# -*- cperl -*-

# NOTE: backend can also be tested in model_test.d

use ExtUtils::testlib;
use Test::More;
use Test::Memory::Cycle;
use Config::Model;
use File::Path;
use File::Copy;
use Data::Dumper;
use Log::Log4perl qw(:easy);
use Test::Differences;
use Test::File::Contents;

use warnings;
no warnings qw(once);

use strict;

my $arg = shift || '';

my $trace = $arg =~ /t/ ? 1 : 0;
my $log   = $arg =~ /l/ ? 1 : 0;

my $home = $ENV{HOME} || "";
my $log4perl_user_conf_file = "$home/.log4config-model";

if ( $log and -e $log4perl_user_conf_file ) {
    Log::Log4perl::init($log4perl_user_conf_file);
}
else {
    Log::Log4perl->easy_init( $log ? $WARN : $ERROR );
}
Config::Model::Exception::Any->Trace(1) if $arg =~ /e/;

ok( 1, "compiled" );

# pseudo root where config files are written by config-model
my $wr_root = 'wr_root_p/backend-ini-section-map';

my $head = << 'EOH';
## This file was written by cme command.
## You can run 'cme edit <application>' to modify this file.
## Run 'cme list' to get the list of applications available on your system
## You may also modify the content of this file with your favorite editor.
EOH

my @below_data = split /\n/, << 'EOD2' ;
[Low]
foo = bar

[Section1]
source = 1

[Section2]
source = 2
packages = g++-4.2-arm-linux-gnu linux-libc-dev-arm-cross

[Empty]
EOD2

my $w_file_below = join( "\n", $head, '', map { lc } @below_data[ 3 .. 9, 0 .. 2 ] );

# set_up data
my @general_data = split /\n/, << 'EOD1' ;
[General]
foo = bar

[Section1]
source = 1

[Section2]
source = 2
packages = g++-4.2-arm-linux-gnu linux-libc-dev-arm-cross

[Empty]
EOD1

my $w_file_general = join( "\n", $head, map { lc } @general_data[ 0 .. 9 ] );

# change delimiter comments
my %test_setup = (
    SectionMapTop => [ \@general_data, 'general', $w_file_general ],
    SectionMap    => [ \@below_data,   'below',   $w_file_below ],
);

my $model = Config::Model->new();

$model->create_config_class(
    'name'    => 'Section',
    'element' => [
        'source',
        {
            'value_type' => 'uniline',
            'type'       => 'leaf'
        },
        'packages',
        {
            'cargo' => {
                'value_type' => 'uniline',
                'type'       => 'leaf'
            },
            'type' => 'list'
        },

    ],
);

$model->create_config_class(
    'name'    => 'Below',
    'element' => [
        foo => { qw/type leaf value_type uniline/, },
    ],
);

$model->create_config_class(
    name          => 'SectionMapTop',
    'rw_config' => {
        'section_map'         => { 'general' => '!' },
        'backend'             => 'ini_file',
        'split_list_value'    => '\\s+',
        'join_list_value'     => ' ',
        'store_class_in_hash' => 'sections',
        force_lc_section      => 1,
    },

    element => [
        'sections',
        {
            'cargo' => {
                'type'              => 'node',
                'config_class_name' => 'Section'
            },
            'type'       => 'hash',
            'index_type' => 'string'
        },

        foo => { qw/type leaf value_type uniline/, },
    ] );

$model->create_config_class(
    name          => 'SectionMap',
    'rw_config' => {
        'section_map'         => { 'low' => 'below' },
        'backend'             => 'ini_file',
        'split_list_value'    => '\\s+',
        'join_list_value'     => ' ',
        'store_class_in_hash' => 'sections',
        force_lc_section      => 1,
    },

    element => [
        'sections',
        {
            'cargo' => {
                'type'              => 'node',
                'config_class_name' => 'Section'
            },
            'type'       => 'hash',
            'index_type' => 'string'
        },

        below => { qw/type node config_class_name Below/, },
        foo   => { qw/type leaf value_type uniline/, },
    ] );

# cleanup before tests
rmtree($wr_root);

foreach my $test_class ( sort keys %test_setup ) {
    my @orig         = @{ $test_setup{$test_class}[0] };
    my $test_path    = $test_setup{$test_class}[1];
    my $written_file = $test_setup{$test_class}[2];

    ok( 1, "Starting $test_class tests in $test_path dir" );

    my $test1         = 'ini1';
    my $wr_dir        = "$wr_root/$test_path/$test1";
    my $conf_file     = "/etc/test.ini";
    my $abs_conf_file = "$wr_dir$conf_file";

    mkpath( $wr_dir . '/etc', { mode => oct(755) } )
        || die "can't mkpath: $!";
    open my $conf, '>', $abs_conf_file || die "can't open $abs_conf_file: $!";
    print $conf map { "$_\n" } @orig;
    close $conf;

    my $i_test = $model->instance(
        instance_name   => $test_path,
        root_class_name => $test_class,
        root_dir        => $wr_dir,
        config_file     => $conf_file,
    );

    ok( $i_test, "Created $test_class instance" );

    my $i_root = $i_test->config_root;

    my $orig = $i_root->dump_tree;
    print $orig if $trace;
    is( $i_root->needs_save, 0, "check data does not need to be saved" );

    is( $i_root->grab_value("sections:section2 packages:0"),
        "g++-4.2-arm-linux-gnu", "check auto-split 1/2" );
    is( $i_root->grab_value("sections:section2 packages:1"),
        "linux-libc-dev-arm-cross", "check auto-split 2/2" );

    # force write back
    $i_root->needs_save(1);

    $i_test->write_back( config_file => $conf_file );
    ok( 1, "IniFile write back done" );

    my $ini_file = $wr_dir . '/etc/test.ini';
    ok( -e $ini_file, "check that config file $ini_file was written" );

    file_contents_eq_or_diff $ini_file, $written_file, "check file $ini_file content";

    # create another instance to read the IniFile that was just written
    my $wr_dir2 = "$wr_root/$test_path/ini2";
    mkpath( $wr_dir2 . '/etc', { mode => oct(755) } ) || die "can't mkpath: $!";
    copy( $wr_dir . '/etc/test.ini', $wr_dir2 . '/etc/' )
        or die "can't copy from test1 to test2: $!";

    my $i2_test = $model->instance(
        instance_name   => $test_path . '2',
        root_class_name => $test_class,
        root_dir        => $wr_dir2,
        config_file     => $conf_file,
    );

    ok( $i2_test, "Created instance" );

    my $i2_root = $i2_test->config_root;

    my $p2_dump = $i2_root->dump_tree;

    $i_root->load('sections~empty');
    my $orig_fixed = $i_root->dump_tree;

    eq_or_diff(
        [ split /\n/, $p2_dump ],
        [ split /\n/, $orig_fixed ],
        "compare original data with 2nd instance data"
    );

}
memory_cycle_ok($model);

done_testing;