# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
#
# This file is part of the LibreOffice project.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#

import six

from libreoffice.util import printing
from libreoffice.util.uno import TypeClass, make_uno_type, uno_cast

class UnoAnyPrinter(object):
    '''Prints UNO any'''

    def __init__(self, typename, value):
        self.value = value
        self.typename = typename.replace('com::sun::star::', '')

    def to_string(self):
        type_desc = self.value['pType']
        assert type_desc
        type = make_uno_type(type_desc.dereference())
        assert type
        if type_desc.dereference()['eTypeClass'] == TypeClass.VOID:
            return ('%s(%s)' % (self.typename, type.tag))
        else:
            ptr = self.value['pData']
            assert ptr
            return ('%s(%s: %s)' % (self.typename, type.tag, str(uno_cast(type, ptr).dereference())))

class UnoReferencePrinter(object):
    '''Prints reference to a UNO interface'''

    def __init__(self, typename, value):
        self.value = value
        self.typename = typename.replace('com::sun::star::', '')

    def to_string(self):
        iface = self.value['_pInterface']
        if iface:
            try:
                return '%s to (%s) %s' % (self.typename, str(iface.dynamic_type), str(iface))
            except:
                # fallback for potential problem:
                # base class 'com::sun::star::uno::XInterface' is ambiguous
                return '%s to (XInterface) %s' % (self.typename, str(iface))

        else:
            return "empty %s" % self.typename

class UnoSequencePrinter(object):
    '''Prints UNO Sequence'''

    class iterator(six.Iterator):
        '''Sequence iterator'''

        def __init__(self, first, size):
            self.item = first
            self.size = size
            self.count = 0

        def __iter__(self):
            return self

        def __next__(self):
            if self.count == self.size:
                raise StopIteration
            count = self.count
            self.count = self.count + 1
            elem = self.item.dereference()
            self.item = self.item + 1
            return ('[%d]' % count, elem)


    def __init__(self, typename, value):
        self.value = value
        self.typename = typename.replace('com::sun::star::', '')

    def to_string(self):
        pimpl = self.value['_pSequence']
        if pimpl:
            impl = pimpl.dereference()
            elems = impl['nElements']
            if elems == 0:
                return "empty %s" % self.typename
            else:
                return "%s of length %d" % (self.typename, elems)
        else:
            return "uninitialized %s" % self.typename

    def children(self):
        pimpl = self.value['_pSequence']
        if pimpl:
            impl = pimpl.dereference()
            elemtype = self.value.type.template_argument(0)
            elements = impl['elements'].cast(elemtype.pointer())
            return self.iterator(elements, int(impl['nElements']))
        else:
            # TODO is that the best thing to do here?
            return None

    def display_hint(self):
        if self.value['_pSequence']:
            return 'array'
        else:
            return None

class UnoTypePrinter(object):
    '''Prints UNO Type'''

    def __init__(self, typename, value):
        self.value = value
        self.typename = typename.replace('com::sun::star::', '')

    def to_string(self):
        uno = make_uno_type(self.value)
        if uno:
            return "%s %s" % (self.typename, uno.tag)
            # return "%s %s" % (self.typename, uno.typename)
        else:
            return "invalid %s" % self.typename

class CppuThreadpoolThreadPoolPrinter(object):
    '''Prints cppu_threadpool::ThreadPool objects (a hack to avoid infinite recursion through sal.RtlReferencePrinter when printing an rtl::Reference<cppu_threadpool::ThreadPool> whose std::list<cppu_threadpool::WaitingThread*> m_lstThreads member, via rtl::Reference<cppu_threadpool::ORequestThread> thread member, via rtl::Reference<cppu_threadpool::ThreadPool> m_aThreadPool member, has a circular reference back)'''

    def __init__(self, typename, value):
        self.typename = typename
        self.value = value

    def to_string(self):
        return '%s@%s' % (self.typename, self.value.address)

printer = None

def build_pretty_printers():
    global printer

    printer = printing.Printer("libreoffice/cppu")

    # basic UNO stuff
    printer.add('_uno_Any', UnoAnyPrinter)
    printer.add('com::sun::star::uno::Any', UnoAnyPrinter)
    printer.add('com::sun::star::uno::Reference', UnoReferencePrinter)
    printer.add('com::sun::star::uno::Sequence', UnoSequencePrinter)
    printer.add('com::sun::star::uno::Type', UnoTypePrinter)
    printer.add('cppu_threadpool::ThreadPool', CppuThreadpoolThreadPoolPrinter)

def register_pretty_printers(obj):
    printing.register_pretty_printer(printer, obj)

build_pretty_printers()

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