# SPDX-FileCopyrightText: 2026 Alexander Bates <alex@bates64.com>
#
# SPDX-License-Identifier: 0BSD

# Writes the .DS_Store that lays out the disk image's Finder window: its
# size, background, and where the app and the Applications shortcut sit,
# matching the dmg section of electron-builder.yml.
#
#   python3 dmg-layout.py OUT VOLUME_NAME APP_NAME

import datetime
import sys

import mac_alias
from ds_store import DSStore
from mac_alias import ALIAS_KIND_FILE, Alias, TargetInfo, VolumeInfo

out, volume, app = sys.argv[1:4]
now = datetime.datetime.now(datetime.timezone.utc)

# Finder finds the background through an alias to it. The catalog IDs here
# are the first an HFS+ volume hands out, and when they don't match, Finder
# falls back to the alias's paths.
background = Alias(
    volume=VolumeInfo(
        name=volume,
        creation_date=now,
        fs_type=b"H+",
        disk_type=mac_alias.ALIAS_EJECTABLE_DISK,
        attribute_flags=0,
        fs_id=b"\0\0",
        posix_path=f"/Volumes/{volume}",
    ),
    target=TargetInfo(
        kind=ALIAS_KIND_FILE,
        filename="background.tiff",
        folder_cnid=16,
        cnid=17,
        creation_date=now,
        creator_code=b"\0\0\0\0",
        type_code=b"\0\0\0\0",
        folder_name=".background",
        cnid_path=[16],
        carbon_path=f"{volume}:.background:\0background.tiff",
        posix_path="/.background/background.tiff",
    ),
)

with DSStore.open(out, "w+") as d:
    d["."]["bwsp"] = {
        "WindowBounds": "{{100, 100}, {540, 380}}",
        "ShowStatusBar": False,
        "ShowToolbar": False,
        "ShowPathbar": False,
        "ShowSidebar": False,
        "ShowTabView": False,
        "ContainerShowSidebar": False,
        "PreviewPaneVisibility": False,
        "SidebarWidth": 180,
    }
    d["."]["icvp"] = {
        "viewOptionsVersion": 1,
        "backgroundType": 2,
        "backgroundImageAlias": background.to_bytes(),
        "backgroundColorRed": 1.0,
        "backgroundColorGreen": 1.0,
        "backgroundColorBlue": 1.0,
        "arrangeBy": "none",
        "iconSize": 80.0,
        "textSize": 12.0,
        "labelOnBottom": True,
        "showIconPreview": True,
        "showItemInfo": False,
        "gridSpacing": 100.0,
        "gridOffsetX": 0.0,
        "gridOffsetY": 0.0,
        "scrollPositionX": 0.0,
        "scrollPositionY": 0.0,
    }
    d["."]["vSrn"] = ("long", 1)
    d[app]["Iloc"] = (130, 220)
    d["Applications"]["Iloc"] = (410, 220)
    d[".background"]["Iloc"] = (900, 900)