# Copyright (c) 2024 Microsoft Corporation.
# Licensed under the MIT License

"""CLI implementation of the query subcommand."""

import asyncio
import sys
from pathlib import Path
from typing import TYPE_CHECKING, Any

from graphrag_storage import create_storage

import graphrag.api as api
from graphrag.callbacks.noop_query_callbacks import NoopQueryCallbacks
from graphrag.config.load_config import load_config
from graphrag.config.models.graph_rag_config import GraphRagConfig
from graphrag.utils.storage import load_table_from_storage, storage_has_table

if TYPE_CHECKING:
    import pandas as pd

# ruff: noqa: T201


def run_global_search(
    data_dir: Path | None,
    root_dir: Path,
    community_level: int | None,
    dynamic_community_selection: bool,
    response_type: str,
    streaming: bool,
    query: str,
    verbose: bool,
):
    """Perform a global search with a given query.

    Loads index files required for global search and calls the Query API.
    """
    cli_overrides: dict[str, Any] = {}
    if data_dir:
        cli_overrides["output"] = {"base_dir": str(data_dir)}
    config = load_config(
        root_dir=root_dir,
        cli_overrides=cli_overrides,
    )

    dataframe_dict = _resolve_output_files(
        config=config,
        output_list=[
            "entities",
            "communities",
            "community_reports",
        ],
        optional_list=[],
    )

    entities: pd.DataFrame = dataframe_dict["entities"]
    communities: pd.DataFrame = dataframe_dict["communities"]
    community_reports: pd.DataFrame = dataframe_dict["community_reports"]

    if streaming:

        async def run_streaming_search():
            full_response = ""
            context_data = {}

            def on_context(context: Any) -> None:
                nonlocal context_data
                context_data = context

            callbacks = NoopQueryCallbacks()
            callbacks.on_context = on_context

            async for stream_chunk in api.global_search_streaming(
                config=config,
                entities=entities,
                communities=communities,
                community_reports=community_reports,
                community_level=community_level,
                dynamic_community_selection=dynamic_community_selection,
                response_type=response_type,
                query=query,
                callbacks=[callbacks],
                verbose=verbose,
            ):
                full_response += stream_chunk
                print(stream_chunk, end="")
                sys.stdout.flush()
            print()
            return full_response, context_data

        return asyncio.run(run_streaming_search())
    # not streaming
    response, context_data = asyncio.run(
        api.global_search(
            config=config,
            entities=entities,
            communities=communities,
            community_reports=community_reports,
            community_level=community_level,
            dynamic_community_selection=dynamic_community_selection,
            response_type=response_type,
            query=query,
            verbose=verbose,
        )
    )
    print(response)

    return response, context_data


def run_local_search(
    data_dir: Path | None,
    root_dir: Path,
    community_level: int,
    response_type: str,
    streaming: bool,
    query: str,
    verbose: bool,
):
    """Perform a local search with a given query.

    Loads index files required for local search and calls the Query API.
    """
    cli_overrides: dict[str, Any] = {}
    if data_dir:
        cli_overrides["output"] = {"base_dir": str(data_dir)}
    config = load_config(
        root_dir=root_dir,
        cli_overrides=cli_overrides,
    )

    dataframe_dict = _resolve_output_files(
        config=config,
        output_list=[
            "communities",
            "community_reports",
            "text_units",
            "relationships",
            "entities",
        ],
        optional_list=[
            "covariates",
        ],
    )

    communities: pd.DataFrame = dataframe_dict["communities"]
    community_reports: pd.DataFrame = dataframe_dict["community_reports"]
    text_units: pd.DataFrame = dataframe_dict["text_units"]
    relationships: pd.DataFrame = dataframe_dict["relationships"]
    entities: pd.DataFrame = dataframe_dict["entities"]
    covariates: pd.DataFrame | None = dataframe_dict["covariates"]

    if streaming:

        async def run_streaming_search():
            full_response = ""
            context_data = {}

            def on_context(context: Any) -> None:
                nonlocal context_data
                context_data = context

            callbacks = NoopQueryCallbacks()
            callbacks.on_context = on_context

            async for stream_chunk in api.local_search_streaming(
                config=config,
                entities=entities,
                communities=communities,
                community_reports=community_reports,
                text_units=text_units,
                relationships=relationships,
                covariates=covariates,
                community_level=community_level,
                response_type=response_type,
                query=query,
                callbacks=[callbacks],
                verbose=verbose,
            ):
                full_response += stream_chunk
                print(stream_chunk, end="")
                sys.stdout.flush()
            print()
            return full_response, context_data

        return asyncio.run(run_streaming_search())
    # not streaming
    response, context_data = asyncio.run(
        api.local_search(
            config=config,
            entities=entities,
            communities=communities,
            community_reports=community_reports,
            text_units=text_units,
            relationships=relationships,
            covariates=covariates,
            community_level=community_level,
            response_type=response_type,
            query=query,
            verbose=verbose,
        )
    )
    print(response)

    return response, context_data


def run_drift_search(
    data_dir: Path | None,
    root_dir: Path,
    community_level: int,
    response_type: str,
    streaming: bool,
    query: str,
    verbose: bool,
):
    """Perform a local search with a given query.

    Loads index files required for local search and calls the Query API.
    """
    cli_overrides: dict[str, Any] = {}
    if data_dir:
        cli_overrides["output"] = {"base_dir": str(data_dir)}
    config = load_config(
        root_dir=root_dir,
        cli_overrides=cli_overrides,
    )

    dataframe_dict = _resolve_output_files(
        config=config,
        output_list=[
            "communities",
            "community_reports",
            "text_units",
            "relationships",
            "entities",
        ],
    )

    communities: pd.DataFrame = dataframe_dict["communities"]
    community_reports: pd.DataFrame = dataframe_dict["community_reports"]
    text_units: pd.DataFrame = dataframe_dict["text_units"]
    relationships: pd.DataFrame = dataframe_dict["relationships"]
    entities: pd.DataFrame = dataframe_dict["entities"]

    if streaming:

        async def run_streaming_search():
            full_response = ""
            context_data = {}

            def on_context(context: Any) -> None:
                nonlocal context_data
                context_data = context

            callbacks = NoopQueryCallbacks()
            callbacks.on_context = on_context

            async for stream_chunk in api.drift_search_streaming(
                config=config,
                entities=entities,
                communities=communities,
                community_reports=community_reports,
                text_units=text_units,
                relationships=relationships,
                community_level=community_level,
                response_type=response_type,
                query=query,
                callbacks=[callbacks],
                verbose=verbose,
            ):
                full_response += stream_chunk
                print(stream_chunk, end="")
                sys.stdout.flush()
            print()
            return full_response, context_data

        return asyncio.run(run_streaming_search())

    # not streaming
    response, context_data = asyncio.run(
        api.drift_search(
            config=config,
            entities=entities,
            communities=communities,
            community_reports=community_reports,
            text_units=text_units,
            relationships=relationships,
            community_level=community_level,
            response_type=response_type,
            query=query,
            verbose=verbose,
        )
    )
    print(response)

    return response, context_data


def run_basic_search(
    data_dir: Path | None,
    root_dir: Path,
    response_type: str,
    streaming: bool,
    query: str,
    verbose: bool,
):
    """Perform a basics search with a given query.

    Loads index files required for basic search and calls the Query API.
    """
    cli_overrides: dict[str, Any] = {}
    if data_dir:
        cli_overrides["output"] = {"base_dir": str(data_dir)}
    config = load_config(
        root_dir=root_dir,
        cli_overrides=cli_overrides,
    )

    dataframe_dict = _resolve_output_files(
        config=config,
        output_list=[
            "text_units",
        ],
    )

    text_units: pd.DataFrame = dataframe_dict["text_units"]

    if streaming:

        async def run_streaming_search():
            full_response = ""
            context_data = {}

            def on_context(context: Any) -> None:
                nonlocal context_data
                context_data = context

            callbacks = NoopQueryCallbacks()
            callbacks.on_context = on_context

            async for stream_chunk in api.basic_search_streaming(
                config=config,
                text_units=text_units,
                response_type=response_type,
                query=query,
                callbacks=[callbacks],
                verbose=verbose,
            ):
                full_response += stream_chunk
                print(stream_chunk, end="")
                sys.stdout.flush()
            print()
            return full_response, context_data

        return asyncio.run(run_streaming_search())
    # not streaming
    response, context_data = asyncio.run(
        api.basic_search(
            config=config,
            text_units=text_units,
            response_type=response_type,
            query=query,
            verbose=verbose,
        )
    )
    print(response)

    return response, context_data


def _resolve_output_files(
    config: GraphRagConfig,
    output_list: list[str],
    optional_list: list[str] | None = None,
) -> dict[str, Any]:
    """Read indexing output files to a dataframe dict."""
    dataframe_dict = {}
    storage_obj = create_storage(config.output)
    for name in output_list:
        df_value = asyncio.run(load_table_from_storage(name=name, storage=storage_obj))
        dataframe_dict[name] = df_value

    # for optional output files, set the dict entry to None instead of erroring out if it does not exist
    if optional_list:
        for optional_file in optional_list:
            file_exists = asyncio.run(storage_has_table(optional_file, storage_obj))
            if file_exists:
                df_value = asyncio.run(
                    load_table_from_storage(name=optional_file, storage=storage_obj)
                )
                dataframe_dict[optional_file] = df_value
            else:
                dataframe_dict[optional_file] = None
    return dataframe_dict
