import time
import logging
import sys

from aiocache import cached
from typing import Any, Optional
import random
import json
import inspect

from fastapi import Request
from starlette.responses import Response, StreamingResponse


from open_webui.models.users import UserModel

from open_webui.socket.main import (
    get_event_call,
    get_event_emitter,
)
from open_webui.functions import generate_function_chat_completion

from open_webui.routers.openai import (
    generate_chat_completion as generate_openai_chat_completion,
)

from open_webui.routers.ollama import (
    generate_chat_completion as generate_ollama_chat_completion,
)

from open_webui.routers.pipelines import (
    process_pipeline_inlet_filter,
    process_pipeline_outlet_filter,
)

from open_webui.models.functions import Functions
from open_webui.models.models import Models


from open_webui.utils.plugin import load_function_module_by_id
from open_webui.utils.models import get_all_models, check_model_access
from open_webui.utils.payload import convert_payload_openai_to_ollama
from open_webui.utils.response import (
    convert_response_ollama_to_openai,
    convert_streaming_response_ollama_to_openai,
)

from open_webui.env import SRC_LOG_LEVELS, GLOBAL_LOG_LEVEL, BYPASS_MODEL_ACCESS_CONTROL


logging.basicConfig(stream=sys.stdout, level=GLOBAL_LOG_LEVEL)
log = logging.getLogger(__name__)
log.setLevel(SRC_LOG_LEVELS["MAIN"])


async def generate_chat_completion(
    request: Request,
    form_data: dict,
    user: Any,
    bypass_filter: bool = False,
):
    if BYPASS_MODEL_ACCESS_CONTROL:
        bypass_filter = True

    models = request.app.state.MODELS

    model_id = form_data["model"]
    if model_id not in models:
        raise Exception("Model not found")

    # Process the form_data through the pipeline
    try:
        form_data = process_pipeline_inlet_filter(request, form_data, user, models)
    except Exception as e:
        raise e

    model = models[model_id]

    # Check if user has access to the model
    if not bypass_filter and user.role == "user":
        try:
            check_model_access(user, model)
        except Exception as e:
            raise e

    if model["owned_by"] == "arena":
        model_ids = model.get("info", {}).get("meta", {}).get("model_ids")
        filter_mode = model.get("info", {}).get("meta", {}).get("filter_mode")
        if model_ids and filter_mode == "exclude":
            model_ids = [
                model["id"]
                for model in list(request.app.state.MODELS.values())
                if model.get("owned_by") != "arena" and model["id"] not in model_ids
            ]

        selected_model_id = None
        if isinstance(model_ids, list) and model_ids:
            selected_model_id = random.choice(model_ids)
        else:
            model_ids = [
                model["id"]
                for model in list(request.app.state.MODELS.values())
                if model.get("owned_by") != "arena"
            ]
            selected_model_id = random.choice(model_ids)

        form_data["model"] = selected_model_id

        if form_data.get("stream") == True:

            async def stream_wrapper(stream):
                yield f"data: {json.dumps({'selected_model_id': selected_model_id})}\n\n"
                async for chunk in stream:
                    yield chunk

            response = await generate_chat_completion(
                form_data, user, bypass_filter=True
            )
            return StreamingResponse(
                stream_wrapper(response.body_iterator),
                media_type="text/event-stream",
                background=response.background,
            )
        else:
            return {
                **(await generate_chat_completion(form_data, user, bypass_filter=True)),
                "selected_model_id": selected_model_id,
            }

    if model.get("pipe"):
        # Below does not require bypass_filter because this is the only route the uses this function and it is already bypassing the filter
        return await generate_function_chat_completion(
            form_data, user=user, models=models
        )
    if model["owned_by"] == "ollama":
        # Using /ollama/api/chat endpoint
        form_data = convert_payload_openai_to_ollama(form_data)
        response = await generate_ollama_chat_completion(
            request=request, form_data=form_data, user=user, bypass_filter=bypass_filter
        )
        if form_data.get("stream"):
            response.headers["content-type"] = "text/event-stream"
            return StreamingResponse(
                convert_streaming_response_ollama_to_openai(response),
                headers=dict(response.headers),
                background=response.background,
            )
        else:
            return convert_response_ollama_to_openai(response)
    else:
        return await generate_openai_chat_completion(
            request=request, form_data=form_data, user=user, bypass_filter=bypass_filter
        )


async def chat_completed(request: Request, form_data: dict, user: Any):
    if not request.app.state.MODELS:
        await get_all_models(request)
    models = request.app.state.MODELS

    data = form_data
    model_id = data["model"]
    if model_id not in models:
        raise Exception("Model not found")

    model = models[model_id]

    try:
        data = process_pipeline_outlet_filter(request, data, user, models)
    except Exception as e:
        return Exception(f"Error: {e}")

    __event_emitter__ = get_event_emitter(
        {
            "chat_id": data["chat_id"],
            "message_id": data["id"],
            "session_id": data["session_id"],
        }
    )

    __event_call__ = get_event_call(
        {
            "chat_id": data["chat_id"],
            "message_id": data["id"],
            "session_id": data["session_id"],
        }
    )

    def get_priority(function_id):
        function = Functions.get_function_by_id(function_id)
        if function is not None and hasattr(function, "valves"):
            # TODO: Fix FunctionModel to include vavles
            return (function.valves if function.valves else {}).get("priority", 0)
        return 0

    filter_ids = [function.id for function in Functions.get_global_filter_functions()]
    if "info" in model and "meta" in model["info"]:
        filter_ids.extend(model["info"]["meta"].get("filterIds", []))
        filter_ids = list(set(filter_ids))

    enabled_filter_ids = [
        function.id
        for function in Functions.get_functions_by_type("filter", active_only=True)
    ]
    filter_ids = [
        filter_id for filter_id in filter_ids if filter_id in enabled_filter_ids
    ]

    # Sort filter_ids by priority, using the get_priority function
    filter_ids.sort(key=get_priority)

    for filter_id in filter_ids:
        filter = Functions.get_function_by_id(filter_id)
        if not filter:
            continue

        if filter_id in request.app.state.FUNCTIONS:
            function_module = request.app.state.FUNCTIONS[filter_id]
        else:
            function_module, _, _ = load_function_module_by_id(filter_id)
            request.app.state.FUNCTIONS[filter_id] = function_module

        if hasattr(function_module, "valves") and hasattr(function_module, "Valves"):
            valves = Functions.get_function_valves_by_id(filter_id)
            function_module.valves = function_module.Valves(
                **(valves if valves else {})
            )

        if not hasattr(function_module, "outlet"):
            continue
        try:
            outlet = function_module.outlet

            # Get the signature of the function
            sig = inspect.signature(outlet)
            params = {"body": data}

            # Extra parameters to be passed to the function
            extra_params = {
                "__model__": model,
                "__id__": filter_id,
                "__event_emitter__": __event_emitter__,
                "__event_call__": __event_call__,
                "__request__": request,
            }

            # Add extra params in contained in function signature
            for key, value in extra_params.items():
                if key in sig.parameters:
                    params[key] = value

            if "__user__" in sig.parameters:
                __user__ = {
                    "id": user.id,
                    "email": user.email,
                    "name": user.name,
                    "role": user.role,
                }

                try:
                    if hasattr(function_module, "UserValves"):
                        __user__["valves"] = function_module.UserValves(
                            **Functions.get_user_valves_by_id_and_user_id(
                                filter_id, user.id
                            )
                        )
                except Exception as e:
                    print(e)

                params = {**params, "__user__": __user__}

            if inspect.iscoroutinefunction(outlet):
                data = await outlet(**params)
            else:
                data = outlet(**params)

        except Exception as e:
            return Exception(f"Error: {e}")

    return data


async def chat_action(request: Request, action_id: str, form_data: dict, user: Any):
    if "." in action_id:
        action_id, sub_action_id = action_id.split(".")
    else:
        sub_action_id = None

    action = Functions.get_function_by_id(action_id)
    if not action:
        raise Exception(f"Action not found: {action_id}")

    if not request.app.state.MODELS:
        await get_all_models(request)
    models = request.app.state.MODELS

    data = form_data
    model_id = data["model"]

    if model_id not in models:
        raise Exception("Model not found")
    model = models[model_id]

    __event_emitter__ = get_event_emitter(
        {
            "chat_id": data["chat_id"],
            "message_id": data["id"],
            "session_id": data["session_id"],
        }
    )
    __event_call__ = get_event_call(
        {
            "chat_id": data["chat_id"],
            "message_id": data["id"],
            "session_id": data["session_id"],
        }
    )

    if action_id in request.app.state.FUNCTIONS:
        function_module = request.app.state.FUNCTIONS[action_id]
    else:
        function_module, _, _ = load_function_module_by_id(action_id)
        request.app.state.FUNCTIONS[action_id] = function_module

    if hasattr(function_module, "valves") and hasattr(function_module, "Valves"):
        valves = Functions.get_function_valves_by_id(action_id)
        function_module.valves = function_module.Valves(**(valves if valves else {}))

    if hasattr(function_module, "action"):
        try:
            action = function_module.action

            # Get the signature of the function
            sig = inspect.signature(action)
            params = {"body": data}

            # Extra parameters to be passed to the function
            extra_params = {
                "__model__": model,
                "__id__": sub_action_id if sub_action_id is not None else action_id,
                "__event_emitter__": __event_emitter__,
                "__event_call__": __event_call__,
                "__request__": request,
            }

            # Add extra params in contained in function signature
            for key, value in extra_params.items():
                if key in sig.parameters:
                    params[key] = value

            if "__user__" in sig.parameters:
                __user__ = {
                    "id": user.id,
                    "email": user.email,
                    "name": user.name,
                    "role": user.role,
                }

                try:
                    if hasattr(function_module, "UserValves"):
                        __user__["valves"] = function_module.UserValves(
                            **Functions.get_user_valves_by_id_and_user_id(
                                action_id, user.id
                            )
                        )
                except Exception as e:
                    print(e)

                params = {**params, "__user__": __user__}

            if inspect.iscoroutinefunction(action):
                data = await action(**params)
            else:
                data = action(**params)

        except Exception as e:
            return Exception(f"Error: {e}")

    return data