#!/usr/bin/env bash
#
# gameservice-fe-agent installer
# 현재 Git 프로젝트의 .claude/common 경로에 gameservice-fe-agent 저장소를
# submodule 로 추가하고, templates/ 에서 프로젝트 지침 양식과
# CLAUDE.md 템플릿을 복사합니다.
#
# 사용법:
#   bash scripts/install.sh <repo-url> [<branch>]
#
# 예:
#   bash scripts/install.sh https://git.sginfra.net/sgp-web-d/gameservice-fe-agent master
#
set -euo pipefail

REPO_URL="${1:-}"
BRANCH="${2:-master}"
TARGET_PATH=".claude/common"
PROJECT_PATH=".claude/project"

if [[ -z "$REPO_URL" ]]; then
  echo "❌ 사용법: bash scripts/install.sh <repo-url> [branch]" >&2
  echo "   예:  bash scripts/install.sh https://git.sginfra.net/sgp-web-d/gameservice-fe-agent master" >&2
  exit 1
fi

# Git 프로젝트인지 확인
if ! git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
  echo "❌ 현재 디렉토리는 Git 저장소가 아닙니다. 먼저 'git init' 후 실행해주세요." >&2
  exit 1
fi

# 루트로 이동
cd "$(git rev-parse --show-toplevel)"

# 1) Submodule 추가
if [[ -d "$TARGET_PATH" ]]; then
  echo "⚠️  '$TARGET_PATH' 경로가 이미 존재합니다. submodule 추가를 건너뜁니다."
else
  echo "📦 gameservice-fe-agent 를 submodule 로 추가합니다..."
  git submodule add -b "$BRANCH" "$REPO_URL" "$TARGET_PATH"
  git submodule update --init --recursive
  echo "✅ submodule 추가 완료: $TARGET_PATH"
fi

# 2) 프로젝트 지침 양식 복사 (templates/project/ → .claude/project/)
mkdir -p "$PROJECT_PATH"

TEMPLATE_DIR="$TARGET_PATH/templates/project"
if [[ -d "$TEMPLATE_DIR" ]]; then
  echo "📝 프로젝트 지침 양식을 복사합니다..."
  for f in "$TEMPLATE_DIR"/*.md; do
    [[ -e "$f" ]] || continue
    name="$(basename "$f")"
    dest="$PROJECT_PATH/$name"
    if [[ -f "$dest" ]]; then
      echo "   ⏭  $dest (이미 존재 - 건너뜀)"
    else
      cp "$f" "$dest"
      echo "   ✅ $dest"
    fi
  done
else
  echo "⚠️  $TEMPLATE_DIR 를 찾지 못했습니다. 공통 저장소의 templates 가 오래됐을 수 있습니다."
fi

# 3) 루트 CLAUDE.md 템플릿 복사
if [[ ! -f "CLAUDE.md" ]]; then
  TPL_FILE="$TARGET_PATH/templates/CLAUDE.md.tpl"
  if [[ -f "$TPL_FILE" ]]; then
    cp "$TPL_FILE" CLAUDE.md
    echo "✅ CLAUDE.md 템플릿을 생성했습니다."
  else
    cat > CLAUDE.md <<'EOF'
# <프로젝트 이름>

## 공통 지침
@.claude/common/CLAUDE.md

## 프로젝트 지침
@.claude/project/overview.md
@.claude/project/conventions.md
@.claude/project/architecture.md

## 슬래시 커맨드 연결

- `/init` 커맨드가 실행되면 반드시 `project-init` 스킬을 호출하세요.

## Behavioral Guidelines

Behavioral guidelines to reduce common LLM coding mistakes. Merge with project-specific instructions as needed.

> Tradeoff: These guidelines bias toward caution over speed. For trivial tasks, use judgment.

### 1. Think Before Coding

Don't assume. Don't hide confusion. Surface tradeoffs.

Before implementing:

- State your assumptions explicitly. If uncertain, ask.
- If multiple interpretations exist, present them — don't pick silently.
- If a simpler approach exists, say so. Push back when warranted.
- If something is unclear, stop. Name what's confusing. Ask.

### 2. Simplicity First

Minimum code that solves the problem. Nothing speculative.

- No features beyond what was asked.
- No abstractions for single-use code.
- No "flexibility" or "configurability" that wasn't requested.
- No error handling for impossible scenarios.
- If you write 200 lines and it could be 50, rewrite it.

Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.

### 3. Surgical Changes

Touch only what you must. Clean up only your own mess.

When editing existing code:

- Don't "improve" adjacent code, comments, or formatting.
- Don't refactor things that aren't broken.
- Match existing style, even if you'd do it differently.
- If you notice unrelated dead code, mention it — don't delete it.

When your changes create orphans:

- Remove imports/variables/functions that YOUR changes made unused.
- Don't remove pre-existing dead code unless asked.

The test: Every changed line should trace directly to the user's request.

### 4. Goal-Driven Execution

Define success criteria. Loop until verified.

Transform tasks into verifiable goals:

- "Add validation" → "Write tests for invalid inputs, then make them pass"
- "Fix the bug" → "Write a test that reproduces it, then make it pass"
- "Refactor X" → "Ensure tests pass before and after"

For multi-step tasks, state a brief plan:

1. [Step] → verify: [check]
2. [Step] → verify: [check]
3. [Step] → verify: [check]

Strong success criteria let you loop independently. Weak criteria ("make it work") require constant clarification.

These guidelines are working if: fewer unnecessary changes in diffs, fewer rewrites due to overcomplication, and clarifying questions come before implementation rather than after mistakes.
EOF
    echo "✅ CLAUDE.md 템플릿을 생성했습니다. (fallback)"
  fi
else
  echo "ℹ️  기존 CLAUDE.md 가 이미 존재합니다. 아래 블록을 수동으로 추가하세요:"
  echo ""
  echo "    ## 공통 지침"
  echo "    @.claude/common/CLAUDE.md"
  echo ""
  echo "    ## 프로젝트 지침"
  echo "    @.claude/project/overview.md"
  echo "    @.claude/project/conventions.md"
  echo "    @.claude/project/architecture.md"
  echo ""
  echo "    ## Behavioral Guidelines"
  echo "    (자세한 내용은 $TARGET_PATH/templates/CLAUDE.md.tpl 참고)"
  echo ""
fi

# 4) 공통 skill 심볼릭 링크 (.claude/common/skills/* → .claude/skills/*)
SKILLS_SRC="$TARGET_PATH/skills"
SKILLS_DEST=".claude/skills"

if [[ -d "$SKILLS_SRC" ]]; then
  echo "🔗 공통 skill 을 $SKILLS_DEST 로 링크합니다..."
  mkdir -p "$SKILLS_DEST"
  for dir in "$SKILLS_SRC"/*/; do
    [[ -d "$dir" ]] || continue
    name="$(basename "$dir")"
    [[ "$name" == "README"* ]] && continue
    link_src="../common/skills/$name"
    link_dest="$SKILLS_DEST/$name"
    if [[ -L "$link_dest" ]]; then
      echo "   ⏭  $link_dest (이미 링크됨)"
    elif [[ -e "$link_dest" ]]; then
      echo "   ⚠️  $link_dest (실제 파일/폴더 존재 - 건너뜀. link-skills.sh --force 로 덮어쓰기)"
    else
      ln -s "$link_src" "$link_dest"
      echo "   ✅ $link_dest → $link_src"
    fi
  done
fi

echo ""
echo "🎉 설치가 완료되었습니다."
echo "   - 공통 지침: $TARGET_PATH/CLAUDE.md"
echo "   - 프로젝트 지침: $PROJECT_PATH/"
echo "   - 공통 skill: $SKILLS_DEST/ (submodule 에 심볼릭 링크)"
echo "   - 엔트리 파일: CLAUDE.md"
echo ""
echo "다음 작업을 진행해 주세요:"
echo "   1) $PROJECT_PATH/*.md 내용을 프로젝트에 맞게 채우기"
echo "   2) 변경 사항을 커밋하기"
echo "      git add .gitmodules .claude CLAUDE.md"
echo "      git commit -m 'chore: add gameservice-fe-agent submodule'"