#!/usr/bin/env python3
"""
Auto Clip - single CLI wrapper

Purpose:
  - Provide one stable entrypoint for the repo
  - Route commands to V_1 / V_2 / V_3 scripts
  - Keep it simple and Git-friendly (no packaging required)

Usage:
  python autoclip.py v3 --tracks-dir ./tracks --select all --teaser 60 --bars 2 --harmonic
  python autoclip.py v2 --tracks-dir ./tracks --select auto --auto-n 8 --teaser 75 --bars 4
  python autoclip.py list

Notes:
  - This wrapper assumes your repo structure:
      V_1/...
      V_2/dj_teaser_v2.py
      V_3/dj_teaser_v3.py
  - It forwards all remaining arguments to the selected version script.
"""

import argparse
import subprocess
import sys
from pathlib import Path


def repo_root() -> Path:
    return Path(__file__).resolve().parent


def existing_script(version: str) -> Path:
    root = repo_root()
    v = version.lower()

    # Adjust these filenames if your scripts differ.
    candidates = {
        "v1": [root / "V_1" / "dj_teaser_v1.py", root / "V_1" / "dj_teaser.py"],
        "v2": [root / "V_2" / "dj_teaser_v2.py", root / "V_2" / "dj_teaser.py"],
        "v3": [root / "V_3" / "dj_teaser_v3.py", root / "V_3" / "dj_teaser.py"],
    }

    if v not in candidates:
        raise SystemExit(f"Unknown version '{version}'. Use: v1 | v2 | v3")

    for p in candidates[v]:
        if p.exists():
            return p

    raise SystemExit(
        f"Could not find a script for {version}.\n"
        f"Looked for:\n- " + "\n- ".join(str(p) for p in candidates[v])
    )


def list_versions():
    root = repo_root()
    print("Auto Clip versions available:")
    for v in ["V_1", "V_2", "V_3"]:
        p = root / v
        if p.exists():
            print(f"  - {v}/")
    print("\nTip: run `python autoclip.py v3 --help` (forwards to the version script).")


def main():
    parser = argparse.ArgumentParser(
        prog="autoclip",
        description="Auto Clip - single CLI wrapper (routes to V_1 / V_2 / V_3).",
    )
    parser.add_argument("command", nargs="?", default="help", help="v1 | v2 | v3 | list | help")
    parser.add_argument("args", nargs=argparse.REMAINDER, help="Arguments forwarded to the version script")

    ns = parser.parse_args()
    cmd = ns.command.lower()

    if cmd in {"help", "-h", "--help"}:
        parser.print_help()
        print("\nExamples:")
        print("  python autoclip.py list")
        print("  python autoclip.py v3 --tracks-dir ./tracks --select all --teaser 60 --bars 2 --harmonic")
        return

    if cmd == "list":
        list_versions()
        return

    if cmd in {"v1", "v2", "v3"}:
        script = existing_script(cmd)
        full = [sys.executable, str(script)] + ns.args
        raise SystemExit(subprocess.call(full))

    raise SystemExit(f"Unknown command '{ns.command}'. Use: v1 | v2 | v3 | list | help")


if __name__ == "__main__":
    main()