# -*- coding: UTF-8 -*-
#
#       tablez.py
#       
#       Copyright 2009-2011 Giuseppe Penone <giuspen@gmail.com>
#       
#       This program is free software; you can redistribute it and/or modify
#       it under the terms of the GNU General Public License as published by
#       the Free Software Foundation; either version 2 of the License, or
#       (at your option) any later version.
#       
#       This program is distributed in the hope that it will be useful,
#       but WITHOUT ANY WARRANTY; without even the implied warranty of
#       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#       GNU General Public License for more details.
#       
#       You should have received a copy of the GNU General Public License
#       along with this program; if not, write to the Free Software
#       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#       MA 02110-1301, USA.

import gtk, pango
import os, csv, codecs, cStringIO
import support


class TablesHandler:
   """Handler of the Tables"""
   
   def __init__(self, dad):
      """Lists Handler boot"""
      self.dad = dad
      
   def table_cut(self, *args):
      """Cut Table"""
      self.dad.object_set_selection(self.curr_table_anchor)
      self.dad.sourceview.emit("cut-clipboard")
   
   def table_copy(self, *args):
      """Copy Table"""
      self.dad.object_set_selection(self.curr_table_anchor)
      self.dad.sourceview.emit("copy-clipboard")
   
   def table_delete(self, *args):
      """Delete Table"""
      self.dad.object_set_selection(self.curr_table_anchor)
      self.dad.curr_buffer.delete_selection(True, self.dad.sourceview.get_editable())
      self.dad.sourceview.grab_focus()
      
   def on_key_press_tablehandledialog(self, widget, event):
      """Catches TableHandle Dialog key presses"""
      keyname = gtk.gdk.keyval_name(event.keyval)
      if keyname == "Return": self.dad.glade.tablehandledialog_button_ok.clicked()
      
   def table_export(self, action):
      """Table Export as CSV File"""
      filename = support.dialog_file_save_as(curr_folder=self.dad.pick_dir,
                                             filter_pattern="*.csv",
                                             filter_name=_("CSV File"),
                                             parent=self.dad.window)
      if filename == None: return
      if not os.path.isfile(filename)\
      or support.dialog_question(_("The File %s\nAlready Exists, do you want to Overwrite?") % filename, self.dad.window):
         if len(filename) < 4 or filename[-4:] != ".csv": filename += ".csv"
         self.dad.pick_dir = os.path.dirname(filename)
         table_dict = self.dad.state_machine.table_to_dict(self.curr_table_anchor)
         table_matrix = table_dict['matrix']
         table_matrix.insert(0, table_matrix.pop())
         file_descriptor = open(filename, "w")
         writer = UnicodeWriter(file_descriptor)
         writer.writerows(table_matrix)
         file_descriptor.close()
   
   def table_handle(self):
      """Insert Table"""
      iter_insert = self.dad.curr_buffer.get_iter_at_mark(self.dad.curr_buffer.get_insert())
      self.dad.glade.tablehandledialog.set_title(_("Insert Table"))
      self.dad.glade.tablehandle_frame_table.show()
      self.dad.glade.tablehandle_frame_col.show()
      self.dad.glade.checkbutton_table_ins_from_file.set_active(False)
      self.dad.glade.checkbutton_table_ins_from_file.show()
      self.dad.glade.tablehandle_vbox_col.hide()
      response = self.dad.glade.tablehandledialog.run()
      self.dad.glade.tablehandledialog.hide()
      if response != 1: return
      if not self.dad.glade.checkbutton_table_ins_from_file.get_active():
         self.table_rows = int(self.dad.glade.spinbutton_table_rows.get_value())
         self.table_columns = int(self.dad.glade.spinbutton_table_columns.get_value())
         self.table_col_min = int(self.dad.glade.spinbutton_table_col_min.get_value())
         self.table_col_max = int(self.dad.glade.spinbutton_table_col_max.get_value())
         self.table_insert(iter_insert)
      else:
         filepath = support.dialog_file_select(filter_pattern="*.csv",
                                               filter_name=_("CSV File"),
                                               curr_folder=self.dad.pick_dir,
                                               parent=self.dad.window)
         if filepath != None:
            self.dad.pick_dir = os.path.dirname(filepath)
            file_descriptor = open(filepath, "r")
            reader = UnicodeReader(file_descriptor)
            table_matrix = []
            row = reader.next()
            while row:
               table_matrix.append(row)
               row = reader.next()
            file_descriptor.close()
            table_matrix.append(table_matrix.pop(0))
            self.table_insert(iter_insert, {'col_min': 40, 'col_max': 1000, 'matrix': table_matrix})
   
   def table_insert(self, iter_insert, table=None, table_justification=None):
      """Insert a Table at the Given Iter"""
      if table != None:
         self.table_columns = len(table['matrix'][0])
         self.table_rows = len(table['matrix']) - 1
         headers = table['matrix'][-1]
         table_col_min = table['col_min']
         table_col_max = table['col_max']
      else:
         headers = [_("click me")]*self.table_columns
         table_col_min = self.table_col_min
         table_col_max = self.table_col_max
      anchor = self.dad.curr_buffer.create_child_anchor(iter_insert)
      anchor.liststore = gtk.ListStore(*(str,)*self.table_columns)
      anchor.treeview = gtk.TreeView(anchor.liststore)
      self.dad.sourceview.add_child_at_anchor(anchor.treeview, anchor)
      for element in range(self.table_columns):
         label = gtk.Label('<b>' + headers[element] + '</b>')
         label.set_use_markup(True)
         label.set_tooltip_text(_("Click to Edit the Column Settings"))
         label.show()
         renderer_text = gtk.CellRendererText()
         renderer_text.set_property('editable', True)
         renderer_text.set_property('wrap-width', table_col_max)
         renderer_text.set_property('wrap-mode', pango.WRAP_WORD_CHAR)
         renderer_text.set_property('font-desc', pango.FontDescription(self.dad.text_font))
         renderer_text.connect('edited', self.table_cell_edited, anchor.liststore, element)
         column = gtk.TreeViewColumn("", renderer_text, text=element)
         column.set_min_width(table_col_min)
         column.set_clickable(True)
         column.set_widget(label)
         column.set_sizing(gtk.TREE_VIEW_COLUMN_AUTOSIZE)
         column.connect('clicked', self.table_column_clicked, anchor, element)
         anchor.treeview.append_column(column)
      anchor.headers = headers
      anchor.table_col_min = table_col_min
      anchor.table_col_max = table_col_max
      anchor.treeview.set_grid_lines(gtk.TREE_VIEW_GRID_LINES_BOTH)
      anchor.treeview.connect('button-press-event', self.on_mouse_button_clicked_table, anchor)
      anchor.treeview.show_all()
      for row in range(self.table_rows):
         row_iter = anchor.liststore.append([""]*self.table_columns)
         if table != None:
            for column in range(self.table_columns):
               anchor.liststore[row_iter][column] = table['matrix'][row][column]
      if table_justification:
         self.dad.state_machine.apply_image_justification(self.dad.curr_buffer.get_iter_at_child_anchor(anchor), table_justification)
      
   def table_edit_properties(self, *args):
      """Edit Table Properties"""
      self.table_col_min = self.curr_table_anchor.table_col_min
      self.table_col_max = self.curr_table_anchor.table_col_max
      self.dad.glade.spinbutton_table_col_min.set_value(self.curr_table_anchor.table_col_min)
      self.dad.glade.spinbutton_table_col_max.set_value(self.curr_table_anchor.table_col_max)
      self.dad.glade.tablehandledialog.set_title(_("Edit Table Properties"))
      self.dad.glade.tablehandle_frame_table.hide()
      self.dad.glade.tablehandle_frame_col.show()
      self.dad.glade.tablehandle_vbox_col.hide()
      self.dad.glade.checkbutton_table_ins_from_file.hide()
      self.dad.glade.tablehandle_frame_col.set_sensitive(True)
      response = self.dad.glade.tablehandledialog.run()
      self.dad.glade.tablehandledialog.hide()
      if response != 1: return
      self.table_col_min = int(self.dad.glade.spinbutton_table_col_min.get_value())
      table = self.dad.state_machine.table_to_dict(self.curr_table_anchor)
      self.table_col_max = int(self.dad.glade.spinbutton_table_col_max.get_value())
      table['col_min'] = self.table_col_min
      table['col_max'] = self.table_col_max
      iter_insert = self.dad.curr_buffer.get_iter_at_child_anchor(self.curr_table_anchor)
      table_justification = self.dad.state_machine.get_iter_alignment(iter_insert)
      iter_bound = iter_insert.copy()
      iter_bound.forward_char()
      self.dad.curr_buffer.delete(iter_insert, iter_bound)
      self.table_insert(iter_insert, table, table_justification)
      
   def table_cell_edited(self, cell, path, new_text, model, col_num):
      """A Table Cell is going to be Edited"""
      model[path][col_num] = new_text
      self.dad.state_machine.update_state(self.dad.treestore[self.dad.curr_tree_iter][3])
      self.dad.update_window_save_needed()
      
   def table_column_clicked(self, column, anchor, col_num):
      """The Column Header was Clicked"""
      self.dad.glade.tablehandledialog.set_title(_("Table Column Action"))
      self.dad.glade.tablehandle_frame_table.hide()
      self.dad.glade.tablehandle_frame_col.hide()
      self.dad.glade.checkbutton_table_ins_from_file.hide()
      self.dad.glade.tablehandle_vbox_col.show()
      col_label = column.get_widget()
      self.dad.glade.table_column_rename_entry.set_text(col_label.get_text())
      self.dad.glade.table_column_new_entry.set_sensitive(self.dad.table_column_mode == 'add')
      self.dad.glade.table_column_rename_entry.set_sensitive(self.dad.table_column_mode == 'rename')
      response = self.dad.glade.tablehandledialog.run()
      self.dad.glade.tablehandledialog.hide()
      if response != 1: return
      table = self.dad.state_machine.table_to_dict(anchor)
      headers = table['matrix'].pop()
      if (self.dad.table_column_mode == 'right' and col_num == len(headers)-1)\
      or (self.dad.table_column_mode == 'left' and col_num == 0):
         return
      iter_insert = self.dad.curr_buffer.get_iter_at_child_anchor(anchor)
      table_justification = self.dad.state_machine.get_iter_alignment(iter_insert)
      iter_bound = iter_insert.copy()
      iter_bound.forward_char()
      self.dad.curr_buffer.delete(iter_insert, iter_bound)
      if self.dad.table_column_mode == 'rename':
         new_label = self.dad.glade.table_column_rename_entry.get_text()
         col_label.set_text("<b>" + new_label + "</b>")
         col_label.set_use_markup(True)
         headers[col_num] = new_label
      elif self.dad.table_column_mode == 'add':
         headers.insert(col_num + 1, self.dad.glade.table_column_new_entry.get_text())
         for row in table['matrix']: row.insert(col_num + 1, "")
      elif self.dad.table_column_mode == 'delete':
         headers.pop(col_num)
         for row in table['matrix']: row.pop(col_num)
      elif self.dad.table_column_mode == 'right':
         temp = headers.pop(col_num)
         headers.insert(col_num + 1, temp)
         for row in table['matrix']:
            temp = row.pop(col_num)
            row.insert(col_num + 1, temp)
      elif self.dad.table_column_mode == 'left':
         temp = headers.pop(col_num)
         headers.insert(col_num - 1, temp)
         for row in table['matrix']:
            temp = row.pop(col_num)
            row.insert(col_num - 1, temp)
      table['matrix'].append(headers)
      self.table_insert(iter_insert, table, table_justification)
      
   def table_row_action(self, action):
      """All Rows Actions"""
      treeviewselection = self.curr_table_anchor.treeview.get_selection()
      model, iter = treeviewselection.get_selected()
      if action == "delete": model.remove(iter)
      elif action == "add": model.insert_after(iter, [""]*len(self.curr_table_anchor.headers))
      elif action == "move_up":
         prev_iter = self.dad.get_tree_iter_prev_sibling(model, iter)
         if prev_iter == None: return
         model.swap(iter, prev_iter)
         self.curr_table_anchor.treeview.set_cursor(model.get_path(iter))
      elif action == "move_down":
         subseq_iter = model.iter_next(iter)
         if subseq_iter == None: return
         model.swap(iter, subseq_iter)
      elif action == "sort_desc":
         father_iter = model.iter_parent(iter)
         movements = False
         while self.dad.node_siblings_sort_iteration(model, father_iter, True, 0):
            movements = True
         if not movements: return
      elif action == "sort_asc":
         father_iter = model.iter_parent(iter)
         movements = False
         while self.dad.node_siblings_sort_iteration(model, father_iter, False, 0):
            movements = True
         if not movements: return
      else: return
      self.dad.update_window_save_needed()
      self.dad.state_machine.update_state(self.dad.treestore[self.dad.curr_tree_iter][3])
   
   def table_row_add(self, *args):
      """Add a Table Row"""
      self.table_row_action("add")
   
   def table_row_delete(self, *args):
      """Delete a Table Row"""
      self.table_row_action("delete")
   
   def table_row_up(self, *args):
      """Move the Selected Row Up"""
      self.table_row_action("move_up")
   
   def table_row_down(self, *args):
      """Move the Selected Row Down"""
      self.table_row_action("move_down")
   
   def table_rows_sort_descending(self, *args):
      """Sort all the Rows Descending"""
      self.table_row_action("sort_desc")
   
   def table_rows_sort_ascending(self, *args):
      """Sort all the Rows Ascending"""
      self.table_row_action("sort_asc")
      
   def on_mouse_button_clicked_table(self, widget, event, anchor):
      """Catches mouse buttons clicks"""
      self.curr_table_anchor = anchor
      self.dad.object_set_selection(self.curr_table_anchor)
      if event.button == 3:
         self.dad.ui.get_widget("/TableMenu").popup(None, None, None, event.button, event.time)
   

class UTF8Recoder:
   """
   Iterator that reads an encoded stream and reencodes the input to UTF-8
   """
   def __init__(self, f, encoding):
      self.reader = codecs.getreader(encoding)(f)

   def __iter__(self):
      return self

   def next(self):
      return self.reader.next().encode("utf-8")


class UnicodeReader:
   """
   A CSV reader which will iterate over lines in the CSV file "f",
   which is encoded in the given encoding.
   """
   def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
      f = UTF8Recoder(f, encoding)
      self.reader = csv.reader(f, dialect=dialect, **kwds)
   
   def next(self):
      try:
         row = self.reader.next()
         return [unicode(s, "utf-8") for s in row]
      except: return None
   
   def __iter__(self):
      return self


class UnicodeWriter:
   """
   A CSV writer which will write rows to CSV file "f",
   which is encoded in the given encoding.
   """
   
   def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
      # Redirect output to a queue
      self.queue = cStringIO.StringIO()
      self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
      self.stream = f
      self.encoder = codecs.getincrementalencoder(encoding)()
   
   def writerow(self, row):
      self.writer.writerow([s.encode("utf-8") for s in row])
      # Fetch UTF-8 output from the queue ...
      data = self.queue.getvalue()
      data = data.decode("utf-8")
      # ... and reencode it into the target encoding
      data = self.encoder.encode(data)
      # write to the target stream
      self.stream.write(data)
      # empty queue
      self.queue.truncate(0)
   
   def writerows(self, rows):
      for row in rows:
         self.writerow(row)
