"""
PoC: produce a minimal valid S-57 .000 for the Wabasso test area and verify it
opens cleanly with fiona (i.e., GDAL's S-57 driver).

Expected result: fiona.listlayers() shows M_COVR + BOYLAT (and no warnings about
broken bounds), and bounds match the envelope we encoded.
"""
from pathlib import Path
import sys

sys.path.insert(0, str(Path(__file__).parent))
from s57_writer import (
    S57Cell, OBJL_M_COVR, OBJL_BOYLAT,
    ATTL_CATCOV, ATTL_CATLAM,
)

# Wabasso area envelope (lon, lat):
W, S, E, N = -80.4588, 27.7519, -80.4574, 27.7609

OUTPUT = Path(__file__).parent / "test_wabasso.000"

cell = S57Cell(
    dsnm="TESTPOC.000",
    edition=1,
    intu=5,             # Harbour
    scale=10000,
    agen=999,
    comt="QGISS57Converter PoC",
    issue_date="20260428",
)

# 1) Mandatory M_COVR feature: rectangular envelope, CATCOV=1 (data covered)
cell.add_area_feature(
    objl=OBJL_M_COVR,
    ring=[(W, S), (E, S), (E, N), (W, N), (W, S)],
    attrs=[(ATTL_CATCOV, "1")],   # CATCOV=1 (coverage present)
)

# 2) One BOYLAT (lateral buoy, port hand IALA-B = CATLAM=1) at the centre
cx = (W + E) / 2
cy = (S + N) / 2
cell.add_point_feature(
    objl=OBJL_BOYLAT,
    lon=cx, lat=cy,
    attrs=[(ATTL_CATLAM, "1")],   # CATLAM=1 (port-hand lateral mark)
)

cell.write(OUTPUT)
print(f"Wrote {OUTPUT} ({OUTPUT.stat().st_size} bytes)")

# ── Verify with fiona ────────────────────────────────────────────────────────
print()
print("Verifying with fiona...")
try:
    import fiona
    layers = fiona.listlayers(str(OUTPUT))
    print(f"  fiona.listlayers: {layers}")
    for L in layers:
        try:
            with fiona.open(str(OUTPUT), layer=L) as src:
                print(f"    {L:10s}  bounds={src.bounds}  features={len(src)}")
        except Exception as e:
            print(f"    {L}: open ERROR: {e}")
except Exception as e:
    print(f"  fiona import or listlayers failed: {e}")