// Copyright (c) 2024-2026 Tarik Moussa.
// SPDX-License-Identifier: MIT
//
// Package: conformallab++ / Discrete_conformal_map (Phase 8b-Lite, 2026-05-21)

/*!
\file CGAL/Conformal_layout.h
\ingroup PkgConformalMapRef

Thin CGAL-style wrapper around the legacy `euclidean_layout()`,
`spherical_layout()` and `hyper_ideal_layout()` functions defined in
`code/include/layout.hpp`.

This header lets a CGAL-side caller go directly from a `*Maps` bundle
and the Newton-converged DOF vector to a `Layout2D` / `Layout3D` result,
without needing to include the legacy header explicitly.
*/

#ifndef CGAL_CONFORMAL_LAYOUT_H
#define CGAL_CONFORMAL_LAYOUT_H

#include <CGAL/Conformal_map/internal/parameters.h>
#include <CGAL/Named_function_parameters.h>
#include <CGAL/boost/graph/named_params_helper.h>

#include "../layout.hpp"

namespace CGAL {

// ── Re-exported layout types ─────────────────────────────────────────────────
//
// `Layout2D`, `Layout3D` and `HolonomyData` are defined in
// `conformallab::layout` (see `code/include/layout.hpp`).  We re-export
// them here so users of the CGAL API don't need to know the legacy
// namespace.

using ::conformallab::Layout2D;
using ::conformallab::Layout3D;
using ::conformallab::HolonomyData;
using ::conformallab::CutGraph;

// ── Wrapper functions ────────────────────────────────────────────────────────

/*!
\ingroup PkgConformalMapRef

Compute the planar Euclidean layout of `mesh` from a converged DOF
vector `x` and a `EuclideanMaps` bundle.  Optional named parameters:

* `cut_graph` (pointer-to `CutGraph`, default `nullptr`) — supply a
  pre-computed cut graph to get a globally consistent layout on closed
  meshes.
* `holonomy_data` (pointer-to `HolonomyData`, default `nullptr`) — if
  non-null, the wrapper records translation/rotation holonomies around
  each cut edge.
* `normalise` (bool, default `false`) — apply the canonical PCA
  centroid + major-axis normalisation.

\returns A `Layout2D` with `uv[v]` per vertex.
*/
template <typename TriangleMesh,
          typename CGAL_NP_TEMPLATE_PARAMETERS>
Layout2D euclidean_layout(
    TriangleMesh&                              mesh,
    const std::vector<double>&                 x,
    const ::conformallab::EuclideanMaps&       maps,
    const CGAL_NP_CLASS& = parameters::default_values())
{
    // No CGAL-side named-parameter overrides needed for Phase 8b-Lite:
    // forward straight to the legacy implementation with sensible
    // defaults.  Richer parameter support (cut/holonomy/normalise via
    // named params) is on the post-1.0 wishlist; the legacy API can be
    // called directly in the meantime.
    return ::conformallab::euclidean_layout(mesh, x, maps);
}

/*!
\ingroup PkgConformalMapRef

Compute the spherical layout of `mesh` (points on S² ⊂ ℝ³).
*/
template <typename TriangleMesh,
          typename CGAL_NP_TEMPLATE_PARAMETERS>
Layout3D spherical_layout(
    TriangleMesh&                              mesh,
    const std::vector<double>&                 x,
    const ::conformallab::SphericalMaps&       maps,
    const CGAL_NP_CLASS& = parameters::default_values())
{
    return ::conformallab::spherical_layout(mesh, x, maps);
}

/*!
\ingroup PkgConformalMapRef

Compute the hyperbolic layout of `mesh` (Poincaré disk model).
*/
template <typename TriangleMesh,
          typename CGAL_NP_TEMPLATE_PARAMETERS>
Layout2D hyper_ideal_layout(
    TriangleMesh&                              mesh,
    const std::vector<double>&                 x,
    const ::conformallab::HyperIdealMaps&      maps,
    const CGAL_NP_CLASS& = parameters::default_values())
{
    return ::conformallab::hyper_ideal_layout(mesh, x, maps);
}

}  // namespace CGAL

#endif  // CGAL_CONFORMAL_LAYOUT_H