"""
Seen - track when a person speaks, and allow data to be queried
Copyright (C) 2010  Brian S. Stephan

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.

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, see <http://www.gnu.org/licenses/>.
"""

import re
import sqlite3

from datetime import datetime
from dateutil.tz import *
from extlib import irclib

from Module import Module

class Seen(Module):

    """Track when people say things in public channels, and report on it."""

    def db_init(self):
        """Create the table to store seen data."""

        version = self.db_module_registered(self.__class__.__name__)
        if version == None:
            db = self.get_db()
            try:
                db.execute('''
                    CREATE TABLE seen_nicks (
                        nick TEXT NOT NULL PRIMARY KEY,
                        host TEXT NOT NULL,
                        time TEXT DEFAULT CURRENT_TIMESTAMP,
                        what TEXT NOT NULL
                    )''')
                sql = 'INSERT INTO drbotzo_modules VALUES (?,?)'
                db.execute(sql, (self.__class__.__name__, 1))
                db.commit()
                db.close()
                version = 1
            except sqlite3.Error as e:
                db.rollback()
                db.close()
                self.log.error("sqlite error: " + str(e))
                raise
        if version < 2:
            db = self.get_db()
            try:
                version = 2
                db.execute('''DROP TABLE seen_nicks''')
                db.execute('''
                    CREATE TABLE seen_nicks (
                        nick TEXT NOT NULL,
                        location TEXT NOT NULL,
                        host TEXT NOT NULL,
                        time TEXT DEFAULT CURRENT_TIMESTAMP,
                        what TEXT NOT NULL
                    )''')
                db.execute('''
                    CREATE UNIQUE INDEX seen_nicks_nick_and_location_index
                        ON seen_nicks (nick, location)''')
                db.commit()
                db.close()
                self.db_register_module_version(self.__class__.__name__, version)
            except sqlite3.Error as e:
                db.rollback()
                db.close()
                self.log.error("sqlite error: " + str(e))
                raise

    def do(self, connection, event, nick, userhost, what, admin_unlocked):
        """Track pubmsg/privmsg events, and if asked, report on someone."""

        where = event.target()

        # whatever it is, store it
        try:
            # if there's no where, this is probably a sub-command. don't learn it
            if where:
                db = self.get_db()
                cur = db.cursor()
                statement = 'REPLACE INTO seen_nicks (nick, location, host, what) VALUES (?, ?, ?, ?)'
                cur.execute(statement, (nick, where, userhost, what.decode('utf-8', 'replace')))
                db.commit()
                db.close()
        except sqlite3.Error as e:
            db.rollback()
            db.close()
            self.log.error("sqlite error: " + str(e))
            raise

        match = re.search('^!seen\s+(\S+)$', what)
        if match:
            nick = match.group(1)
            try:
                db = self.get_db()
                query = 'SELECT * FROM seen_nicks WHERE nick = ? AND location = ?'
                cursor = db.execute(query, (nick,where))
                result = cursor.fetchone()
                db.close()
                if result:
                    seentime = datetime.strptime(result['time'], '%Y-%m-%d %H:%M:%S').replace(tzinfo=tzutc())
                    replystr = 'last saw {0:s} in {3:s} at {1:s} saying \'{2:s}\'.'.format(result['nick'], seentime.astimezone(tzlocal()).strftime('%Y/%m/%d %H:%M:%S %Z'), result['what'].encode('utf-8', 'ignore'), result['location'].encode('utf-8', 'ignore'))
                    return self.reply(connection, event, replystr)
                else:
                    return self.reply(connection, event, 'i have not seen {0:s} in {1:s}.'.format(nick, where))
            except sqlite3.Error as e:
                db.rollback()
                db.close()
                self.log.error("sqlite error: " + str(e))
                raise

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