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from __future__ import print_function, absolute_import

"""
signature_mapping.py

This module has the mapping from the pyside C-modules view of signatures
to the Python representation.

The PySide modules are not loaded in advance, but only after they appear
in sys.modules. This minimises the loading overhead.
In principle, we need to re-load the module, when the imports change.
But it is much easier to do it on demand, when we get an exception.
See _resolve_value() in singature.py
"""

import sys
import struct
import PySide2

from . import typing
ellipsis = "..."
Char = typing.Union[str, int]     # how do I model the limitation to 1 char?
StringList = typing.List[str]
IntList = typing.List[int]
Variant = typing.Any
ModelIndexList = typing.List[int]
QImageCleanupFunction = typing.Callable
FloatMatrix = typing.List[typing.List[float]]
# Pair could be more specific, but we loose the info in the generator.
Pair = typing.Tuple[typing.Any, typing.Any]
MultiMap = typing.DefaultDict[str, typing.List[str]]
Text = typing.Text

# ulong_max is only 32 bit on windows.
ulong_max = 2*sys.maxsize+1 if len(struct.pack("L", 1)) != 4 else 0xffffffff
ushort_max = 0xffff

GL_COLOR_BUFFER_BIT = 0x00004000
GL_NEAREST = 0x2600

WId = int

# from 5.9
GL_TEXTURE_2D = 0x0DE1
GL_RGBA = 0x1908

class _NotCalled(str):
    """
    Wrap some text with semantics

    This class is wrapped around text in order to avoid calling it.
    There are three reasons for this:

      - some instances cannot be created since they are abstract,
      - some can only be created after qApp was created,
      - some have an ugly __repr__ with angle brackets in it.

    By using derived classes, good looking instances can be created
    which can be used to generate source code or .pyi files. When the
    real object is needed, the wrapper can simply be called.
    """
    def __repr__(self):
        suppress = "PySide2.support.signature.typing."
        text = self[len(suppress):] if self.startswith(suppress) else self
        return "{}({})".format(type(self).__name__, text)

    def __call__(self):
        from .mapping import __dict__ as namespace
        text = self if self.endswith(")") else self + "()"
        return eval(text, namespace)

# Some types are abstract. They just show their name.
class Virtual(_NotCalled):
    pass

# Other types I simply could not find.
class Missing(_NotCalled):
    pass

class Invalid(_NotCalled):
    pass

# Helper types
class Default(_NotCalled):
    pass

class Instance(_NotCalled):
    pass


class Reloader(object):
    def __init__(self):
        self.sys_module_count = 0
        self.uninitialized = PySide2.__all__[:]

    def update(self):
        if self.sys_module_count == len(sys.modules):
            return
        self.sys_module_count = len(sys.modules)
        g = globals()
        for mod_name in self.uninitialized[:]:
            if "PySide2." + mod_name in sys.modules:
                self.uninitialized.remove(mod_name)
                proc_name = "init_" + mod_name
                if proc_name in g:
                    g.update(g[proc_name]())


update_mapping = Reloader().update
type_map = {}

def init_QtCore():
    import PySide2.QtCore
    from PySide2.QtCore import Qt, QUrl, QDir, QGenericArgument
    from PySide2.QtCore import QRect, QSize, QPoint, QLocale, QByteArray
    from PySide2.QtCore import QMarginsF # 5.9
    try:
        # seems to be not generated by 5.9 ATM.
        from PySide2.QtCore import Connection
    except ImportError:
        pass
    type_map.update({
        "str": str,
        "int": int,
        "QString": str,
        "bool": bool,
        "PyObject": object,
        "void": int, # be more specific?
        "char": Char,
        "'%'": "%",
        "' '": " ",
        "false": False,
        "double": float,
        "'g'": "g",
        "long long": int,
        "unsigned int": int, # should we define an unsigned type?
        "Q_NULLPTR": None,
        "long": int,
        "float": float,
        "short": int,
        "unsigned long": int,
        "unsigned long long": int,
        "unsigned short": int,
        "QStringList": StringList,
        "QList": list,
        "QChar": Char,
        "signed char": Char,
        "QVariant": Variant,
        "QVariant.Type": type, # not so sure here...
        "QStringRef": str,
        "QString()": "",
        "QModelIndexList": ModelIndexList,
        "QPair": Pair,
        "unsigned char": Char,
        "QSet": set, # seems _not_ to work
        "QVector": list,
        "QJsonObject": dict, # seems to work
        "QStringList()": [],
        "ULONG_MAX": ulong_max,
        "quintptr": int,
        "PyCallable": typing.Callable,
        "...": ellipsis, # no idea how this should be translated... maybe so?
        "PyTypeObject": type,
        "PySequence": typing.Sequence,
        "qptrdiff": int,
        "true": True,
        "Qt.HANDLE": int, # be more explicit with some consts?
        "list of QAbstractState": list, # how to use typing.List when we don't have QAbstractState?
        "list of QAbstractAnimation": list, # dto.
        "QVariant()": Invalid(Variant),
        "QMap": dict,
        "PySide2.QtCore.bool": bool,
        "QHash": dict,
        "PySide2.QtCore.QChar": Char,
        "PySide2.QtCore.qreal": float,
        "PySide2.QtCore.float": float,
        "PySide2.QtCore.qint16": int,
        "PySide2.QtCore.qint32": int,
        "PySide2.QtCore.qint64": int,
        "PySide2.QtCore.qint8": int,
        "PySide2.QtCore.QString": str,
        "PySide2.QtCore.QStringList": StringList,
        "PySide2.QtCore.QVariant": Variant,
        "PySide2.QtCore.quint16": int,
        "PySide2.QtCore.quint32": int,
        "PySide2.QtCore.quint64": int,
        "PySide2.QtCore.quint8": int,
        "PySide2.QtCore.uchar": Char,
        "PySide2.QtCore.unsigned char": Char, # 5.9
        "PySide2.QtCore.long": int,
        "PySide2.QtCore.QUrl.ComponentFormattingOptions":
            PySide2.QtCore.QUrl.ComponentFormattingOption, # mismatch option/enum, why???
        "QUrl.FormattingOptions(PrettyDecoded)": Instance(
            "QUrl.FormattingOptions(QUrl.PrettyDecoded)"),
        # from 5.9
        "QDir.Filters(AllEntries | NoDotAndDotDot)": Instance(
            "QDir.Filters(QDir.AllEntries | QDir.NoDotAndDotDot)"),
        "NULL": None, # 5.6, MSVC
        "QDir.SortFlags(Name | IgnoreCase)": Instance(
            "QDir.SortFlags(QDir.Name | QDir.IgnoreCase)"),
        "PyBytes": bytes,
        "PyByteArray": bytearray,
        "PyUnicode": Text,
        "signed long": int,
        "PySide2.QtCore.int": int,
        "PySide2.QtCore.char": StringList, # A 'char **' is a list of strings.
        "char[]": StringList, # 5.9
        "unsigned long int": int, # 5.6, RHEL 6.6
        "unsigned short int": int, # 5.6, RHEL 6.6
        "4294967295UL": 4294967295, # 5.6, RHEL 6.6
        "PySide2.QtCore.int32_t": int, # 5.9
        "PySide2.QtCore.int64_t": int, # 5.9
        "UnsignedShortType": int, # 5.9
        "nullptr": None, # 5.9
        "uint64_t": int, # 5.9
        "PySide2.QtCore.uint32_t": int, # 5.9
        "float[][]": FloatMatrix, # 5.9
        "PySide2.QtCore.unsigned int": int, # 5.9 Ubuntu
        "PySide2.QtCore.long long": int, # 5.9, MSVC 15
        "QGenericArgument(nullptr)": QGenericArgument(None), # 5.10
        "QModelIndex()": Invalid("PySide2.QtCore.QModelIndex"), # repr is btw. very wrong, fix it?!
        "QGenericArgument((0))": None, # 5.6, RHEL 6.6. Is that ok?
        "QGenericArgument()": None,
        "QGenericArgument(0)": None,
        "QGenericArgument(NULL)": None, # 5.6, MSVC
        "QGenericArgument(Q_NULLPTR)": None,
        "zero(PySide2.QtCore.QObject)": None,
        "zero(PySide2.QtCore.QThread)": None,
        "zero(quintptr)": 0,
        "zero(str)": "",
        "zero(int)": 0,
        "zero(PySide2.QtCore.QState)": None,
        "zero(PySide2.QtCore.bool)": False,
        "zero(PySide2.QtCore.int)": 0,
        "zero(void)": None,
        "zero(long long)": 0,
        "zero(PySide2.QtCore.QAbstractItemModel)": None,
        "zero(PySide2.QtCore.QJsonParseError)": None,
        "zero(double)": 0.0,
        "zero(PySide2.QtCore.qint64)": 0,
        "zero(PySide2.QtCore.QTextCodec.ConverterState)": None,
        "zero(long long)": 0,
        "zero(QImageCleanupFunction)": None,
        "zero(unsigned int)": 0,
        "zero(PySide2.QtCore.QPoint)": Default("PySide2.QtCore.QPoint"),
        "zero(unsigned char)": 0,
        "zero(PySide2.QtCore.QEvent.Type)": None,
        "CheckIndexOption.NoOption": Instance(
            "PySide2.QtCore.QAbstractItemModel.CheckIndexOptions.NoOption"), # 5.11
    })
    try:
        type_map.update({
            "PySide2.QtCore.QMetaObject.Connection": PySide2.QtCore.Connection, # wrong!
        })
    except AttributeError:
        # this does not exist on 5.9 ATM.
        pass
    return locals()

def init_QtGui():
    import PySide2.QtGui
    from PySide2.QtGui import QPageLayout, QPageSize # 5.9
    type_map.update({
        "QVector< QTextLayout.FormatRange >()": [], # do we need more structure?
        "USHRT_MAX": ushort_max,
        "0.0f": 0.0,
        "1.0f": 1.0,
        "uint32_t": int,
        "uint8_t": int,
        "int32_t": int,
        "GL_COLOR_BUFFER_BIT": GL_COLOR_BUFFER_BIT,
        "GL_NEAREST": GL_NEAREST,
        "WId": WId,
        "PySide2.QtGui.QPlatformSurface": Virtual("PySide2.QtGui.QPlatformSurface"), # hmm...
        "QList< QTouchEvent.TouchPoint >()": [], # XXX improve?
        "QPixmap()": Default("PySide2.QtGui.QPixmap"), # can't create without qApp
        "PySide2.QtCore.uint8_t": int, # macOS 5.9
        "zero(uint32_t)": 0,
        "zero(PySide2.QtGui.QWindow)": None,
        "zero(PySide2.QtGui.QOpenGLContext)": None,
        "zero(PySide2.QtGui.QRegion)": None,
        "zero(PySide2.QtGui.QPaintDevice)": None,
        "zero(PySide2.QtGui.QTextLayout.FormatRange)": None,
        "zero(PySide2.QtGui.QTouchDevice)": None,
        "zero(PySide2.QtGui.QScreen)": None,
    })
    return locals()

def init_QtWidgets():
    import PySide2.QtWidgets
    from PySide2.QtWidgets import QWidget, QMessageBox, QStyleOption, QStyleHintReturn, QStyleOptionComplex
    from PySide2.QtWidgets import QGraphicsItem, QStyleOptionGraphicsItem # 5.9
    GraphicsItemList = typing.List[QGraphicsItem]
    StyleOptionGraphicsItemList = typing.List[QStyleOptionGraphicsItem]
    type_map.update({
        "QMessageBox.StandardButtons(Yes | No)": Instance(
            "QMessageBox.StandardButtons(QMessageBox.Yes | QMessageBox.No)"),
        "QWidget.RenderFlags(DrawWindowBackground | DrawChildren)": Instance(
            "QWidget.RenderFlags(QWidget.DrawWindowBackground | QWidget.DrawChildren)"),
        "static_cast<Qt.MatchFlags>(Qt.MatchExactly|Qt.MatchCaseSensitive)": Instance(
            "Qt.MatchFlags(Qt.MatchExactly | Qt.MatchCaseSensitive)"),
        "QVector< int >()": [],
        "WId": WId,
        # from 5.9
        "Type": PySide2.QtWidgets.QListWidgetItem.Type,
        "SO_Default": QStyleOption.SO_Default,
        "SH_Default": QStyleHintReturn.SH_Default,
        "SO_Complex": QStyleOptionComplex.SO_Complex,
        "QGraphicsItem[]": GraphicsItemList,
        "QStyleOptionGraphicsItem[]": StyleOptionGraphicsItemList,
        "zero(PySide2.QtWidgets.QWidget)": None,
        "zero(PySide2.QtWidgets.QGraphicsItem)": None,
        "zero(PySide2.QtCore.QEvent)": None,
        "zero(PySide2.QtWidgets.QStyleOption)": None,
        "zero(PySide2.QtWidgets.QStyleHintReturn)": None,
        "zero(PySide2.QtWidgets.QGraphicsLayoutItem)": None,
        "zero(PySide2.QtWidgets.QListWidget)": None,
        "zero(PySide2.QtGui.QKeySequence)": None,
        "zero(PySide2.QtWidgets.QAction)": None,
        "zero(PySide2.QtWidgets.QUndoCommand)": None,
        "zero(WId)": 0,
    })
    return locals()

def init_QtSql():
    import PySide2.QtSql
    from PySide2.QtSql import QSqlDatabase
    type_map.update({
        "QLatin1String(defaultConnection)": QSqlDatabase.defaultConnection,
        "QVariant.Invalid": Invalid("PySide2.QtCore.QVariant"), # not sure what I should create, here...
    })
    return locals()

def init_QtNetwork():
    import PySide2.QtNetwork
    type_map.update({
        "QMultiMap": MultiMap,
        "zero(unsigned short)": 0,
        "zero(PySide2.QtCore.QIODevice)": None,
        "zero(QList)": [],
    })
    return locals()

def init_QtXmlPatterns():
    import PySide2.QtXmlPatterns
    from PySide2.QtXmlPatterns import QXmlName
    type_map.update({
        "QXmlName.PrefixCode": Missing("PySide2.QtXmlPatterns.QXmlName.PrefixCode"),
        "QXmlName.NamespaceCode": Missing("PySide2.QtXmlPatterns.QXmlName.NamespaceCode")
    })
    return locals()

def init_QtMultimedia():
    import PySide2.QtMultimedia
    import PySide2.QtMultimediaWidgets
    type_map.update({
        "QVariantMap": dict,
        "QGraphicsVideoItem": PySide2.QtMultimediaWidgets.QGraphicsVideoItem,
        "QVideoWidget": PySide2.QtMultimediaWidgets.QVideoWidget,
    })
    return locals()

def init_QtOpenGL():
    import PySide2.QtOpenGL
    type_map.update({
        "GLuint": int,
        "GLenum": int,
        "GLint": int,
        "GLbitfield": int,
        "PySide2.QtOpenGL.GLint": int,
        "PySide2.QtOpenGL.GLuint": int,
        "GLfloat": float, # 5.6, MSVC 15
        "zero(PySide2.QtOpenGL.QGLContext)": None,
        "zero(GLenum)": 0,
        "zero(PySide2.QtOpenGL.QGLWidget)": None,
    })
    return locals()

def init_QtQml():
    import PySide2.QtQml
    type_map.update({
        "QJSValueList()": [],
        "PySide2.QtQml.bool volatile": bool,
        # from 5.9
        "QVariantHash()": {},
        "zero(PySide2.QtQml.QQmlContext)": None,
        "zero(PySide2.QtQml.QQmlEngine)": None,
    })
    return locals()

def init_QtQuick():
    import PySide2.QtQuick
    type_map.update({
        "PySide2.QtQuick.QSharedPointer": int,
        "PySide2.QtCore.uint": int,
        "T": int,
        "zero(PySide2.QtQuick.QQuickItem)": None,
        "zero(GLuint)": 0,
    })
    return locals()

def init_QtScript():
    import PySide2.QtScript
    type_map.update({
        "QScriptValueList()": [],
    })
    return locals()

def init_QtTest():
    import PySide2.QtTest
    type_map.update({
        "PySide2.QtTest.QTouchEventSequence": PySide2.QtTest.QTest.QTouchEventSequence,
    })
    return locals()

# from 5.9
def init_QtWebEngineWidgets():
    import PySide2.QtWebEngineWidgets
    type_map.update({
        "PySide2.QtTest.QTouchEventSequence": PySide2.QtTest.QTest.QTouchEventSequence,
        "zero(PySide2.QtWebEngineWidgets.QWebEnginePage.FindFlags)": 0,
    })
    return locals()

# from 5.6, MSVC
def init_QtWinExtras():
    import PySide2.QtWinExtras
    type_map.update({
        "QList< QWinJumpListItem* >()": [],
    })
    return locals()

# Here was testbinding, actually the source of all evil.

# end of file
