#!/usr/bin/env perl

use strict;
use File::Path ;
use File::Basename ;
use File::Copy;
use Cwd;
use DBI;

my $basedir = dirname($0);

my $db="param";
my $host = $ENV{'PARAM_DB_HOST'} || 'unknown';
my $user = $ENV{'PARAM_DB_USER'} || 'unknown';
my $pass = $ENV{'PARAM_DB_PASS'} || 'unknown';

my $filename; my $filebase; my $out; my $conceptDir;
my $query; my $q; my $qh;

my $dbh  = DBI->connect("dbi:mysql(RaiseError=>1):database=$db;host=$host",$user,$pass) or die $DBI::errstr;

# I have written to it already or not
#my $tarfilesflag = 0;

sub create_cfName {
    my $p; my %seen;
    my ($key) = "cfName";
    my $field = "cf.name";

    my $query= <<"EOF";
    select $field,force128,edition,
    centre.abbreviation,param_id,attribute.name,attribute_value,param.name,param.shortName from
    param,grib_encoding,grib,attribute,centre,units,cf where
    param.hide_def=0 and
    param.retired=0 and
    grib_encoding.published=1 and
    grib_encoding.id=grib.encoding_id and
    param.id=grib_encoding.param_id and
    attribute.id=grib.attribute_id and
    centre.id=grib_encoding.centre_id and
    units.id=param.units_id and
    param.id=cf.grib1_ecmwf and
    grib_encoding.is_legacy=0 and
#    grib_encoding.is_mtg2_switch_0 = 0 and
#    grib_encoding.is_mtg2_switch_1 = 1 and
#    grib_encoding.is_mtg2_switch_2 = 0 order by
    grib_encoding.is_mtg2_switch_1 = 1 order by
    edition,centre_id,param.o,param.id,grib_encoding.param_version,attribute.o;
EOF

    my $qh=$dbh->prepare($query);
    $qh->execute();

    # file containing the list of grib api parameters files we want to tar and
    # distribute to users for them to download and update their list of parameter
    # to the latest
    #open(TAR,$tarfilesflag ? ">>" : ">","tarfiles.txt") or die "Count not open file tarfiles.txt: $!";
    #$tarfilesflag=1;

    while (my ($keyval,$force128,$edition,$centre,$paramId,$attribute,$value,$name,$shortName)=$qh->fetchrow_array )
    {
        if ($centre eq "wmo" ) { $conceptDir=""; }
        else { $conceptDir="/localConcepts/$centre"; }

        if ($filebase ne "$basedir/grib$edition$conceptDir") {
            if ($filebase) {
                print $out "}\n";
                close $out;
            }
            $filebase="$basedir/grib$edition$conceptDir";
            mkpath($filebase);

            print TAR "grib$edition$conceptDir/$key.def\n";
            #system("cp -f $filebase/$key.def $filebase/$key.def.orig");
            open($out,"> $filebase/$key.def")
                or die "unable to open $filebase/$key.def";
            print $out "# Automatically generated by $0, do not edit\n";
            $p=();
        }
        if ($p ne $paramId || exists($seen{$attribute}) ) {
           if ($p) { print $out "\t}\n"; }
           print $out "#$name\n" ;
           print $out "\'".$keyval."\' = {\n" ;
           $p=$paramId;
           %seen=();
        }
        $seen{$attribute}=1;
        print "($key=$keyval) $edition,$centre,$shortName,$paramId,$name,$attribute,$value\n";
        # we need to allow strings in the attribute_value field
        # for the moment we apply a patch here
        if ($attribute =~ /stepType/ ) {
            $value="\"accum\"";
        }
        if ($value eq '') {
            $value="missing()";
        }
        print $out "\t $attribute = $value ;\n" ;
    }
    if ($filebase) {
       print $out "}\n";
       close $out;
    }

    close(TAR);
}

sub create_cfName_legacy {
    my $p; my %seen;
    my ($key) = "cfName";
    my $field = "cf.name";

    my $query= <<"EOF";
    select $field,force128,edition,
    centre.abbreviation,param_id,attribute.name,attribute_value,param.name,param.shortName from
    param,grib_encoding,grib,attribute,centre,units,cf where
    param.hide_def=0 and
#    param.retired=0 and
    grib_encoding.id=grib.encoding_id and
    param.id=grib_encoding.param_id and
    attribute.id=grib.attribute_id and
    centre.id=grib_encoding.centre_id and
    units.id=param.units_id and
    param.id=cf.grib1_ecmwf and
#    grib_encoding.is_mtg2_switch_0 = 0 and
#    grib_encoding.is_mtg2_switch_1 = 1 and
#    grib_encoding.is_mtg2_switch_2 = 0 and
#    grib_encoding.is_mtg2_switch_1 = 1 and
    grib_encoding.is_legacy=1 order by
    edition,centre_id,param.o,param.id,grib_encoding.param_version,attribute.o;
EOF

    my $qh=$dbh->prepare($query);
    $qh->execute();

    # file containing the list of grib api parameters files we want to tar and
    # distribute to users for them to download and update their list of parameter
    # to the latest
    #open(TAR,$tarfilesflag ? ">>" : ">","tarfiles.txt") or die "Count not open file tarfiles.txt: $!";
    #$tarfilesflag=1;

    while (my ($keyval,$force128,$edition,$centre,$paramId,$attribute,$value,$name,$shortName)=$qh->fetchrow_array )
    {
        if ($centre eq "wmo" ) { $conceptDir=""; }
        else { $conceptDir="/localConcepts/$centre"; }

        if ($filebase ne "$basedir/grib$edition$conceptDir") {
            if ($filebase) {
                print $out "}\n";
                close $out;
            }
            $filebase="$basedir/grib$edition$conceptDir";
            mkpath($filebase);

            print TAR "grib$edition$conceptDir/$key.legacy.def\n";
            #system("cp -f $filebase/$key.def $filebase/$key.def.orig");
            open($out,"> $filebase/$key.legacy.def")
                or die "unable to open $filebase/$key.legacy.def";
            print $out "# Automatically generated by $0, do not edit\n";
            $p=();
        }
        if ($p ne $paramId || exists($seen{$attribute}) ) {
           if ($p) { print $out "\t}\n"; }
           print $out "#$name\n" ;
           print $out "\'".$keyval."\' = {\n" ;
           $p=$paramId;
           %seen=();
        }
        $seen{$attribute}=1;
        print "($key=$keyval) $edition,$centre,$shortName,$paramId,$name,$attribute,$value\n";
        # we need to allow strings in the attribute_value field
        # for the moment we apply a patch here
        if ($attribute =~ /stepType/ ) {
            $value="\"accum\"";
        }
        if ($value eq '') {
            $value="missing()";
        }
        print $out "\t $attribute = $value ;\n" ;
    }
    if ($filebase) {
       print $out "}\n";
       close $out;
    }

    close(TAR);
}

sub create_def {
    my $p; my %seen;
    my ($key) =@_;
    my $field=$key;

    if ($key =~ /paramId/) { $field="param.id"; }
    if ($key =~ /name/) { $field="param.name"; }
    if ($key =~ /units/) { $field="units.name"; }

    my $query= <<"EOF";
        select $field,force128,edition,
        centre.abbreviation,param_id,attribute.name,attribute_value,param.name,param.shortName
        from param,grib_encoding,grib,attribute,centre,units where
        param.hide_def=0 and
        param.retired=0 and
        grib_encoding.published=1 and
        grib_encoding.id=grib.encoding_id and
        param.id=grib_encoding.param_id and
        attribute.id=grib.attribute_id and
        centre.id=grib_encoding.centre_id and
        units.id=param.units_id and
        grib_encoding.is_legacy=0 and
#        grib_encoding.is_mtg2_switch_0 = 0 and
#        grib_encoding.is_mtg2_switch_1 = 1 and
#        grib_encoding.is_mtg2_switch_2 = 0
        grib_encoding.is_mtg2_switch_1 = 1 order by
        edition,centre_id,param.o,param.id,grib_encoding.param_version,attribute.o;
EOF

    my $qh=$dbh->prepare($query);
    $qh->execute();

    # file containing the list of grib api parameters files we want to tar and
    # distribute to users for them to download and update their list of parameter
    # to the latest
    #open(TAR,$tarfilesflag ? ">>" : ">","tarfiles.txt") or die "Count not open file tarfiles.txt: $!";
    #$tarfilesflag=1;

    while (my ($keyval,$force128,$edition,$centre,$paramId,$attribute,$value,$name,$shortName)=$qh->fetchrow_array )
    {
        if ($centre eq "wmo" ) { $conceptDir=""; }
        else { $conceptDir="/localConcepts/$centre"; }
        #if ($key =~ /paramId/ && $force128==1 && $keyval >1000) {
        #  $keyval= $keyval % 1000;
        #}

        if ($filebase ne "$basedir/grib$edition$conceptDir") {
            if ($filebase) {
                print $out "}\n";
                close $out;
            }
            $filebase="$basedir/grib$edition$conceptDir";
            mkpath($filebase);

            #copy("$filebase/$key.def","$filebase/$key.def.bkp")
            #  or die ("unable to copy $filebase/$key.def");

            print TAR "grib$edition$conceptDir/$key.def\n";
            #system("cp -f $filebase/$key.def $filebase/$key.def.orig");
            open($out,"> $filebase/$key.def")
                or die "unable to open $filebase/$key.def";
            print $out "# Automatically generated by $0, do not edit\n";
            $p=();
        }
        if ($p ne $paramId || exists($seen{$attribute}) ) {
           if ($p) { print $out "\t}\n"; }
           print $out "#$name\n" ;
           print $out "\'".$keyval."\' = {\n" ;
           $p=$paramId;
           %seen=();
        }
        $seen{$attribute}=1;
        print "($key=$keyval) $edition,$centre,$shortName,$paramId,$name,$attribute,$value\n";
        # we need to allow strings in the attribute_value field
        # for the moment we apply a patch here
        if ($attribute =~ /stepType/ ) {
            $value="\"accum\"";
        }
        if ($value eq '') {
            $value="missing()";
        }
        print $out "\t $attribute = $value ;\n" ;
    }
    if ($filebase) {
       print $out "}\n";
       close $out;
    }

    close(TAR);
}

sub create_def_legacy {
    my $p; my %seen;
    my ($key) =@_;
    my $field=$key;

    if ($key =~ /paramId/) { $field="param.id"; }
    if ($key =~ /name/) { $field="param.name"; }
    if ($key =~ /units/) { $field="units.name"; }

    my $query= <<"EOF";
        select $field,force128,edition,
        centre.abbreviation,param_id,attribute.name,attribute_value,param.name,param.shortName
        from param,grib_encoding,grib,attribute,centre,units where
        param.hide_def=0 and
#        param.retired=0 and
        grib_encoding.id=grib.encoding_id and
        param.id=grib_encoding.param_id and
        attribute.id=grib.attribute_id and
        centre.id=grib_encoding.centre_id and
        units.id=param.units_id and
        grib_encoding.is_legacy=1 order by
#        grib_encoding.is_mtg2_switch_0 = 0 and
#        grib_encoding.is_mtg2_switch_1 = 1 and
#        grib_encoding.is_mtg2_switch_2 = 0
#        grib_encoding.is_mtg2_switch_1 = 1 order by
        edition,centre_id,param.o,param.id,grib_encoding.param_version,attribute.o;
EOF

    my $qh=$dbh->prepare($query);
    $qh->execute();

    # file containing the list of grib api parameters files we want to tar and
    # distribute to users for them to download and update their list of parameter
    # to the latest
    #open(TAR,$tarfilesflag ? ">>" : ">","tarfiles.txt") or die "Count not open file tarfiles.txt: $!";
    #$tarfilesflag=1;

    while (my ($keyval,$force128,$edition,$centre,$paramId,$attribute,$value,$name,$shortName)=$qh->fetchrow_array )
    {
        if ($centre eq "wmo" ) { $conceptDir=""; }
        else { $conceptDir="/localConcepts/$centre"; }
        #if ($key =~ /paramId/ && $force128==1 && $keyval >1000) {
        #  $keyval= $keyval % 1000;
        #}

        if ($filebase ne "$basedir/grib$edition$conceptDir") {
            if ($filebase) {
                print $out "}\n";
                close $out;
            }
            $filebase="$basedir/grib$edition$conceptDir";
            mkpath($filebase);

            #copy("$filebase/$key.def","$filebase/$key.def.bkp")
            #  or die ("unable to copy $filebase/$key.def");

            print TAR "grib$edition$conceptDir/$key.legacy.def\n";
            #system("cp -f $filebase/$key.def $filebase/$key.def.orig");
            open($out,"> $filebase/$key.legacy.def")
                or die "unable to open $filebase/$key.legacy.def";
            print $out "# Automatically generated by $0, do not edit\n";
            $p=();
        }
        if ($p ne $paramId || exists($seen{$attribute}) ) {
           if ($p) { print $out "\t}\n"; }
           print $out "#$name\n" ;
           print $out "\'".$keyval."\' = {\n" ;
           $p=$paramId;
           %seen=();
        }
        $seen{$attribute}=1;
        print "($key=$keyval) $edition,$centre,$shortName,$paramId,$name,$attribute,$value\n";
        # we need to allow strings in the attribute_value field
        # for the moment we apply a patch here
        if ($attribute =~ /stepType/ ) {
            $value="\"accum\"";
        }
        if ($value eq '') {
            $value="missing()";
        }
        print $out "\t $attribute = $value ;\n" ;
    }
    if ($filebase) {
       print $out "}\n";
       close $out;
    }

    close(TAR);
}

sub create_cfVarName {
    my $p; my %seen;
    my ($key) =@_;
    my $field=$key;

    #if ($key =~ /paramId/) { $field="param.id"; }
    #if ($key =~ /name/) { $field="param.name"; }
    #if ($key =~ /units/) { $field="units.name"; }
    if ($key =~ /cfVarName/) { $field="cfVarName"; }

    my $query= <<"EOF";
        select $field,force128,edition,
        centre.abbreviation,param_id,attribute.name,attribute_value,param.name,param.shortName
        from param,grib_encoding,grib,attribute,centre,units where
        param.hide_def=0 and
        grib_encoding.id=grib.encoding_id and
        param.id=grib_encoding.param_id and
        attribute.id=grib.attribute_id and
        centre.id=grib_encoding.centre_id and
        units.id=param.units_id
#        grib_encoding.is_mtg2_switch_0 = 0 and
#        grib_encoding.is_mtg2_switch_1 = 1 and
#        grib_encoding.is_mtg2_switch_2 = 0 
#        grib_encoding.is_mtg2_switch_1 = 1
        and cfVarName IS NOT NULL
        order by edition,centre_id,param.o,param.id,grib_encoding.param_version,attribute.o;
EOF

    my $qh=$dbh->prepare($query);
    $qh->execute();

    # file containing the list of grib api parameters files we want to tar and
    # distribute to users for them to download and update their list of parameter
    # to the latest
    #open(TAR,$tarfilesflag ? ">>" : ">","tarfiles.txt") or die "Count not open file tarfiles.txt: $!";
    #$tarfilesflag=1;

    while (my ($keyval,$force128,$edition,$centre,$paramId,$attribute,$value,$name,$shortName)=$qh->fetchrow_array )
    {
        if ($centre eq "wmo" ) { $conceptDir=""; }
        else { $conceptDir="/localConcepts/$centre"; }
        #if ($key =~ /paramId/ && $force128==1 && $keyval >1000) {
        #  $keyval= $keyval % 1000;
        #}

        if ($filebase ne "$basedir/grib$edition$conceptDir") {
            if ($filebase) {
                print $out "}\n";
                close $out;
            }
            $filebase="$basedir/grib$edition$conceptDir";
            mkpath($filebase);

            #copy("$filebase/$key.def","$filebase/$key.def.bkp")
            #  or die ("unable to copy $filebase/$key.def");

            print TAR "grib$edition$conceptDir/$key.def\n";
            #system("cp -f $filebase/$key.def $filebase/$key.def.orig");
            open($out,"> $filebase/$key.def")
                or die "unable to open $filebase/$key.def";
            print $out "# Automatically generated by $0, do not edit\n";
            $p=();
        }
        if ($p ne $paramId || exists($seen{$attribute}) ) {
           if ($p) { print $out "\t}\n"; }
           print $out "#$name\n" ;
           print $out "\'".$keyval."\' = {\n" ;
           $p=$paramId;
           %seen=();
        }
        $seen{$attribute}=1;
        print "($key=$keyval) $edition,$centre,$shortName,$paramId,$name,$attribute,$value\n";
        # we need to allow strings in the attribute_value field
        # for the moment we apply a patch here
        if ($attribute =~ /stepType/ ) {
            $value="\"accum\"";
        }
        if ($value eq '') {
            $value="missing()";
        }
        print $out "\t $attribute = $value ;\n" ;
    }
    if ($filebase) {
       print $out "}\n";
       close $out;
    }

    close(TAR);
}

sub create_paramId_def {
    my $p; my %seen;

    my $query="select edition,centre.abbreviation,param_id,attribute.name,attribute_value,param.name,param.shortName
    from param,grib_encoding,grib,attribute,centre where
    param.hide_def=0 and
    param.retired=0 and
    grib_encoding.published=1 and
    grib_encoding.id=grib.encoding_id and
    param.id=grib_encoding.param_id and
    attribute.id=grib.attribute_id and
    centre.id=grib_encoding.centre_id and
    grib_encoding.is_legacy=0 and
#    grib_encoding.is_mtg2_switch_0 = 0 and
#    grib_encoding.is_mtg2_switch_1 = 1 and
#    grib_encoding.is_mtg2_switch_2 = 0
    grib_encoding.is_mtg2_switch_1 = 1 order by
    edition,centre_id,param.o,param.id,attribute.o";
    my $qh=$dbh->prepare($query);
    $qh->execute();

    while (my ($edition,$centre,$paramId,$attribute,$value,$name,$shortName)=$qh->fetchrow_array )
    {
        if ($centre eq "wmo" ) { $conceptDir=""; }
        else { $conceptDir="/localConcepts/$centre"; }

        if ($filebase ne "$basedir/grib$edition$conceptDir") {
            if ($filebase) {
                print $out "}\n";
                close $out;
            }
            $filebase="$basedir/grib$edition$conceptDir";
            mkpath($filebase);

            copy("$filebase/paramId.def","$filebase/paramId.def.bkp")
                or die ("unable to copy $filebase/paramId.def");
            open($out,"> $filebase/paramId.def")
                or die "unable to open $filebase/paramId.def";
            print $out "# Automatically generated by $0, do not edit\n";
            $p=();
        }
        if ($p ne $paramId || exists($seen{$attribute}) ) {
            if ($p) { print $out "\t}\n"; }
            print $out "#$name\n" ;
            print $out "\'".$paramId."\' = {\n" ;
            $p=$paramId;
            %seen=();
        }
        $seen{$attribute}=1;
        print "$edition,$centre,$shortName,$paramId,$name,$attribute,$value\n";
        print $out "\t $attribute = $value ;\n" ;
    }
    if ($filebase) {
       print $out "}\n";
       close $out;
    }
}

sub create_def_old {
    my ($key,$query)=@_;

    my $qh=$dbh->prepare($query);
    $qh->execute();

    while (my ($edition,$centre,$paramId,$value)=$qh->fetchrow_array )
    {
        if ($centre eq "wmo" ) { $conceptDir=""; }
        else { $conceptDir="/localConcepts/$centre"; }

        if ($filebase ne "$basedir/grib$edition$conceptDir") {
            if ($filebase) {
                close $out;
            }
            $filebase="$basedir/grib$edition$conceptDir";
            mkpath($filebase);

            copy("$filebase/$key.def","$filebase/$key.def.bkp")
                or die ("unable to copy $filebase/$key.def");
            open($out,"> $filebase/$key.def")
                or die "unable to open $filebase/$key.def";
            print $out "# Automatically generated by $0, do not edit\n";
        }
        print $out "\'$value\' \t= { paramId=$paramId; }\n";
    }
    if ($filebase) {
       close $out;
    }
}

create_def("paramId");
create_def_legacy("paramId");
create_def("shortName");
create_def_legacy("shortName");
create_def("name");
create_def_legacy("name");
create_def("units");
create_def_legacy("units");
create_cfVarName("cfVarName");
create_cfName("cfName");
create_cfName_legacy("cfName");

# #create_paramId_def();

# $query="select distinct edition,centre.abbreviation,param_id,param.shortName from param,grib_encoding,centre where
#  param.hide_def=0 and
#  param.id=grib_encoding.param_id and
#  centre.id=grib_encoding.centre_id and
#  shortName!='~' order by abbreviation,edition,param.o,param.id,shortName";


# #select distinct edition,centre.abbreviation,param_id,param.shortName
# #from param,grib_encoding,grib,centre where param.hide_def=0 and param.id=grib.param_id and
# #centre.id=grib_encoding.centre_id and shortName!='~'
# #order by centre,edition,param.o,param_id";

# #create_def("shortName",$query);

# $query="select distinct edition,centre.abbreviation,param_id,param.name
# from param,grib,centre where param.hide_def=0 and param.id=grib.param_id and
# centre.id=grib.centre and shortName!='~'
# order by centre,edition,param.o,param_id";

# #create_def("name",$query);

# $query="select distinct edition,centre.abbreviation,param_id,units.name
# from param,grib,centre,units where param.hide_def=0 and param.id=grib.param_id and units.id=param.units_id
# and centre.id=grib.centre and shortName!='~'
# order by centre,edition,param.o,param_id";

# #create_def("units",$query);

