"""
Command-line interface for health-function-lm.

Usage
-----
  health-fn "Log my blood pressure as 120/80"
  health-fn --pretty "What is my resting heart rate?"
  echo "Log weight 70kg" | health-fn
"""

import argparse
import json
import sys

from .model import HealthFunctionLM


def main():
    parser = argparse.ArgumentParser(
        prog="health-fn",
        description="Run a health query through the function-calling model.",
    )
    parser.add_argument(
        "query",
        nargs="?",
        help="Natural-language health query. Reads from stdin if omitted.",
    )
    parser.add_argument(
        "--pretty",
        action="store_true",
        default=True,
        help="Pretty-print JSON output (default: on).",
    )
    parser.add_argument(
        "--repo-id",
        default="ramgovindv/health_function_call_llama3.2_3b_gguf",
        help="Hugging Face repo ID.",
    )
    parser.add_argument(
        "--filename",
        default="Llama-3.2-3B-Instruct.Q4_K_M.gguf",
        help="GGUF filename inside the repo.",
    )
    parser.add_argument(
        "--n-ctx", type=int, default=2048, help="Context window size."
    )
    parser.add_argument(
        "--n-threads", type=int, default=4, help="Number of CPU threads."
    )

    args = parser.parse_args()

    query = args.query or sys.stdin.read().strip()
    if not query:
        parser.error("Provide a query as an argument or via stdin.")

    lm = HealthFunctionLM(
        repo_id=args.repo_id,
        filename=args.filename,
        n_ctx=args.n_ctx,
        n_threads=args.n_threads,
    )

    result = lm.query(query)
    indent = 2 if args.pretty else None
    print(json.dumps(result, indent=indent))


if __name__ == "__main__":
    main()