"""Tests de l'export PDF (planche d'impression terrain)."""

import pytest


def test_layout_landscape_a4_dimensions():
    from lidar_pipeline.export_pdf import layout
    lay = layout("A4", "paysage", 2000)
    assert (lay.page_w, lay.page_h) == (297.0, 210.0) and lay.dpi == 300
    assert lay.map_w > 150 and lay.map_h > 150
    assert lay.panel_x >= lay.map_x + lay.map_w          # bandeau à droite
    assert lay.map_x + lay.map_w <= lay.page_w and lay.map_y + lay.map_h <= lay.page_h


def test_layout_portrait_a3_panel_below():
    from lidar_pipeline.export_pdf import layout
    lay = layout("A3", "portrait", 5000)
    assert (lay.page_w, lay.page_h) == (297.0, 420.0) and lay.dpi == 250
    assert lay.panel_y + lay.panel_h <= lay.map_y        # bandeau en bas


@pytest.mark.parametrize("args", [("A5", "paysage", 2000), ("A4", "biais", 2000),
                                  ("A4", "paysage", 1234)])
def test_layout_rejects_invalid(args):
    from lidar_pipeline.export_pdf import layout
    with pytest.raises(ValueError):
        layout(*args)


def test_map_bbox_matches_paper_times_scale():
    from lidar_pipeline.export_pdf import layout, map_bbox
    lay = layout("A4", "paysage", 2000)
    b = map_bbox(652500.0, 6861500.0, lay)
    assert abs((b[2] - b[0]) - lay.map_w / 1000 * 2000) < 1e-6
    assert abs((b[3] - b[1]) - lay.map_h / 1000 * 2000) < 1e-6
    assert abs((b[0] + b[2]) / 2 - 652500.0) < 1e-6


def test_pixel_size_and_grid_step():
    from lidar_pipeline.export_pdf import grid_step, layout, pixel_size
    assert pixel_size(layout("A4", "paysage", 1000)) == 0.2          # plafonné au natif
    assert abs(pixel_size(layout("A3", "paysage", 10000)) - 10000 * 0.0254 / 250) < 1e-9
    assert [grid_step(s) for s in (1000, 2000, 5000, 10000)] == [100, 100, 500, 1000]


def test_center_l93_rejects_non_finite():
    from lidar_pipeline.export_pdf import center_l93
    with pytest.raises(ValueError):
        center_l93(float("nan"), 2.0)


def test_frame_roundtrip():
    from lidar_pipeline.export_pdf import center_l93, frame
    lat, lon = 48.85, 2.35
    f = frame(lat, lon, "A4", "paysage", 2000)
    cx, cy = center_l93(lat, lon)
    assert abs(f["cx"] - cx) < 1e-6 and abs(f["cy"] - cy) < 1e-6
    assert len(f["corners"]) == 4
    nw, ne, se, sw = f["corners"]
    assert nw[0] > sw[0] and ne[1] > nw[1]               # [lat, lon] : nord en haut, est à droite
    assert f["width_m"] > f["height_m"] > 0


def test_export_modules_import_without_numpy():
    import subprocess, sys
    code = ("import sys; sys.modules['numpy'] = None; "
            "import lidar_pipeline.export_pdf, lidar_pipeline.tiles; print('ok')")
    r = subprocess.run([sys.executable, "-c", code], capture_output=True, text=True)
    assert r.returncode == 0, r.stderr