sync.sh

#!/usr/bin/env bash
# Taiwan.md 統一同步腳本：knowledge/ SSOT → src/content/ 投影層
#
# 設計：
#   - SSOT: enabled lang codes from src/config/languages.mjs
#   - zh-TW (default): knowledge/{Category}/ → src/content/zh-TW/{category}/
#   - 其他 lang:       knowledge/{lang}/{Category}/ → src/content/{lang}/{category}/
#   - Resources:       knowledge/resources/ (zh-TW) + knowledge/{lang}/resources/ → src/content/{lang}/resources/
#   - Root files:      knowledge/{lang}/*.md (root level) → src/content/{lang}/*.md
#   - 冪等：先 rm -rf 所有 enabled lang dirs 再重建
#
# 用法：bash scripts/core/sync.sh
#
# 2026-05-12 admiring-montalcini-post-finale refactor:
#   - 從 217 行 5x repeat → 模組化 sync_lang() function
#   - 修補既有 bug:
#     (a) fr/es 加進 rm list（清 336 zombie articles）
#     (b) 各 lang 都跑 resources/ 同步（原本只跑 zh-TW + en）
#     (c) 各 lang 的 root-level .md 也搬（原本只搬 zh-TW _Home.md，
#         knowledge/en/{root.md} 等被略過 → 8 silent missing 根因）
#   - SSOT 驅動：active lang list 從 src/config/languages.mjs 讀取
#
# 對應：reports/sync-architecture-evolution-2026-05-12.md v2.0 Ship 1

set -euo pipefail

# ────────────────── 設定 ──────────────────
readonly REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null || pwd)"
cd "$REPO_ROOT"

# Categories（跟 knowledge/ 目錄結構對齊；新增分類時這裡 + knowledge/ 一起加）
readonly CATEGORIES=(
  About Art Culture Economy Food Geography History
  Lifestyle Music Nature People Politics Society Technology
)

# Enabled lang codes 從 SSOT 讀取
ENABLED_LANGS=$(node -e "
  import('./src/config/languages.mjs')
    .then(m => console.log(m.ENABLED_LANGUAGE_CODES.join(' ')))
    .catch(e => { console.error(e.message); process.exit(1); });
" 2>&1) || {
  echo "❌ 無法從 src/config/languages.mjs 讀取 ENABLED_LANGUAGE_CODES" >&2
  echo "   錯誤：$ENABLED_LANGS" >&2
  exit 2
}

if [ -z "$ENABLED_LANGS" ]; then
  echo "❌ ENABLED_LANGUAGE_CODES 為空" >&2
  exit 2
fi

# ────────────────── Header ──────────────────
echo "🚀 Taiwan.md sync — knowledge/ SSOT → src/content/ 投影層"
echo "═══════════════════════════════════════════════════════"
echo "  Enabled langs: $ENABLED_LANGS"
echo ""

# ────────────────── Phase 1: 清空 ──────────────────
echo "🧹 Phase 1: 清空 src/content/{lang}/ (冪等重建)..."
for lang in $ENABLED_LANGS; do
  if [ -d "src/content/$lang" ]; then
    rm -rf "src/content/$lang"
  fi
done
echo "  ✅ Cleaned: $ENABLED_LANGS"
echo ""

# ────────────────── Phase 2: 同步 sync_lang() ──────────────────
KNOWLEDGE_COUNT=$(find knowledge/ -name "*.md" | wc -l | tr -d ' ')
SYNCED_TOTAL=0

# sync_lang LANG_CODE — 把 knowledge/{lang}/ (或 zh-TW 的 knowledge/ root) 同步到 src/content/{lang}/
sync_lang() {
  local lang="$1"
  local src_root dst_root count=0

  # zh-TW 特例：source 在 knowledge/ root（不在 knowledge/zh-TW/）
  if [ "$lang" = "zh-TW" ]; then
    src_root="knowledge"
  else
    src_root="knowledge/$lang"
  fi
  dst_root="src/content/$lang"

  if [ ! -d "$src_root" ]; then
    echo "  ⚠️  $lang: SKIP (no $src_root/)"
    return
  fi

  # 逐檔 cp → 單次多檔 cp（2026-08-04 build-speed）：原寫法對 10k+ 檔各 spawn 一個
  # cp process，CI 上吃 26s、本機 dev 啟動 23s。批次化後每個目錄一個 process。
  # copy_md_batch SRC_DIR DST_DIR — 拷 SRC_DIR 頂層 *.md（不遞迴，同原語意），回傳檔數
  copy_md_batch() {
    local sdir="$1" ddir="$2"
    local batch=("$sdir"/*.md)
    # glob 無匹配時留下 literal pattern，跟原 [ ! -f ] 檢查同語意
    [ ! -f "${batch[0]}" ] && { echo 0; return; }
    mkdir -p "$ddir"
    cp "${batch[@]}" "$ddir/"
    echo "${#batch[@]}"
  }

  # 2a. Category subdirs (knowledge/{Cat}/*.md → src/content/{lang}/{cat}/*.md)
  for category in "${CATEGORIES[@]}"; do
    local src_dir="$src_root/$category"
    [ ! -d "$src_dir" ] && continue

    local cat_lower
    cat_lower=$(echo "$category" | tr '[:upper:]' '[:lower:]')
    mkdir -p "$dst_root/$cat_lower"  # 原語意：src category 目錄存在就建 dst（即使沒 md）
    count=$((count + $(copy_md_batch "$src_dir" "$dst_root/$cat_lower")))
  done

  # 2b. resources/ subdir (各 lang 都有，原本 bug：只跑 zh-TW + en)
  if [ -d "$src_root/resources" ]; then
    count=$((count + $(copy_md_batch "$src_root/resources" "$dst_root/resources")))
  fi

  # 2c. Root-level .md files (knowledge/{lang}/*.md → src/content/{lang}/*.md)
  # 原本 bug：只搬 knowledge/_Home.md，其他 lang root 的 .md 被略過 → silent missing
  count=$((count + $(copy_md_batch "$src_root" "$dst_root")))

  SYNCED_TOTAL=$((SYNCED_TOTAL + count))
  printf "  ✅ %-6s %4d files\n" "$lang" "$count"
}

echo "📁 Phase 2: 同步 (per lang)..."
for lang in $ENABLED_LANGS; do
  sync_lang "$lang"
done
echo ""

# ────────────────── Phase 3: Frontmatter 修復 (legacy) ──────────────────
# 注意：fix-all-frontmatter.py 只在缺 `title:` 時重建 frontmatter (99% 檔案 no-op)
# 留著是 legacy migration safeguard，未來 contributor 直丟到 src/content/ 不再可能（gitignore 後）
echo "🔧 Phase 3: Frontmatter 修復 (legacy fallback)..."
if [ -f "scripts/utils/fix-all-frontmatter.py" ]; then
  python3 scripts/utils/fix-all-frontmatter.py 2>&1 | tail -2
else
  echo "  ⚠️  scripts/utils/fix-all-frontmatter.py 不存在，跳過"
fi
echo ""

# ────────────────── Phase 4: 圖片健康檢查 ──────────────────
echo "🖼️  Phase 4: 圖片健康檢查..."
if [ -f "scripts/utils/check-images.mjs" ]; then
  node scripts/utils/check-images.mjs 2>&1 | tail -5 || echo "  ⚠️  圖片檢查回報警告（非致命）"
else
  echo "  ⚠️  scripts/utils/check-images.mjs 不存在，跳過"
fi
echo ""

# ────────────────── Footer ──────────────────
CONTENT_FINAL=$(find src/content/ -name "*.md" | wc -l | tr -d ' ')

echo "═══════════════════════════════════════════════════════"
echo "✨ Sync 完成"
echo "   📊 knowledge/ source: $KNOWLEDGE_COUNT files"
echo "   📊 src/content/ final: $CONTENT_FINAL files"
echo "   📊 synced: $SYNCED_TOTAL files"
echo ""
echo "▶️  下一步：npm run build"