before_getopt(grib_runtime_options* options)
{
    return 0;
}

int grib_tool_init(grib_runtime_options* options)
{
    int ret         = 0;
    grib_context* c = grib_context_get_default();

    if (grib_options_on("N"))
        compress_index = 0;
    else
        compress_index = 1;

    if (grib_options_on("k:"))
        keys = grib_options_get_option("k:");
    else
        keys = default_keys;

    options->onlyfiles = 1;

    idx = grib_index_new(c, keys, &ret);

    if (!idx || ret)
        grib_context_log(c, GRIB_LOG_FATAL,
                         "Unable to create index %s", grib_get_error_message(ret));

    return 0;
}

int grib_tool_new_filename_action(grib_runtime_options* options, const char* file)
{
    int ret = 0;
    printf("--- %s: processing %s\n", tool_name, file);
    ret = grib_index_add_file(idx, file);
    if (ret) {
        printf("error: %s\n", grib_get_error_message(ret));
        exit(ret);
    }
    return 0;
}

int grib_tool_new_file_action(grib_runtime_options* options, grib_tools_file* file)
{
    return 0;
}

int grib_tool_new_handle_action(grib_runtime_options* options, grib_handle* h)
{
    return 0;
}

int grib_tool_skip_handle(grib_runtime_options* options, grib_handle* h)
{
    return 0;
}

void grib_tool_print_key_values(grib_runtime_options* options, grib_handle* h)
{
}

int grib_tool_finalise_action(grib_runtime_options* options)
{
    grib_index_key* the_keys;
    grib_string_list* values;
    int first;

    if (compress_index) {
        grib_index_compress(idx);
    }
    printf("--- %s: keys included in the index file %s:\n",
           tool_name, options->outfile->name);
    printf("--- ");
    first    = 1;
    the_keys = idx->keys;
    while (the_keys) {
        if (!first)
            printf(", ");
        printf("%s", the_keys->name);
        the_keys = the_keys->next;
        first    = 0;
    }
    printf("\n");
    the_keys = idx->keys;
    while (the_keys) {
        printf("--- %s = { ", the_keys->name);
        values = the_keys->values;
        first  = 1;
        while (values) {
            if (!first)
                printf(", ");
            printf("%s", values->value);
            first  = 0;
            values = values->next;
        }
        printf(" }\n");
        the_keys = the_keys->next;
    }
    printf("--- %d messages indexed\n", idx->count);

    if (idx->count)
        grib_index_write(idx, options->outfile->name);
    grib_index_delete(idx);
    return 0;
}

int grib_no_handle_action(grib_runtime_options* options, int err)
{
    fprintf(dump_file, "\t\t\"ERROR: unreadable message\"\n");
    return 0;
}