import os
import sqlite3
import threading

thread_local = threading.local()

def get_db_connection():
    if not hasattr(thread_local, 'connection'):
        thread_local.connection = sqlite3.connect('bulletins.db')
    return thread_local.connection

def initialize_database():
    conn = get_db_connection()
    c = conn.cursor()
    c.execute('''CREATE TABLE IF NOT EXISTS bulletins (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    board TEXT NOT NULL,
                    sender_short_name TEXT NOT NULL,
                    date TEXT NOT NULL,
                    subject TEXT NOT NULL,
                    content TEXT NOT NULL,
                    unique_id TEXT NOT NULL
                )''')
    c.execute('''CREATE TABLE IF NOT EXISTS mail (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    sender TEXT NOT NULL,
                    sender_short_name TEXT NOT NULL,
                    recipient TEXT NOT NULL,
                    date TEXT NOT NULL,
                    subject TEXT NOT NULL,
                    content TEXT NOT NULL,
                    unique_id TEXT NOT NULL
                );''')
    c.execute('''CREATE TABLE IF NOT EXISTS channels (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    name TEXT NOT NULL,
                    url TEXT NOT NULL
                );''')
    conn.commit()

def list_bulletins():
    conn = get_db_connection()
    c = conn.cursor()
    c.execute("SELECT id, board, sender_short_name, date, subject, unique_id FROM bulletins")
    bulletins = c.fetchall()
    if bulletins:
        print_bold("Bulletins:")
        for bulletin in bulletins:
            print_bold(f"(ID: {bulletin[0]}, Board: {bulletin[1]}, Poster: {bulletin[2]}, Subject: {bulletin[4]})")
    else:
        print_bold("No bulletins found.")
    print_separator()
    return bulletins

def list_mail():
    conn = get_db_connection()
    c = conn.cursor()
    c.execute("SELECT id, sender, sender_short_name, recipient, date, subject, unique_id FROM mail")
    mail = c.fetchall()
    if mail:
        print_bold("Mail:")
        for mail in mail:
            print_bold(f"(ID: {mail[0]}, Sender: {mail[2]}, Recipient: {mail[3]}, Subject: {mail[5]})")
    else:
        print_bold("No mail found.")
    print_separator()
    return mail

def list_channels():
    conn = get_db_connection()
    c = conn.cursor()
    c.execute("SELECT id, name, url FROM channels")
    channels = c.fetchall()
    if channels:
        print_bold("Channels:")
        for channel in channels:
            print_bold(f"(ID: {channel[0]}, Name: {channel[1]}, URL: {channel[2]})")
    else:
        print_bold("No channels found.")
    print_separator()
    return channels

def delete_bulletin():
    bulletins = list_bulletins()
    if bulletins:
        bulletin_ids = input_bold("Enter the bulletin ID(s) to delete (comma-separated) or 'X' to cancel: ").split(',')
        if 'X' in [id.strip().upper() for id in bulletin_ids]:
            print_bold("Deletion cancelled.")
            print_separator()
            return
        conn = get_db_connection()
        c = conn.cursor()
        for bulletin_id in bulletin_ids:
            c.execute("DELETE FROM bulletins WHERE id = ?", (bulletin_id.strip(),))
        conn.commit()
        print_bold(f"Bulletin(s) with ID(s) {', '.join(bulletin_ids)} deleted.")
        print_separator()

def delete_mail():
    mail = list_mail()
    if mail:
        mail_ids = input_bold("Enter the mail ID(s) to delete (comma-separated) or 'X' to cancel: ").split(',')
        if 'X' in [id.strip().upper() for id in mail_ids]:
            print_bold("Deletion cancelled.")
            print_separator()
            return
        conn = get_db_connection()
        c = conn.cursor()
        for mail_id in mail_ids:
            c.execute("DELETE FROM mail WHERE id = ?", (mail_id.strip(),))
        conn.commit()
        print_bold(f"Mail with ID(s) {', '.join(mail_ids)} deleted.")
        print_separator()

def delete_channel():
    channels = list_channels()
    if channels:
        channel_ids = input_bold("Enter the channel ID(s) to delete (comma-separated) or 'X' to cancel: ").split(',')
        if 'X' in [id.strip().upper() for id in channel_ids]:
            print_bold("Deletion cancelled.")
            print_separator()
            return
        conn = get_db_connection()
        c = conn.cursor()
        for channel_id in channel_ids:
            c.execute("DELETE FROM channels WHERE id = ?", (channel_id.strip(),))
        conn.commit()
        print_bold(f"Channel(s) with ID(s) {', '.join(channel_ids)} deleted.")
        print_separator()

def display_menu():
    print("Menu:")
    print("1. List Bulletins")
    print("2. List Mail")
    print("3. List Channels")
    print("4. Delete Bulletins")
    print("5. Delete Mail")
    print("6. Delete Channels")
    print("7. Exit")

def display_banner():
    banner = """
████████╗ ██████╗██████╗       ██████╗ ██████╗ ███████╗
╚══██╔══╝██╔════╝╚════██╗      ██╔══██╗██╔══██╗██╔════╝
   ██║   ██║      █████╔╝█████╗██████╔╝██████╔╝███████╗
   ██║   ██║     ██╔═══╝ ╚════╝██╔══██╗██╔══██╗╚════██║
   ██║   ╚██████╗███████╗      ██████╔╝██████╔╝███████║
   ╚═╝    ╚═════╝╚══════╝      ╚═════╝ ╚═════╝ ╚══════╝
Database Administrator
"""
    print_bold(banner)
    print_separator()

def clear_screen():
    os.system('cls' if os.name == 'nt' else 'clear')

def input_bold(prompt):
    print("\033[1m")  # ANSI escape code for bold text
    response = input(prompt)
    print("\033[0m")  # ANSI escape code to reset text
    return response

def print_bold(message):
    print("\033[1m" + message + "\033[0m")  # Bold text

def print_separator():
    print_bold("========================")

def main():
    display_banner()
    initialize_database()
    while True:
        display_menu()
        choice = input_bold("Enter your choice: ")
        clear_screen()
        if choice == '1':
            list_bulletins()
        elif choice == '2':
            list_mail()
        elif choice == '3':
            list_channels()
        elif choice == '4':
            delete_bulletin()
        elif choice == '5':
            delete_mail()
        elif choice == '6':
            delete_channel()
        elif choice == '7':
            break
        else:
            print_bold("Invalid choice. Please try again.")
            print_separator()

if __name__ == "__main__":
    main()