# This code is part of Perl distribution Log-Report version 1.45.
# The POD got stripped from this file by OODoc version 3.06.
# For contributors see file ChangeLog.

# This software is copyright (c) 2007-2026 by Mark Overmeer.

# This is free software; you can redistribute it and/or modify it under
# the same terms as the Perl 5 programming language system itself.
# SPDX-License-Identifier: Artistic-1.0-Perl OR GPL-1.0-or-later


package Log::Report;{
our $VERSION = '1.45';
}

use base 'Exporter';

use warnings;
use strict;

use List::Util         qw/first/;
use Scalar::Util       qw/blessed/;

use Log::Report::Util;
my $lrm = 'Log::Report::Message';

### if you change anything here, you also have to change Log::Report::Minimal
my @make_msg   = qw/__ __x __n __nx __xn N__ N__n N__w __p __px __np __npx/;
my @functions  = qw/report dispatcher try textdomain/;
my @reason_functions = qw/trace assert info notice warning mistake error fault alert failure panic/;

our @EXPORT_OK = (@make_msg, @functions, @reason_functions);

sub _whats_needed(); sub dispatcher($@); sub textdomain(@);
sub trace(@); sub assert(@); sub info(@); sub notice(@); sub warning(@);
sub mistake(@); sub error(@); sub fault(@); sub alert(@); sub failure(@);
sub panic(@);
sub __($); sub __x($@); sub __n($$$@); sub __nx($$$@); sub __xn($$$@);
sub N__($); sub N__n($$); sub N__w(@);
sub __p($$); sub __px($$@); sub __np($$$$); sub __npx($$$$@);

#
# Some initiations
#

my $reporter     = {};
my $default_mode = 0;
my @nested_tries;

# we can only load these after Log::Report has compiled, because
# they use this module themselves as well.

require Log::Report::Die;
require Log::Report::Domain;
require Log::Report::Message;
require Log::Report::Exception;
require Log::Report::Dispatcher;
require Log::Report::Dispatcher::Try;

textdomain 'log-report';

my $default_dispatcher = dispatcher PERL => 'default', accept => 'NOTICE-';

#--------------------

sub report($@)
{	my $opts = ref $_[0] eq 'HASH' ? +{ %{ (shift) } } : {};
	my ($reason, $message) = (shift, shift);

	my $stop = exists $opts->{is_fatal} ? $opts->{is_fatal} : is_fatal $reason;
	my $try  = $nested_tries[-1];  # WARNING: overloaded boolean, use 'defined'

	my @disp;
	if(defined $try)
	{	push @disp, @{$reporter->{needs}{$reason} || []}
			unless $stop || $try->hides($reason);

		push @disp, $try
			if $try->needs($reason) || $opts->{is_fatal};
	}
	else
	{	@disp = @{$reporter->{needs}{$reason} || []};
	}

	is_reason $reason
		or error __x"token '{token UNKNOWN}' not recognized as reason.", token => $reason;

	# return when no-one needs it: skip unused trace() fast!
	@disp || $stop
		or return;

	my $to = delete $opts->{to};
	if($to)
	{	# explicit destination, still disp may not need it.
		if(ref $to eq 'ARRAY')
		{	my %disp = map +($_->name => $_), @disp;
			@disp	 = grep defined, @disp{@$to};
		}
		else
		{	@disp	 = grep $_->name eq $to, @disp;
		}
		push @disp, $try if defined $try;

		@disp || $stop
			or return;
	}

	unless(Log::Report::Dispatcher->can('collectLocation'))
	{	# internal Log::Report error can result in "deep recursions".
		eval "require Carp"; Carp::confess($message);
	}
	$opts->{location} ||= Log::Report::Dispatcher->collectLocation;

	my $exception;
	if(!blessed $message)
	{	# untranslated message into object
		@_%2 and error __x"odd length parameter list with '{msg}'.", msg => $message;
		$message   = $lrm->new(_prepend => $message, @_);
	}
	elsif($message->isa('Log::Report::Exception'))
	{	$exception = $message;
		$message   = $exception->message;
	}
	elsif($message->isa('Log::Report::Message'))
	{	@_==0 or error __x"a message object is reported with more parameters.";
	}
	else
	{	# foreign object
		my $text = "$message";  # hope stringification is overloaded
		$text	=~ s/\s*$//gs;
		@_%2 and error __x"odd length parameter list with object '{msg}'.", msg => $text;
		$message = $lrm->new(_prepend => $text, @_);
	}

	$message->to($to) if $to;  # overrule destination of message
	if(my $disp_names = $message->to)
	{	my %select = map +($_ => 1), ref $disp_names eq 'ARRAY' ? @$disp_names : $disp_names;
		@disp = grep $select{$_->name}, @disp;
		push @disp, $try if defined $try && $select{try};
		@disp or return;
	}

	$opts->{errno} //= $message->errno //
		(use_errno($reason) ? ($!+0 || $?) : is_fatal($reason) ? 1 : undef);

	my $domain = $message->domain;
	if(my $filters = $reporter->{filters})
	{
	  DISPATCHER:
		foreach my $d (@disp)
		{	my ($r, $m) = ($reason, $message);
			foreach my $filter (@$filters)
			{	next if keys %{$filter->[1]} && !$filter->[1]{$d->name};
				($r, $m) = $filter->[0]->($d, $opts, $r, $m, $domain);
				$r or next DISPATCHER;
			}
			$d->log($opts, $r, $m, $domain);
		}
	}
	else
	{	$_->log($opts, $reason, $message, $domain) for @disp;
	}

	if($stop)
	{	# $^S = $EXCEPTIONS_BEING_CAUGHT; parse: undef, eval: 1, else 0
		(defined($^S) ? $^S : 1) or exit($opts->{errno} || 0);

		$! = $opts->{errno} || 0;
		$@ = $exception || Log::Report::Exception->new(report_opts => $opts, reason => $reason, message => $message);
		die;   # $@->PROPAGATE() will be called, some eval will catch this
	}

	@disp;
}


my %disp_actions = map +($_ => 1), qw/close find list disable enable mode needs filter active-try do-not-reopen/;
my $reopen_disp  = 1;

sub dispatcher($@)
{	if(! $disp_actions{$_[0]})
	{	my ($type, $name) = (shift, shift);

		# old dispatcher with same name will be closed in DESTROY
		my $disps = $reporter->{dispatchers};

		if(!$reopen_disp)
		{	my $has = first {$_->name eq $name} @$disps;
			if(defined $has && $has ne $default_dispatcher)
			{	my $default = $name eq 'default' ? ' (refreshing configuration instead)' : '';
				trace "not reopening $name$default.";
				return $has;
			}
		}

		my @disps = grep $_->name ne $name, @$disps;
		trace "reopening dispatcher $name" if @disps != @$disps;

		my $disp = Log::Report::Dispatcher ->new($type, $name, mode => $default_mode, @_);

		push @disps, $disp if $disp;
		$reporter->{dispatchers} = \@disps;

		_whats_needed;
		return $disp ? ($disp) : undef;
	}

	my $command = shift;
	if($command eq 'list')
	{	@_ and mistake __"the 'list' sub-command doesn't expect additional parameters.";
		my @disp = @{$reporter->{dispatchers}};
		push @disp, $nested_tries[-1] if @nested_tries;
		return @disp;
	}
	if($command eq 'needs')
	{	my $reason = shift || 'undef';
		is_reason $reason
			or error __x"the 'needs' sub-command parameter '{need}' is not a reason.", need => $reason;
		my $disp = $reporter->{needs}{$reason};
		return $disp ? @$disp : ();
	}
	if($command eq 'filter')
	{	my $code = shift;
		ref $code eq 'CODE'
			or error __"the 'filter' sub-command needs a CODE reference.";
		my %names = map +($_ => 1), @_;
		push @{$reporter->{filters}}, [ $code, \%names ];
		return ();
	}
	if($command eq 'active-try')
	{	return $nested_tries[-1];
	}
	if($command eq 'do-not-reopen')
	{	$reopen_disp = 0;
		return ();
	}

	my $mode	 = $command eq 'mode' ? shift : undef;

	my $all_disp = @_==1 && $_[0] eq 'ALL';
	my $disps    = $reporter->{dispatchers};
	my @disps;
	if($all_disp) { @disps = @$disps }
	else
	{	# take the dispatchers in the specified order.  Both lists
		# are small, so O(x²) is small enough
		for my $n (@_) { push @disps, grep $_->name eq $n, @$disps }
	}

	wantarray || !defined wantarray || @disps < 2
		or error __"only one dispatcher name accepted in SCALAR context.";

	if($command eq 'close')
	{	my %kill = map +($_->name => 1), @disps;
		@$disps  = grep !$kill{$_->name}, @$disps;

		$_->close for @disps;
	}
	elsif($command eq 'enable')  { $_->_disabled(0) for @disps }
	elsif($command eq 'disable') { $_->_disabled(1) for @disps }
	elsif($command eq 'mode')
	{	Log::Report::Dispatcher->defaultMode($mode) if $all_disp;
		$_->_set_mode($mode) for @disps;
	}

	# find does require reinventarization
	_whats_needed if $command ne 'find';

	wantarray ? @disps : $disps[0];
}

END { $_->close for @{$reporter->{dispatchers}} }

# _whats_needed
# Investigate from all dispatchers which reasons will need to be
# passed on. After dispatchers are added, enabled, or disabled,
# this method shall be called to re-investigate the back-ends.

sub _whats_needed()
{	my %needs;
	foreach my $disp (@{$reporter->{dispatchers}})
	{	push @{$needs{$_}}, $disp for $disp->needs;
	}
	$reporter->{needs} = \%needs;
}


sub try(&@)
{	my $code = shift;

	@_ % 2 and report +{ location => [caller 0] },
		PANIC => __"odd length parameter list for try(): forgot the terminating ';'?";

	unshift @_, mode => 'DEBUG'
		if $reporter->{needs}{TRACE};

	my $disp = Log::Report::Dispatcher::Try->new(TRY => 'try', @_);

	# L::R native messages are logged directly in $disp via @nested_tries
	push @nested_tries, $disp;

	# user's __DIE__ handlers would frustrate the exception mechanism
	local $SIG{__DIE__};

	my ($ret, @ret);
	if(!defined wantarray)  { eval { $code->() } } # VOID   context
	elsif(wantarray) { @ret = eval { $code->() } } # LIST   context
	else			 { $ret = eval { $code->() } } # SCALAR context

	my $err  = $@;
	pop @nested_tries;   # remove $disp

	my $is_exception = blessed $err && $err->isa('Log::Report::Exception');
	if(!$is_exception && $err && !$disp->wasFatal)
	{	# Decode errors which do not origin from Log::Report reports
		# Native exceptions are already logged.
		my ($opts, $reason, $text, $tags) = blessed $err
		  ? Log::Report::Die::exception_decode($err)
		  : Log::Report::Die::die_decode($err, on_die => $disp->die2reason);

		$disp->log($opts, $reason, __x($text, _tags => $tags));
	}

	$disp->died($err)
		if $is_exception ? $err->isFatal : $err;

	$@ = $disp;

	wantarray ? @ret : $ret;
}

#--------------------

sub trace(@)   {report TRACE   => @_}
sub assert(@)  {report ASSERT  => @_}
sub info(@)    {report INFO    => @_}
sub notice(@)  {report NOTICE  => @_}
sub warning(@) {report WARNING => @_}
sub mistake(@) {report MISTAKE => @_}
sub error(@)   {report ERROR   => @_}
sub fault(@)   {report FAULT   => @_}
sub alert(@)   {report ALERT   => @_}
sub failure(@) {report FAILURE => @_}
sub panic(@)   {report PANIC   => @_}

#--------------------


sub __($)
{	my ($cpkg, $fn, $linenr) = caller;
	$lrm->new(_msgid  => shift, _domain => pkg2domain($cpkg), _use => "$fn line $linenr");
}


# label "msgid" added before first argument
sub __x($@)
{	my ($cpkg, $fn, $linenr) = caller;
	@_%2 or error __x"even length parameter list for __x at {where}", where => "$fn line $linenr";

	my $msgid = shift;
	$lrm->new(_msgid => $msgid, _expand => 1, _domain => pkg2domain($cpkg), _use => "$fn line $linenr", @_);
}


sub __n($$$@)
{	my ($single, $plural, $count) = (shift, shift, shift);
	my ($cpkg, $fn, $linenr) = caller;
	$lrm->new(_msgid => $single, _plural => $plural, _count => $count, _domain => pkg2domain($cpkg),
		_use => "$fn line $linenr" , @_);
}


sub __nx($$$@)
{	my ($single, $plural, $count) = (shift, shift, shift);
	my ($cpkg, $fn, $linenr) = caller;
	$lrm->new(_msgid => $single, _plural => $plural, _count => $count, _expand => 1,
		_domain => pkg2domain($cpkg), _use => "$fn line $linenr", @_);
}


sub __xn($$$@)   # repeated for prototype
{	my ($single, $plural, $count) = (shift, shift, shift);
	my ($cpkg, $fn, $linenr) = caller;
	$lrm->new(_msgid => $single, _plural => $plural, _count => $count, _expand => 1,
		_domain => pkg2domain($cpkg), _use => "$fn line $linenr", @_);
}


sub N__($) { $_[0] }


sub N__n($$) {@_}


sub N__w(@) {split " ", $_[0]}


#--------------------

sub __p($$) { __($_[0])->_msgctxt($_[1]) }

sub __px($$@)
{	my ($ctxt, $msgid) = (shift, shift);
	__x($msgid, @_)->_msgctxt($ctxt);
}

sub __np($$$$)
{	my ($ctxt, $msgid, $plural, $count) = @_;
	__n($msgid, $msgid, $plural, $count)->_msgctxt($ctxt);
}

sub __npx($$$$@)
{	my ($ctxt, $msgid, $plural, $count) = splice @_, 0, 4;
	__nx($msgid, $msgid, $plural, $count, @_)->_msgctxt($ctxt);
}

#--------------------

sub import(@)
{	my $class = shift;

	if($INC{'Log/Report/Minimal.pm'})
	{	my ($pkg, $fn, $line) = caller;   # do not report on LR:: modules
		if(index($pkg, 'Log::Report::') != 0)
		{	# @pkgs empty during release testings of L::R distributions
			my @pkgs = Log::Report::Optional->usedBy;
			die "Log::Report loaded too late in $fn line $line, put in $pkg before ", (join ',', @pkgs) if @pkgs;
		}
	}

	my $to_level   = ($_[0] && $_[0] =~ m/^\+\d+$/ ? shift : undef) || 0;
	my $textdomain = @_%2 ? shift : undef;
	my %opts       = @_;

	my ($pkg, $fn, $linenr) = caller $to_level;

	### Log::Report options

	if(exists $opts{mode})
	{	$default_mode = delete $opts{mode} || 0;
		Log::Report::Dispatcher->defaultMode($default_mode);
		dispatcher mode => $default_mode, 'ALL';
	}

	my @export;
	if(my $in = delete $opts{import})
	{	push @export, ref $in eq 'ARRAY' ? @$in : $in;
	}
	else
	{	push @export, @functions, @make_msg;

		my $syntax = delete $opts{syntax} || 'SHORT';
		if($syntax eq 'SHORT')
		{	push @export, @reason_functions
		}
		elsif($syntax ne 'REPORT' && $syntax ne 'LONG')
		{	error __x"syntax flag must be either SHORT or REPORT, not `{flag}' in {fn} line {line}", flag => $syntax, fn => $fn, line => $linenr;
		}
	}

	if(my $msg_class = delete $opts{message_class})
	{	$msg_class->isa($lrm)
			or error __x"message_class {class} does not extend {base}", base => $lrm, class => $msg_class;
		$lrm = $msg_class;
	}

	$class->export_to_level(1+$to_level, undef, @export);

	### Log::Report::Domain configuration

	if(defined $textdomain)
	{	pkg2domain $pkg, $textdomain, $fn, $linenr;
		my $domain = textdomain $textdomain;
		$domain->configure(%opts, where => [$pkg, $fn, $linenr ]) if keys %opts;
	}
	elsif(keys %opts)
	{	error __x"no domain for configuration options in {fn} line {line}", fn => $fn, line => $linenr;
	}
}

# deprecated, since we have a ::Domain object in 1.00
sub translator($;$$$$)
{	# replaced by (textdomain $domain)->configure

	my ($class, $name) = (shift, shift);
	my $domain = textdomain $name
		or error __x"textdomain `{domain}' for translator not defined", domain => $name;

	@_ or return $domain->translator;

	my ($translator, $pkg, $fn, $line) = @_;
	($pkg, $fn, $line) = caller   # direct call, not via import
		unless defined $pkg;

	$translator->isa('Log::Report::Translator')
		or error __x"translator must be a {pkg} object for {domain}", pkg => 'Log::Report::Translator', domain => $name;

	$domain->configure(translator => $translator, where => [$pkg, $fn, $line]);
}


sub textdomain(@)
{
	if(@_==1 && blessed $_[0])
	{	my $domain = shift;
		$domain->isa('Log::Report::Domain') or panic;
		return $reporter->{textdomains}{$domain->name} = $domain;
	}

	if(@_==2)
	{	# used for 'maintenance' and testing
		return delete $reporter->{textdomains}{$_[0]} if $_[1] eq 'DELETE';
		return $reporter->{textdomains}{$_[0]} if $_[1] eq 'EXISTS';
	}

	my $name   = (@_%2 ? shift : pkg2domain((caller)[0])) || 'default';
	my $domain = $reporter->{textdomains}{$name} ||= Log::Report::Domain->new(name => $name);
	$domain->configure(@_, where => [caller]) if @_;
	$domain;
}

#--------------------

sub needs(@)
{	my $thing = shift;
	my $self  = ref $thing ? $thing : $reporter;
	first {$self->{needs}{$_}} @_;
}

#--------------------

1;
