# Export the two in-scope north-side background buildings from the OSM blockout.
#
#   blender -b --factory-startup Art/blender/blockout/blockout-2026-11-06.blend \
#       --python Tools/export_north_buildings.py -- --out /tmp/gigline/north
#
# The blockout is already in the shared project frame (metres, X east / Y north /
# Z up, origin Hollywood x Highland), so exporting each object at its own world
# position preserves the offset from the hero facade. The site export preset
# (`ue_metric_v1`) is reused verbatim so the metre->centimetre mapping matches.

import argparse
import os
import sys

import bpy
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import fbx_export_preset as fbx_preset  # noqa: E402


BUILDINGS = ("TCL Chinese Theatre", "Madame Tussaud's")


def main():
    argv = sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else []
    ap = argparse.ArgumentParser()
    ap.add_argument("--out", default="/tmp/gigline/north")
    args = ap.parse_args(argv)
    os.makedirs(args.out, exist_ok=True)

    print(f"[north] scene objects: {len(bpy.data.objects)}")
    for name in BUILDINGS:
        obj = bpy.data.objects.get(name)
        if obj is None or obj.type != "MESH":
            print(f"[north] MISSING {name}")
            continue
        bpy.ops.object.select_all(action="DESELECT")
        obj.select_set(True)
        bpy.context.view_layer.objects.active = obj
        mesh = obj.data
        if not mesh.materials:
            mat = bpy.data.materials.new(f"M_{name.replace(' ', '_')}")
            mat.diffuse_color = (0.75, 0.72, 0.68, 1.0)
            mat.use_nodes = False
            mesh.materials.append(mat)

        # No copy and no Y mirror: the FBX preset already lands Blender +Y
        # (north) on Unreal -Y, and UE north is -Y here (north sidewalk
        # Y -1912..-1053). The old mirror put both buildings on the south side.
        new_obj = obj
        new_mesh = mesh
        bpy.ops.object.select_all(action="DESELECT")
        new_obj.select_set(True)
        bpy.context.view_layer.objects.active = new_obj

        path = os.path.join(args.out, name.replace(" ", "_").replace("'", "") + ".fbx")
        fbx_preset.export_static(path, selection=True)
        world = new_obj.matrix_world
        zs = [(world @ v.co).z for v in new_mesh.vertices]
        print(f"[north] {name:22} verts {len(new_mesh.vertices):5}  z {min(zs):+.2f}..{max(zs):+.2f} m "
              f"-> {path}")
        bpy.data.objects.remove(new_obj, do_unlink=True)

    print(f"[north] done")


main()