Songs View Fix for Music.app

# --- 準備: プロセス停止 ---
killall Music 2>/dev/null || true
killall cfprefsd 2>/dev/null || true

# --- libID を自動検出 ---
local libid=""
local p
for p in \
    "$HOME/Library/Preferences/com.apple.Music.plist" \
    "$HOME/Library/Containers/com.apple.Music/Data/Library/Preferences/com.apple.Music.plist"
do
    if [ -f "$p" ]; then
        libid=$(plutil -p "$p" 2>/dev/null | grep -Eo 'PPr4:LIB:[0-9a-f]+' | awk -F: '{print tolower($3)}' | head -1)
        [ -n "$libid" ] && break
    fi
done

if [ -z "$libid" ]; then
    # .musiclibrary の Preferences.plist から拾う（ホーム＆外部ボリューム）
    while IFS= read -r libpkg; do
        [ -n "$libpkg" ] || continue
        local pref="$libpkg/Preferences.plist"
        if [ -f "$pref" ]; then
            libid=$(plutil -p "$pref" 2>/dev/null | awk -F'"' '/Library Persistent ID/ {print tolower($4)}' | head -1)
            [ -n "$libid" ] && break
        fi
    done < <(mdfind -name "Music Library.musiclibrary" -onlyin "$HOME/Music" 2>/dev/null; \
                     mdfind -name "Music Library.musiclibrary" -onlyin "/Volumes" 2>/dev/null)
fi

if [ -z "$libid" ]; then
    echo "ERROR: libID を自動検出できませんでした。Music を一度起動→終了するか、手動でキーが1件作成されていることを確認してください。"
    return 1
fi
echo "libID=$libid"

# --- 総数取得 ---
local COUNT
COUNT=$(osascript -e 'tell application "Music" to launch' \
                                    -e 'tell application "Music" to count of user playlists')
if ! echo "$COUNT" | grep -qE '^[0-9]+$'; then
    echo "ERROR: プレイリスト件数を取得できませんでした。Automation 権限（Terminal→Music）をご確認ください。"
    return 2
fi
echo "playlists=$COUNT"

# --- 1件ずつ PID を取り vMF=4 を設定 ---
local i PID KEY
for i in $(seq 1 "$COUNT"); do
    PID=$(osascript -e 'tell application "Music" to try
        return persistent ID of item '"$i"' of user playlists
    on error
        return ""
    end try' | tr '[:upper:]' '[:lower:]')

    if echo "$PID" | grep -qE '^[0-9a-f]{16}$'; then
        KEY="PPr4:LIB:${libid}:${PID}"
        defaults write com.apple.Music "$KEY" -dict-add viewModeForPlaylist -int 4
        printf 'OK\t%02d\t%s\n' "$i" "$PID"
    else
        printf 'SKIP\t%02d\n' "$i"
    fi
done

# --- 反映＆サマリ ---
killall cfprefsd 2>/dev/null || true

plutil -p "$HOME/Library/Preferences/com.apple.Music.plist" \
    | grep -Eo 'PPr4:LIB:[0-9a-f]+:[0-9a-f]{16}' | wc -l
plutil -p "$HOME/Library/Preferences/com.apple.Music.plist" \
    | grep -E '"viewModeForPlaylist" => 4' | wc -l