import os
import wx

import wx.lib.agw.multidirdialog as MDD
from abc import ABCMeta, abstractmethod

from gooey.gui.lang import i18n
from gooey.gui.util.filedrop import FileDrop
from gooey.gui.widgets.calender_dialog import CalendarDlg


class WidgetPack(object):
  """
  Interface specifying the contract to which
  all `WidgetPack`s will adhere
  """
  __metaclass__ = ABCMeta

  @abstractmethod
  def build(self, parent, data, choices=None):
    pass

  def onResize(self, evt):
    pass

  @staticmethod
  def get_command(data):
    return ''

  @staticmethod
  def disable_quoting(data):
    nargs = data.get('nargs', None)
    if not nargs:
      return False
    return nargs not in (1, '?')


class BaseChooser(WidgetPack):
  def __init__(self):
    self.button_text = i18n._('browse')
    self.parent = None
    self.widget = None
    self.button = None

  def build(self, parent, data, choices=None):
    self.parent = parent
    self.widget = wx.TextCtrl(self.parent)
    self.widget.AppendText('')
    self.widget.SetMinSize((0, -1))
    dt = FileDrop(self.widget)
    self.widget.SetDropTarget(dt)
    self.button = wx.Button(self.parent, label=self.button_text, size=(73, 23))

    widget_sizer = wx.BoxSizer(wx.HORIZONTAL)
    widget_sizer.Add(self.widget, 1, wx.EXPAND)
    widget_sizer.AddSpacer(10)
    widget_sizer.Add(self.button, 0, wx.ALIGN_CENTER_VERTICAL)

    parent.Bind(wx.EVT_BUTTON, self.on_button, self.button)

    return widget_sizer

  def get_value(self):
    return self.widget.GetValue()

  def __repr__(self):
    return self.__class__.__name__


class BaseFileChooser(BaseChooser):
  dialog = None
  def __init__(self):
    BaseChooser.__init__(self)

  def on_button(self, evt):
    dlg = self.dialog(self.parent)
    result = (self.get_path(dlg)
              if dlg.ShowModal() == wx.ID_OK
              else None)
    if result:
      self.widget.SetValue(result)

  def get_path(self, dlg):
    return dlg.GetPath()


class BaseMultiFileChooser(BaseFileChooser):
  def __init__(self, dialog):
    BaseFileChooser.__init__(self)
    self.dialog = dialog

  def get_path(self, dlg):
    return os.pathsep.join(dlg.GetPaths())

class MultiFileSaverPayload(BaseMultiFileChooser):
  def __init__(self, *args, **kwargs):
    BaseMultiFileChooser.__init__(self, build_dialog(wx.FD_MULTIPLE, False))

class MultiDirChooserPayload(BaseMultiFileChooser):
  class MyMultiDirChooser(MDD.MultiDirDialog):
    def __init__(self, *args, **kwargs):
      kwargs.update({
        'title': "Select Directories",
        'defaultPath': os.getcwd(),
        'agwStyle': MDD.DD_MULTIPLE|MDD.DD_DIR_MUST_EXIST
      })
      MDD.MultiDirDialog.__init__(self, *args, **kwargs)

    def GetPaths(self):
      return self.dirCtrl.GetPaths()

  def __init__(self, *args, **kwargs):
    BaseMultiFileChooser.__init__(self, MultiDirChooserPayload.MyMultiDirChooser)


class TextInputPayload(WidgetPack):
  def __init__(self, no_quoting=False):
    self.widget = None
    self.option_string = None
    self.no_quoting = no_quoting

  def build(self, parent, data, choices=None):
    self.widget = wx.TextCtrl(parent)
    dt = FileDrop(self.widget)
    self.widget.SetDropTarget(dt)
    self.widget.SetMinSize((0, -1))
    self.widget.SetDoubleBuffered(True)
    self.widget.AppendText('')
    return self.widget

  def get_value(self):
    return self.widget.GetValue()

class DropdownPayload(WidgetPack):
  default_value = 'Select Option'

  def __init__(self, no_quoting=False):
    self.widget = None
    self.option_string = None
    self.no_quoting = no_quoting

  def build(self, parent, data, choices=None):
    self.widget = wx.ComboBox(
      parent=parent,
      id=-1,
      value=self.default_value,
      choices=[self.default_value] + choices,
      style=wx.CB_DROPDOWN
    )
    return self.widget

  def get_value(self):
    return self.widget.GetValue()

  def set_value(self, text):
    self.widget.SetValue(text)


class CounterPayload(WidgetPack):
  def __init__(self):
    self.widget = None

  def build(self, parent, data, choices=None):
    self.widget = wx.ComboBox(
      parent=parent,
      id=-1,
      value='',
      choices=map(str, range(1, 11)),
      style=wx.CB_DROPDOWN
    )
    return self.widget

  def get_value(self):
    return self.widget.GetValue()

class DirDialog(wx.DirDialog):
  def __init__(self, parent, *args, **kwargs):
    wx.DirDialog.__init__(self, parent, 'Select Directory', style=wx.DD_DEFAULT_STYLE)


def safe_default(data, default):
  return ''

def build_dialog(style, exist_constraint=True, **kwargs):
  if exist_constraint:
    return lambda panel: wx.FileDialog(panel, style=style | wx.FD_FILE_MUST_EXIST, **kwargs)
  else:
    return lambda panel: wx.FileDialog(panel, style=style, **kwargs)

def build_subclass(subclass, dialog):
  return type(subclass, (BaseFileChooser,), {'dialog': dialog})


FileSaverPayload   = build_subclass('FileSaverPayload', staticmethod(build_dialog(wx.FD_SAVE, False, defaultFile="Enter Filename")))
FileChooserPayload = build_subclass('FileChooserPayload', staticmethod(build_dialog(wx.FD_OPEN)))
DirChooserPayload  = build_subclass('DirChooserPayload', DirDialog)
DateChooserPayload = build_subclass('DateChooserPayload', CalendarDlg)
