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

# Copyright(C) 2010-2011 Romain Bignon
#
# This file is part of weboob.
#
# weboob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# weboob 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with weboob. If not, see <http://www.gnu.org/licenses/>.


import re
import datetime

from weboob.capabilities.bugtracker import IssueError
from weboob.tools.browser import BasePage, BrokenPageError
from weboob.tools.misc import to_unicode
from weboob.tools.mech import ClientForm


class BaseIssuePage(BasePage):
    def parse_datetime(self, text):
        m = re.match('(\d+)/(\d+)/(\d+) (\d+):(\d+) (\w+)', text)
        if m:
            date = datetime.datetime(int(m.group(3)),
                                     int(m.group(1)),
                                     int(m.group(2)),
                                     int(m.group(4)),
                                     int(m.group(5)))
            if m.group(6) == 'pm':
                date += datetime.timedelta(0,12*3600)
            return date

        m = re.match('(\d+)-(\d+)-(\d+) (\d+):(\d+)', text)
        if m:
            return datetime.datetime(int(m.group(1)),
                                     int(m.group(2)),
                                     int(m.group(3)),
                                     int(m.group(4)),
                                     int(m.group(5)))

        self.logger.warning('Unable to parse "%s"' % text)
        return text

    PROJECT_FIELDS = {'members':    'values_assigned_to_id',
                      'categories': 'values_category_id',
                      'versions':   'values_fixed_version_id',
                      'statuses':   'values_status_id',
                     }

    def iter_choices(self, name):
        try:
            select = self.parser.select(self.document.getroot(), 'select#%s' % name, 1)
        except BrokenPageError:
            return
        for option in select.findall('option'):
            if option.attrib['value'].isdigit():
                yield (option.attrib['value'], option.text)

    def get_project(self, project_name):
        project = {}
        project['name'] = project_name
        for field, elid in self.PROJECT_FIELDS.iteritems():
            project[field] = list(self.iter_choices(elid))
        return project

    def get_authenticity_token(self):
        tokens = self.parser.select(self.document.getroot(), 'input[name=authenticity_token]')
        if len(tokens) == 0:
            raise IssueError("You doesn't have rights to remove this issue.")

        token = tokens[0].attrib['value']
        return token


class IssuesPage(BaseIssuePage):
    PROJECT_FIELDS = {'members':    'values_assigned_to_id',
                      'categories': 'values_category_id',
                      'versions':   'values_fixed_version_id',
                      'statuses':   'values_status_id',
                     }

    def iter_issues(self):
        try:
            issues = self.parser.select(self.document.getroot(), 'table.issues', 1)
        except BrokenPageError:
            # No results.
            return

        for tr in issues.getiterator('tr'):
            if not tr.attrib.get('id', '').startswith('issue-'):
                continue
            issue = {}
            for td in tr.getiterator('td'):
                field = td.attrib.get('class', '')
                if field in ('checkbox','todo',''):
                    continue

                a = td.find('a')
                if a is not None:
                    if a.attrib['href'].startswith('/users/') or \
                       a.attrib['href'].startswith('/versions/'):
                        text = (int(a.attrib['href'].split('/')[-1]), a.text)
                    else:
                        text = a.text
                else:
                    text = td.text

                if field.endswith('_on'):
                    text = self.parse_datetime(text)
                elif field.endswith('_date') and text is not None:
                    m = re.match('(\d+)-(\d+)-(\d+)', text)
                    if m:
                        text = datetime.datetime(int(m.group(1)),
                                                 int(m.group(2)),
                                                 int(m.group(3)))

                if isinstance(text, str):
                    text = to_unicode(text)
                issue[field] = text

            if len(issue) != 0:
                yield issue


class NewIssuePage(BaseIssuePage):
    PROJECT_FIELDS = {'members':    'issue_assigned_to_id',
                      'categories': 'issue_category_id',
                      'versions':   'issue_fixed_version_id',
                      'statuses':   'issue_status_id',
                     }

    def set_title(self, title):
        self.browser['issue[subject]'] = title.encode('utf-8')

    def set_body(self, body):
        self.browser['issue[description]'] = body.encode('utf-8')

    def set_assignee(self, member):
        if member:
            self.browser['issue[assigned_to_id]'] = [str(member)]
        else:
            self.browser['issue[assigned_to_id]'] = ['']

    def set_version(self, version):
        try:
            if version:
                self.browser['issue[fixed_version_id]'] = [str(version)]
            else:
                self.browser['issue[fixed_version_id]'] = ['']
        except ClientForm.ItemNotFoundError:
            self.logger.warning('Version not found: %s' % version)

    def set_category(self, category):
        if category:
            select = self.parser.select(self.document.getroot(), 'select#issue_category_id', 1)
            for option in select.findall('option'):
                if option.text and option.text.strip() == category:
                    self.browser['issue[category_id]'] = [option.attrib['value']]
                    return
            self.logger.warning('Category "%s" not found' % category)
        else:
            self.browser['issue[category_id]'] = ['']

    def set_status(self, status):
        assert status is not None
        self.browser['issue[status_id]'] = [str(status)]

    def set_note(self, message):
        self.browser['notes'] = message.encode('utf-8')

    def fill_form(self, **kwargs):
        self.browser.select_form(predicate=lambda form: form.attrs.get('id', '') == 'issue-form')
        for key, value in kwargs.iteritems():
            if value is not None:
                getattr(self, 'set_%s' % key)(value)
        self.browser.submit()


class IssuePage(NewIssuePage):
    def _parse_selection(self, id):
        try:
            select = self.parser.select(self.document.getroot(), 'select#%s' % id, 1)
        except BrokenPageError:
            # not available for this project
            return ('', None)
        else:
            options = select.findall('option')
            for option in options:
                if 'selected' in option.attrib:
                    return (int(option.attrib['value']), to_unicode(option.text))
            return ('', None)

    def get_params(self):
        params = {}
        content = self.parser.select(self.document.getroot(), 'div#content', 1)
        issue = self.parser.select(content, 'div.issue', 1)

        params['project'] = self.get_project(to_unicode(self.parser.select(self.document.getroot(), 'h1', 1).text))
        params['subject'] = to_unicode(self.parser.select(issue, 'div.subject', 1).find('div').find('h3').text.strip())
        params['body'] = to_unicode(self.parser.select(self.document.getroot(), 'textarea#issue_description', 1).text)
        author = self.parser.select(issue, 'p.author', 1)

        # check issue 666 on symlink.me
        i = 0
        alist = author.findall('a')
        if not 'title' in alist[i].attrib:
            params['author'] = (int(alist[i].attrib['href'].split('/')[-1]),
                                to_unicode(alist[i].text))
            i += 1
        else:
            params['author'] = (0, 'Anonymous')
        params['created_on'] = self.parse_datetime(alist[i].attrib['title'])
        if len(alist) > i+1:
            params['updated_on'] = self.parse_datetime(alist[i+1].attrib['title'])
        else:
            params['updated_on'] = None

        params['status'] = self._parse_selection('issue_status_id')
        params['assignee'] = self._parse_selection('issue_assigned_to_id')
        params['category'] = self._parse_selection('issue_category_id')
        params['version'] = self._parse_selection('issue_fixed_version_id')

        params['attachments'] = []
        try:
            for p in self.parser.select(content, 'div.attachments', 1).findall('p'):
                attachment = {}
                a = p.find('a')
                attachment['id'] = int(a.attrib['href'].split('/')[-2])
                attachment['filename'] = p.find('a').text
                attachment['url'] = '%s://%s%s' % (self.browser.PROTOCOL, self.browser.DOMAIN, p.find('a').attrib['href'])
                params['attachments'].append(attachment)
        except BrokenPageError:
            pass

        params['updates'] = []
        for div in self.parser.select(content, 'div.journal'):
            update = {}
            update['id'] = div.find('h4').find('div').find('a').text[1:]
            alist = div.find('h4').findall('a')
            if len(alist) == 3:
                update['author'] = (int(alist[-2].attrib['href'].split('/')[-1]),
                                    to_unicode(alist[-2].text))
            else:
                m = re.match('Updated by (.*)', alist[0].tail.strip())
                if m:
                    update['author'] = (0, to_unicode(m.group(1)))
            update['date'] = self.parse_datetime(alist[-1].attrib['title'])
            if div.find('div') is not None:
                comment = div.find('div')
                subdiv = comment.find('div')
                if subdiv is not None:
                    # a subdiv which contains changes is found, move the tail text
                    # of this div to comment text, and remove it.
                    comment.text = (comment.text or '') + (subdiv.tail or '')
                comment.remove(comment.find('div'))
                update['message'] = self.parser.tostring(comment).strip()
            else:
                update['message'] = None

            changes = []
            try:
                details = self.parser.select(div, 'ul.details', 1)
            except BrokenPageError:
                pass
            else:
                for li in details.findall('li'):
                    field = li.find('strong').text.decode('utf-8')
                    i = li.findall('i')
                    new = None
                    last = None
                    if len(i) > 0:
                        if len(i) == 2:
                            last = i[0].text.decode('utf-8')
                        new = i[-1].text.decode('utf-8')
                    elif li.find('strike') is not None:
                        last = li.find('strike').find('i').text.decode('utf-8')
                    elif li.find('a') is not None:
                        new = li.find('a').text.decode('utf-8')
                    else:
                        self.logger.warning('Unable to handle change for %s' % field)
                    changes.append((field, last, new))
            update['changes'] = changes

            params['updates'].append(update)

        return params


class IssueLogTimePage(BasePage):
    def logtime(self, hours, message):
        self.browser.select_form(predicate=lambda form: form.attrs.get('action', '').endswith('/edit'))
        self.browser['time_entry[hours]'] = '%.2f' % hours
        self.browser['time_entry[comments]'] = message.encode('utf-8')
        self.browser['time_entry[activity_id]'] = ['8']
        self.browser.submit()


class IssueTimeEntriesPage(BasePage):
    pass