"""PSLA - Perforce Server Log Analyzer
"""

import os
from flask import Flask, request, redirect, url_for, render_template, flash
from flask_wtf.csrf import CSRFProtect
from werkzeug import secure_filename
from config import Config
from forms import UploadForm
import logging
import pandas as pd
import sqlite3
import traceback

from app import app
from log2sql import Log2sql

UPLOAD_FOLDER = '/logs'
ALLOWED_EXTENSIONS = set(['txt'])

app.config.from_object(Config)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
csrf = CSRFProtect(app)

def allowed_file(filename):
    return True
    return '.' in filename and \
           filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS

class MyOptions():
    def __init__(self, dbname, logfile, sql=False, verbosity=logging.INFO, outlog=None):
        self.dbname = dbname
        self.logfile = logfile
        self.sql = sql
        self.verbosity = verbosity
        self.interval = 10
        self.outlog = outlog
        self.output = None

@app.route('/')
def index():
    """Front page for application"""
    return render_template('index.html')

@app.route('/uploadLog', methods=['GET', 'POST'])
def uploadLog():
    "Upload log file"
    form = UploadForm()
    app.logger.debug("uploadLog: %s" % form.errors)
    app.logger.debug('------ {0}'.format(request.form))
    if form.is_submitted():
        app.logger.debug(form.errors)

    if form.validate():
        app.logger.debug(form.errors)
    app.logger.debug(form.errors)

    if form.validate_on_submit():
        db_folder = app.config['UPLOAD_FOLDER']
        filename = secure_filename(form.uploadFile.data.filename)
        file_path = os.path.join(db_folder, filename)
        form.uploadFile.data.save(file_path)

        os.chdir(db_folder)
        optionsSQL = MyOptions("testdb", [file_path], sql=True, outlog='log.out')
        dbname = "%s.db" % optionsSQL.dbname
        if os.path.exists(dbname):
            os.remove(dbname)
        log2sql = Log2sql(optionsSQL)
        log2sql.processLog()
        msgs = []

        return redirect(url_for('analyzeLog'))
    return render_template('uploadLog.html', title='Upload Log', form=form)

queries = [{'title': 'Count of Cmds',
            'explanation': 'How many commands of each type',
            'sql': """
                select cmd, count(cmd) from process
                group by cmd;
            """},
           {'title': 'Cmds per second',
            'explanation': 'How many commands each second',
            'sql': """
                SELECT SUBSTR(startTime, 0, 19) as timesec, MAX(running)
                FROM process
                GROUP BY timesec;
            """}]

@app.route('/analyzeLog')
def analyzeLog():
    "Access previously uploaded log"
    db_folder = app.config['UPLOAD_FOLDER']
    dbname = os.path.join(db_folder, "testdb.db")
    if not os.path.exists(dbname):
        flash('Database does not exist', 'error')
        return render_template('error.html', title='Database error')

    try:
        conn = sqlite3.connect(dbname)
        data_results = []
        for q in queries:
            app.logger.debug("running: %s - %s" % (q['title'], q['sql']))
            if q['sql']:
                data = pd.read_sql_query(q['sql'], conn)
                data_results.append((data.to_html(), q['title'], q['explanation'], q['sql']))
        app.logger.debug("data: %s" % (",".join([d[0] for d in data_results])))
        app.logger.debug("titles: %s" % (",".join([d[1] for d in data_results])))
        app.logger.debug("expl: %s" % (",".join([d[2] for d in data_results])))
        return render_template('analyzeLog.html',
                               tables=[d[0] for d in data_results],
                               titles=[d[1] for d in data_results],
                               explanations=[d[2] for d in data_results],
                               sql=[d[3] for d in data_results],
                               LogFile='t1.log')
    except Exception as e:
        flash('Error executing SQL Query: %s, %s' % (str(e), traceback.format_exc()), 'error')
        return render_template('error.html', title='Database SQL error')