# -*- coding: utf-8 -*-
import datetime
from django.db import connections
from south.db import db
from south.v2 import DataMigration
from django.db import models

class Migration(DataMigration):

    def forwards(self, orm):
        # Selecting trac database
        connection = connections['trac']

        cursor = connection.cursor()
        cursor.execute('''
            CREATE OR REPLACE VIEW wiki_view AS SELECT
                wiki.name AS name,
                (SELECT wiki2.text FROM wiki AS wiki2 WHERE wiki2.name = wiki.name
                 AND wiki2.version = MAX(wiki.version)) AS wiki_text,
                (SELECT wiki3.author FROM wiki AS wiki3 WHERE wiki3.name = wiki.name
                 AND wiki3.version = 1) AS author,
                string_agg(DISTINCT wiki.author, ', ') AS collaborators,
                TIMESTAMP WITH TIME ZONE 'epoch' + (MIN(wiki.time)/1000000) * INTERVAL '1s' AS created,
                TIMESTAMP WITH TIME ZONE 'epoch' + (MAX(wiki.time)/1000000) * INTERVAL '1s' AS modified,
                (SELECT wiki4.author FROM wiki AS wiki4 WHERE wiki4.name = wiki.name
                 AND wiki4.version = MAX(wiki.version)) AS modified_by
            FROM wiki
            GROUP BY wiki.name;

            CREATE OR REPLACE VIEW ticket_view AS SELECT
                ticket.id AS id,
                ticket.summary as summary,
                ticket.description as description,
                ticket.milestone as milestone,
                ticket.priority as priority,
                ticket.component as component,
                ticket.version as version,
                ticket.severity as severity,
                ticket.reporter as reporter,
                ticket.reporter as author,
                ticket.status as status,
                ticket.keywords as keywords,
                (SELECT
                    string_agg(DISTINCT ticket_change.author, ', ')
                    FROM ticket_change WHERE ticket_change.ticket = ticket.id
                    GROUP BY ticket_change.ticket) as collaborators,
                TIMESTAMP WITH TIME ZONE 'epoch' + (time/1000000)* INTERVAL '1s' AS created,
                TIMESTAMP WITH TIME ZONE 'epoch' + (changetime/1000000) * INTERVAL '1s' AS modified,
                (SELECT
                    ticket_change.author
                 FROM ticket_change
                 WHERE ticket_change.ticket = ticket.id
                    AND ticket_change.time = ticket.changetime
                 LIMIT 1
                ) AS modified_by
            FROM ticket;
	    ''')


    def backwards(self, orm):
        # Selecting trac database
        connection = connections['trac']

        cursor = connection.cursor()
        cursor.execute('''
            ALTER VIEW wiki_view ALTER COLUMN modified_by DROP DEFAULT;
            ALTER VIEW ticket_view ALTER COLUMN modified_by DROP DEFAULT;
	    ''')


    models = {
        u'proxy.attachment': {
            'Meta': {'object_name': 'Attachment', 'db_table': "'attachment_view'", 'managed': 'False'},
            'attach_id': ('django.db.models.fields.TextField', [], {}),
            'author': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'created': ('django.db.models.fields.DateTimeField', [], {'blank': 'True'}),
            'description': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'filename': ('django.db.models.fields.TextField', [], {}),
            'mimetype': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'size': ('django.db.models.fields.IntegerField', [], {'blank': 'True'}),
            'url': ('django.db.models.fields.TextField', [], {'primary_key': 'True'}),
            'used_by': ('django.db.models.fields.TextField', [], {})
        },
        u'proxy.revision': {
            'Meta': {'object_name': 'Revision', 'db_table': "'revision_view'", 'managed': 'False'},
            'author': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'created': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'key': ('django.db.models.fields.TextField', [], {'primary_key': 'True'}),
            'message': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'repository_name': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'rev': ('django.db.models.fields.TextField', [], {'blank': 'True'})
        },
        u'proxy.ticket': {
            'Meta': {'object_name': 'Ticket', 'db_table': "'ticket_view'", 'managed': 'False'},
            'author': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'collaborators': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'component': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'created': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'description': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'id': ('django.db.models.fields.IntegerField', [], {'primary_key': 'True'}),
            'keywords': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'milestone': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'modified': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'modified_by': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'priority': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'reporter': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'severity': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'status': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'summary': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'version': ('django.db.models.fields.TextField', [], {'blank': 'True'})
        },
        u'proxy.wiki': {
            'Meta': {'object_name': 'Wiki', 'db_table': "'wiki_view'", 'managed': 'False'},
            'author': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'collaborators': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'created': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'modified': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'modified_by': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
            'name': ('django.db.models.fields.TextField', [], {'primary_key': 'True'}),
            'wiki_text': ('django.db.models.fields.TextField', [], {'blank': 'True'})
        }
    }

    complete_apps = ['proxy']
    symmetrical = True