from flask import Flask, request, render_template, Response, jsonify, url_for
from flask_bootstrap import Bootstrap5
from forms import ScrapingForm
import requests
import pandas as pd
import time
from datetime import datetime, timedelta
import threading
import logging
from logging.handlers import QueueHandler
from queue import Queue
import os
import glob
from datetime import datetime
from flask import send_from_directory
import configparser

app = Flask(__name__)

# Load configuration
config = configparser.ConfigParser()
config.read('config.ini')

app.config['SECRET_KEY'] = config['DEFAULT']['SECRET_KEY']
API_KEY = config['DEFAULT']['API_KEY']

bootstrap = Bootstrap5(app)

# Initialize the logger
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)  # Adjust as needed

# Make any logger.info() call go to both the log file and the queue.
# 1) FILE HANDLER
logFile = "log/" + datetime.now().strftime('%Y-%m-%d-%H-%M') + '.log'
file_handler = logging.FileHandler(logFile, mode='w')
file_handler.setLevel(logging.DEBUG)  # or INFO, WARNING, etc.
formatter = logging.Formatter('%(asctime)s - %(levelname)s: %(message)s',
                              datefmt='%m/%d/%Y %I:%M:%S %p')
file_handler.setFormatter(formatter)

logger.addHandler(file_handler)

# 2) QUEUE HANDLER
log_queue = Queue()
queue_handler = QueueHandler(log_queue)
queue_handler.setLevel(logging.DEBUG)
logger.addHandler(queue_handler)

# Global state
scraping_active = False
scraping_thread = None

def fetch_faction_data(faction_id):
    url = f"https://api.torn.com/faction/{faction_id}?selections=&key={API_KEY}"
    response = requests.get(url)
    if response.status_code == 200:
        logger.info(f"Fetched data for faction ID {faction_id}")
        return response.json()
    else:
        logger.warning(f"Failed to fetch faction data for faction ID {faction_id}")
        return None

def fetch_user_activity(user_id):
    url = f"https://api.torn.com/user/{user_id}?selections=basic,profile&key={API_KEY}"
    response = requests.get(url)
    if response.status_code == 200:
        return response.json()
    else:
        logger.error(f"Failed to fetch user activity for user ID {user_id}")
        return None

def scrape_data(faction_id, fetch_interval, run_interval):
    global scraping_active
    end_time = datetime.now() + timedelta(days=run_interval)
    filename = f"data/{faction_id}-{datetime.now().strftime('%Y-%m-%d-%H-%M')}.csv"

    while datetime.now() < end_time and scraping_active:
        logger.info(f"Fetching data at {datetime.now()}")
        faction_data = fetch_faction_data(faction_id)
        if faction_data and 'members' in faction_data:
            user_activity_data = []
            for user_id, user_info in faction_data['members'].items():
                user_activity = fetch_user_activity(user_id)
                if user_activity:
                    user_activity_data.append({
                        'user_id': user_id,
                        'name': user_activity.get('name', ''),
                        'last_action': user_activity.get('last_action', {}).get('timestamp', 0),
                        'status': user_activity.get('status', {}).get('state', ''),
                        'timestamp': datetime.now().timestamp()
                    })
                    logger.info(f"Fetched data for user {user_id} ({user_activity.get('name', '')})")

            # Append data to the file
            df = pd.DataFrame(user_activity_data)
            df['last_action'] = pd.to_datetime(df['last_action'], unit='s')
            df['timestamp'] = pd.to_datetime(df['timestamp'], unit='s')

            if not os.path.isfile(filename):
                df.to_csv(filename, index=False)
            else:
                df.to_csv(filename, mode='a', header=False, index=False)

            logger.info(f"Data appended to {filename}")

        time.sleep(fetch_interval)
    else:
        if datetime.now() < end_time:
            logger.warning(f"Scraping stopped at {datetime.now()}")
        elif scraping_active == False:
            logger.warning(f"Scraping stopped at {datetime.now()} due to user request")
        else:
            logger.error(f"Scraping stopped due to timeout at {datetime.now()}")
    logger.info("Scraping completed.")
    scraping_active = False

def generate_statistics(df):
    df['hour'] = df['timestamp'].dt.hour
    activity_by_hour = df.groupby('hour').size()
    return activity_by_hour

# Taken from:
# https://gist.github.com/amitsaha/5990310?permalink_comment_id=3017951#gistcomment-3017951
def tail(filename, n):
    stat = os.stat(filename)
    n = int(n)
    if stat.st_size == 0 or n == 0:
        yield ''
        return

    page_size = config['LOGGING']['TAIL_PAGE_SIZE']
    offsets = []
    count = _n = n if n >= 0 else -n

    last_byte_read = last_nl_byte = starting_offset = stat.st_size - 1

    with open(filename, 'r') as f:
        while count > 0:
            starting_byte = last_byte_read - page_size
            if last_byte_read == 0:
                offsets.append(0)
                break
            elif starting_byte < 0:
                f.seek(0)
                text = f.read(last_byte_read)
            else:
                f.seek(starting_byte)
                text = f.read(page_size)

            for i in range(-1, -1*len(text)-1, -1):
                last_byte_read -= 1
                if text[i] == '\n':
                    last_nl_byte = last_byte_read
                    starting_offset = last_nl_byte + 1
                    offsets.append(starting_offset)
            count -= 1

    offsets = offsets[len(offsets)-_n:]
    offsets.reverse()

    with open(filename, 'r') as f:
        for i, offset in enumerate(offsets):
            f.seek(offset)

            if i == len(offsets) - 1:
                yield f.read()
            else:
                bytes_to_read = offsets[i+1] - offset
                yield f.read(bytes_to_read)

@app.route('/')
def index():
    form = ScrapingForm()
    return render_template('index.html', form=form)

@app.route('/start_scraping', methods=['POST'])
def start_scraping():
    global scraping_active, scraping_thread
    form = ScrapingForm()
    if form.validate_on_submit():
        if scraping_active:
            logger.warning("Can't start scraping process: scraping already in progress")
            return jsonify({"status": "Scraping already in progress"})
        
        scraping_active = True
        
        faction_id = form.faction_id.data
        fetch_interval = form.fetch_interval.data
        run_interval = form.run_interval.data

        # Start scraping in a separate thread
        scraping_thread = threading.Thread(target=scrape_data, args=(faction_id, fetch_interval, run_interval))
        scraping_thread.daemon = True
        scraping_thread.start()

        return jsonify({"status": "Scraping started"})
    return jsonify({"status": "Invalid form data"})

@app.route('/stop_scraping', methods=['POST'])
def stop_scraping():
    global scraping_active
    if not scraping_active:
        return jsonify({"status": "No scraping in progress"})
    
    scraping_active = False
    logger.debug("scraping_active set to False")
    return jsonify({"status": "Scraping stopped"})

@app.route('/scraping_status', methods=['GET'])
def scraping_status():
    global scraping_active
    logger.debug(f"scraping_status called: scraping_active = {scraping_active}")
    return jsonify({"scraping_active": scraping_active})

@app.route('/logs')
def logs():
    def generate():
        while True:
            if not log_queue.empty():
                log = log_queue.get().getMessage()
                yield f"data: {log}\n\n"
            time.sleep(0.1)
    return Response(generate(), mimetype='text/event-stream')

@app.route('/logfile', methods=['GET'])
def logfile():
    page = int(request.args.get('page', 0))  # Page number
    lines_per_page = int(request.args.get('lines_per_page', config['LOGGING']['VIEW_PAGE_LINES']))  # Lines per page
    log_file_path = logFile  # Path to the current log file

    if not os.path.isfile(log_file_path):
        logging.error("Log file not found")
        return jsonify({"error": "Log file not found"}), 404

    log_lines = list(tail(log_file_path, config['LOGGING']['VIEW_MAX_LINES']))
    
    log_lines = log_lines[::-1]  # Reverse the list
    
    start = page * lines_per_page
    end = start + lines_per_page
    paginated_lines = log_lines[start:end] if start < len(log_lines) else []

    return jsonify({
        "log": paginated_lines,
        "total_lines": len(log_lines),
        "pages": (len(log_lines) + lines_per_page - 1) // lines_per_page,
        "start_line": len(log_lines) - start  # Starting line number for the current page
    })
@app.route('/results')
def results():
    # Assuming the scraping is done and data is saved somewhere
    faction_id = request.args.get('faction_id')
    filename = f"data/{faction_id}-{datetime.now().strftime('%Y-%m-%d-%H-%M')}.csv"
    if os.path.isfile(filename):
        df = pd.read_csv(filename)
        stats = generate_statistics(df)
        return render_template('results.html', stats=stats.to_dict())
    else:
        return "No data found."

@app.route('/download_results')
def download_results():
    data_files = glob.glob("data/*.csv")
    log_files = glob.glob("log/*.log")

    def get_file_info(file_path):
        return {
            "name": file_path,
            "name_display": os.path.basename(file_path),
            "last_modified": os.path.getmtime(file_path),
            "created": os.path.getctime(file_path),
            "size": get_size(file_path)
        }
       
    data_files_info = [get_file_info(file) for file in data_files]
    log_files_info = [get_file_info(file) for file in log_files]
    
    files = {"data": data_files_info, "log": log_files_info}
    
    return render_template('download_results.html', files=files)

@app.route('/delete_files', methods=['POST'])
def delete_files():
    file_paths = request.form.getlist('file_paths')
    
    if not file_paths:
        return jsonify({"error": "No files specified"}), 400
    
    errors = []
    for file_path in file_paths:
        if not os.path.isfile(file_path):
            errors.append({"file": file_path, "error": "File not found"})
            continue
        
        try:
            os.remove(file_path)
        except Exception as e:
            errors.append({"file": file_path, "error": str(e)})
    
    if errors:
        return jsonify({"errors": errors}), 207  # Multi-Status response
    return jsonify({"success": True}), 200

@app.template_filter('datetimeformat')
def datetimeformat(value):
    return datetime.fromtimestamp(value).strftime('%Y-%m-%d %H:%M:%S')

def get_size(path):
        size = os.path.getsize(path)
        if size < 1024:
            return f"{size} bytes"
        elif size < pow(1024,2):
            return f"{round(size/1024, 2)} KB"
        elif size < pow(1024,3):
            return f"{round(size/(pow(1024,2)), 2)} MB"
        elif size < pow(1024,4):
            return f"{round(size/(pow(1024,3)), 2)} GB"

@app.route('/data/<path:filename>')
def download_data_file(filename):
    return send_from_directory('data', filename)

@app.route('/logs/<path:filename>')
def download_log_file(filename):
    return send_from_directory('logs', filename)

@app.route('/config/lines_per_page')
def get_lines_per_page():
    lines_per_page = config['LOGGING']['VIEW_PAGE_LINES']
    return jsonify({"lines_per_page": lines_per_page})

if __name__ == '__main__':
    app.run(debug=True, threaded=True)