#!/usr/bin/perl
# 
# This is a tool that purges hosts or Anvil! systems from the ScanCore databases.
# 

use strict;
use warnings;
use Anvil::Tools;
use Data::Dumper;

$| = 1;

my $THIS_FILE           =  ($0 =~ /^.*\/(.*)$/)[0];
my $running_directory   =  ($0 =~ /^(.*?)\/$THIS_FILE$/)[0];
if (($running_directory =~ /^\./) && ($ENV{PWD}))
{
	$running_directory =~ s/^\./$ENV{PWD}/;
}

my $anvil = Anvil::Tools->new();


$anvil->Database->connect({check_for_resync => 1});
$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 2, secure => 0, key => "log_0132"});
if (not $anvil->data->{sys}{database}{connections})
{
	# No databases, exit.
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, 'print' => 1, priority => "err", key => "error_0003"});
	$anvil->nice_exit({exit_code => 1});
}

$anvil->data->{switches}{'anvil'} = "";
$anvil->data->{switches}{'host'}  = "";
$anvil->data->{switches}{'y'}     = "";
$anvil->data->{switches}{'yes'}   = "";
$anvil->Get->switches();
if ((not $anvil->data->{switches}{'anvil'}) && (not $anvil->data->{switches}{'host'}))
{
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0240"});
	$anvil->nice_exit({exit_code => 1});
}
$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
	"switches::anvil" => $anvil->data->{switches}{'anvil'},
	"switches::host"  => $anvil->data->{switches}{'host'},
	"switches::y"     => $anvil->data->{switches}{'y'},
	"switches::yes"   => $anvil->data->{switches}{'yes'},
}});

$anvil->data->{purge}{anvil_uuid} = "";
$anvil->data->{purge}{anvil_name} = "";
$anvil->data->{purge}{host_uuid}  = "";
$anvil->data->{purge}{host_name}  = "";
$anvil->data->{purge}{hosts}      = [];
$anvil->Database->get_anvils();
$anvil->Database->get_hosts({include_deleted => 1});
my $vacuum = 0;
if ($anvil->data->{switches}{'anvil'})
{
	my $anvil_name = "";
	my $anvil_uuid = "";
	if ($anvil->Validate->uuid({uuid => $anvil->data->{switches}{'anvil'}}))
	{
		$anvil_uuid = $anvil->data->{switches}{'anvil'}; 
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { anvil_uuid => $anvil_uuid }});
		
		# Convert it to an Anvil! name.
		$anvil->data->{purge}{anvil_uuid} = $anvil_uuid;
		$anvil->data->{purge}{anvil_name} = exists $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid} ? $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_name} : "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			"purge::anvil_uuid" => $anvil->data->{purge}{anvil_uuid},
			"purge::anvil_name" => $anvil->data->{purge}{anvil_name},
		}});
		
		if (not $anvil->data->{purge}{anvil_name})
		{
			# Bad anvil_uuid
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "error_0302", priority => "err", variables => { anvil_uuid => $anvil->data->{switches}{'anvil'} }});
			$anvil->nice_exit({exit_code => 1});
		}
	}
	else
	{
		# Look for the name.
		$anvil_name = $anvil->data->{switches}{'anvil'};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { anvil_name => $anvil_name }});
		
		$anvil->data->{purge}{anvil_name} = $anvil_name;
		$anvil->data->{purge}{anvil_uuid} = exists $anvil->data->{anvils}{anvil_name}{$anvil_name} ? $anvil->data->{anvils}{anvil_name}{$anvil_name}{anvil_uuid} : "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			"purge::anvil_uuid" => $anvil->data->{purge}{anvil_uuid},
			"purge::anvil_name" => $anvil->data->{purge}{anvil_name},
		}});
		
		if (not $anvil->data->{purge}{anvil_uuid})
		{
			# Bad anvil name.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "error_0302", priority => "err", variables => { anvil_uuid => $anvil->data->{switches}{'anvil'} }});
			$anvil->nice_exit({exit_code => 1});
		}
	}
	
	# Load the list of hosts.
	$anvil_uuid = $anvil->data->{purge}{anvil_uuid};
	push @{$anvil->data->{purge}{hosts}}, $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node1_host_uuid};
	push @{$anvil->data->{purge}{hosts}}, $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node2_host_uuid};
}
elsif($anvil->data->{switches}{'host'})
{
	my $host_uuid = "";
	my $host_name = "";
	if ($anvil->Validate->uuid({uuid => $anvil->data->{switches}{'host'}}))
	{
		$host_uuid = $anvil->data->{switches}{'host'}; 
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { host_uuid => $host_uuid }});
		
		# Convert it to an Anvil! name.
		$anvil->data->{purge}{host_uuid} = $host_uuid;
		$anvil->data->{purge}{host_name} = exists $anvil->data->{hosts}{host_uuid}{$host_uuid} ? $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name} : "";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			"purge::host_uuid" => $anvil->data->{purge}{host_uuid},
			"purge::host_name" => $anvil->data->{purge}{host_name},
		}});
		
		if (not $anvil->data->{purge}{host_name})
		{
			# Bad host_uuid
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "error_0303", priority => "err", variables => { host_uuid => $anvil->data->{switches}{'host'} }});
			$anvil->nice_exit({exit_code => 1});
		}
	}
	else
	{
		# Look for the name.
		$host_name = $anvil->data->{switches}{'host'};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { host_name => $host_name }});
		
		$anvil->data->{purge}{host_name} = $host_name;
		$anvil->data->{purge}{host_uuid} = $anvil->Get->host_uuid_from_name({host_name => $host_name});;
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			"purge::host_uuid" => $anvil->data->{purge}{host_uuid},
			"purge::host_name" => $anvil->data->{purge}{host_name},
		}});
		
		if (not $anvil->data->{purge}{host_uuid})
		{
			# Bad anvil name.
			$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "error_0303", priority => "err", variables => { host_uuid => $anvil->data->{switches}{'host'} }});
			$anvil->nice_exit({exit_code => 1});
		}
	}
	push @{$anvil->data->{purge}{hosts}}, $anvil->data->{purge}{host_uuid};
}
else
{
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => ""});
	$anvil->nice_exit({exit_code => 1});
}

# Ask to confirm.
if (($anvil->data->{switches}{'y'}) or ($anvil->data->{switches}{'yes'}))
{
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0241"});
}
else
{
	if ($anvil->data->{purge}{anvil_name})
	{
		# Show the Anvil! and member hosts.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0243", variables => {
			anvil_name => $anvil->data->{purge}{anvil_name},
			anvil_uuid => $anvil->data->{purge}{anvil_uuid},
		}});
		
		my $anvil_uuid      = $anvil->data->{purge}{anvil_uuid};
		my $anvil_name      = $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_name};
		my $node1_host_uuid = $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node1_host_uuid};
		my $node2_host_uuid = $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node2_host_uuid};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			anvil_uuid      => $anvil_uuid,
			anvil_name      => $anvil_name,
			node1_host_uuid => $node1_host_uuid, 
		}});
		
		# Node 1;
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0244", variables => {
			host_name => $anvil->data->{hosts}{host_uuid}{$node1_host_uuid}{host_name},
			host_uuid => $node1_host_uuid,
		}});
		
		# Node 2; 
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0244", variables => {
			host_name => $anvil->data->{hosts}{host_uuid}{$node2_host_uuid}{host_name},
			host_uuid => $node2_host_uuid,
		}});
		
		# DR, if set. 
	}
	else
	{
		# Ask the user to confirm the host deletion.
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0242", variables => {
			host_name => $anvil->data->{purge}{host_name},
			host_uuid => $anvil->data->{purge}{host_uuid},
		}});
	}
	print $anvil->Words->string({key => "message_0021"})." ";
	
	chomp(my $answer = <STDIN>);
	if ((lc($answer) ne "y") && (lc($answer) ne "yes"))
	{
		print "\n".$anvil->Words->string({key => "message_0022"})."\n\n";
		$anvil->nice_exit({exit_code => 1});
	}
}

# List all database tables in reverse order with X_host_uuid tables
$anvil->Database->find_host_uuid_columns({debug => 3, search_column => "host_uuid", main_table => "hosts"});

# For each host
foreach my $host_uuid (@{$anvil->data->{purge}{hosts}})
{
	my $host_name = $anvil->data->{hosts}{host_uuid}{$host_uuid}{host_name}; 
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0245", variables => {
		host_name => $host_name,
		host_uuid => $host_uuid,
	}});
	
	my $queries = [];
	foreach my $hash_ref (@{$anvil->data->{sys}{database}{uuid_tables}})
	{
		my $table            = $hash_ref->{table};
		my $host_uuid_column = $hash_ref->{host_uuid_column};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			's1:table'            => $table,
			's2:host_uuid_column' => $host_uuid_column, 
		}});
		
		if (($table eq "hosts") && ($anvil->data->{purge}{anvil_uuid}))
		{
			# Remove this host from the Anvil! 
			next if not $anvil->data->{purge}{anvil_uuid};
			my $anvil_uuid = $anvil->data->{purge}{anvil_uuid};
			my $host_key   = "";
			if ($host_uuid eq $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node1_host_uuid})
			{
				$host_key = "anvil_node1_host_uuid";
			}
			elsif ($host_uuid eq $anvil->data->{anvils}{anvil_uuid}{$anvil_uuid}{anvil_node2_host_uuid})
			{
				$host_key = "anvil_node2_host_uuid";
			}
			if ($host_key)
			{
				my $query = "
UPDATE 
    anvils 
SET 
    ".$host_key." = NULL, 
    modified_date = ".$anvil->Database->quote($anvil->Database->refresh_timestamp)." 
WHERE 
    anvil_uuid    = ".$anvil->Database->quote($anvil_uuid)."
;";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
				push @{$queries}, $query;
			}
		}
		
		# If deleting an Anvil!, we need to clear any Anvil! references from storage groups.
		if (($table eq "anvils") && ($anvil->data->{purge}{anvil_uuid}))
		{
			# Storage groups
			$query = "
SELECT 
    storage_group_member_uuid 
FROM 
    storage_group_members 
WHERE 
    storage_group_member_storage_group_uuid = 
    (
        SELECT 
            storage_group_uuid 
        FROM 
            storage_groups 
        WHERE 
            storage_group_anvil_uuid = ".$anvil->Database->quote($anvil->data->{purge}{anvil_uuid})."
    )
;";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
			my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
			my $count   = @{$results};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				results => $results, 
				count   => $count, 
			}});
			foreach my $row (@{$results})
			{
				my $storage_group_member_uuid = $row->[0];
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { storage_group_member_uuid => $storage_group_member_uuid }});
				
				my $query = "DELETE FROM history.storage_group_members WHERE storage_group_member_uuid = ".$anvil->Database->quote($storage_group_member_uuid).";";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
				push @{$queries}, $query;
				
				$query = "DELETE FROM storage_group_members WHERE storage_group_member_uuid = ".$anvil->Database->quote($storage_group_member_uuid).";";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
				push @{$queries}, $query;
			}
		
			$query = "DELETE FROM history.storage_groups WHERE storage_group_anvil_uuid = ".$anvil->Database->quote($anvil->data->{purge}{anvil_uuid}).";";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
			push @{$queries}, $query;
			
			$query = "DELETE FROM storage_groups WHERE storage_group_anvil_uuid = ".$anvil->Database->quote($anvil->data->{purge}{anvil_uuid}).";";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
			push @{$queries}, $query;
		}
		
		# Just delete the record normally.
		if ($anvil->data->{sys}{database}{history_table}{$table})
		{
			my $query = "DELETE FROM history.".$table." WHERE ".$host_uuid_column." = ".$anvil->Database->quote($host_uuid).";";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
			push @{$queries}, $query;
		}
		
		my $query = "DELETE FROM ".$table." WHERE ".$host_uuid_column." = ".$anvil->Database->quote($host_uuid).";";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
		push @{$queries}, $query;
	}
	
	# Commit.
	my $problem = $anvil->Database->write({query => $queries, source => $THIS_FILE, line => __LINE__});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { problem => $problem }});
	if ($problem)
	{
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, 'print' => 1, priority => "err", key => "error_0364"});
		$anvil->nice_exit({exit_code => 1});
	}
	
	$vacuum = 1;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { vacuum => $vacuum }});
}

# If we're deleting an Anvil!, clear it out now.
if ($anvil->data->{purge}{anvil_uuid})
{
	# List all database tables in reverse order with X_host_uuid tables
	$anvil->Database->find_host_uuid_columns({search_column => "anvil_uuid", main_table => "anvils"});
	
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0246", variables => {
		anvil_name => $anvil->data->{purge}{anvil_name},
		anvil_uuid => $anvil->data->{purge}{anvil_uuid},
	}});
	
	my $queries = [];
	foreach my $hash_ref (@{$anvil->data->{sys}{database}{uuid_tables}})
	{
		my $table            = $hash_ref->{table};
		my $host_uuid_column = $hash_ref->{host_uuid_column};
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
			's1:table'            => $table,
			's2:host_uuid_column' => $host_uuid_column, 
		}});
		
		# If the table is 'servers', we need to pull up the server_uuids and delete their definition 
		# file entries.
		if ($table eq "servers")
		{
			my $query = "SELECT server_uuid FROM servers WHERE server_anvil_uuid = ".$anvil->Database->quote($anvil->data->{purge}{anvil_uuid}).";";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
			my $results = $anvil->Database->query({query => $query, source => $THIS_FILE, line => __LINE__});
			my $count   = @{$results};
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { 
				results => $results, 
				count   => $count, 
			}});
			foreach my $row (@{$results})
			{
				my $server_uuid = $row->[0];
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { server_uuid => $server_uuid }});
				
				my $query = "DELETE FROM history.server_definitions WHERE server_definition_server_uuid = ".$anvil->Database->quote($server_uuid).";";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
				push @{$queries}, $query;
				
				$query = "DELETE FROM server_definitions WHERE server_definition_server_uuid = ".$anvil->Database->quote($server_uuid).";";
				$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
				push @{$queries}, $query;
			}
			
		}
		
		if ($anvil->data->{sys}{database}{history_table}{$table})
		{
			my $query = "DELETE FROM history.".$table." WHERE ".$host_uuid_column." = ".$anvil->Database->quote($anvil->data->{purge}{anvil_uuid}).";";
			$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
			push @{$queries}, $query;
		}
		
		my $query = "DELETE FROM ".$table." WHERE ".$host_uuid_column." = ".$anvil->Database->quote($anvil->data->{purge}{anvil_uuid}).";";
		$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { query => $query }});
		push @{$queries}, $query;
	}
	
	# Commit.
	my $problem = $anvil->Database->write({query => $queries, source => $THIS_FILE, line => __LINE__});
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { problem => $problem }});
	if ($problem)
	{
		$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, level => 0, 'print' => 1, priority => "err", key => "error_0364"});
		$anvil->nice_exit({exit_code => 1});
	}
	
	$vacuum = 1;
	$anvil->Log->variables({source => $THIS_FILE, line => __LINE__, level => 2, list => { vacuum => $vacuum }});
}

# Vacuum the database
if ($vacuum)
{
	$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "log_0458"});
	my $query = "VACUUM FULL;";
	$anvil->Database->write({query => $query, source => $THIS_FILE, line => __LINE__});
}

$anvil->Log->entry({source => $THIS_FILE, line => __LINE__, 'print' => 1, level => 1, key => "message_0025"});
$anvil->nice_exit({exit_code => 0});