from flask import Flask, render_template, render_template_string
import configparser
import ssl
from routes.main_routes import main_bp
from routes.edit_routes import edit_bp
from utils.stats_utils import fetch_haproxy_stats, parse_haproxy_stats
from auth.auth_middleware import setup_auth
from log_parser import parse_log_file
import os
import sys
from utils.haproxy_config import update_haproxy_config, is_frontend_exist, count_frontends_and_backends

BASE_DIR = os.path.abspath(os.path.dirname(__file__))

app = Flask(
    __name__,
    static_folder=os.path.join(BASE_DIR, 'static'),
    static_url_path='/static',
    template_folder=os.path.join(BASE_DIR, 'templates')
)

CONFIG_DIR_DOCKER = '/etc/haproxy-configurator'
CONFIG_DIR_LOCAL = './config'
CONFIG_DIR_ENV = os.environ.get('CONFIG_DIR', None)

if CONFIG_DIR_ENV and os.path.exists(CONFIG_DIR_ENV):
    CONFIG_DIR = CONFIG_DIR_ENV
elif os.path.exists(CONFIG_DIR_DOCKER):
    CONFIG_DIR = CONFIG_DIR_DOCKER
elif os.path.exists(CONFIG_DIR_LOCAL):
    CONFIG_DIR = CONFIG_DIR_LOCAL
else:
    CONFIG_DIR = CONFIG_DIR_DOCKER

AUTH_CFG = os.path.join(CONFIG_DIR, 'auth', 'auth.cfg')
SSL_INI = os.path.join(CONFIG_DIR, 'ssl.ini')

os.makedirs(os.path.dirname(AUTH_CFG), exist_ok=True)
os.makedirs(os.path.dirname(SSL_INI), exist_ok=True)

BASIC_AUTH_USERNAME = "admin"
BASIC_AUTH_PASSWORD = "admin"

try:
    auth_config = configparser.ConfigParser()
    auth_config.read(AUTH_CFG)
    if auth_config.has_section('auth'):
        BASIC_AUTH_USERNAME = auth_config.get('auth', 'username', fallback='admin')
        BASIC_AUTH_PASSWORD = auth_config.get('auth', 'password', fallback='admin')
    else:
        BASIC_AUTH_USERNAME = "admin"
        BASIC_AUTH_PASSWORD = "admin"
except Exception as e:
    print(f"[APP] Auth config error: {e}, using defaults", flush=True)
    BASIC_AUTH_USERNAME = "admin"
    BASIC_AUTH_PASSWORD = "admin"

app.register_blueprint(main_bp)
app.register_blueprint(edit_bp)

setup_auth(app)

certificate_path = None
private_key_path = None
ssl_context = None

try:
    config2 = configparser.ConfigParser()
    config2.read(SSL_INI)

    if config2.has_section('ssl'):
        certificate_path = config2.get('ssl', 'certificate_path')
        private_key_path = config2.get('ssl', 'private_key_path')
    else:
        print(f"[APP] ✗ No [ssl] section in {SSL_INI}", flush=True)
        sys.exit(1)

    if not os.path.exists(certificate_path):
        print(f"[APP] ✗ Certificate not found: {certificate_path}", flush=True)
        sys.exit(1)

    if not os.path.exists(private_key_path):
        print(f"[APP] ✗ Private key not found: {private_key_path}", flush=True)
        sys.exit(1)

    ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
    ssl_context.load_cert_chain(certfile=certificate_path, keyfile=private_key_path)
    print(f"[APP] ✓ SSL context loaded", flush=True)

except Exception as e:
    print(f"[APP] ✗ SSL error: {e}", flush=True)
    sys.exit(1)


@app.route('/statistics')
def display_haproxy_stats():
    haproxy_stats = fetch_haproxy_stats()
    parsed_stats = parse_haproxy_stats(haproxy_stats)
    return render_template('statistics.html', stats=parsed_stats)

@app.route('/logs')
def display_logs():
    log_file_path = '/var/log/haproxy.log'
    parsed_entries = parse_log_file(log_file_path)
    return render_template('logs.html', entries=parsed_entries)


@app.route('/home')
def home():
    frontend_count, backend_count, acl_count, layer7_count, layer4_count = count_frontends_and_backends()
    return render_template('home.html', 
                         frontend_count=frontend_count, 
                         backend_count=backend_count, 
                         acl_count=acl_count,
                         layer7_count=layer7_count, 
                         layer4_count=layer4_count)


if __name__ == '__main__':
    app.run(host='::', port=5000, ssl_context=ssl_context, debug=True)