# ========= Copyright 2023-2026 @ CAMEL-AI.org. All Rights Reserved. =========
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ========= Copyright 2023-2026 @ CAMEL-AI.org. All Rights Reserved. =========

import json
import logging
import os
from typing import List, Optional

from camel.toolkits import FunctionTool
from camel.toolkits.base import BaseToolkit
from camel.utils import MCPServer, api_keys_required


@MCPServer()
class StripeToolkit(BaseToolkit):
    r"""A class representing a toolkit for Stripe operations.

    This toolkit provides methods to interact with the Stripe API,
    allowing users to operate stripe core resources, including Customer,
    Balance, BalanceTransaction, Payment, Refund

    Use the Developers Dashboard https://dashboard.stripe.com/test/apikeys to
    create an API keys as STRIPE_API_KEY.

    Attributes:
        logger (Logger): a logger to write logs.
    """

    @api_keys_required(
        [
            (None, "STRIPE_API_KEY"),
        ]
    )
    def __init__(
        self,
        retries: int = 3,
        timeout: Optional[float] = None,
    ):
        super().__init__(timeout=timeout)
        r"""Initializes the StripeToolkit with the specified number of
        retries.

        Args:
            retries (int,optional): Number of times to retry the request in
                case of failure. (default: :obj:`3`)
        """
        super().__init__(timeout=timeout)
        import stripe

        stripe.max_network_retries = retries
        stripe.log = 'info'
        self.logger = logging.getLogger(__name__)
        self.logger.setLevel(logging.INFO)
        handler = logging.StreamHandler()
        formatter = logging.Formatter(
            '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
        )
        handler.setFormatter(formatter)
        if not self.logger.handlers:
            self.logger.addHandler(handler)
        stripe.api_key = os.environ.get("STRIPE_API_KEY")

    def customer_get(self, customer_id: str) -> str:
        r"""Retrieve a customer by ID.

        Args:
            customer_id (str): The ID of the customer to retrieve.

        Returns:
            str: The customer data as a str.
        """
        import stripe

        try:
            self.logger.info(f"Retrieving customer with ID: {customer_id}")
            customer = stripe.Customer.retrieve(customer_id)
            self.logger.info(f"Retrieved customer: {customer.id}")
            json_string = json.dumps(customer, ensure_ascii=False)
            return json_string
        except Exception as e:
            return self.handle_exception("customer_get", e)

    def customer_list(self, limit: int = 100) -> str:
        r"""List customers.

        Args:
            limit (int, optional): Number of customers to retrieve. (default:
                :obj:`100`)

        Returns:
            str: An output str if successful, or an error message string if
                failed.
        """
        import stripe

        try:
            self.logger.info(f"Listing customers with limit={limit}")
            customers = stripe.Customer.list(limit=limit).data
            self.logger.info(
                f"Successfully retrieved {len(customers)} customers."
            )
            return json.dumps(
                [customer for customer in customers], ensure_ascii=False
            )
        except Exception as e:
            return self.handle_exception("customer_list", e)

    def balance_get(self) -> str:
        r"""Retrieve your account balance.

        Returns:
            str: A str containing the account balance if successful, or an
                error message string if failed.
        """
        import stripe

        try:
            self.logger.info("Retrieving account balance.")
            balance = stripe.Balance.retrieve()
            self.logger.info(
                f"Successfully retrieved account balance: {balance}."
            )
            return json.dumps(balance, ensure_ascii=False)
        except Exception as e:
            return self.handle_exception("balance_get", e)

    def balance_transaction_list(self, limit: int = 100) -> str:
        r"""List your balance transactions.

        Args:
            limit (int, optional): Number of balance transactions to retrieve.
                (default::obj:`100`)

        Returns:
            str: A list of balance transaction data if successful, or an error
                message string if failed.
        """
        import stripe

        try:
            self.logger.info(
                f"Listing balance transactions with limit={limit}"
            )
            transactions = stripe.BalanceTransaction.list(limit=limit).data
            self.logger.info(
                f"Successfully retrieved {len(transactions)} "
                "balance transactions."
            )
            return json.dumps(
                [transaction for transaction in transactions],
                ensure_ascii=False,
            )
        except Exception as e:
            return self.handle_exception("balance_transaction_list", e)

    def payment_get(self, payment_id: str) -> str:
        r"""Retrieve a payment by ID.

        Args:
            payment_id (str): The ID of the payment to retrieve.

        Returns:
            str:The payment data as a str if successful, or an error message
                string if failed.
        """
        import stripe

        try:
            self.logger.info(f"Retrieving payment with ID: {payment_id}")
            payment = stripe.PaymentIntent.retrieve(payment_id)
            self.logger.info(f"Retrieved payment: {payment.id}")
            return json.dumps(payment, ensure_ascii=False)
        except Exception as e:
            return self.handle_exception("payment_get", e)

    def payment_list(self, limit: int = 100) -> str:
        r"""List payments.

        Args:
            limit (int, optional): Number of payments to retrieve.
                (default::obj:`100`)

        Returns:
            str: A list of payment data if successful, or an error message
                string if failed.
        """
        import stripe

        try:
            self.logger.info(f"Listing payments with limit={limit}")
            payments = stripe.PaymentIntent.list(limit=limit).data
            self.logger.info(
                f"Successfully retrieved {len(payments)} payments."
            )
            return json.dumps(
                [payment for payment in payments], ensure_ascii=False
            )
        except Exception as e:
            return self.handle_exception("payment_list", e)

    def refund_get(self, refund_id: str) -> str:
        r"""Retrieve a refund by ID.

        Args:
            refund_id (str): The ID of the refund to retrieve.

        Returns:
            str: The refund data as a str if successful, or an error message
                string if failed.
        """
        import stripe

        try:
            self.logger.info(f"Retrieving refund with ID: {refund_id}")
            refund = stripe.Refund.retrieve(refund_id)
            self.logger.info(f"Retrieved refund: {refund.id}")
            return json.dumps(refund, ensure_ascii=False)
        except Exception as e:
            return self.handle_exception("refund_get", e)

    def refund_list(self, limit: int = 100) -> str:
        r"""List refunds.

        Args:
            limit (int, optional): Number of refunds to retrieve.
                (default::obj:`100`)

        Returns:
            str: A list of refund data as a str if successful, or an error
                message string if failed.
        """
        import stripe

        try:
            self.logger.info(f"Listing refunds with limit={limit}")
            refunds = stripe.Refund.list(limit=limit).data
            self.logger.info(f"Successfully retrieved {len(refunds)} refunds.")
            return json.dumps(
                [refund for refund in refunds], ensure_ascii=False
            )
        except Exception as e:
            return self.handle_exception("refund_list", e)

    def handle_exception(self, func_name: str, error: Exception) -> str:
        r"""Handle exceptions by logging and returning an error message.

        Args:
            func_name (str): The name of the function where the exception
                occurred.
            error (Exception): The exception instance.

        Returns:
            str: An error message string.
        """
        from stripe import StripeError

        if isinstance(error, StripeError):
            message = error.user_message or str(error)
            self.logger.error(f"Stripe error in {func_name}: {message}")
            return f"Stripe error in {func_name}: {message}"
        else:
            self.logger.error(f"Unexpected error in {func_name}: {error!s}")
            return f"Unexpected error in {func_name}: {error!s}"

    def get_tools(self) -> List[FunctionTool]:
        r"""Returns a list of FunctionTool objects representing the
        functions in the toolkit.

        Returns:
            List[FunctionTool]: A list of FunctionTool objects for the
                toolkit methods.
        """
        return [
            FunctionTool(self.customer_get),
            FunctionTool(self.customer_list),
            FunctionTool(self.balance_get),
            FunctionTool(self.balance_transaction_list),
            FunctionTool(self.payment_get),
            FunctionTool(self.payment_list),
            FunctionTool(self.refund_get),
            FunctionTool(self.refund_list),
        ]
