#!/usr/bin/env bash
set -euo pipefail

# ── 경로 설정 ────────────────────────────────────────────────────────────────
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
AGENT_OPS_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
PROJECT_ROOT="$(cd "$AGENT_OPS_DIR/.." && pwd)"

# ── 색상 ─────────────────────────────────────────────────────────────────────
RED='\033[0;31m'; YELLOW='\033[1;33m'; GREEN='\033[0;32m'; RESET='\033[0m'

# ── 진입 파일 공통 관리 ──────────────────────────────────────────────────────
source "$SCRIPT_DIR/entry-files.sh"

# ── 대상 경로 해석 (폴더명 / 상대경로 / 절대경로) ────────────────────────────
resolve_target() {
  local input="$1"
  if [[ "$input" == /* ]]; then
    [[ -d "$input" ]] && echo "$input" || echo ""
    return
  fi
  if [[ "$input" == */* ]]; then
    local resolved
    resolved="$(cd "$input" 2>/dev/null && pwd)" || { echo ""; return; }
    echo "$resolved"
    return
  fi
  local sibling="$(dirname "$PROJECT_ROOT")/$input"
  [[ -d "$sibling" ]] && echo "$sibling" || echo ""
}

# ── 버전 비교: v1 > v2 이면 0 반환 ───────────────────────────────────────────
version_gt() {
  local v1="$1" v2="$2"
  [[ "$v1" == "$v2" ]] && return 1
  [[ "$(printf '%s\n%s' "$v1" "$v2" | sort -V | head -1)" == "$v2" ]]
}

# ── 버전 +1 ──────────────────────────────────────────────────────────────────
bump_version() {
  bash "$SCRIPT_DIR/bump-version.sh" "$1"
}

# ── 폴더 동기화 (rules.md 제외, 삭제된 파일도 반영) ─────────────────────────
sync_folder() {
  local src="$1" dst="$2" exclude="${3:-}"
  mkdir -p "$dst"
  # dst에서 src에 없는 항목 제거 (exclude 파일 보존)
  find "$dst" -mindepth 1 -maxdepth 1 | while IFS= read -r item; do
    local name
    name="$(basename "$item")"
    [[ -n "$exclude" && "$name" == "$exclude" ]] && continue
    if [[ ! -e "$src/$name" ]]; then
      rm -rf "$item"
    fi
  done
  # src에서 dst로 복사 (exclude 파일 제외)
  find "$src" -mindepth 1 -maxdepth 1 | while IFS= read -r item; do
    local name
    name="$(basename "$item")"
    [[ -n "$exclude" && "$name" == "$exclude" ]] && continue
    rm -rf "$dst/$name"
    cp -r "$item" "$dst/"
  done
}

sync_common() {
  local src="$1" dst="$2"
  sync_folder "$src/rules/common" "$dst/rules/common" "rules.md"
  sync_folder "$src/skills/common" "$dst/skills/common"
  sync_folder "$src/bin" "$dst/bin"
}

create_project_agent_ops_dirs() {
  local agent_ops_dir="$1"
  mkdir -p "$agent_ops_dir/rules/project/domain"
  mkdir -p "$agent_ops_dir/rules/private"
  mkdir -p "$agent_ops_dir/skills/project"
}

copy_common_scaffold() {
  local src="$1" dst="$2"
  mkdir -p "$dst/rules" "$dst/skills"
  cp "$src/.version" "$dst/"
  rm -rf "$dst/bin" "$dst/rules/common" "$dst/skills/common"
  cp -r "$src/bin" "$dst/"
  cp -r "$src/rules/common" "$dst/rules/"
  cp -r "$src/skills/common" "$dst/skills/"
  create_project_agent_ops_dirs "$dst"
}

discover_agent_ops_targets() {
  local parent
  parent="$(dirname "$PROJECT_ROOT")"

  find "$parent" -mindepth 1 -maxdepth 1 -type d | sort | while IFS= read -r candidate; do
    local resolved
    resolved="$(cd "$candidate" && pwd)"
    [[ "$resolved" == "$PROJECT_ROOT" ]] && continue
    [[ -d "$resolved/agent-ops" ]] || continue
    echo "$resolved"
  done
}

agent_ops_git_paths() {
  printf '%s\n' "agent-ops/.version"
  printf '%s\n' "agent-ops/bin"
  printf '%s\n' "agent-ops/rules/common"
  printf '%s\n' "agent-ops/skills/common"

  local f
  for f in "${AGENT_OPS_ENTRY_FILES[@]}"; do
    if [[ -e "$f" ]] || git ls-files --error-unmatch "$f" >/dev/null 2>&1; then
      printf '%s\n' "$f"
    fi
  done
}

commit_and_push_agent_ops_scope() {
  local repo="$1" message="$2"

  if ! git -C "$repo" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
    echo -e "${RED}Error: git 저장소가 아닙니다: $repo${RESET}"
    return 1
  fi

  (
    cd "$repo"
    mapfile -t paths < <(agent_ops_git_paths)
    git add -- "${paths[@]}"

    if git diff --cached --quiet -- "${paths[@]}"; then
      echo "  agent-ops 변경 없음: commit 건너뜀"
    else
      git commit -m "$message" -- "${paths[@]}"
    fi

    git push
  )
}

sync_framework_to_target() {
  local target="$1"
  local dst_ao="$target/agent-ops"
  local src_ver
  src_ver="$(cat "$SRC_AO/.version" 2>/dev/null || echo "0.0.0")"

  echo "▶ $(basename "$PROJECT_ROOT") → $(basename "$target")"

  if ! git -C "$target" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
    echo -e "${RED}Error: git 저장소가 아닙니다: $target${RESET}"
    return 1
  fi

  if [[ ! -d "$dst_ao" ]]; then
    echo "  최초 진행: agent-ops 공통 scaffold 복사"
    copy_common_scaffold "$SRC_AO" "$dst_ao"
    apply_agent_ops_entry_files "$SRC_AO/rules/common/rules.md" "$target"
    echo -e "${YELLOW}  init-agent-ops 스킬로 초기화를 진행하세요.${RESET}"
  else
    echo "  이후 진행: common/ 동기화"
    sync_common "$SRC_AO" "$dst_ao"
    cp "$SRC_AO/.version" "$dst_ao/.version"
    apply_agent_ops_entry_files "$SRC_AO/rules/common/rules.md" "$target"
  fi

  commit_and_push_agent_ops_scope "$target" "sync: agent-ops from $(basename "$PROJECT_ROOT") v$src_ver"
  echo -e "${GREEN}✓ 완료 → $(basename "$target")${RESET}"
}

# ── 사용법 ────────────────────────────────────────────────────────────────────
usage() {
  echo "사용법: $0 [--pull] [target]"
  echo ""
  echo "  (기본)   push 동기화"
  echo "  --pull   target(agentic-framework) → 현재 프로젝트 로 pull"
  echo ""
  echo "  target: 폴더명 (동일 레벨 탐색) | 상대경로 | 절대경로"
  echo "  agentic-framework에서 target 생략 시 상위 폴더의 agent-ops 적용 프로젝트 전체 동기화"
}

# ─────────────────────────────────────────────────────────────────────────────
PULL_MODE="0"
if [[ "${1:-}" == "--pull" ]]; then
  PULL_MODE="1"
  shift
fi

TARGET_INPUT="${1:-}"

SRC_AO="$AGENT_OPS_DIR"
IS_FRAMEWORK="$([[ -f "$PROJECT_ROOT/.agent-ops-source" ]] && echo "1" || echo "0")"

# ── pull 모드: agentic-framework → 현재 프로젝트 ─────────────────────────────
if [[ "$PULL_MODE" == "1" ]]; then
  if [[ -z "$TARGET_INPUT" ]]; then
    usage; exit 1
  fi
  TARGET="$(resolve_target "$TARGET_INPUT")"
  if [[ -z "$TARGET" ]]; then
    echo -e "${RED}Error: 대상을 찾을 수 없습니다: $TARGET_INPUT${RESET}"
    exit 1
  fi
  DST_AO="$TARGET/agent-ops"

  if [[ "$IS_FRAMEWORK" == "1" ]]; then
    echo -e "${RED}Error: agentic-framework에서는 --pull을 사용할 수 없습니다.${RESET}"
    exit 1
  fi
  if [[ ! -f "$TARGET/.agent-ops-source" ]]; then
    echo -e "${RED}Error: target이 agentic-framework가 아닙니다 (.agent-ops-source 없음)${RESET}"
    exit 1
  fi
  SRC_VER="$(cat "$SRC_AO/.version" 2>/dev/null || echo "0.0.0")"
  DST_VER="$(cat "$DST_AO/.version" 2>/dev/null || echo "0.0.0")"
  echo "▶ $(basename "$TARGET") → $(basename "$PROJECT_ROOT") (pull)"
  echo "  현재 버전: $SRC_VER | framework 버전: $DST_VER"
  sync_common "$DST_AO" "$SRC_AO"
  cp "$DST_AO/.version" "$SRC_AO/.version"
  apply_agent_ops_entry_files "$DST_AO/rules/common/rules.md" "$PROJECT_ROOT"
  cd "$PROJECT_ROOT"
  git add agent-ops/rules/common agent-ops/skills/common agent-ops/bin agent-ops/.version \
          "${AGENT_OPS_ENTRY_FILES[@]}"
  git commit -m "sync: pull from agentic-framework v$DST_VER"
  git push
  echo -e "${GREEN}✓ 완료 (pull v$DST_VER)${RESET}"
  exit 0
fi

# ── agentic-framework에서 다른 프로젝트로 ────────────────────────────────────
if [[ "$IS_FRAMEWORK" == "1" ]]; then
  if [[ -n "$TARGET_INPUT" ]]; then
    TARGET="$(resolve_target "$TARGET_INPUT")"
    if [[ -z "$TARGET" ]]; then
      echo -e "${RED}Error: 대상을 찾을 수 없습니다: $TARGET_INPUT${RESET}"
      exit 1
    fi
    sync_framework_to_target "$TARGET"
  else
    mapfile -t TARGETS < <(discover_agent_ops_targets)
    if [[ "${#TARGETS[@]}" -eq 0 ]]; then
      echo -e "${YELLOW}agent-ops가 적용된 sibling 프로젝트가 없습니다.${RESET}"
      exit 0
    fi

    STATUS=0
    for TARGET in "${TARGETS[@]}"; do
      if ! sync_framework_to_target "$TARGET"; then
        STATUS=1
      fi
    done
    exit "$STATUS"
  fi
  exit 0
fi

# ── 일반 프로젝트에서 agentic-framework로 (push) ─────────────────────────────
if [[ -z "$TARGET_INPUT" ]]; then
  TARGET_INPUT="agentic-framework"
fi

TARGET="$(resolve_target "$TARGET_INPUT")"
if [[ -z "$TARGET" ]]; then
  echo -e "${RED}Error: 대상을 찾을 수 없습니다: $TARGET_INPUT${RESET}"
  exit 1
fi
DST_AO="$TARGET/agent-ops"

echo "▶ $(basename "$PROJECT_ROOT") → $(basename "$TARGET")"

if [[ ! -f "$TARGET/.agent-ops-source" ]]; then
  echo -e "${RED}Error: target이 agentic-framework가 아닙니다 (.agent-ops-source 없음)${RESET}"
  exit 1
fi

SRC_VER="$(cat "$SRC_AO/.version" 2>/dev/null || echo "0.0.0")"
DST_VER="$(cat "$DST_AO/.version" 2>/dev/null || echo "0.0.0")"
echo "  현재 버전: $SRC_VER | framework 버전: $DST_VER"

if version_gt "$DST_VER" "$SRC_VER"; then
  echo -e "${RED}⚠  버전 충돌: framework($DST_VER) > current($SRC_VER)${RESET}"
  echo -e "${YELLOW}   먼저 sync-pull로 내려받은 뒤 재시도하세요.${RESET}"
  exit 1
fi

NEW_VER="$(bump_version "$SRC_VER")"
sync_common "$SRC_AO" "$DST_AO"
echo "$NEW_VER" > "$SRC_AO/.version"
echo "$NEW_VER" > "$DST_AO/.version"

commit_and_push_agent_ops_scope "$TARGET" "sync: from $(basename "$PROJECT_ROOT") v$NEW_VER"
commit_and_push_agent_ops_scope "$PROJECT_ROOT" "sync: to agentic-framework v$NEW_VER"

echo -e "${GREEN}✓ 완료 (v$SRC_VER → v$NEW_VER)${RESET}"