CBA2ndNGO

import datetime
import random
import hashlib

# Simulated database for the platform
database = {
    "users": [],
    "donations": [],
    "notifications": [],
    "rewards": {},
    "leaderboard": {},
}

# Blockchain implementation for transparency
class Blockchain:
    def __init__(self):
        self.chain = []
        self.create_block(previous_hash='0')

    def create_block(self, data=None, previous_hash='0'):
        block = {
            'index': len(self.chain) + 1,
            'timestamp': str(datetime.datetime.now()),
            'data': data or {},
            'previous_hash': previous_hash,
            'hash': self.hash_block(data, previous_hash)
        }
        self.chain.append(block)
        return block

    def hash_block(self, data, previous_hash):
        content = f"{data}{previous_hash}{datetime.datetime.now()}"
        return hashlib.sha256(content.encode()).hexdigest()

blockchain = Blockchain()

# Helper functions
def get_user_role():
    print("\nSelect Your Role:")
    print("1. Donor")
    print("2. NGO")
    print("3. Volunteer")
    print("4. Admin")
    return int(input("Enter your choice: "))

def create_account():
    name = input("Enter your name: ")
    email = input("Enter your email: ")
    password = input("Set your password: ")
    role = get_user_role()
    user = {"name": name, "email": email, "password": password, "role": role}
    database["users"].append(user)
    print("Account created successfully!")

def login():
    email = input("Enter your email: ")
    password = input("Enter your password: ")
    for user in database["users"]:
        if user["email"] == email and user["password"] == password:
            print(f"Welcome back, {user['name']}!")
            return user
    print("Invalid credentials. Please try again.")
    return None

def add_donation(user):
    print("\nAdd Donation")
    food_item = input("Enter the food item: ")
    quantity = input("Enter the quantity: ")
    expiry_date = input("Enter the expiry date (YYYY-MM-DD): ")
    donation = {
        "donor": user["name"],
        "food_item": food_item,
        "quantity": quantity,
        "expiry_date": expiry_date,
        "timestamp": str(datetime.datetime.now()),
    }
    database["donations"].append(donation)
    blockchain.create_block(data=donation)
    print("Donation added successfully!")

def view_donations():
    print("\nCurrent Donations")
    for idx, donation in enumerate(database["donations"], start=1):
        print(f"{idx}. {donation['food_item']} - {donation['quantity']} (Expires: {donation['expiry_date']})")

def view_notifications(user):
    print("\nYour Notifications")
    for notification in database["notifications"]:
        if notification["recipient"] == user["name"] or notification["recipient"] == "All":
            print(f"- {notification['message']}")

def add_reward(user):
    database["rewards"].setdefault(user["name"], 0)
    database["rewards"][user["name"]] += random.randint(10, 50)
    print(f"Reward points added! Current points: {database['rewards'][user['name']]}")

def view_leaderboard():
    print("\nLeaderboard")
    sorted_leaderboard = sorted(database["rewards"].items(), key=lambda x: x[1], reverse=True)
    for idx, (user, points) in enumerate(sorted_leaderboard, start=1):
        print(f"{idx}. {user} - {points} points")

def crisis_mode():
    print("\nCrisis Mode Activated!")
    database["notifications"].append({"recipient": "All", "message": "Crisis Mode is now active! Prioritize urgent donations."})

def dashboard(user):
    while True:
        print("\nDashboard")
        print("1. Add Donation")
        print("2. View Donations")
        print("3. View Notifications")
        print("4. View Rewards")
        print("5. View Leaderboard")
        if user["role"] == 4:  # Admin
            print("6. Activate Crisis Mode")
        print("0. Logout")
        choice = int(input("Enter your choice: "))

        if choice == 1:
            add_donation(user)
        elif choice == 2:
            view_donations()
        elif choice == 3:
            view_notifications(user)
        elif choice == 4:
            print(f"Your current reward points: {database['rewards'].get(user['name'], 0)}")
        elif choice == 5:
            view_leaderboard()
        elif choice == 6 and user["role"] == 4:
            crisis_mode()
        elif choice == 0:
            print("Logging out...")
            break
        else:
            print("Invalid choice. Please try again.")

def main():
    while True:
        print("\nWelcome to the Food Redistribution Platform")
        print("1. Login")
        print("2. Create Account")
        print("0. Exit")
        choice = int(input("Enter your choice: "))

        if choice == 1:
            user = login()
            if user:
                dashboard(user)
        elif choice == 2:
            create_account()
        elif choice == 0:
            print("Thank you for using the platform. Goodbye!")
            break
        else:
            print("Invalid choice. Please try again.")

if __name__ == "__main__":
    main()