import sqlite3
import os
import logging
from os.path import dirname as dn
from datetime import datetime
import crypt

log = logging.getLogger(__name__)
ROOT = dn(dn(dn(os.path.realpath(__file__))))

def get_sqlite_conn_cur():
    conn = sqlite3.connect(os.path.join(ROOT, 'auth.sqlite'))
    cur = conn.cursor()
    return conn, cur


def admin_auth(username, password):
    conn, cur = get_sqlite_conn_cur()
    password_crypt = crypt.crypt(password, '6a')

    try:
        cur.execute("SELECT * FROM users WHERE username=?", (username,))
        data = cur.fetchone()
    except sqlite3.OperationalError as e:
        data = None
        log.error(e)
        
    if data:
        if data[3]:
            if data[1] == username and data[2] == password_crypt and data[4]:
                log.info('user %s authenticated correctly', username)
                return True
        else:
            log.error('user %s is disabled', username)
            
    return False

def authfunc(environ, username, password):
    conn, cur = get_sqlite_conn_cur()
    password_crypt = crypt.crypt(password, '6a')

    try:
        cur.execute("SELECT * FROM users WHERE username=?", (username,))
        data = cur.fetchone()
    except sqlite3.OperationalError as e:
        data = None
        log.error(e)
    if data:
        if data[3]:
            if data[1] == username and data[2] == password_crypt:
                log.info('user %s authenticated correctly', username)
                if environ:
                    http_accept = environ.get('HTTP_ACCEPT')
            
                    if http_accept.startswith('application/mercurial') or \
                        environ['PATH_INFO'].find('raw-file') != -1:
                        cmd = environ['PATH_INFO']
                        for qry in environ['QUERY_STRING'].split('&'):
                            if qry.startswith('cmd'):
                                cmd += "|" + qry
                                
                                try:
                                    cur.execute('''INSERT INTO 
                                                        user_logs 
                                                   VALUES(?,?,?,?)''',
                                                    (None, data[0], cmd, datetime.now()))
                                    conn.commit()
                                except Exception as e:
                                    conn.rollback()
                                    log.error(e)
                                  
                return True
        else:
            log.error('user %s is disabled', username)
            
    return False

def create_user_table():
    '''
    Create a auth database
    '''
    conn, cur = get_sqlite_conn_cur()
    try:
        log.info('creating table %s', 'users')
        cur.execute('''DROP TABLE IF EXISTS users ''')
        cur.execute('''CREATE TABLE users
                        (user_id INTEGER PRIMARY KEY AUTOINCREMENT, 
                         username TEXT, 
                         password TEXT,
                         active INTEGER,
                         admin INTEGER)''')
        log.info('creating table %s', 'user_logs')
        cur.execute('''DROP TABLE IF EXISTS user_logs ''')
        cur.execute('''CREATE TABLE user_logs
                        (id INTEGER PRIMARY KEY AUTOINCREMENT,
                            user_id INTEGER,
                            last_action TEXT, 
                            last_action_date DATETIME)''')
        conn.commit()
    except:
        conn.rollback()
        raise
    
    cur.close()
    
def create_user(username, password, admin=False):
    conn, cur = get_sqlite_conn_cur()    
    password_crypt = crypt.crypt(password, '6a')
    log.info('creating user %s', username)
    try:
        cur.execute('''INSERT INTO users values (?,?,?,?,?) ''',
                    (None, username, password_crypt, 1, admin))     
        conn.commit()
    except:
        conn.rollback()
        raise
    
if __name__ == "__main__":
    create_user_table()
    create_user('marcink', 'qweqwe', True)
    create_user('lukaszd', 'qweqwe')
    create_user('adriand', 'qweqwe')
    create_user('radek', 'qweqwe')
    create_user('skrzeka', 'qweqwe')
    create_user('bart', 'qweqwe')
    create_user('maho', 'qweqwe')
    create_user('michalg', 'qweqwe')
    
    #authfunc('', 'marcink', 'qweqwe')