#!/usr/bin/perl -w
# NAME: findfile.pl
# AIM: Given a file name, and a root directory, search for the file, and out FULL PATH if found
# If no root directory given, use current work directory
# 2019-12-26 - review - add recursive depth limit, like '-d 1', add info, esp. if no find...
# 2013-07-07 - Initial cut...
use strict;
use warnings;
use File::Basename;  # split path ($name,$dir,$ext) = fileparse($file [, qr/\.[^.]*/] )
use File::Spec; # File::Spec->rel2abs($rel); # we are IN the a directory, get ABSOLUTE form
use Cwd;
my $os = $^O;
my $perl_dir = '/home/geoff/bin';
my $PATH_SEP = '/';
my $temp_dir = '/tmp';
if ($os =~ /win/i) {
    $perl_dir = 'C:\GTools\perl';
    $temp_dir = $perl_dir;
    $PATH_SEP = "\\";
}
unshift(@INC, $perl_dir);
require 'lib_utils.pl' or die "Unable to load 'lib_utils.pl' Check paths in \@INC...\n";
# log file stuff
our ($LF);
my $pgmname = $0;
if ($pgmname =~ /(\\|\/)/) {
    my @tmpsp = split(/(\\|\/)/,$pgmname);
    $pgmname = $tmpsp[-1];
}
my $outfile = $temp_dir.$PATH_SEP."temp.$pgmname.txt";
open_log($outfile);

# user variables
my $VERS = "0.0.1 2013-03-17";
my $load_log = 0;
my $in_file = '';
my $verbosity = 0;
my $out_file = '';
my $root_dir = '';
my $max_depth = 0;
# ### DEBUG ###
my $debug_on = 0;
my $def_file = 'transform.h';
my $def_root = 'C:\FG\18\geomview';

### program variables
my @warnings = ();
my $cwd = cwd();
my $dirs_cnt = 0;
my $file_cnt = 0;
my @found_files = ();
my @like_files = ();

sub VERB1() { return $verbosity >= 1; }
sub VERB2() { return $verbosity >= 2; }
sub VERB5() { return $verbosity >= 5; }
sub VERB9() { return $verbosity >= 9; }

sub show_warnings($) {
    my ($val) = @_;
    if (@warnings) {
        prt( "\nGot ".scalar @warnings." WARNINGS...\n" );
        foreach my $itm (@warnings) {
           prt("$itm\n");
        }
        prt("\n");
    } else {
        prt( "\nNo warnings issued.\n\n" ) if (VERB9());
    }
}

sub pgm_exit($$) {
    my ($val,$msg) = @_;
    if (length($msg)) {
        $msg .= "\n" if (!($msg =~ /\n$/));
        prt($msg);
    }
    show_warnings($val);
    close_log($outfile,$load_log);
    exit($val);
}


sub prtw($) {
   my ($tx) = shift;
   $tx =~ s/\n$//;
   prt("$tx\n");
   push(@warnings,$tx);
}

sub process_in_file($) {
    my ($inf) = @_;
    if (! open INF, "<$inf") {
        pgm_exit(1,"ERROR: Unable to open file [$inf]\n"); 
    }
    my @lines = <INF>;
    close INF;
    my $lncnt = scalar @lines;
    prt("Processing $lncnt lines, from [$inf]...\n");
    my ($line,$inc,$lnn);
    $lnn = 0;
    foreach $line (@lines) {
        chomp $line;
        $lnn++;
        if ($line =~ /\s*#\s*include\s+(.+)$/) {
            $inc = $1;
            prt("$lnn: $inc\n");
        }
    }
}

sub process_in_dir($$);

sub process_in_dir($$) {
    my ($dir,$dep) = @_;
    if ($max_depth) {
        return if ($dep > $max_depth);
    }
    if (!opendir(DIR,$dir)) {
        prtw("WARNING: Unable to open directory [$dir]\n");
        return;
    }
    my @files = readdir(DIR);
    closedir(DIR);
    $dirs_cnt++;
    my ($file,$ff,$cnt);
    $cnt = scalar @files;
    prt("[v9] Processing dir '$dir', depth $dep of $max_depth, $cnt items...\n") if (VERB9());
    ut_fix_directory(\$dir);
    my @dirs = ();
    my $do_dirs = 1;
    foreach $file (@files) {
        next if ($file eq '.');
        next if ($file eq '..');
        $ff = $dir.$file;
        if (-d $ff) {
            push(@dirs,$ff);
        } elsif (-f $ff) {
            $file_cnt++;
            if ($file eq $in_file) {
                push(@found_files,$ff);
            } elsif ($file =~ /^$in_file$/) {
                push(@found_files,$ff);
            } elsif ($file =~ /$in_file/i) {
                push(@like_files,$ff);
            }
        } else {
            prtw("WARNING: WHAT IS THIS? [$ff] [$file]\n");
        }
    }
    foreach $dir (@dirs) {
        process_in_dir($dir,($dep + 1));
    }
}


#########################################
### MAIN ###
parse_args(@ARGV);
process_in_dir($root_dir,0);
###process_in_file($in_file);
my $res = scalar @found_files;
my $res2 = scalar @like_files;
if ($res) {
    prt("Found $res files...\n") if (VERB5());
    my $txt = join("\n",@found_files)."\n";
    if (length($out_file)) {
        write2file($txt,$out_file);
        prt("Results written to [$out_file]\n") if (VERB1());
    } else {
        prt($txt);
    }
} else {
    prt("No find of [$in_file] in [$root_dir], scanned ".get_nn($dirs_cnt)." dirs, ".get_nn($file_cnt)." files...\n");
    if ($res2) {
        my $txt2 = join("\n",@like_files)."\n";
        prt("But found $res2 files, with '$in_file' in their name -\n");
        prt("$txt2");
    }
}
pgm_exit($res,"");
########################################

sub need_arg {
    my ($arg,@av) = @_;
    pgm_exit(1,"ERROR: [$arg] must have a following argument!\n") if (!@av);
}

sub parse_args {
    my (@av) = @_;
    my ($arg,$sarg);
    while (@av) {
        $arg = $av[0];
        if ($arg =~ /^-/) {
            $sarg = substr($arg,1);
            $sarg = substr($sarg,1) while ($sarg =~ /^-/);
            if (($sarg =~ /^h/i)||($sarg eq '?')) {
                give_help();
                pgm_exit(0,"Help exit(0)");
            } elsif ($sarg =~ /^v/) {
                if ($sarg =~ /^v.*(\d+)$/) {
                    $verbosity = $1;
                } else {
                    while ($sarg =~ /^v/) {
                        $verbosity++;
                        $sarg = substr($sarg,1);
                    }
                }
                prt("Verbosity = $verbosity\n") if (VERB1());
            } elsif ($sarg =~ /^l/) {
                if ($sarg =~ /^ll/) {
                    $load_log = 2;
                } else {
                    $load_log = 1;
                }
                prt("Set to load log at end. ($load_log)\n") if (VERB1());
            } elsif ($sarg =~ /^o/) {
                need_arg(@av);
                shift @av;
                $sarg = $av[0];
                $out_file = $sarg;
                prt("Set out file to [$out_file].\n") if (VERB1());
            } elsif ($sarg =~ /^r/) {
                need_arg(@av);
                shift @av;
                $sarg = $av[0];
                $root_dir = $sarg;
                if (! -d $root_dir) {
                    pgm_exit(1,"ERROR: Root directory [$root_dir] does NOT exist!\n");
                }
                prt("Set root directory [$root_dir].\n") if (VERB1());
            } elsif ($sarg =~ /^d/) {
                need_arg(@av);
                shift @av;
                $sarg = $av[0];
                if ($sarg =~ /^\d+$/) {
                    $max_depth = $sarg;
                    prt("Set max. depth to [$max_depth].\n") if (VERB1());
                } else {
                    pgm_exit(1,"ERROR: Invalid argument [$sarg]! Must be an integer following $arg. Try -?\n");
                }
            } else {
                pgm_exit(1,"ERROR: Invalid argument [$arg]! Try -?\n");
            }
        } else {
            $in_file = $arg;
            prt("Set input to [$in_file]\n") if (VERB1());
        }
        shift @av;
    }

    if ($debug_on) {
        prtw("WARNING: DEBUG is ON!\n");
        if (length($in_file) ==  0) {
            $in_file = $def_file;
            prt("Set DEFAULT input to [$in_file]\n");
        }
        if (length($root_dir) ==  0) {
            $root_dir = $def_root;
            prt("Set DEFAULT root to [$root_dir]\n");
        }

    }
    if (length($in_file) ==  0) {
        pgm_exit(1,"ERROR: No input filename, to find, found in command!\n");
    }

    #if (! -f $in_file) {
    #    pgm_exit(1,"ERROR: Unable to find in file [$in_file]! Check name, location...\n");
    #}
    if (length($root_dir) ==  0) {
        $root_dir = File::Spec->rel2abs('.');
        prt("Set current directory as root [$root_dir]\n") if (VERB1());
    }
}

sub give_help {
    prt("$pgmname: version $VERS\n");
    prt("Usage: $pgmname [options] in-file\n");
    prt("Options:\n");
    prt(" --help  (-h or -?) = This help, and exit 0.\n");
    prt(" --verb[n]     (-v) = Bump [or set] verbosity. def=$verbosity\n");
    prt(" --load        (-l) = Load LOG at end. ($outfile)\n");
    prt(" --out <file>  (-o) = Write output to this file.\n");
    prt(" --root <dir>  (-r) = Root directory to start search.\n");
    prt("       If no root given then will use current work directory.\n");

}

# eof - template.pl