#!/usr/bin/env python
# coding=utf-8

# Copyright 2024 The HuggingFace Inc. team. 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.
from ..utils import logging
from .agent_types import AgentAudio, AgentImage, AgentText


logger = logging.get_logger(__name__)


def pull_message(step_log: dict, test_mode: bool = True):
    try:
        from gradio import ChatMessage
    except ImportError:
        if test_mode:

            class ChatMessage:
                def __init__(self, role, content, metadata=None):
                    self.role = role
                    self.content = content
                    self.metadata = metadata
        else:
            raise ImportError("Gradio should be installed in order to launch a gradio demo.")

    if step_log.get("rationale"):
        yield ChatMessage(role="assistant", content=step_log["rationale"])
    if step_log.get("tool_call"):
        used_code = step_log["tool_call"]["tool_name"] == "code interpreter"
        content = step_log["tool_call"]["tool_arguments"]
        if used_code:
            content = f"```py\n{content}\n```"
        yield ChatMessage(
            role="assistant",
            metadata={"title": f"🛠️ Used tool {step_log['tool_call']['tool_name']}"},
            content=str(content),
        )
    if step_log.get("observation"):
        yield ChatMessage(role="assistant", content=f"```\n{step_log['observation']}\n```")
    if step_log.get("error"):
        yield ChatMessage(
            role="assistant",
            content=str(step_log["error"]),
            metadata={"title": "💥 Error"},
        )


def stream_to_gradio(agent, task: str, test_mode: bool = False, **kwargs):
    """Runs an agent with the given task and streams the messages from the agent as gradio ChatMessages."""

    try:
        from gradio import ChatMessage
    except ImportError:
        if test_mode:

            class ChatMessage:
                def __init__(self, role, content, metadata=None):
                    self.role = role
                    self.content = content
                    self.metadata = metadata
        else:
            raise ImportError("Gradio should be installed in order to launch a gradio demo.")

    for step_log in agent.run(task, stream=True, **kwargs):
        if isinstance(step_log, dict):
            for message in pull_message(step_log, test_mode=test_mode):
                yield message

    final_answer = step_log  # Last log is the run's final_answer

    if isinstance(final_answer, AgentText):
        yield ChatMessage(role="assistant", content=f"**Final answer:**\n```\n{final_answer.to_string()}\n```")
    elif isinstance(final_answer, AgentImage):
        yield ChatMessage(
            role="assistant",
            content={"path": final_answer.to_string(), "mime_type": "image/png"},
        )
    elif isinstance(final_answer, AgentAudio):
        yield ChatMessage(
            role="assistant",
            content={"path": final_answer.to_string(), "mime_type": "audio/wav"},
        )
    else:
        yield ChatMessage(role="assistant", content=str(final_answer))


class Monitor:
    def __init__(self, tracked_llm_engine):
        self.step_durations = []
        self.tracked_llm_engine = tracked_llm_engine
        if getattr(self.tracked_llm_engine, "last_input_token_count", "Not found") != "Not found":
            self.total_input_token_count = 0
            self.total_output_token_count = 0

    def update_metrics(self, step_log):
        step_duration = step_log["step_duration"]
        self.step_durations.append(step_duration)
        logger.info(f"Step {len(self.step_durations)}:")
        logger.info(f"- Time taken: {step_duration:.2f} seconds (valid only if step succeeded)")

        if getattr(self.tracked_llm_engine, "last_input_token_count", None) is not None:
            self.total_input_token_count += self.tracked_llm_engine.last_input_token_count
            self.total_output_token_count += self.tracked_llm_engine.last_output_token_count
            logger.info(f"- Input tokens: {self.total_input_token_count}")
            logger.info(f"- Output tokens: {self.total_output_token_count}")