post_install() {
    local config_dir="$HOME/.config/hamr"
    local state_dir="$HOME/.local/state/quickshell/hamr"
    mkdir -p "$config_dir"
    mkdir -p "$state_dir"

    if [ ! -f "$config_dir/colors.json" ]; then
        cp /etc/xdg/quickshell/hamr/defaults/colors.json "$config_dir/colors.json"
    fi

    echo ""
    echo "==> Hamr has been installed to /etc/xdg/quickshell/hamr"
    echo ""
    echo "==> To start hamr, run:"
    echo "      hamr"
    echo ""
    echo "==> User config and plugins: ~/.config/hamr/"
    echo "==> Persistent state: ~/.local/state/quickshell/hamr/"
    echo ""
    echo "==> Color theme:"
    echo "      Edit ~/.config/hamr/colors.json directly, or"
    echo "      configure matugen/wallust to output to this path, or"
    echo "      symlink to your existing colors (e.g. for end-4/dots-hyprland):"
    echo "        ln -sf ~/.local/state/quickshell/user/generated/colors.json ~/.config/hamr/colors.json"
    echo ""
    echo "==> For Hyprland, add to ~/.config/hypr/hyprland.conf:"
    echo "      exec-once = hamr"
    echo "      bind = Ctrl, Space, exec, hamr toggle"
    echo ""
    echo "==> For Niri, enable the systemd service and add keybind:"
    echo "      systemctl --user enable hamr.service"
    echo "      systemctl --user add-wants niri.service hamr.service"
    echo "      systemctl --user start hamr.service"
    echo ""
    echo "      # Add to ~/.config/niri/config.kdl binds section:"
    echo "      Ctrl+Space { spawn \"hamr\" \"toggle\"; }"
    echo ""
    echo "==> Troubleshooting:"
    echo "      View logs: journalctl --user -u hamr -f"
    echo "      Qt mismatch crash? Rebuild: paru -S quickshell --rebuild"
    echo ""
}

post_upgrade() {
    local config_file="$HOME/.config/hamr/hamr.json"

    # Migrate: remove old prefix config if it matches system defaults
    if [ -f "$config_file" ]; then
        local default_prefix='{"action":"/","app":">","clipboard":";","emojis":":","file":"~","math":"=","shellCommand":"$","shellHistory":"!","webSearch":"?"}'
        local current_prefix
        current_prefix=$(jq -c '.search.prefix // empty' "$config_file" 2>/dev/null)

        if [ -n "$current_prefix" ]; then
            # Normalize both for comparison (sort keys)
            local current_sorted
            local default_sorted
            current_sorted=$(echo "$current_prefix" | jq -cS '.' 2>/dev/null)
            default_sorted=$(echo "$default_prefix" | jq -cS '.' 2>/dev/null)

            if [ "$current_sorted" = "$default_sorted" ]; then
                # Remove the old prefix config since it's the default
                jq 'del(.search.prefix)' "$config_file" >"$config_file.tmp" && mv "$config_file.tmp" "$config_file"
                echo "==> Migrated: removed default prefix config (now using actionBarHints)"
            fi
        fi
    fi

    echo ""
    echo "==> Hamr has been upgraded."
    echo "==> Restart quickshell to apply changes."
    echo ""
    echo "==> If hamr crashes after a Qt update, rebuild quickshell:"
    echo "      paru -S quickshell --rebuild"
    echo ""
}

post_remove() {
    # Disable systemd service if enabled
    systemctl --user disable hamr.service 2>/dev/null || true

    echo ""
    echo "==> User data has been preserved. Remove manually if no longer needed:"
    echo "      rm -rf ~/.config/hamr"
    echo "      rm -rf ~/.local/state/quickshell/hamr"
    echo ""
}