#
# Copyright (c) 2024-2026, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#

import glob
import json
import os
from datetime import datetime

from dotenv import load_dotenv
from loguru import logger

from pipecat.audio.vad.silero import SileroVADAnalyzer
from pipecat.evals.transport import EvalTransportParams
from pipecat.frames.frames import LLMRunFrame, TTSSpeakFrame
from pipecat.pipeline.pipeline import Pipeline
from pipecat.pipeline.worker import PipelineParams, PipelineWorker, ProcessorUnusablePolicy
from pipecat.processors.aggregators.llm_context import LLMContext
from pipecat.processors.aggregators.llm_response_universal import (
    LLMContextAggregatorPair,
    LLMUserAggregatorParams,
)
from pipecat.runner.types import RunnerArguments
from pipecat.runner.utils import create_transport
from pipecat.services.anthropic.llm import AnthropicLLMService
from pipecat.services.cartesia.tts import CartesiaTTSService
from pipecat.services.deepgram.stt import DeepgramSTTService
from pipecat.services.llm_service import FunctionCallParams
from pipecat.transports.base_transport import BaseTransport, TransportParams
from pipecat.transports.daily.transport import DailyParams
from pipecat.transports.websocket.fastapi import FastAPIWebsocketParams
from pipecat.workers.runner import WorkerRunner

load_dotenv(override=True)


BASE_FILENAME = "/tmp/pipecat_conversation_"


async def get_current_weather(params: FunctionCallParams, location: str, format: str):
    """Get the current weather.

    Args:
        location: The city and state, e.g. "San Francisco, CA".
        format: The temperature unit to use. Must be either "celsius" or "fahrenheit". Infer this from the user's location.
    """
    temperature = 75 if format == "fahrenheit" else 24
    await params.result_callback(
        {
            "conditions": "nice",
            "temperature": temperature,
            "format": format,
            "timestamp": datetime.now().strftime("%Y%m%d_%H%M%S"),
        }
    )


async def get_saved_conversation_filenames(params: FunctionCallParams):
    """Get a list of saved conversation histories. Returns a list of filenames. Each filename includes a date and timestamp. Each file is conversation history that can be loaded into this session."""
    # Construct the full pattern including the BASE_FILENAME
    full_pattern = f"{BASE_FILENAME}*.json"

    # Use glob to find all matching files
    matching_files = glob.glob(full_pattern)
    logger.debug(f"matching files: {matching_files}")

    await params.result_callback({"filenames": matching_files})


async def save_conversation(params: FunctionCallParams):
    """Save the current conversation. Use this function to persist the current conversation to external storage."""
    timestamp = datetime.now().strftime("%Y-%m-%d_%H:%M:%S")
    filename = f"{BASE_FILENAME}{timestamp}.json"
    logger.debug(
        f"writing conversation to {filename}\n{json.dumps(params.context.get_messages(), indent=4)}"
    )
    try:
        with open(filename, "w") as file:
            messages = params.context.get_messages()
            # remove the last message, which is the instruction we just gave to save the conversation
            messages.pop()
            json.dump(messages, file, indent=2)
        await params.result_callback({"success": True})
    except Exception as e:
        await params.result_callback({"success": False, "error": str(e)})


async def load_conversation(params: FunctionCallParams, filename: str):
    """Load a conversation history. Use this function to load a conversation history into the current session.

    Args:
        filename: The filename of the conversation history to load.
    """
    logger.debug(f"loading conversation from {filename}")
    try:
        with open(filename) as file:
            params.context.set_messages(json.load(file))
            logger.debug(
                f"loaded conversation from {filename}\n{json.dumps(params.context.get_messages(), indent=4)}"
            )
        await params.llm.queue_frame(TTSSpeakFrame("Ok, I've loaded that conversation."))
    except Exception as e:
        await params.result_callback({"success": False, "error": str(e)})


system_instruction = "You are a helpful assistant in a voice conversation. Your responses will be spoken aloud, so avoid emojis, bullet points, or other formatting that can't be spoken. Respond to what the user said in a succinct, creative and helpful way. Prefer responses that are one sentence long unless you are asked for a longer or more detailed response."


# We use lambdas to defer transport parameter creation until the transport
# type is selected at runtime.
transport_params = {
    "eval": lambda: EvalTransportParams(
        audio_in_enabled=True,
        audio_out_enabled=True,
    ),
    "daily": lambda: DailyParams(
        audio_in_enabled=True,
        audio_out_enabled=True,
    ),
    "twilio": lambda: FastAPIWebsocketParams(
        audio_in_enabled=True,
        audio_out_enabled=True,
    ),
    "webrtc": lambda: TransportParams(
        audio_in_enabled=True,
        audio_out_enabled=True,
    ),
}


async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
    logger.info("Starting bot")

    stt = DeepgramSTTService(api_key=os.environ["DEEPGRAM_API_KEY"])

    tts = CartesiaTTSService(
        api_key=os.environ["CARTESIA_API_KEY"],
        settings=CartesiaTTSService.Settings(
            voice="86e30c1d-714b-4074-a1f2-1cb6b552fb49",
        ),
    )

    llm = AnthropicLLMService(
        api_key=os.environ["ANTHROPIC_API_KEY"],
        settings=AnthropicLLMService.Settings(
            system_instruction=system_instruction,
        ),
    )

    context = LLMContext(
        tools=[
            get_current_weather,
            save_conversation,
            get_saved_conversation_filenames,
            load_conversation,
        ]
    )
    user_aggregator, assistant_aggregator = LLMContextAggregatorPair(
        context,
        user_params=LLMUserAggregatorParams(vad_analyzer=SileroVADAnalyzer()),
    )

    pipeline = Pipeline(
        [
            transport.input(),  # Transport user input
            stt,  # STT
            user_aggregator,
            llm,  # LLM
            tts,
            transport.output(),  # Transport bot output
            assistant_aggregator,
        ]
    )

    worker = PipelineWorker(
        pipeline,
        params=PipelineParams(
            enable_metrics=True,
            enable_usage_metrics=True,
        ),
        idle_timeout_secs=runner_args.pipeline_idle_timeout_secs,
        processor_unusable_policy=ProcessorUnusablePolicy.END,
    )

    runner = WorkerRunner(handle_sigint=runner_args.handle_sigint)

    await runner.add_workers(worker)

    @transport.event_handler("on_client_connected")
    async def on_client_connected(transport, client):
        logger.info("Client connected")
        # Kick off the conversation.
        context.add_message(
            {
                "role": "developer",
                "content": "Start the call by saying the word 'hello'. Say only that word.",
            }
        )
        await worker.queue_frames([LLMRunFrame()])

    @transport.event_handler("on_client_disconnected")
    async def on_client_disconnected(transport, client):
        logger.info("Client disconnected")
        await runner.cancel()

    await runner.run()


async def bot(runner_args: RunnerArguments):
    """Main bot entry point compatible with Pipecat Cloud."""
    transport = await create_transport(runner_args, transport_params)
    await run_bot(transport, runner_args)


if __name__ == "__main__":
    from pipecat.runner.run import main

    main()