"""
Dialog report panel to show and summarize the results of 
the invariant calculation.
"""
################################################################################
#This software was developed by the University of Tennessee as part of the
#Distributed Data Analysis of Neutron Scattering Experiments (DANSE)
#project funded by the US National Science Foundation.
#
#See the license text in license.txt
#
#copyright 2009, University of Tennessee
################################################################################

import wx
import sys
import os
import wx.html as html

_STATICBOX_WIDTH = 480
PANEL_WIDTH = 530
PANEL_HEIGHT = 700
FONT_VARIANT = 1
ISMAC = False

if sys.platform == "win32":
    _STATICBOX_WIDTH = 450
    PANEL_WIDTH = 500
    PANEL_HEIGHT = 700
    FONT_VARIANT = 0
    ISMAC = False
elif sys.platform == "darwin":
    ISMAC = True
ISPDF = True

        
class ReportDialog(wx.Dialog):
    """
    The report dialog box.
    """
    
    def __init__(self, list, *args, **kwds):
        """
        Initialization. The parameters added to Dialog are:
        
        :param list: report_list (list of html_str, text_str, image)
        from invariant_state
        """
        kwds["style"] = wx.RESIZE_BORDER|wx.DEFAULT_DIALOG_STYLE
        wx.Dialog.__init__(self, *args, **kwds)
        kwds["image"] = 'Dynamic Image'
        # title
        self.SetTitle("Report: Fitting")
        # 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 = list
        # number of images of plot
        self.nimages = len(list[2])
        
        if list[2] != None:
            # put image path in the report string
            if len(list[2]) == 1:
                self.report_html = self.report_list[0] % \
                                    "memory:img_fit0.png"
            elif len(list[2]) == 2:
                self.report_html = self.report_list[0] % \
                                    ("memory:img_fit0.png",
                                     "memory:img_fit1.png")
            # allows up to three images
            else:
                self.report_html = self.report_list[0] % \
                                    ("memory:img_fit0.png",
                                     "memory:img_fit1.png",
                                     "memory:img_fit2.png")
        else:
            self.report_html = self.report_list[0]
        # layout
        self._setup_layout()
        
    def _setup_layout(self):
        """
        Set up layout
        """
        hbox = wx.BoxSizer(wx.HORIZONTAL)
        
        # buttons
        id = wx.ID_OK
        button_close = wx.Button(self, id, "Close")
        button_close.SetToolTipString("Close this report window.")
        #hbox.Add((5,10), 1 , wx.EXPAND|wx.ADJUST_MINSIZE,0)
        hbox.Add(button_close)
        button_close.SetFocus()

        id = wx.NewId()
        button_preview = wx.Button(self, id, "Preview")
        button_preview.SetToolTipString("Print preview this report.")
        button_preview.Bind(wx.EVT_BUTTON, self.onPreview,
                            id=button_preview.GetId()) 
        hbox.Add(button_preview)

        id = wx.NewId()
        button_print = wx.Button(self, id, "Print")
        button_print.SetToolTipString("Print this report.")
        button_print.Bind(wx.EVT_BUTTON, self.onPrint,
                          id=button_print.GetId())
        hbox.Add(button_print)
        
        id = wx.NewId()
        button_save = wx.Button(self, id, "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
        #panel = wx.Panel(self, -1)
        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 onSave(self, event=None):
        """
        Save
        """
        # pdf supporting only on MAC, not on exe
        if self.is_pdf:
            wild_card = ' PDF files (*.pdf)|*.pdf|'
            ind_cor = 0
        else:
            wild_card = ''
            ind_cor = 1
        wild_card += 'HTML files (*.html)|*.html|'
        wild_card += 'Text files (*.txt)|*.txt'

        #todo: complete saving fig file and as a txt file
        dlg = wx.FileDialog(self, "Choose a file",
                            wildcard=wild_card,
                            style=wx.SAVE|wx.OVERWRITE_PROMPT|wx.CHANGE_DIR)
        dlg.SetFilterIndex(0)  # Set .html files to be default

        if dlg.ShowModal() != wx.ID_OK:
            dlg.Destroy()
            return
        
        fName = dlg.GetPath()
        ext_num = dlg.GetFilterIndex()

        #set file extensions
        img_ext = []
        pic_fname = []
        #PDF
        if ext_num == (0 + 2 * ind_cor):
            # TODO: Sort this case out
            ext = '.pdf'
            
            fName = os.path.splitext(fName)[0] + ext
            dlg.Destroy()
            #pic (png) file path/name
            for num in range(self.nimages):
                im_ext = '_img%s.png' % num
                #img_ext.append(im_ext)
                pic_name = os.path.splitext(fName)[0] + im_ext
                pic_fname.append(pic_name)
                # save the image for use with pdf writer
                self.report_list[2][num].savefig(pic_name)

            #put the image path in html string
            report_frame = self.report_list[0]
            #put image name strings into the html file
            #Note:The str for pic_fname shouldn't be removed.
            if self.nimages == 1:
                html = report_frame % str(pic_fname[0])
            elif self.nimages == 2:
                html = report_frame % (str(pic_fname[0]), str(pic_fname[1]))
            elif self.nimages == 3:
                html = report_frame % (str(pic_fname[0]), str(pic_fname[1]),
                                          str(pic_fname[2]))

            # make/open file in case of absence
            f = open(fName, 'w')
            f.close()
            # write pdf as a pdf file
            pdf = self.HTML2PDF(data=html, filename=fName)
            
            #open pdf
            if pdf:
                os.startfile(str(fName))
            #delete image file
            for num in range(self.nimages):
                os.remove(pic_fname[num])
            return
        #HTML + png(graph)
        elif ext_num == (1 - ind_cor):
            ext = '.html'
            for num in range(self.nimages):
                img_ext.append('_img4html%s.png' % num)
            report_frame = self.report_list[0]
        #TEXT + pdf(graph)
        elif ext_num == (2 - ind_cor):
            ext = '.txt'
            # changing the image extension actually changes the image
            # format on saving
            for num in range(self.nimages):
                img_ext.append('_img4txt%s.pdf' % num)
            report = self.report_list[1]
        else:
            return
        
        #file name
        fName = os.path.splitext(fName)[0] + ext
        dlg.Destroy()
        
        #pic (png) file path/name
        for num in range(self.nimages):
            pic_name = os.path.splitext(fName)[0] + img_ext[num]
            pic_fname.append(pic_name)
        #put the image path in html string
        if ext_num == (1 - ind_cor):
            if self.nimages == 1:
                report = report_frame % os.path.basename(pic_fname[0])
            elif self.nimages == 2:
                report = report_frame % (os.path.basename(pic_fname[0]),
                                         os.path.basename(pic_fname[1]))
            elif self.nimages == 3:
                report = report_frame % (os.path.basename(pic_fname[0]),
                                         os.path.basename(pic_fname[1]),
                                         os.path.basename(pic_fname[2]))
        f = open(fName, 'w')
        f.write(report)
        f.close()
        self.Update()
        #save png file using pic_fname
        for num in range(self.nimages):
            self.report_list[2][num].savefig(pic_fname[num])
        
    def onPreview(self, event=None):
        """
        Preview
        
        : event: Preview button event
        """
        previewh = html.HtmlEasyPrinting(name="Printing", parentWindow=self)
        previewh.PreviewText(self.report_html)
        if event is not None:
            event.Skip()
        self.Update()
    
    def onPrint(self, event=None):
        """
        Print
        
        : event: Print button event
        """
        printh = html.HtmlEasyPrinting(name="Printing", parentWindow=self)
        printh.PrintText(self.report_html)
        if event is not None:
            event.Skip()
        self.Update()
        
    def OnClose(self, event=None):
        """
        Close the Dialog
        
        : event: Close button event
        """
        self.Close()
        # Reset memory
        #wx.MemoryFSHandler()
        if event is not None:
            event.Skip()
    
    def HTML2PDF(self, data, filename):
        """
        Create a PDF file from html source string.
        
        : data: html string
        : filename: name of file to be saved
        """
        import ho.pisa as pisa
        f = file(filename, "wb")
        # pisa requires some extra packages, see their web-site
        pdf = pisa.CreatePDF(data, f)

        # close the file here otherwise it will be open until quitting
        #the application.
        f.close()
        self.Update()
        return not pdf.err