"""
In-place fix for an Anchorage_Station.blend built before 2026-10-13: moves the preview sea plane down so that it
no longer cuts through Relay Control's sunken window ring (the ring reaches 1.70 m below the main floor; the sea
was drawn at -1.2 m). Nothing else in the file is touched.

    blender -b --factory-startup Anchorage_Station.blend --python build/fix_sea_level.py [-- <sea z>]

Back the file up first. The level is also what build_anchorage.py uses from now on (SEA_LEVEL_Z).
"""
import sys

import bpy
from mathutils import Vector

sys.dont_write_bytecode = True
ARGS = sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else []
WANT = float(ARGS[0]) if ARGS else -1.9

sea = bpy.data.objects.get("CONTEXT_sea (preview only)")
if sea is None:
    raise RuntimeError("no sea plane in this file")
station = bpy.data.collections["ANCHORAGE STATION"]
lowest = 1e9
lowest_name = ""
for ob in station.all_objects:
    if ob.type != "MESH" or ob.get("ue_decal_material"):
        continue
    z = min((ob.matrix_world @ Vector(c)).z for c in ob.bound_box)
    if z < lowest:
        lowest, lowest_name = z, ob.name
before = sea.location.z
level = min(WANT, lowest - 0.15)
sea.location.z = level
bpy.context.preferences.filepaths.save_version = 0
bpy.ops.wm.save_mainfile(compress=True)
print("[sea] lowest station geometry %.2f m (%s); sea plane moved from %.2f to %.2f m; saved %s"
      % (lowest, lowest_name, before, level, bpy.data.filepath))