# 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

from typing import Any, Dict, List, Optional

import fire
import httpx

from llama_toolchain.core.datatypes import RemoteProviderConfig

from .api import *  # noqa: F403


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_banks/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_banks/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_bank/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_bank/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="dragon-roberta-query-2",
            chunk_size_in_tokens=512,
            overlap_size_in_tokens=64,
        ),
    )
    print(bank)

    retrieved_bank = await client.get_memory_bank(bank.bank_id)
    assert retrieved_bank is not None
    assert retrieved_bank.config.embedding_model == "dragon-roberta-query-2"

    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)
    ]

    # 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)