from botocore.exceptions import ClientError
from langchain_core.tools import StructuredTool

from .config import TABLE
from .dynamo import dynamodb


class ReportTools:
    def __init__(self, id_mapping: dict[str, str]):
        self.id_mapping = id_mapping

    def get_variable_value(self, id: str, variable: str) -> str:
        """
        Get a specific variable's value from DynamoDB for a specific id.

        Args:
            id: The id of the data
            variable: The variable/column name to retrieve from the table

        Returns:
            The content of the specified variable for the given id
        """
        real_id = self.id_mapping.get(id, id)
        try:
            table = dynamodb.Table(TABLE)
            response = table.get_item(Key={"id": real_id})

            if "Item" not in response:
                return f"No report found for month: {id}"

            item = response["Item"]
            content = item.get(variable, "")

            if not content:
                return f"Variable '{variable}' not found for month: {id}"

            return f"<{id}>\n{content}\n</{id}>"

        except ClientError as e:
            error_message = e.response["Error"]["Message"]
            return f"Error fetching report: {error_message}"

    def get_variables_list(self, id: str) -> str:
        """
        Get the list of variables available in the table for a specific month.

        Args:
            id: The id of the data

        Returns:
            The list of available variables/keys for the specified data
        """
        real_id = self.id_mapping.get(id, id)
        try:
            table = dynamodb.Table(TABLE)
            response = table.get_item(Key={"id": real_id})

            if "Item" not in response:
                return f"No data found for month: {id}"

            item = response["Item"]
            chaves_consolidadas = item.get("chaves_consolidadas", "")

            if not chaves_consolidadas:
                return f"No consolidated keys found for id: {id}"

            return chaves_consolidadas

        except ClientError as e:
            error_message = e.response["Error"]["Message"]
            return f"Error fetching consolidated keys: {error_message}"

    def as_tools(self) -> list:
        return [
            StructuredTool.from_function(
                self.get_variable_value,
                name="get_variable_value",
                description="Get a specific variable's data from DynamoDB for a specific id.",
            ),
            StructuredTool.from_function(
                self.get_variables_list,
                name="get_variable_list",
                description="Get the list of variables available in the table for a specific id.",
            ),
        ]