package PVE::API2::ACL;

use strict;
use warnings;
use PVE::Cluster qw (cfs_read_file cfs_write_file);
use PVE::Tools qw(split_list);
use PVE::AccessControl;
use PVE::Exception qw(raise_param_exc);

use PVE::SafeSyslog;

use Data::Dumper; # fixme: remove

use PVE::RESTHandler;

use base qw(PVE::RESTHandler);

__PACKAGE__->register_method ({
    name => 'read_acl', 
    path => '', 
    method => 'GET',
    description => "Get Access Control List (ACLs).",
    permissions => { 
	description => "The returned list is restricted to objects where you have rights to modify permissions.",
	user => 'all',
    },
    parameters => {
	additionalProperties => 0,
	properties => {},
    },
    returns => {
	type => 'array',
	items => {
	    type => "object",
	    additionalProperties => 0,
	    properties => {
		path => { type => 'string' },
		type => { type => 'string', enum => ['user', 'group'] },
		ugid => { type => 'string' },
		roleid => { type => 'string' },
		propagate => { type => 'boolean' },
	    },
	},
    },
    code => sub {
	my ($param) = @_;
    
	my $rpcenv = PVE::RPCEnvironment::get();
	my $authuser = $rpcenv->get_user();
	my $res = [];

	my $usercfg = $rpcenv->{user_cfg};
	if (!$usercfg || !$usercfg->{acl}) {
	    return $res;
	}

	my $audit = $rpcenv->check($authuser, '/access', ['Sys.Audit'], 1);

	my $acl = $usercfg->{acl};
	foreach my $path (keys %$acl) {
	    foreach my $type (qw(users groups)) {
		my $d = $acl->{$path}->{$type};
		next if !$d;
		next if !($audit || $rpcenv->check_perm_modify($authuser, $path, 1));
		foreach my $id (keys %$d) {
		    foreach my $role (keys %{$d->{$id}}) {
			my $propagate = $d->{$id}->{$role};
			push @$res, {
			    path => $path,
			    type => $type eq 'groups' ? 'group' : 'user',
			    ugid => $id,
			    roleid => $role,
			    propagate => $propagate,
			};
		    }
		}
	    }
	}

	return $res;
    }});

__PACKAGE__->register_method ({
    name => 'update_acl', 
    protected => 1,
    path => '', 
    method => 'PUT',
    permissions => { 
	check => ['perm-modify', '{path}'],
    },
    description => "Update Access Control List (add or remove permissions).",
    parameters => {
   	additionalProperties => 0,
	properties => {
	    path => {
		description => "Access control path",
		type => 'string',
	    },
	    users => { 
		description => "List of users.",
		type => 'string',  format => 'pve-userid-list',  
		optional => 1,
	    },
	    groups => { 
		description => "List of groups.",
		type => 'string', format => 'pve-groupid-list',
		optional => 1,  
	    },
	    roles => { 
		description => "List of roles.",
		type => 'string', format => 'pve-roleid-list',
	    },
	    propagate => { 
		description => "Allow to propagate (inherit) permissions.",
		type => 'boolean', 
		optional => 1,
		default => 1,
	    },
	    delete => {
		description => "Remove permissions (instead of adding it).",
		type => 'boolean', 
		optional => 1,
	    },
	},
    },
    returns => { type => 'null' },
    code => sub {
	my ($param) = @_;

	if (!($param->{users} || $param->{groups})) {
	    raise_param_exc({ 
		users => "either 'users' or 'groups' is required.", 
		groups => "either 'users' or 'groups' is required." });
	}

	my $path = PVE::AccessControl::normalize_path($param->{path});
	raise_param_exc({ path => "invalid ACL path '$param->{path}'" }) if !$path;

	PVE::AccessControl::lock_user_config(
	    sub {
			
		my $cfg = cfs_read_file("user.cfg");

		my $propagate = 1;
		
		if (defined($param->{propagate})) {
		    $propagate = $param->{propagate} ? 1 : 0;
		}

		foreach my $role (split_list($param->{roles})) {
		    die "role '$role' does not exist\n" 
			if !$cfg->{roles}->{$role};

		    foreach my $group (split_list($param->{groups})) {

			die "group '$group' does not exist\n"
			    if !$cfg->{groups}->{$group};

			if ($param->{delete}) {
			    delete($cfg->{acl}->{$path}->{groups}->{$group}->{$role});
			} else {
			    $cfg->{acl}->{$path}->{groups}->{$group}->{$role} = $propagate;
			}
		    }

		    foreach my $userid (split_list($param->{users})) {
			my $username = PVE::AccessControl::verify_username($userid);

			die "user '$username' does not exist\n"
			    if !$cfg->{users}->{$username};

			if ($param->{delete}) {
			    delete($cfg->{acl}->{$path}->{users}->{$username}->{$role});
			} else {
			    $cfg->{acl}->{$path}->{users}->{$username}->{$role} = $propagate;
			} 
		    }
		}

		cfs_write_file("user.cfg", $cfg);
	    }, "ACL update failed");

	return undef;
    }});

1;