#!/usr/bin/env python3

import sys
import os

import re
from datetime import datetime
import json
import mysql.connector as mysql

import logging

from utils.time import timestamp_fmt as ts
from utils.config import loader as setting

def conn_db(cfg):
    return  mysql.connect(user=cfg.dbuser, password=cfg.dbpass, host=cfg.dbhost, port=cfg.dbport )

def extract_value(patterns, source, default='Not Defined'):
    ip = {}
    for pattern in patterns:
        s_pattern = rf'{pattern}:\s*(\d{{1,3}}(?:\.\d{{1,3}}){{3}})'
        matches = re.search(s_pattern, source, re.IGNORECASE)
        if matches:
            ip.update({pattern: matches.group(1)})
        else:
            ip.update({pattern: default})
    return ip

def write_db(records, cfg):
    insert_values = [
        (
            record["unit_name"], record["unit_type"], record["tool_name"], record["tool_type"],
            record["unit_ip"], record["unit_subnet"], record["unit_gateway"], record["event_timestamp"],
            record["battery_level"], record["temperature"], record["nodes_jsonb"]
        )
        for record in records
    ]

    query = f"""
        INSERT IGNORE INTO {cfg.dbname}.{cfg.dbdataraw} (
            unit_name, unit_type, tool_name, tool_type, unit_ip, unit_subnet, unit_gateway,
            event_timestamp, battery_level, temperature, nodes_jsonb
        )
        VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
        """

    try:
        with conn_db(cfg) as conn:
            conn.autocommit = True
            with conn.cursor() as cur:
                try:
                    cur.executemany(query, insert_values)
                    cur.close()
                    conn.commit()
                except Exception as e:
                    logging.error(f'Records not inserted: {e}')
                    logging.info('Exit')
                    exit()
    except Exception as e:
        logging.error(f'Records not inserted: {e}')
        exit()

def elab_csv(cfg):
    try:
        with conn_db(cfg) as conn:
            cur = conn.cursor()
            cur.execute(f'select id, unit_name, unit_type, tool_name, tool_type, tool_data from {cfg.dbname}.{cfg.dbrectable} where locked = 0 and status = 0 limit 1')
            id, unit_name, unit_type, tool_name, tool_type, tool_data = cur.fetchone()
            cur.execute(f'update {cfg.dbname}.{cfg.dbrectable} set locked = 1 where id = {id}')
            data_list = str(tool_data).strip("('{\"").strip("\"}\',)").split('","')
            # Estrarre le informazioni degli ip dalla header
            infos = extract_value(cfg.csv_infos, str(data_list[:9]))
    except Exception as e:
        logging.error(f'{e}')

    records = []
    # Definizione dei pattern
    timestamp_pattern1 = r'(\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2});'
    timestamp_pattern2 = r'(\d{2}/\d{2}/\d{4} \d{2}:\d{2}:\d{2});'

    # Formato desiderato per il timestamp
    output_format = "%Y-%m-%d %H:%M:%S"

    for line in list(set(data_list)):
        if (match := re.search(timestamp_pattern1, line)):
            timestamp = datetime.strptime(match.group(1), "%Y/%m/%d %H:%M:%S").strftime(output_format)
        elif (match := re.search(timestamp_pattern2, line)):
            timestamp = datetime.strptime(match.group(1), "%d/%m/%Y %H:%M:%S").strftime(output_format)
        else:
            continue

        line_without_timestamp = (line[match.end():]).strip('|;')

        match_values = re.findall(r'[-+]?\d*\.\d+|\d+', line_without_timestamp)
        battery_level, temperature = match_values[0], match_values[1]
        remainder = ";".join(line_without_timestamp.split(";")[2:]).strip('|;')

        # Rimuovi spazi bianchi o caratteri di nuova riga
        nodes = remainder.strip().replace('\\n', '').split(";|;")

        # Estrai i valori di ciascun nodo e formatta i dati come JSON
        node_list = []
        for i, node_data in enumerate(nodes, start=1):
            node_dict = {"num": i}
            # Dividi ogni nodo in valori separati da ";"
            node_values = node_data.split(';')
            for j, value in enumerate(node_values, start=0):
                # Imposta i valori a -9999 se trovi "Dis."
                node_dict['val' + str(j)] = -9999 if (value == "Dis." or value == "Err1" or value == "Err2" or value == "---" or value == "NotAv" or value == "No RX" or value == "DMUXe" or value == "CH n. Error" or value == "-") else float(value)
            node_list.append(node_dict)

        # Prepara i dati per l'inserimento/aggiornamento
        record = {
            "unit_name": unit_name.upper(),
            "unit_type": unit_type.upper(),
            "tool_name": tool_name.upper(),
            "tool_type": tool_type.upper(),
            "unit_ip": infos['IP'],
            "unit_subnet": infos['Subnet'],
            "unit_gateway": infos['Gateway'],
            "event_timestamp": timestamp,
            "battery_level": float(battery_level),
            "temperature": float(temperature),
            "nodes_jsonb": json.dumps(node_list)  # Converti la lista di dizionari in una stringa JSON
        }

        records.append(record)

        # Se abbiamo raggiunto 500 record, esegui l'inserimento in batch
        if len(records) >= 500:
            logging.info("Raggiunti 500 record scrivo sul DB")
            write_db(records, cfg)
            records = []
    write_db(records, cfg)


def main():
    # Load the configuration settings
    cfg = setting.config()

    try:
        # Configura la connessione al database PostgreSQL
        # Configure logging
        logging.basicConfig(
            format="%(asctime)s %(message)s",
            filename=cfg.elablog,
            level=logging.INFO,
        )
        elab_csv(cfg)

    except KeyboardInterrupt:
        logging.info(
            "Info: {}.".format("Shutdown requested...exiting")
        )

    except Exception:
        print(
            "{} - PID {:>5} >> Error: {}.".format(
                ts.timestamp("log"), os.getpid(), sys.exc_info()[1]
            )
        )

if __name__ == "__main__":
    main()