# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the terms described in the LICENSE file in
# the root directory of this source tree.

import asyncio
import json
import os
from pathlib import Path

from typing import Any, Dict, List, Optional

import fire
import httpx
from termcolor import cprint

from llama_stack.distribution.datatypes import RemoteProviderConfig

from llama_stack.apis.memory import *  # noqa: F403
from llama_stack.providers.utils.memory.file_utils import data_url_from_file


async def get_client_impl(config: RemoteProviderConfig, _deps: Any) -> Memory:
    return MemoryClient(config.url)


class MemoryClient(Memory):
    def __init__(self, base_url: str):
        self.base_url = base_url

    async def initialize(self) -> None:
        pass

    async def shutdown(self) -> None:
        pass

    async def get_memory_bank(self, bank_id: str) -> Optional[MemoryBank]:
        async with httpx.AsyncClient() as client:
            r = await client.get(
                f"{self.base_url}/memory/get",
                params={
                    "bank_id": bank_id,
                },
                headers={"Content-Type": "application/json"},
                timeout=20,
            )
            r.raise_for_status()
            d = r.json()
            if not d:
                return None
            return MemoryBank(**d)

    async def create_memory_bank(
        self,
        name: str,
        config: MemoryBankConfig,
        url: Optional[URL] = None,
    ) -> MemoryBank:
        async with httpx.AsyncClient() as client:
            r = await client.post(
                f"{self.base_url}/memory/create",
                json={
                    "name": name,
                    "config": config.dict(),
                    "url": url,
                },
                headers={"Content-Type": "application/json"},
                timeout=20,
            )
            r.raise_for_status()
            d = r.json()
            if not d:
                return None
            return MemoryBank(**d)

    async def insert_documents(
        self,
        bank_id: str,
        documents: List[MemoryBankDocument],
    ) -> None:
        async with httpx.AsyncClient() as client:
            r = await client.post(
                f"{self.base_url}/memory/insert",
                json={
                    "bank_id": bank_id,
                    "documents": [d.dict() for d in documents],
                },
                headers={"Content-Type": "application/json"},
                timeout=20,
            )
            r.raise_for_status()

    async def query_documents(
        self,
        bank_id: str,
        query: InterleavedTextMedia,
        params: Optional[Dict[str, Any]] = None,
    ) -> QueryDocumentsResponse:
        async with httpx.AsyncClient() as client:
            r = await client.post(
                f"{self.base_url}/memory/query",
                json={
                    "bank_id": bank_id,
                    "query": query,
                    "params": params,
                },
                headers={"Content-Type": "application/json"},
                timeout=20,
            )
            r.raise_for_status()
            return QueryDocumentsResponse(**r.json())


async def run_main(host: str, port: int, stream: bool):
    client = MemoryClient(f"http://{host}:{port}")

    # create a memory bank
    bank = await client.create_memory_bank(
        name="test_bank",
        config=VectorMemoryBankConfig(
            bank_id="test_bank",
            embedding_model="all-MiniLM-L6-v2",
            chunk_size_in_tokens=512,
            overlap_size_in_tokens=64,
        ),
    )
    cprint(json.dumps(bank.dict(), indent=4), "green")

    retrieved_bank = await client.get_memory_bank(bank.bank_id)
    assert retrieved_bank is not None
    assert retrieved_bank.config.embedding_model == "all-MiniLM-L6-v2"

    urls = [
        "memory_optimizations.rst",
        "chat.rst",
        "llama3.rst",
        "datasets.rst",
        "qat_finetune.rst",
        "lora_finetune.rst",
    ]
    documents = [
        MemoryBankDocument(
            document_id=f"num-{i}",
            content=URL(
                uri=f"https://raw.githubusercontent.com/pytorch/torchtune/main/docs/source/tutorials/{url}"
            ),
            mime_type="text/plain",
        )
        for i, url in enumerate(urls)
    ]

    this_dir = os.path.dirname(__file__)
    files = [Path(this_dir).parent.parent.parent / "CONTRIBUTING.md"]
    documents += [
        MemoryBankDocument(
            document_id=f"num-{i}",
            content=data_url_from_file(path),
        )
        for i, path in enumerate(files)
    ]

    # insert some documents
    await client.insert_documents(
        bank_id=bank.bank_id,
        documents=documents,
    )

    # query the documents
    response = await client.query_documents(
        bank_id=bank.bank_id,
        query=[
            "How do I use Lora?",
        ],
    )
    for chunk, score in zip(response.chunks, response.scores):
        print(f"Score: {score}")
        print(f"Chunk:\n========\n{chunk}\n========\n")

    response = await client.query_documents(
        bank_id=bank.bank_id,
        query=[
            "Tell me more about llama3 and torchtune",
        ],
    )
    for chunk, score in zip(response.chunks, response.scores):
        print(f"Score: {score}")
        print(f"Chunk:\n========\n{chunk}\n========\n")


def main(host: str, port: int, stream: bool = True):
    asyncio.run(run_main(host, port, stream))


if __name__ == "__main__":
    fire.Fire(main)