#!/bin/bash
#==============================================================================
# update-hash.sh — 팀 워크플로우 content_hashes 갱신 스크립트
#
# template-common 리포 루트에서 실행한다.
# common 파일 + 각 타입별 파일을 결합하여 SHA256 해시를 계산하고
# workflow-version.json의 content_hashes 필드를 갱신한다.
#
# 사용법:
#   cd template-common && bash update-hash.sh
#
# 의존성: curl, python3, shasum (macOS) 또는 sha256sum (Linux)
#==============================================================================
set -e

# shasum 호환 (macOS: shasum, Linux: sha256sum)
if command -v shasum &>/dev/null; then
  SHA_CMD="shasum -a 256"
elif command -v sha256sum &>/dev/null; then
  SHA_CMD="sha256sum"
else
  echo "ERROR: shasum 또는 sha256sum이 필요합니다."
  exit 1
fi

# Gitea URL 읽기
GITEA_URL=$(python3 -c "import json; print(json.load(open('workflow-version.json')).get('gitea_url', 'https://gitea.gc-si.dev'))" 2>/dev/null)
if [ -z "$GITEA_URL" ]; then
  echo "ERROR: workflow-version.json에서 gitea_url을 읽을 수 없습니다."
  exit 1
fi

TYPES="java-maven java-gradle react-ts"
TYPE_SPECIFIC_FILES=".claude/rules/code-style.md .claude/rules/naming.md .claude/rules/testing.md .githooks/pre-commit"

# 임시 디렉토리
WORK_TMPDIR=$(mktemp -d)
trap "rm -rf $WORK_TMPDIR" EXIT

echo "=== 팀 워크플로우 해시 갱신 ==="
echo "Gitea URL: $GITEA_URL"
echo ""

# 1. common 관리 파일을 임시 디렉토리에 복사
MANAGED_DIRS=".claude/rules .claude/agents .claude/scripts .githooks"
MANAGED_SKILLS=".claude/skills/push .claude/skills/mr .claude/skills/create-mr .claude/skills/release .claude/skills/version .claude/skills/fix-issue"

mkdir -p "$WORK_TMPDIR/common"
for dir in $MANAGED_DIRS $MANAGED_SKILLS; do
  if [ -d "$dir" ]; then
    mkdir -p "$WORK_TMPDIR/common/$dir"
    find "$dir" -type f -exec sh -c 'cp "$1" "'"$WORK_TMPDIR/common"'/$1"' _ {} \;
  fi
done

COMMON_COUNT=$(cd "$WORK_TMPDIR/common" && find . -type f | wc -l | tr -d ' ')
echo "Common 파일: ${COMMON_COUNT}개"

# 2. 각 타입별 해시 계산 → 파일로 저장
HASH_FILE="$WORK_TMPDIR/hashes.json"
echo "{" > "$HASH_FILE"

FIRST=true
for TYPE in $TYPES; do
  echo ""
  echo "--- $TYPE ---"

  # common 파일 복사
  rm -rf "$WORK_TMPDIR/combined"
  cp -r "$WORK_TMPDIR/common" "$WORK_TMPDIR/combined"

  # 타입별 파일 다운로드
  TYPE_COUNT=0
  for FILE in $TYPE_SPECIFIC_FILES; do
    URL="${GITEA_URL}/gc/template-${TYPE}/raw/branch/develop/${FILE}"
    TARGET="$WORK_TMPDIR/combined/$FILE"
    mkdir -p "$(dirname "$TARGET")"

    if curl -sf --max-time 10 "$URL" -o "$TARGET" 2>/dev/null; then
      echo "  ✓ $FILE"
      TYPE_COUNT=$((TYPE_COUNT + 1))
    else
      echo "  ✗ $FILE (다운로드 실패, 건너뜀)"
    fi
  done

  # 해시 계산 (find | sort | xargs cat | shasum — 로컬 계산과 동일한 방식)
  HASH=$(cd "$WORK_TMPDIR/combined" && find .claude/rules .claude/agents .claude/scripts .githooks \
    .claude/skills/push .claude/skills/mr .claude/skills/create-mr \
    .claude/skills/release .claude/skills/version .claude/skills/fix-issue \
    -type f 2>/dev/null | sort | xargs cat 2>/dev/null | $SHA_CMD | cut -d' ' -f1)

  if [ "$FIRST" = true ]; then
    FIRST=false
  else
    echo "," >> "$HASH_FILE"
  fi
  printf '  "%s": "%s"' "$TYPE" "$HASH" >> "$HASH_FILE"

  echo "  타입별 파일: ${TYPE_COUNT}개 추가"
  echo "  해시: $HASH"
done

echo "" >> "$HASH_FILE"
echo "}" >> "$HASH_FILE"

# 3. workflow-version.json 갱신
echo ""
echo "=== workflow-version.json 갱신 ==="

python3 -c "
import json

with open('$HASH_FILE', 'r') as f:
    hashes = json.load(f)

with open('workflow-version.json', 'r') as f:
    data = json.load(f)

data['content_hashes'] = hashes

with open('workflow-version.json', 'w') as f:
    json.dump(data, f, indent=2, ensure_ascii=False)
    f.write('\n')

print('content_hashes 갱신 완료:')
for t, h in hashes.items():
    print(f'  {t}: {h}')
"

echo ""
echo "✅ 완료. workflow-version.json을 커밋하세요."