import sys
import os
import argparse
import time
import subprocess

import llava.serve.gradio_web_server as gws

# Execute the pip install command with additional options
subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'flash-attn', '--no-build-isolation', '-U'])


def start_controller():
    print("Starting the controller")
    controller_command = [
        sys.executable,
        "-m",
        "llava.serve.controller",
        "--host",
        "0.0.0.0",
        "--port",
        "10000",
    ]
    print(controller_command)
    return subprocess.Popen(controller_command)


def start_worker(model_path: str, bits=16, revision='main', model_base = None, port=21002):
    print(f"Starting the model worker for the model {model_path}")
    model_name = model_path.strip("/").split("/")[-1]
    assert bits in [4, 8, 16], "It can be only loaded with 16-bit, 8-bit, and 4-bit."
    if bits != 16:
        model_name += f"-{bits}bit"
    worker_command = [
        sys.executable,
        "-m",
        "llava.serve.model_worker",
        "--host",
        "0.0.0.0",
        "--port",
        port,
        "--worker-address",
        f"http://127.0.0.1:{port}",
        "--controller",
        "http://localhost:10000",
        "--model-path",
        model_path,
        "--model-name",
        model_name,
        "--use-flash-attn",
        "--revision",
        revision,
    ]
    if model_base:
        worker_command += [
        "--model-base",
        model_base
        ]
    if bits != 16:
        worker_command += [f"--load-{bits}bit"]
    print(worker_command)
    return subprocess.Popen(worker_command)


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--host", type=str, default="0.0.0.0")
    parser.add_argument("--port", type=int)
    parser.add_argument("--controller-url", type=str, default="http://localhost:10000")
    parser.add_argument("--concurrency-count", type=int, default=5)
    parser.add_argument("--model-list-mode", type=str, default="reload", choices=["once", "reload"])
    parser.add_argument("--share", action="store_true")
    parser.add_argument("--moderate", action="store_true")
    parser.add_argument("--embed", action="store_true")
    gws.args = parser.parse_args()
    gws.models = []

    gws.title_markdown += """

ONLY WORKS WITH GPU! By default, we load the model with 4-bit quantization to make it fit in smaller hardwares. Set the environment variable `bits` to control the quantization.

Set the environment variable `model` to change the model:
[`liuhaotian/llava-v1.6-mistral-7b`](https://huggingface.co/liuhaotian/llava-v1.6-mistral-7b),
[`liuhaotian/llava-v1.6-vicuna-7b`](https://huggingface.co/liuhaotian/llava-v1.6-vicuna-7b),
[`liuhaotian/llava-v1.6-vicuna-13b`](https://huggingface.co/liuhaotian/llava-v1.6-vicuna-13b),
[`liuhaotian/llava-v1.6-34b`](https://huggingface.co/liuhaotian/llava-v1.6-34b).
"""

    print(f"args: {gws.args}")

    model_paths = os.getenv("model", "nvandal/LLaVA-Med-v1.5-7b")
    model_base = os.getenv("model_base", '')
    revisions = os.getenv("revision", "main")
    bits = int(os.getenv("bits", 4))
    concurrency_count = int(os.getenv("concurrency_count", 5))

    controller_proc = start_controller()
    start_worker_port = 21002

    model_paths = model_paths.split(';')
    revisions = revisions.split(';')
    model_base = model_base.split(';')
    assert(len(model_paths)==len(revisions))
    worker_proc = [None]*len(model_paths)
    for i, (model_path, revision, model_base) in enumerate(zip(model_paths,revisions,model_base)):
        print(model_path, revision, model_base)
        worker_proc[i] = start_worker(model_path, bits=bits, revision=revision, model_base=model_base, port=str(start_worker_port+i))

    # Wait for worker and controller to start
    time.sleep(10)

    exit_status = 0
    try:
        demo = gws.build_demo(embed_mode=False, cur_dir='./', concurrency_count=concurrency_count)
        demo.queue(
            status_update_rate=10,
            api_open=False
        ).launch(
            server_name=gws.args.host,
            server_port=gws.args.port,
            share=gws.args.share
        )

    except Exception as e:
        print(e)
        exit_status = 1
    finally:
        for w in worker_proc:
            w.kill()
        controller_proc.kill()

        sys.exit(exit_status)