#!/usr/bin/env python3
"""
Illuscape uninstaller — cross-platform (Linux, Windows, macOS).

Usage:
    python3 uninstall.py
    ./uninstall.sh          (Linux / macOS)
"""
from __future__ import annotations

import os
import platform
import shutil
import subprocess
import sys
from pathlib import Path

SCRIPT_DIR = Path(__file__).parent
sys.path.insert(0, str(SCRIPT_DIR / "scripts"))

from detect_platform import detect_config  # noqa: E402

ICON_SIZES = (16, 32, 48, 64, 128, 256, 512)

# All files installed by install.py, keyed by subdirectory
_INSTALLED_FILES: dict[str, list[str]] = {
    "keys": [
        "illustrator-cc.xml",
        "illustrator-cs6.xml",
    ],
    "palettes": [
        "Illustrator-Defaults.gpl",
        "Illustrator-Grays.gpl",
        "Illustrator-Earth.gpl",
    ],
    "templates": [
        "Letter.svg",
        "A4.svg",
        "Web-1920x1080.svg",
        "Web-1280x720.svg",
        "Print-CMYK-Letter.svg",
        "Print-CMYK-A4.svg",
    ],
    "symbols": [
        "illuscape-common.svg",
    ],
    "splashscreens": [
        "illuscape-splash.png",
    ],
}


# ── Backup discovery ──────────────────────────────────────────────────────────

def find_backup(config_path: Path) -> Path | None:
    """Return the most recent illuscape backup directory, or None."""
    backups = sorted(config_path.parent.glob(config_path.name + ".bak-illuscape-*"))
    return backups[-1] if backups else None


# ── Restore ───────────────────────────────────────────────────────────────────

def restore_prefs(backup: Path, config_path: Path) -> None:
    """Copy preferences.xml back from the backup directory."""
    src = backup / "preferences.xml"
    dst = config_path / "preferences.xml"
    if src.exists():
        shutil.copy2(src, dst)
        print(f"→ preferences.xml restored from: {backup}")
    else:
        print("⚠ No preferences.xml in backup — skipping restore")


# ── File removal ──────────────────────────────────────────────────────────────

def remove_files(config_path: Path) -> None:
    """Delete all files that install.py placed in the Inkscape config dir."""
    for subdir, names in _INSTALLED_FILES.items():
        for name in names:
            (config_path / subdir / name).unlink(missing_ok=True)
    (config_path / "illuscape.ico").unlink(missing_ok=True)
    print("→ Illuscape config files removed")


# ── Desktop cleanup ───────────────────────────────────────────────────────────

def remove_desktop(install_method: str) -> None:
    """Remove the desktop launcher / Start Menu shortcut for the current platform."""
    system = platform.system()
    if system == "Linux" and install_method == "native":
        _remove_linux_desktop()
    elif system == "Windows":
        _remove_windows_desktop()


def _remove_linux_desktop() -> None:
    lnk = Path.home() / ".local/share/applications/org.inkscape.Inkscape.desktop"
    lnk.unlink(missing_ok=True)
    for size in ICON_SIZES:
        icon = (
            Path.home()
            / f".local/share/icons/hicolor/{size}x{size}/apps/illuscape.png"
        )
        icon.unlink(missing_ok=True)
    app_dir = Path.home() / ".local/share/applications"
    subprocess.run(["update-desktop-database", str(app_dir)], capture_output=True)
    print("→ Desktop launcher removed")


def _remove_windows_desktop() -> None:
    lnk = (
        Path(os.environ.get("APPDATA", ""))
        / "Microsoft/Windows/Start Menu/Programs/Illuscape.lnk"
    )
    lnk.unlink(missing_ok=True)
    print("→ Start Menu shortcut removed")


# ── Main ──────────────────────────────────────────────────────────────────────

def main() -> None:
    print("╔══════════════════════════════╗")
    print("║      Illuscape Uninstaller   ║")
    print("╚══════════════════════════════╝")
    print()

    config_path, install_method = detect_config()
    print(f"→ Inkscape config: {config_path} ({install_method})")

    backup = find_backup(config_path)
    if backup is None:
        print(f"⚠ No Illuscape backup found at {config_path}.bak-illuscape-*")
        print("  Cannot restore original preferences.xml automatically.")
        print("  Removing only Illuscape-installed files.")
    else:
        restore_prefs(backup, config_path)

    remove_files(config_path)
    remove_desktop(install_method)

    print()
    print("✓ Illuscape uninstalled.")
    print()
    print("  Note: Your Inkscape preferences may have changed since Illuscape was")
    print("  installed. If anything looks wrong, review:")
    print(f"  {config_path}/preferences.xml")
    print()


if __name__ == "__main__":
    main()