# SPDX-License-Identifier: Apache-2.0

import pytest
import ray

import vllm
from tests.utils import fork_new_process_for_each_test
from vllm.lora.request import LoRARequest

from ..utils import multi_gpu_test

MODEL_PATH = "meta-llama/Llama-2-7b-hf"

EXPECTED_NO_LORA_OUTPUT = [
    "\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_75 (icao VARCHAR, airport VARCHAR)\n\n question: Name the ICAO for lilongwe international airport [/user] [assistant]\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_76 (icao VARCHAR, airport VARCHAR)\n\n question: Name the ICAO for lilongwe international airport [/user] [assistant]\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_77 (icao VARCHAR, airport VARCHAR)\n\n question: Name the ICAO for lilongwe international airport [/user] [assistant]\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_78 (icao VARCHAR, airport VARCHAR)\n\n question: Name the ICAO for lilongwe international airport [/user]",  # noqa: E501
    " Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_11 (nationality VARCHAR, elector VARCHAR)\n\n question: When Anchero Pantaleone was the elector what is under nationality? ",  # noqa: E501
    "\n\n answer: 1\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_96 (one_mora VARCHAR, gloss VARCHAR, accented_mora VARCHAR)\n\n question: What is the one mora for a high tone mora with a gloss of /˧kot/ [kòt]? [/user] [assistant]\n\n answer: 2\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_97 (one_mora VARCHAR, gloss VARCHAR, accented_mora VARCHAR)\n\n question: What is the one mora for a high tone mora with a gloss of /˧kot/ [kòt]? [/user] [assistant]\n\n answer: 2\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_98 (one_mora VARCHAR, gloss VARCHAR, accented_mora VARCHAR)\n\n question: What is the one m",  # noqa: E501
    " Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE candidate (people_id VARCHAR, unsure_rate INTEGER); CREATE TABLE people (sex VARCHAR, people_id VARCHAR)\n\n question: which gender got the highest average uncertain ratio. ",  # noqa: E501
    " Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_60 (pick INTEGER, former_wnba_team VARCHAR)\n\n question: What pick was a player that previously played for the Minnesota Lynx? ",  # noqa: E501
    "\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_28138035_4 (womens_doubles VARCHAR, mens_singles VARCHAR)\n\n question: Name the women's doubles for werner schlager [/user] [assistant]\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_28138035_4 (womens_doubles VARCHAR, mens_singles VARCHAR)\n\n question: Name the women's doubles for werner schlager [/user] [assistant]\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_28138035_4 (womens_doubles VARCHAR, mens_singles VARCHAR)\n\n question: Name the women's doubles for werner schlager [/user] [assistant]\n\n [user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE",  # noqa: E501
]
EXPECTED_LORA_OUTPUT = [
    "  SELECT icao FROM table_name_74 WHERE airport = 'lilongwe international airport' ",  # noqa: E501
    "  SELECT nationality FROM table_name_11 WHERE elector = 'anchero pantaleone' ",  # noqa: E501
    "  SELECT one_mora FROM table_name_95 WHERE gloss = 'low tone mora with a gloss of /˩okiru/' [òkìɽɯ́] AND accented_mora = 'low tone mora with a gloss of /˩okiru/' [òkìɽɯ́] ",  # noqa: E501
    "  SELECT sex FROM people WHERE people_id IN (SELECT people_id FROM candidate GROUP BY sex ORDER BY COUNT(people_id) DESC LIMIT 1) ",  # noqa: E501
    "  SELECT pick FROM table_name_60 WHERE former_wnba_team = 'Minnesota Lynx' ",  # noqa: E501
    "  SELECT womens_doubles FROM table_28138035_4 WHERE mens_singles = 'Werner Schlager' "  # noqa: E501
]


def do_sample(llm: vllm.LLM, lora_path: str, lora_id: int) -> list[str]:
    prompts = [
        "[user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_74 (icao VARCHAR, airport VARCHAR)\n\n question: Name the ICAO for lilongwe international airport [/user] [assistant]",  # noqa: E501
        "[user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_11 (nationality VARCHAR, elector VARCHAR)\n\n question: When Anchero Pantaleone was the elector what is under nationality? [/user] [assistant]",  # noqa: E501
        "[user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_95 (one_mora VARCHAR, gloss VARCHAR, accented_mora VARCHAR)\n\n question: What is the one mora for a low tone mora with a gloss of /˩okiru/ [òkìɽɯ́]? [/user] [assistant]",  # noqa: E501
        "[user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE candidate (people_id VARCHAR, unsure_rate INTEGER); CREATE TABLE people (sex VARCHAR, people_id VARCHAR)\n\n question: which gender got the highest average uncertain ratio. [/user] [assistant]",  # noqa: E501
        "[user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_name_60 (pick INTEGER, former_wnba_team VARCHAR)\n\n question: What pick was a player that previously played for the Minnesota Lynx? [/user] [assistant]",  # noqa: E501
        "[user] Write a SQL query to answer the question based on the table schema.\n\n context: CREATE TABLE table_28138035_4 (womens_doubles VARCHAR, mens_singles VARCHAR)\n\n question: Name the women's doubles for werner schlager [/user] [assistant]"  # noqa: E501
    ]
    sampling_params = vllm.SamplingParams(temperature=0,
                                          max_tokens=256,
                                          stop=["[/assistant]"])
    outputs = llm.generate(
        prompts,
        sampling_params,
        lora_request=LoRARequest(str(lora_id), lora_id, lora_path)
        if lora_id else None)
    # Print the outputs.
    generated_texts: list[str] = []
    for output in outputs:
        prompt = output.prompt
        generated_text = output.outputs[0].text
        generated_texts.append(generated_text)
        print(f"Prompt: {prompt!r}, Generated text: {generated_text!r}")
    return generated_texts


def generate_and_test(llm, sql_lora_files):
    print("lora adapter created")
    assert do_sample(llm, sql_lora_files, lora_id=0) == EXPECTED_NO_LORA_OUTPUT

    print("lora 1")
    assert do_sample(llm, sql_lora_files, lora_id=1) == EXPECTED_LORA_OUTPUT

    print("no lora")
    assert do_sample(llm, sql_lora_files, lora_id=0) == EXPECTED_NO_LORA_OUTPUT

    print("lora 2")
    assert do_sample(llm, sql_lora_files, lora_id=2) == EXPECTED_LORA_OUTPUT

    print("removing lora")


@pytest.fixture(autouse=True)
def v1(run_with_both_engines_lora):
    # Simple autouse wrapper to run both engines for each test
    # This can be promoted up to conftest.py to run for every
    # test in a package
    pass


@fork_new_process_for_each_test
def test_llama_lora(sql_lora_files):

    llm = vllm.LLM(MODEL_PATH,
                   enable_lora=True,
                   max_num_seqs=16,
                   max_loras=4,
                   tensor_parallel_size=1,
                   enable_chunked_prefill=True)
    generate_and_test(llm, sql_lora_files)


# Skipping for v1 as v1 doesn't have a good way to expose the num_gpu_blocks
# used by the engine yet.
@pytest.mark.skip_v1
@fork_new_process_for_each_test
def test_llama_lora_warmup(sql_lora_files):
    """Test that the LLM initialization works with a warmup LORA path and
    is more conservative"""

    @ray.remote(num_gpus=1)
    def get_num_gpu_blocks_lora():
        llm = vllm.LLM(MODEL_PATH, enable_lora=True, max_num_seqs=16)
        num_gpu_blocks_lora_warmup = llm.llm_engine.cache_config.num_gpu_blocks
        return num_gpu_blocks_lora_warmup

    @ray.remote(num_gpus=1)
    def get_num_gpu_blocks_no_lora():
        llm = vllm.LLM(MODEL_PATH, max_num_seqs=16)
        num_gpu_blocks_no_lora_warmup = (
            llm.llm_engine.cache_config.num_gpu_blocks)
        return num_gpu_blocks_no_lora_warmup

    num_gpu_blocks_lora_warmup = ray.get(get_num_gpu_blocks_lora.remote())
    num_gpu_blocks_no_lora_warmup = ray.get(
        get_num_gpu_blocks_no_lora.remote())
    assert num_gpu_blocks_lora_warmup < num_gpu_blocks_no_lora_warmup, (
        "The warmup with lora should be more "
        "conservative than without lora, therefore the number of "
        "memory blocks for the KV cache should be "
        "less when using lora than when not using lora")


@multi_gpu_test(num_gpus=4)
@fork_new_process_for_each_test
def test_llama_lora_tp4(sql_lora_files):

    llm = vllm.LLM(
        MODEL_PATH,
        enable_lora=True,
        max_num_seqs=16,
        max_loras=4,
        tensor_parallel_size=4,
        enable_chunked_prefill=True,
    )
    generate_and_test(llm, sql_lora_files)


@multi_gpu_test(num_gpus=4)
@fork_new_process_for_each_test
def test_llama_lora_tp4_fully_sharded_loras(sql_lora_files):

    llm = vllm.LLM(
        MODEL_PATH,
        enable_lora=True,
        max_num_seqs=16,
        max_loras=4,
        tensor_parallel_size=4,
        fully_sharded_loras=True,
        enable_chunked_prefill=True,
    )
    generate_and_test(llm, sql_lora_files)


@multi_gpu_test(num_gpus=4)
@fork_new_process_for_each_test
def test_llama_lora_tp4_fully_sharded_enable_bias(sql_lora_files):

    llm = vllm.LLM(
        MODEL_PATH,
        enable_lora=True,
        max_num_seqs=16,
        max_loras=4,
        tensor_parallel_size=4,
        fully_sharded_loras=True,
        enable_lora_bias=True,
        enable_chunked_prefill=True,
    )
    generate_and_test(llm, sql_lora_files)