"""
    Base class for reports. Child classes will need to implement
    the onSave() method.
"""
import wx
import logging
import sys
import wx.html as html

logger = logging.getLogger(__name__)

ISPDF = False
if sys.platform == "win32":
    _STATICBOX_WIDTH = 450
    PANEL_WIDTH = 500 
    PANEL_HEIGHT = 700
    FONT_VARIANT = 0
    ISPDF = True
# For OSX and everything else
else:
    _STATICBOX_WIDTH = 480
    PANEL_WIDTH = 530
    PANEL_HEIGHT = 700
    FONT_VARIANT = 1
    ISPDF = True

class BaseReportDialog(wx.Dialog):
    
    def __init__(self, report_list, *args, **kwds):
        """
        Initialization. The parameters added to Dialog are:
        
        :param report_list: list of html_str, text_str, image for report
        """
        kwds["style"] = wx.RESIZE_BORDER|wx.DEFAULT_DIALOG_STYLE
        super(BaseReportDialog, self).__init__(*args, **kwds)
        kwds["image"] = 'Dynamic Image'

        # title
        self.SetTitle("Report")
        # size
        self.SetSize((720, 650))
        # font size
        self.SetWindowVariant(variant=FONT_VARIANT)
        # check if tit is MAC
        self.is_pdf = ISPDF
        # report string
        self.report_list = report_list
        # wild card
        # pdf supporting only on MAC
        if self.is_pdf:
            self.wild_card = ' PDF files (*.pdf)|*.pdf|'
            self.index_offset = 0
        else:
            self.wild_card = ''
            self.index_offset = 1
        self.wild_card += 'HTML files (*.html)|*.html|'
        self.wild_card += 'Text files (*.txt)|*.txt'

    def _setup_layout(self):
        """
        Set up layout
        """
        hbox = wx.BoxSizer(wx.HORIZONTAL)
        
        # buttons
        button_close = wx.Button(self, wx.ID_OK, "Close")
        button_close.SetToolTipString("Close this report window.")
        hbox.Add(button_close)
        button_close.SetFocus()

        button_print = wx.Button(self, wx.NewId(), "Print")
        button_print.SetToolTipString("Print this report.")
        button_print.Bind(wx.EVT_BUTTON, self.onPrint,
                          id=button_print.GetId())
        hbox.Add(button_print)
        
        button_save = wx.Button(self, wx.NewId(), "Save")
        button_save.SetToolTipString("Save this report.")
        button_save.Bind(wx.EVT_BUTTON, self.onSave, id=button_save.GetId())
        hbox.Add(button_save)
        
        # panel for report page
        vbox = wx.BoxSizer(wx.VERTICAL)
        # html window
        self.hwindow = html.HtmlWindow(self, style=wx.BORDER)
        # set the html page with the report string
        self.hwindow.SetPage(self.report_html)
        
        # add panels to boxsizers
        vbox.Add(hbox)
        vbox.Add(self.hwindow, 1, wx.EXPAND|wx.ALL,0)

        self.SetSizer(vbox)
        self.Centre()
        self.Show(True)

    def onPreview(self, event=None):
        """
        Preview
        : event: Preview button event
        """
        previewh = html.HtmlEasyPrinting(name="Printing", parentWindow=self)
        previewh.PreviewText(self.report_html)
        
    def onPrint(self, event=None):
        """
        Print
        : event: Print button event
        """
        printh = html.HtmlEasyPrinting(name="Printing", parentWindow=self)
        printh.PrintText(self.report_html)

    def OnClose(self, event=None):
        """
        Close the Dialog
        : event: Close button event
        """
        self.Close()
    
    def HTML2PDF(self, data, filename):
        """
        Create a PDF file from html source string.
        Returns True is the file creation was successful. 
        : data: html string
        : filename: name of file to be saved
        """
        try:
            from xhtml2pdf import pisa
            # open output file for writing (truncated binary)
            resultFile = open(filename, "w+b")
            # convert HTML to PDF
            pisaStatus = pisa.CreatePDF(data, dest=resultFile)
            # close output file
            resultFile.close()
            self.Update()
            return pisaStatus.err
        except:
            logger.error("Error creating pdf: %s" % sys.exc_value)
        return False

