# -*- coding: utf-8 -*-
#Copyright (c) 2011 Walter Bender

# 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 3 of the License, or
# (at your option) any later version.
#
# You should have received a copy of the GNU General Public License
# along with this library; if not, write to the Free Software
# Foundation, 51 Franklin Street, Suite 500 Boston, MA 02110-1335 USA


import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gdk
from gi.repository import GdkPixbuf
from glib import GError
import os.path
import time
import cairo
from gi.repository import Pango
from gi.repository import PangoCairo
from gettext import gettext as _

from utils import get_pixbuf_from_journal


PAGE_WIDTH = 504
PAGE_HEIGHT = 648
LEFT_MARGIN = 10
TOP_MARGIN = 20


def save_pdf(activity, nick, description=None):
    ''' Output a PDF document from the title, pictures, and descriptions '''

    if len(activity.dsobjects) == 0:
        return None

    head = activity.title_size
    body = activity.desc_size / 2

    tmp_file = os.path.join(activity.datapath, 'output.pdf')
    pdf_surface = cairo.PDFSurface(tmp_file, 504, 648)

    fd = Pango.FontDescription('Sans')
    cr = cairo.Context(pdf_surface)
    cr.set_source_rgb(0, 0, 0)

    show_text(cr, fd, nick, head, LEFT_MARGIN, TOP_MARGIN)
    show_text(cr, fd, time.strftime('%x', time.localtime()),
              body, LEFT_MARGIN, TOP_MARGIN + 3 * head)
    if description is not None:
        show_text(cr, fd, description,
                  body, LEFT_MARGIN, TOP_MARGIN + 4 * head)
    cr.show_page()

    for i, dsobj in enumerate(activity.dsobjects):
        if dsobj.metadata['keep'] == '0':
            continue
        if 'title' in dsobj.metadata:
            show_text(cr, fd, dsobj.metadata['title'], head, LEFT_MARGIN,
                      TOP_MARGIN)
        else:
            show_text(cr, fd, _('untitled'), head, LEFT_MARGIN,
                      TOP_MARGIN)

        w = 0
        h = 0
        pixbuf = None
        if os.path.exists(dsobj.file_path):
            print dsobj.file_path
            try:
                w = int(PAGE_WIDTH - LEFT_MARGIN * 2)
                h = int(w * 3 / 4)
                pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_size(
                    dsobj.file_path, w, h)
            except: # (GError, IOError):
                try:
                    w = 300
                    h = 225
                    pixbuf = get_pixbuf_from_journal(dsobj, w, h)
                except: # (GError, IOError):
                    pass

        if pixbuf is not None:
            cr.save()
            Gdk.cairo_set_source_pixbuf(
                cr, pixbuf, LEFT_MARGIN, TOP_MARGIN + 150)
            cr.rectangle(LEFT_MARGIN, TOP_MARGIN + 150, w, h)
            cr.fill()
            cr.restore()

        if 'description' in dsobj.metadata:
            show_text(cr, fd, dsobj.metadata['description'], body,
                      LEFT_MARGIN, h + 175)
        cr.show_page()

    return tmp_file


def show_text(cr, fd, label, size, x, y):
    pl = PangoCairo.create_layout(cr)
    fd.set_size(int(size * Pango.SCALE))
    pl.set_font_description(fd)
    if type(label) == str or type(label) == unicode:
        pl.set_text(label.replace('\0', ' '), -1)
    else:
        pl.set_text(str(label), -1)
    pl.set_width((PAGE_WIDTH - LEFT_MARGIN * 2) * Pango.SCALE)
    cr.save()
    cr.translate(x, y)
    PangoCairo.update_layout(cr, pl)
    PangoCairo.show_layout(cr, pl)
    cr.restore()