/*
 * Copyright 2005-2019 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: bufr_dump
 *
 */

#include "grib_tools.h"

grib_option grib_options[]={
        /*  {id, args, help}, on, command_line, value*/
        {"j:","s|f|a","\n\t\tJSON mode (JavaScript Object Notation)."
                "\n\t\tOptions: s->structure, f->flat (only data), a->all attributes"
                "\n\t\tDefault mode is structure.\n",
                1,1,"s"},
        {"D:","filter|fortran|python|C","\n\t\tDecoding dump. Provides instructions to decode the input message."
                "\n\t\tOptions: filter  -> filter instructions file to decode input BUFR"
                "\n\t\t         fortran -> fortran program to decode the input BUFR"
                "\n\t\t         python  -> python script to decode the input BUFR"
                "\n\t\t         C       -> C program to decode the input BUFR"
                "\n\t\tDefault mode is filter.\n",
                0,1,"filter"},
        {"E:","filter|fortran|python|C","\n\t\tEncoding dump. Provides instructions to create the input message."
                "\n\t\tOptions: filter  -> filter instructions file to encode input BUFR"
                "\n\t\t         fortran -> fortran program to encode the input BUFR"
                "\n\t\t         python  -> python script to encode the input BUFR"
                "\n\t\t         C       -> C program to encode the input BUFR"
                "\n\t\tDefault mode is filter.\n",
                0,1,"filter"},

        /*{"S",0,0,1,0,0},*/
        {"O",0,"Octet mode. WMO documentation style dump.\n",0,1,0},
        {"p",0,"Plain dump (key=value format).\n",0,1,0},
        /* {"D",0,0,0,1,0},  */  /* See ECC-215 */
        {"d",0,"Dump the expanded descriptors.\n",0,1,0},
        /*{"u",0,"Print only some values.\n",0,1,0},*/
        /* {"C",0,0,0,1,0}, */
        {"t",0,0,0,1,0},
        {"f",0,0,0,1,0},
        {"H",0,0,0,1,0},
        {"a",0,0,0,1,0},
        {"w:",0,0,0,1,0},
        {"s:",0,0,0,1,0},
        /* {"M",0,0,0,1,0}, */
        {"T:",0,0,1,0,"B"},
        {"7",0,0,0,1,0},
        {"V",0,0,0,1,0},
        {"q",0,0,1,0,0},
        {"S:","subset_number","\n\t\tDump the given subset\n",0,1,0},
        {"X:",0,0,0,1,0}
        /* {"x",0,0,0,1,0} */
};

const char* grib_tool_description="Dump the content of a BUFR file in different formats.";
const char* grib_tool_name="bufr_dump";
const char* grib_tool_usage="[options] bufr_file bufr_file ...";
static int json=0;
static int dump_descriptors=0;
static char* json_option=0;
static int first_handle=1;
static grib_dumper* dumper=0;

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

/**
 * bufr_dump
 * Dump the content of a BUFR file
 *
 */
int main(int argc, char *argv[])
{
    return grib_tool(argc,argv);
}

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

static void check_code_gen_dump_mode(const char* language)
{
    grib_context *c = grib_context_get_default();
    const int ok = (strcmp(language, "C")==0       ||
                    strcmp(language, "fortran")==0 ||
                    strcmp(language, "python")==0  ||
                    strcmp(language, "filter")==0);
    if (!ok) {
        grib_context_log(c, GRIB_LOG_ERROR, "Invalid language specified. Select one of: filter, fortran, python or C");
    }
}

int grib_tool_init(grib_runtime_options* options)
{
    int opt=grib_options_on("C")+grib_options_on("O");

    options->dump_mode = "default";

    if (opt > 1) {
        printf("%s: simultaneous j/C/O options not allowed\n",grib_tool_name);
        exit(1);
    }

    if (grib_options_on("j:")) {
        options->dump_mode = "json";
        json_option=grib_options_get_option("j:");
        if (strlen(json_option)>1 || ( json_option[0] != 's' && json_option[0]!= 'f' && json_option[0]!= 'a')) {
            printf("%s: Invalid JSON option %s\n", grib_tool_name, json_option);
            exit(1);
        }
        json=1;
    }

    if  (grib_options_on("O")) {
        options->dump_mode = "wmo";
        json=0;
        options->dump_flags = GRIB_DUMP_FLAG_CODED
                | GRIB_DUMP_FLAG_OCTECT
                | GRIB_DUMP_FLAG_VALUES
                | GRIB_DUMP_FLAG_READ_ONLY;
    }

    if  (grib_options_on("p")) {
        options->dump_mode = "bufr_simple";
        json=0;
    }

    if (grib_options_on("D:")) {
        options->dump_mode = grib_options_get_option("D:");
        check_code_gen_dump_mode(options->dump_mode);
        json=0;
    }
    if (grib_options_on("E:")) {
        options->dump_mode = grib_options_get_option("E:");
        check_code_gen_dump_mode(options->dump_mode);
        json=0;
    }

    /* See ECC-215
    if (grib_options_on("D")) {
        options->dump_mode = "debug";
        options->dump_flags = GRIB_DUMP_FLAG_VALUES
                |  GRIB_DUMP_FLAG_READ_ONLY;
    }  */

    if (grib_options_on("a"))
        options->dump_flags |= GRIB_DUMP_FLAG_ALIASES;

    if (grib_options_on("t"))
        options->dump_flags |= GRIB_DUMP_FLAG_TYPE;

    if (grib_options_on("H"))
        options->dump_flags |= GRIB_DUMP_FLAG_HEXADECIMAL;

    if (grib_options_on("d") && !grib_options_on("u")) {
        options->dump_flags |= GRIB_DUMP_FLAG_ALL_DATA;
        dump_descriptors = 1;
        json=0;
    }

    /* Turn off GRIB multi-field support mode. Not relevant for BUFR */
    grib_multi_support_off(grib_context_get_default());

    return 0;
}

int grib_tool_new_filename_action(grib_runtime_options* options,const char* file)
{
    return 0;
}

int grib_tool_new_file_action(grib_runtime_options* options,grib_tools_file* file)
{
    if (!options->current_infile->name) return 0;
    if (json) return 0;

    if (grib_options_on("E:") || grib_options_on("D:")) {
        if (!strcmp(options->dump_mode, "filter")) {
            /* Dump filter for one message only. Multi-message BUFR files will not work! */
            int err = 0, numMessages=0;
            grib_context *c = grib_context_get_default();
            err = grib_count_in_file(c, options->current_infile->file, &numMessages);
            if (!err && numMessages > 1) {
                fprintf(stderr,"\nERROR: Cannot dump filter for multi-message BUFR files.\n");
                fprintf(stderr,"       (The input file \"%s\" has %d messages)\n", options->current_infile->name, numMessages);
                fprintf(stderr,"       Please split the input file and dump filter for each message separately.\n");
                exit(1);
            }
        }
    }
    else {
        char tmp[1024];
        sprintf(tmp,"FILE: %s ",options->current_infile->name);
        if (!grib_options_on("p"))
            fprintf(stdout,"***** %s\n",tmp);
    }

    return 0;
}

static char* get_dumper_name(grib_runtime_options* options)
{
    if (grib_options_on("E:")) {
        /* Dumper for ENCODING */
        if (strcmp(options->dump_mode,"filter")==0) {
            return "bufr_encode_filter";
        }
        if (strcmp(options->dump_mode,"fortran")==0) {
            return "bufr_encode_fortran";
        }
        if (strcmp(options->dump_mode,"C")==0) {
            return "bufr_encode_C";
        }
        if (strcmp(options->dump_mode,"python")==0) {
            return "bufr_encode_python";
        }
    }
    else if (grib_options_on("D:")) {
        /* Dumper for DECODING */
        if (strcmp(options->dump_mode,"filter")==0) {
            return "bufr_decode_filter";
        }
        if (strcmp(options->dump_mode,"fortran")==0) {
            return "bufr_decode_fortran";
        }
        if (strcmp(options->dump_mode,"C")==0) {
            return "bufr_decode_C";
        }
        if (strcmp(options->dump_mode,"python")==0) {
            return "bufr_decode_python";
        }
    }
    return options->dump_mode;
}

static void print_header(grib_runtime_options* options)
{
    if (strcmp(options->dump_mode,"filter")==0) {
        int print_unpack=0;
        char generator_name[32];

        if (grib_options_on("D:")) {
            strcpy(generator_name, "-Dfilter");
            print_unpack = 1;
        }
        else if (grib_options_on("E:")) {
            strcpy(generator_name, "-Efilter");
        }

        fprintf(stdout,"#  This filter was automatically generated with bufr_dump %s\n", generator_name);
        fprintf(stdout,"#  Using ecCodes version: ");
        grib_print_api_version(stdout);
        fprintf(stdout, "\n\n");
        if (print_unpack) fprintf(stdout,"set unpack=1;\n");
    }
}

static void bufr_dump_descriptors(grib_handle* h)
{
    size_t size_desc=0, size_names=0, size_abbrevs=0, size_units=0;
    size_t i=0, j=0, size_proper=0;
    long*  array_descriptors = NULL;
    char** array_names = NULL;
    char** array_abbrevs = NULL;
    char** array_units = NULL;
    char* the_key = "expandedDescriptors";

    GRIB_CHECK_NOLINE( grib_get_size(h, the_key, &size_desc), 0);
    array_descriptors = (long*)malloc(size_desc*sizeof(long));
    if (!array_descriptors) {
        fprintf(stderr, "%s: Memory allocation error", the_key);
        exit(GRIB_OUT_OF_MEMORY);
    }
    GRIB_CHECK_NOLINE( grib_get_long_array(h, the_key, array_descriptors, &size_desc), 0);
    size_proper = size_desc;
    /* Exclude the pesky 999999 descriptors as they don't
     * have equivalents in the name, abbreviation and units arrays!
     */
    for(i=0; i<size_desc; ++i) {
        if(array_descriptors[i]==999999) size_proper--;
    }

    /* The string arrays for keys, names and units should have the same length*/
    the_key = "expandedAbbreviations";
    GRIB_CHECK_NOLINE( grib_get_size(h, the_key, &size_abbrevs), 0);
    array_abbrevs = (char**)malloc(size_abbrevs * sizeof(char*));
    if (!array_abbrevs) {
        fprintf(stderr, "%s: Memory allocation error", the_key);
        exit(GRIB_OUT_OF_MEMORY);
    }
    GRIB_CHECK_NOLINE( grib_get_string_array(h, the_key, array_abbrevs, &size_abbrevs), 0);
    Assert(size_proper==size_abbrevs);

    the_key = "expandedNames";
    GRIB_CHECK_NOLINE( grib_get_size(h, the_key, &size_names), 0);
    array_names = (char**)malloc(size_names * sizeof(char*));
    if (!array_names) {
        fprintf(stderr, "%s: Memory allocation error", the_key);
        exit(GRIB_OUT_OF_MEMORY);
    }
    GRIB_CHECK_NOLINE( grib_get_string_array(h, the_key, array_names, &size_names), 0);
    Assert(size_proper==size_names);

    the_key = "expandedUnits";
    GRIB_CHECK_NOLINE( grib_get_size(h, the_key, &size_units), 0);
    array_units = (char**)malloc(size_units * sizeof(char*));
    if (!array_units) {
        fprintf(stderr, "%s: Memory allocation error", the_key);
        exit(GRIB_OUT_OF_MEMORY);
    }
    GRIB_CHECK_NOLINE( grib_get_string_array(h, the_key, array_units, &size_units), 0);
    Assert(size_proper==size_units);

    i=0;
    j=0;
    while(i<size_desc) {
        const long desc = array_descriptors[i];
        if (desc == 999999) {
            printf("%06ld\t\t\n", desc);
        } else {
            char* abbr = array_abbrevs[j];
            char* name = array_names[j];
            char* units= array_units[j];
            printf("%06ld\t%s\t%s [%s]\n", desc, abbr, name, units);
            ++j;
            free(abbr);
            free(name);
            free(units);
        }
        ++i;
    }

    free(array_descriptors);
    free(array_abbrevs);
    free(array_names);
    free(array_units);
}

/*static*/ int check_subset_number(const char* user_input, long numberOfSubsets, long* subsetNumber)
{
    long val=0;
    char *endptr;
    errno = 0;    /* To distinguish success/failure after call */
    val = strtol(user_input, &endptr, 10);
    if ((errno == ERANGE && (val == LONG_MAX || val == LONG_MIN)) || (errno != 0 && val == 0)) {
        perror("strtol");
        return GRIB_INVALID_ARGUMENT;
    }
    if (endptr == user_input) {
        return GRIB_INVALID_ARGUMENT;
    }

    if (val < 1 || val > numberOfSubsets) {
        return GRIB_INVALID_ARGUMENT;
    }
    *subsetNumber = val;
    return GRIB_SUCCESS;
}
        
int grib_tool_new_handle_action(grib_runtime_options* options, grib_handle* h)
{
    long length=0;
    int i,err=0;
    long subsetNumber=0;
    grib_accessor* a=NULL;
    grib_accessors_list* al=NULL;
    if (grib_get_long(h,"totalLength",&length) != GRIB_SUCCESS)
        length = -9999;

    if (!options->skip) {
        if (options->set_values_count != 0)
            err=grib_set_values(h,options->set_values,options->set_values_count);
        if (err != GRIB_SUCCESS && options->fail) exit(err);
    }

    for (i=0;i<options->print_keys_count;i++)
        grib_set_flag(h,options->print_keys[i].name,GRIB_ACCESSOR_FLAG_DUMP);

    if (grib_options_on("S:")) {
        long val=0, numberOfSubsets=0;
        char *endptr, *str;
        errno = 0;    /* To distinguish success/failure after call */
        str = grib_options_get_option("S:");
        val = strtol(str, &endptr, 10);
        if ((errno == ERANGE && (val == LONG_MAX || val == LONG_MIN)) || (errno != 0 && val == 0)) {
            perror("strtol");
            exit(1);
        }
        if (endptr == str) {
            fprintf(stderr, "ERROR: -S option: No digits were found. Please specify a positive integer.\n");
            exit(1);
        }
        subsetNumber = val;
        err = grib_get_long(h,"numberOfSubsets",&numberOfSubsets);
        if (err) {
            fprintf(stderr, "ERROR: Failed to get numberOfSubsets\n");
            exit(1);
        }
        if (subsetNumber < 1 || subsetNumber > numberOfSubsets) {
            fprintf(stderr, "ERROR: -S option: Please specify a subset number > 0 and < %ld\n", numberOfSubsets+1);
            exit(1);
        }

        if (subsetNumber) {
            grib_handle* new_handle = 0;
            grib_handle *h2;
            size_t size = 0;
            const void *buffer = NULL;

            /*Clone, unpack and extract that particular subset*/
            h2 = grib_handle_clone(h);
            Assert(h2);
            GRIB_CHECK_NOLINE(grib_set_long(h2,"unpack", 1), 0);
            GRIB_CHECK_NOLINE(grib_set_long(h2,"extractSubset", subsetNumber), 0);
            GRIB_CHECK_NOLINE(grib_set_long(h2,"doExtractSubsets",1), 0);

            /*Put result into buffer then form new handle from it*/
            GRIB_CHECK_NOLINE(grib_get_message(h2, &buffer, &size),0);
            new_handle = grib_handle_new_from_message(0, buffer, size);
            Assert(new_handle);
            /*TODO: possible leak!*/
            h = new_handle;
        }
    }

    if (json)
    {
        /* ECC-233: print comma as separator between messages */
        if (!first_handle && options->handle_count>1) {
            fprintf(stdout,",\n");
        }
        if (json && first_handle) {
            fprintf(stdout,"{ \"messages\" : [ \n");
            first_handle=0;
        }
        switch (json_option[0]) {
        case 'f':
            err=grib_set_long(h,"unpack",2);
            if (err) {
                if (options->fail) {
                    fprintf(stderr, "ERROR: unable to unpack data section: %s (message=%d)\n",
                            grib_get_error_message(err), options->handle_count);
                    exit(err);
                } else {
                    fprintf(stdout,"\"ERROR: unable to unpack data section\"");
                    options->error=err;
                    /*return err; See ECC-723*/
                }
            }
            a=grib_find_accessor(h,"numericValues");
            al=accessor_bufr_data_array_get_dataAccessors(a);
            options->dump_flags=GRIB_DUMP_FLAG_ALL_ATTRIBUTES;
            codes_dump_bufr_flat(al,h,stdout,options->dump_mode,options->dump_flags,0);
            break;
        case 's':
            err=grib_set_long(h,"unpack",1);
            if (err) {
                if (options->fail) {
                    fprintf(stderr, "ERROR: unable to unpack data section: %s (message=%d)\n",
                            grib_get_error_message(err), options->handle_count);
                    exit(err);
                } else {
                    fprintf(stdout,"\"ERROR: unable to unpack data section\"");
                    options->error=err;
                    /*return err; See ECC-723*/
                }
            }
            grib_dump_content(h,stdout,options->dump_mode,options->dump_flags,0);
            break;
        case 'a':
            err=grib_set_long(h,"unpack",1);
            if (err) {
                if (options->fail) {
                    fprintf(stderr, "ERROR: unable to unpack data section: %s (message=%d)\n",
                            grib_get_error_message(err), options->handle_count);
                    exit(err);
                } else {
                    fprintf(stdout,"\"ERROR: unable to unpack data section\"");
                    options->error=err;
                    /*return err; See ECC-723*/
                }
            }
            options->dump_flags=GRIB_DUMP_FLAG_ALL_ATTRIBUTES;
            grib_dump_content(h,stdout,options->dump_mode,options->dump_flags,0);
            break;
        default :
            printf("Unknown JSON option %s\n",json_option);
            exit(1);
        }
        if (!strcmp(options->dump_mode,"default")) {
            printf("}\n");
        }
    }
    else if (grib_options_on("O"))
    {
        char tmp[1024];
        sprintf(tmp,"MESSAGE %d ( length=%ld )",options->handle_count,length);
        if (!grib_options_on("C"))
            fprintf(stdout,"#==============   %-38s   ==============\n",tmp);
        err=grib_set_long(h,"unpack",1);
        if (err) {
            if (options->fail) {
                fprintf(stderr, "ERROR: unable to unpack data section: %s\n",grib_get_error_message(err));
                exit(err);
            } else {
                fprintf(stdout,"ERROR: unable to unpack data section\n");
                options->error=err;
                /*return err; See ECC-723*/
            }
        }
        grib_dump_content(h,stdout,options->dump_mode,options->dump_flags,0);
    }
    else if (dump_descriptors)
    {
        /* Dump out the section 3 descriptors, their keys/units etc */
        bufr_dump_descriptors(h);
    }
    else
    {
        const char* dumper_name = get_dumper_name(options);
        if (strcmp(dumper_name, "bufr_simple")==0) {
            /* This speeds up the unpack by skipping attribute keys not used in the dump */
            grib_set_long(h, "skipExtraKeyAttributes", 1);
        }
        err=grib_set_long(h,"unpack",1);
        if (err) {
            if (options->fail) {
                fprintf(stderr, "ERROR: unable to unpack data section: %s\n",grib_get_error_message(err));
                exit(err);
            } else {
                fprintf(stdout,"\"ERROR: unable to unpack data section\"");
                options->error=err;
                /*return err; See ECC-723*/
            }
        }
        print_header(options);
        dumper=grib_dump_content_with_dumper(h,dumper,stdout,dumper_name,options->dump_flags,0);
        if (!dumper) exit(1);
        if (grib_options_on("p")) {
            printf("\n"); /* One blank line to separate the messages */
        }
    }

    return 0;
}

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

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

int grib_tool_finalise_action(grib_runtime_options* options)
{
    if (json) fprintf(stdout,"\n]}\n");

    if (grib_options_on("E:")) {
        /* Code for ENCODING */
        if (!strcmp(options->dump_mode,"filter")) {
            fprintf(stdout,"set pack=1;\nwrite;\n");
        }
        if (!strcmp(options->dump_mode,"fortran")) {
            fprintf(stdout,"end program bufr_encode\n");
        }
        if (!strcmp(options->dump_mode,"C")) {
            fprintf(stdout,"  return 0;\n");
            fprintf(stdout,"}\n");
        }
        if (!strcmp(options->dump_mode,"python")) {
            fprintf(stdout,"\n\n");
            fprintf(stdout,"def main():\n");
            fprintf(stdout,"    try:\n");
            fprintf(stdout,"        bufr_encode()\n");
            fprintf(stdout,"    except CodesInternalError as err:\n");
            fprintf(stdout,"        traceback.print_exc(file=sys.stderr)\n");
            fprintf(stdout,"        return 1\n");
            fprintf(stdout,"\n\n");
            fprintf(stdout,"if __name__ == \"__main__\":\n");
            fprintf(stdout,"    sys.exit(main())\n");
        }
    }
    else if (grib_options_on("D:")) {
        /* Code for DECODING */
        if (!strcmp(options->dump_mode,"filter")) {

        }
        if (!strcmp(options->dump_mode,"fortran")) {
            fprintf(stdout,"\n  call codes_close_file(ifile)\n");
            fprintf(stdout,"end program bufr_decode\n");
        }
        if (!strcmp(options->dump_mode,"C")) {
            fprintf(stdout,"  if (fclose(fin)!=0) {\n");
            fprintf(stdout,"    fprintf(stderr, \"Failed to close file handle.\\n\");\n");
            fprintf(stdout,"    return 1;\n");
            fprintf(stdout,"  }\n");
            fprintf(stdout,"  return 0;\n");
            fprintf(stdout,"}\n");
        }
        if (!strcmp(options->dump_mode,"python")) {
            fprintf(stdout,"\n\n");
            fprintf(stdout,"    f.close()\n\n");
            fprintf(stdout,"def main():\n");
            fprintf(stdout,"    if len(sys.argv) < 2:\n");
            fprintf(stdout,"        print('Usage: ', sys.argv[0], ' BUFR_file', file=sys.stderr)\n");
            fprintf(stdout,"        sys.exit(1)\n\n");
            fprintf(stdout,"    try:\n");
            fprintf(stdout,"        bufr_decode(sys.argv[1])\n");
            fprintf(stdout,"    except CodesInternalError as err:\n");
            fprintf(stdout,"        traceback.print_exc(file=sys.stderr)\n");
            fprintf(stdout,"        return 1\n");
            fprintf(stdout,"\n\n");
            fprintf(stdout,"if __name__ == \"__main__\":\n");
            fprintf(stdout,"    sys.exit(main())\n");
        }
    }
    return 0;
}

int grib_no_handle_action(grib_runtime_options* options, int err)
{
    if (json ){
        if (first_handle) {
            fprintf(dump_file,"{ \"messages\" : [ \n");
            first_handle=0;
        } else {
            fprintf(dump_file,",\n");
        }
    }
    fprintf(dump_file,"\"ERROR: unreadable message\"\n");
    if (options->fail) {
        exit(1);
    }
    return 0;
}