import argparse
import json
import time
from concurrent.futures import ThreadPoolExecutor
from functools import partial

import guidance
from sglang.test.test_utils import (
    add_common_other_args_and_parse,
    call_generate_outlines,
)
from sglang.utils import dump_state_text
from tqdm import tqdm

# there are some FSM bugs with json regex converted from pydantic model
# here use a string regex instead
# regex_string = build_regex_from_object(HarryPoterRole)
character_regex = (
    r"""\{\n"""
    + r"""    "name": "[\w\d\s]{1,16}",\n"""
    + r"""    "house": "(Gryffindor|Slytherin|Ravenclaw|Hufflepuff)",\n"""
    + r"""    "blood status": "(Pure-blood|Half-blood|Muggle-born)",\n"""
    + r"""    "occupation": "(student|teacher|auror|ministry of magic|death eater|order of the phoenix)",\n"""
    + r"""    "wand": \{\n"""
    + r"""        "wood": "[\w\d\s]{1,16}",\n"""
    + r"""        "core": "[\w\d\s]{1,16}",\n"""
    + r"""        "length": [0-9]{1,2}\.[0-9]{0,2}\n"""
    + r"""    \},\n"""
    + r"""    "alive": "(Alive|Deceased)",\n"""
    + r"""    "patronus": "[\w\d\s]{1,16}",\n"""
    + r"""    "bogart": "[\w\d\s]{1,16}"\n"""
    + r"""\}"""
)

# fmt: off
def character_gen(name, generate):
    s = name+ " is a character in Harry Potter. Please fill in the following information about him/her.\n"
    s += generate(s, max_tokens=256, regex=character_regex)
    return s
# fmt: on


@guidance
def character_maker(lm, name):
    regex_str_no_quote = r"[\w\d\s]+"
    regex_float = r"[0-9]+\.[0-9]+"
    lm += f"""\
    {name} is a character in Harry Potter. Please fill in the following information about him/her.
    {{
        "name": "{guidance.gen("name", max_tokens=16, regex=regex_str_no_quote)}",
        "house": "{guidance.select(options=['Gryffindor', 'Slytherin', 'Ravenclaw', 'Hufflepuff'], name='house')}",
        "blood status": "{guidance.select(options=['Pure-blood', 'Half-blood', 'Muggle-born'], name='blood status')}",
        "occupation": "{guidance.select(options=['student', 'teacher', 'auror', 'ministry of magic', 'death eater', 'order of the phoenix'], name='occupation')}",
        "wand": {{
            "wood": "{guidance.gen("wood", max_tokens=16, regex=regex_str_no_quote)}",
            "core": "{guidance.gen('core', max_tokens=16, regex=regex_str_no_quote)}",
            "length": {guidance.gen('length', max_tokens=10, regex=regex_float)}
        }},
        "alive": "{guidance.select(options=['Alive', 'Deceased'], name='alive')}",
        "patronus": "{guidance.gen('patronus', max_tokens=16, regex=regex_str_no_quote)}",
        "bogart": "{guidance.gen('bogart', max_tokens=16, regex=regex_str_no_quote)}"
    }}
    """

    return lm


def main(args):
    arguments = []
    with open(args.data_path, "r") as f:
        for line in f:
            arguments.append({"name": line.strip()})
    arguments = arguments[: args.num_jsons]

    states = [None] * len(arguments)

    # Select backend
    if args.backend == "vllm":
        url = f"{args.host}:{args.port}/generate"
        generate = partial(call_generate_outlines, url=url, temperature=0)

        def func(i):
            states[i] = character_gen(**arguments[i], generate=generate)

        get_one_answer = func
    elif args.backend == "guidance":
        model = guidance.models.LlamaCpp(
            "/home/ubuntu/model_weights/Llama-2-7b-chat-hf/ggml-model-f16.gguf",
            n_gpu_layers=-1,
            n_ctx=4096,
        )

        def func(i):
            lm = model + character_maker(**arguments[i])
            states[i] = lm

        get_one_answer = func
    else:
        raise ValueError(f"Invalid backend: {args.backend}")

    tic = time.time()
    if args.parallel == 1:
        for i in tqdm(range(len(arguments))):
            get_one_answer(i)
    else:
        with ThreadPoolExecutor(args.parallel) as executor:
            rets = executor.map(get_one_answer, list(range(len(arguments))))
            for _ in rets:
                pass

    latency = time.time() - tic

    # Compute accuracy
    print(f"Latency: {latency:.3f}")

    # Write results
    dump_state_text(f"tmp_output_{args.backend}.txt", states)

    with open(args.result_file, "a") as fout:
        value = {
            "task": "json_fast_forward",
            "backend": args.backend,
            "latency": round(latency, 3),
            "num_jsons": args.num_jsons,
            "parallel": args.parallel,
        }
        fout.write(json.dumps(value) + "\n")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--data-path", type=str, default="dataset.txt")
    parser.add_argument("--num-jsons", type=int, default=50)
    args = add_common_other_args_and_parse(parser)
    main(args)
