# -*- coding: utf-8 -*-

'''

Created on Feb 22, 2015

@author: ymh

'''

import logging

import os

from django.conf import settings

from django.core.urlresolvers import reverse

from django.db import transaction

from hdalab.models.renkan import HdalabRenkanStateTransition

from subprocess import check_call

logger = logging.getLogger(__name__)

@transaction.atomic

def change_renkan_state(hda_renkan, state, message=None, author=None):

    if state != hda_renkan.state:

        HdalabRenkanStateTransition.objects.create(renkan=hda_renkan, from_state=hda_renkan.state, to_state=state, message=message, author=author)

        hda_renkan.state = state

        hda_renkan.save()

def renkan_capture_preview(hdalab_renkan):

    #get last state date or last modification date

    #states are ordered by ts

    folder_date = hdalab_renkan.renkan.modification_date

    states = hdalab_renkan.states

    state = None

    if states.count() > 0:

        state = states.all()[0]

    if state:

        folder_date =  state.ts

    rel_export_path_dir = "thumbnails/renkan/%04d/%02d/%02d" % (folder_date.year, folder_date.month, folder_date.day)

    export_path_dir = os.path.join(settings.MEDIA_ROOT,rel_export_path_dir)

    export_filename = "%s.png" % hdalab_renkan.renkan.rk_id

    export_path = os.path.join(export_path_dir, export_filename)

    rel_export_path = os.path.join(rel_export_path_dir, export_filename)

    if not os.path.exists(export_path_dir):

            try:

                os.makedirs(export_path_dir)

            except OSError, e:

                if e.errno != 17:

                    raise   

                # time.sleep might help here

                pass

    preview_dim = getattr(settings, 'RENKAN_PREVIEW_DIM', (500,500))

    preview_wait = getattr(settings, 'RENKAN_PREVIEW_WAIT', 5000)

    preview_args = [

        getattr(settings,'RENKAN_PREVIEW_PHANTOMJS_PATH','phantomjs'),

        os.path.join(os.path.dirname(os.path.abspath(__file__)),'scripts/capture-phantomjs.js'),

        "%s%shdalab%s?rk_id=%s" % (settings.WEB_URL, settings.BASE_URL, reverse('renkan_full'),hdalab_renkan.renkan.rk_id),

        export_path,

        "--width=%d" % preview_dim[0],

        "--height=%d" % preview_dim[1],

        "--wait=%d" % preview_wait

    ]

    check_call(preview_args)

    hdalab_renkan.renkan.image = rel_export_path

    hdalab_renkan.renkan.save()