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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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
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#
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"""
Module contains the client to communicate with GRPC test Playground server
"""
import logging
import os
import uuid
from typing import List

import grpc
import sonora.aio

from api.v1 import api_pb2_grpc, api_pb2
from config import Config
from constants import BEAM_USE_WEBGRPC_ENV_VAR_KEY, GRPC_TIMEOUT_ENV_VAR_KEY
from models import SdkEnum


class GRPCClient:
    """GRPCClient is gRPC client for sending a request to the backend."""

    def __init__(self, wait_for_ready=True):
        use_webgrpc = os.getenv(BEAM_USE_WEBGRPC_ENV_VAR_KEY, False)
        timeout = int(os.getenv(GRPC_TIMEOUT_ENV_VAR_KEY, 30))
        logging.info("grpc timeout: %d", timeout)
        if use_webgrpc:
            self._channel = sonora.aio.insecure_web_channel(Config.SERVER_ADDRESS)
        else:
            self._channel = grpc.aio.insecure_channel(Config.SERVER_ADDRESS)

        self._stub = api_pb2_grpc.PlaygroundServiceStub(self._channel)

        self._kwargs = dict(timeout=timeout)
        if wait_for_ready and not use_webgrpc:
            self._kwargs["wait_for_ready"] = True

    async def __aenter__(self):
        return self

    async def __aexit__(self, exc_type, exc_val, exc_tb):
        await self._channel.__aexit__(exc_type, exc_val, exc_tb)

    async def run_code(self, 
        code: str,
        sdk: SdkEnum,
        pipeline_options: str,
        datasets: List[api_pb2.Dataset],
        files: List[api_pb2.SnippetFile],
        ) -> str:
        """
        Run example by his code and SDK

        Args:
            code: code of the example.
            sdk: SDK of the example.
            pipeline_options: pipeline options of the example.
            datasets: datasets of the example.

        Returns:
            pipeline_uuid: uuid of the pipeline
        """
        if sdk not in api_pb2.Sdk.values():
            sdks = api_pb2.Sdk.keys()
            sdks.remove(api_pb2.Sdk.Name(0))  # del SDK_UNSPECIFIED
            raise Exception(
                f'Incorrect sdk: must be from this pool: {", ".join(sdks)}')
        request = api_pb2.RunCodeRequest(
            code=code, sdk=sdk, pipeline_options=pipeline_options, datasets=datasets, files=files)
        response = await self._stub.RunCode(request, **self._kwargs)
        return response.pipeline_uuid

    async def check_status(self, pipeline_uuid: str) -> api_pb2.Status:
        """
        Get status of the pipeline by his pipeline

        Args:
            pipeline_uuid: uuid of the pipeline

        Returns:
            status: status of the pipeline
        """
        self._verify_pipeline_uuid(pipeline_uuid)
        request = api_pb2.CheckStatusRequest(pipeline_uuid=pipeline_uuid)
        response = await self._stub.CheckStatus(request, **self._kwargs)
        return response.status

    async def get_run_error(self, pipeline_uuid: str) -> str:
        """
        Get the error of pipeline execution.

        Args:
            pipeline_uuid: uuid of the pipeline

        Returns:
            output: contain an error of pipeline execution
        """
        self._verify_pipeline_uuid(pipeline_uuid)
        request = api_pb2.GetRunErrorRequest(pipeline_uuid=pipeline_uuid)
        response = await self._stub.GetRunError(request, **self._kwargs)
        return response.output

    async def get_run_output(self, pipeline_uuid: str, example_filepath: str) -> str:
        """
        Get the result of pipeline execution.

        Args:
            pipeline_uuid: uuid of the pipeline
            example_filepath: path to the file of the example

        Returns:
            output: contain the result of pipeline execution
        """
        self._verify_pipeline_uuid(pipeline_uuid)
        request = api_pb2.GetRunOutputRequest(pipeline_uuid=pipeline_uuid)
        response = await self._stub.GetRunOutput(request, **self._kwargs)
        if response.output == "":
            logging.info("Run output for %s is empty", example_filepath)
        return response.output

    async def get_log(self, pipeline_uuid: str, example_filepath: str) -> str:
        """
        Get the result of pipeline execution.

        Args:
            pipeline_uuid: uuid of the pipeline
            example_filepath: path to the file of the example

        Returns:
            output: contain the result of pipeline execution
        """
        self._verify_pipeline_uuid(pipeline_uuid)
        request = api_pb2.GetLogsRequest(pipeline_uuid=pipeline_uuid)
        response = await self._stub.GetLogs(request, **self._kwargs)
        if response.output == "":
            logging.info("Log for %s is empty", example_filepath)

        return response.output

    async def get_compile_output(self, pipeline_uuid: str) -> str:
        """
        Get the result of pipeline compilation.

        Args:
            pipeline_uuid: uuid of the pipeline

        Returns:
            output: contain the result of pipeline compilation
        """
        self._verify_pipeline_uuid(pipeline_uuid)
        request = api_pb2.GetCompileOutputRequest(pipeline_uuid=pipeline_uuid)
        response = await self._stub.GetCompileOutput(request, **self._kwargs)

        return response.output

    async def get_graph(self, pipeline_uuid: str, example_filepath: str) -> str:
        """
        Get the graph of pipeline execution.

        Args:
            pipeline_uuid: uuid of the pipeline
            example_filepath: path to the file of the example

        Returns:
            graph: contain the graph of pipeline execution as a string
        """
        self._verify_pipeline_uuid(pipeline_uuid)
        request = api_pb2.GetGraphRequest(pipeline_uuid=pipeline_uuid)
        try:
            response = await self._stub.GetGraph(request, **self._kwargs)
            if response.graph == "":
                logging.warning("Graph for %s wasn't generated", example_filepath)
            return response.graph
        except grpc.RpcError:
            logging.warning("Graph for %s wasn't generated", example_filepath)
            return ""

    def _verify_pipeline_uuid(self, pipeline_uuid):
        """
        Verify the received pipeline_uuid format

        Args:
            pipeline_uuid: uuid of the pipeline

        Returns:
            If pipeline ID is not verified, will raise an exception
        """
        try:
            uuid.UUID(pipeline_uuid)
        except ValueError as ve:
            raise ValueError(f"Incorrect pipeline uuid: '{pipeline_uuid}'") from ve