"""Command-line entry point installed by ``pyproject.toml``.

The DEFAULT mode is single-beam measurement: the ROI(s) already isolate one
beam each, the cloud is cropped and measured directly (no registration, no
dual-beam tracking). Provide ``--roi`` for one beam, or ``--left-roi`` and
``--right-roi`` to measure both in one invocation.

The legacy dual-beam pipeline (registration + left/right tracking on a
car-bottom slab) is still available via ``--mode dual``.
"""

from __future__ import annotations

import argparse


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        description="Measure underframe longitudinal beam deflection from a point cloud.",
    )
    parser.add_argument(
        "--mode",
        default="single",
        choices=["single", "dual"],
        help="'single' (default): ROI isolates one beam, measure directly. "
             "'dual': legacy car-bottom slab with left+right tracking + registration.",
    )
    parser.add_argument(
        "--input-cloud",
        required=True,
        help="Path to input scan point cloud (.ply or .xyz). Large binary PLYs "
             "are stream-cropped by the ROI in single mode.",
    )
    parser.add_argument(
        "--out-dir",
        required=True,
        help="Output directory for report.json/.xlsx, CSV, and PNG.",
    )
    # --- single mode ---
    parser.add_argument(
        "--roi",
        default=None,
        help="Single mode: ROI JSON isolating ONE beam (native frame "
             "x=length, y=height, z=width).",
    )
    parser.add_argument(
        "--left-roi",
        default=None,
        help="Single mode: ROI JSON for the left beam (use with --right-roi).",
    )
    parser.add_argument(
        "--right-roi",
        default=None,
        help="Single mode: ROI JSON for the right beam (use with --left-roi).",
    )
    parser.add_argument(
        "--side",
        default=None,
        help="Single mode label for --roi (left/right); inferred from the ROI's "
             "lateral z (x-forward: z>0 left, z<0 right) if omitted.",
    )
    parser.add_argument(
        "--tolerance",
        type=float,
        default=None,
        help="Single mode --roi: pass/fail tolerance in mm. Default by side "
             "(left 7, right 12).",
    )
    parser.add_argument(
        "--left-tolerance",
        type=float,
        default=None,
        help="Both-beam mode: left-beam tolerance in mm (default 7).",
    )
    parser.add_argument(
        "--right-tolerance",
        type=float,
        default=None,
        help="Both-beam mode: right-beam tolerance in mm (default 12).",
    )
    parser.add_argument(
        "--enable-registration",
        action="store_true",
        help="Single mode: rigidly align the cloud to --cad before measuring. "
             "Default OFF (cloud assumed already registered). Requires --cad as a "
             "sampled .ply/.stl/.obj (.stp must be converted first).",
    )
    # --- shared ---
    parser.add_argument(
        "--config",
        default=None,
        help="Optional JSON config override file.",
    )
    parser.add_argument(
        "--skip-excel",
        action="store_true",
        help="Skip writing the .xlsx report.",
    )
    parser.add_argument(
        "--skip-plot",
        action="store_true",
        help="Single mode: skip the PNG plot.",
    )
    # --- dual (legacy) mode ---
    parser.add_argument(
        "--cad",
        default=None,
        help="Dual mode: CAD reference (.ply/.xyz/.stl/.obj) for registration.",
    )
    parser.add_argument(
        "--profile",
        default="auto",
        choices=["auto", "M", "TC", "TP", "custom"],
        help="Dual mode: profile for scale-related tuning.",
    )
    parser.add_argument(
        "--skip-registration",
        action="store_true",
        help="Dual mode: bypass ICP even when --cad is supplied.",
    )
    parser.add_argument(
        "--no-bilateral",
        action="store_true",
        help="Dual mode: disable bilateral denoising.",
    )
    parser.add_argument(
        "--input-axis",
        default="y_up",
        choices=["z_up", "y_up"],
        help="Dual mode: height axis convention (default y_up).",
    )
    return parser.parse_args()


def _load_config(path):
    if not path:
        return None
    import json
    from pathlib import Path
    return json.loads(Path(path).read_text(encoding="utf-8"))


def main() -> None:
    args = parse_args()

    if args.mode == "single":
        from .single_beam_pipeline import run_single_beam_pipeline, run_both_beams
        config = _load_config(args.config)
        if args.left_roi and args.right_roi:
            run_both_beams(
                input_cloud=args.input_cloud,
                left_roi=args.left_roi,
                right_roi=args.right_roi,
                out_dir=args.out_dir,
                config=config,
                cad_path=args.cad,
                enable_registration=args.enable_registration,
                left_tolerance_mm=args.left_tolerance,
                right_tolerance_mm=args.right_tolerance,
                skip_excel=args.skip_excel,
                skip_plot=args.skip_plot,
            )
        elif args.roi:
            run_single_beam_pipeline(
                input_cloud=args.input_cloud,
                roi_path=args.roi,
                out_dir=args.out_dir,
                side=args.side,
                tolerance_mm=args.tolerance,
                config=config,
                cad_path=args.cad,
                enable_registration=args.enable_registration,
                skip_excel=args.skip_excel,
                skip_plot=args.skip_plot,
            )
        else:
            raise SystemExit(
                "single mode requires --roi (one beam) or both --left-roi and --right-roi."
            )
        return

    # dual (legacy) mode
    from .pipeline import run_measurement_pipeline
    run_measurement_pipeline(
        input_cloud=args.input_cloud,
        out_dir=args.out_dir,
        config_path=args.config,
        profile=args.profile,
        cad_path=args.cad,
        roi_path=args.roi,
        skip_registration=args.skip_registration,
        enable_bilateral=not args.no_bilateral,
        skip_excel=args.skip_excel,
        input_axis=args.input_axis,
    )


if __name__ == "__main__":
    main()