#!/bin/bash
# Agent Factory — export-system.sh
# Packages an agent system into a portable tarball with checksums.
# Usage: bash export-system.sh <export-name>
# Bash 3.2 compatible.

set -e

EXPORT_NAME="${1:-agent-system}"
DATE=$(python3 -c "import datetime; print(datetime.date.today().strftime('%Y-%m-%d'))")
OUTPUT_FILE="agent-system-${EXPORT_NAME}-${DATE}.tar.gz"
STAGING_DIR="/tmp/agent-export-$$"
MANIFEST_FILE="${STAGING_DIR}/MANIFEST.md"

# Determine project root (directory containing .claude/)
PROJECT_ROOT="$(pwd)"
if [ ! -d "${PROJECT_ROOT}/.claude" ]; then
  echo "ERROR: No .claude/ directory found in $(pwd)" >&2
  echo "Run this script from your project root." >&2
  exit 1
fi

echo "[export] Starting export: ${EXPORT_NAME}"
echo "[export] Date: ${DATE}"
echo "[export] Output: ${OUTPUT_FILE}"

mkdir -p "${STAGING_DIR}"

# Collect files — explicit inclusions only
collect_files() {
  local dir="$1"
  local dest="$2"
  if [ -d "${PROJECT_ROOT}/${dir}" ]; then
    mkdir -p "${STAGING_DIR}/${dest}"
    cp -r "${PROJECT_ROOT}/${dir}/." "${STAGING_DIR}/${dest}/" 2>/dev/null || true
    echo "[export] Collected: ${dir}"
  fi
}

collect_files ".claude/agents"  ".claude/agents"
collect_files ".claude/skills"  ".claude/skills"
collect_files ".claude/hooks"   ".claude/hooks"
collect_files "hooks"           "hooks"
collect_files "automation"      "automation"
collect_files "scripts"         "scripts"

# Copy settings.json if it exists
if [ -f "${PROJECT_ROOT}/.claude/settings.json" ]; then
  mkdir -p "${STAGING_DIR}/.claude"
  cp "${PROJECT_ROOT}/.claude/settings.json" "${STAGING_DIR}/.claude/settings.json"
  echo "[export] Collected: .claude/settings.json"
fi

# Copy CLAUDE.md if it exists
if [ -f "${PROJECT_ROOT}/CLAUDE.md" ]; then
  cp "${PROJECT_ROOT}/CLAUDE.md" "${STAGING_DIR}/CLAUDE.md"
  echo "[export] Collected: CLAUDE.md"
fi

# Remove excluded files from staging
echo "[export] Removing excluded files"
rm -f "${STAGING_DIR}/.env" 2>/dev/null || true
find "${STAGING_DIR}" -name "*.local.*" -delete 2>/dev/null || true
find "${STAGING_DIR}" -name "audit.log" -delete 2>/dev/null || true
find "${STAGING_DIR}" -name "cost-events.jsonl" -delete 2>/dev/null || true
find "${STAGING_DIR}" -name ".git" -prune -o -print | grep "\.git$" | xargs rm -rf 2>/dev/null || true
rm -rf "${STAGING_DIR}/memory" 2>/dev/null || true

# Generate MANIFEST.md with checksums
echo "[export] Generating manifest"

COMPONENT_ROWS=""
find "${STAGING_DIR}" -type f | sort | while read -r fpath; do
  rel="${fpath#${STAGING_DIR}/}"
  checksum=$(python3 -c "import hashlib; print(hashlib.sha256(open('${fpath}','rb').read()).hexdigest()[:16])")
  filetype="other"
  case "$rel" in
    .claude/agents/*) filetype="agent" ;;
    .claude/skills/*) filetype="skill" ;;
    .claude/hooks/*|hooks/*) filetype="hook" ;;
    .claude/settings.json) filetype="settings" ;;
    automation/*) filetype="automation" ;;
    CLAUDE.md) filetype="context" ;;
  esac
  echo "| ${filetype} | ${rel} | ${checksum} |" >> "${MANIFEST_FILE}.rows"
done

cat > "${MANIFEST_FILE}" << MANIFEST
# Agent System Manifest
Export name: ${EXPORT_NAME}
Export date: ${DATE}
Generated by: Agent Factory export-system.sh

## Components

| Type | File | Checksum (SHA256, first 16) |
|------|------|---------------------------|
MANIFEST

if [ -f "${MANIFEST_FILE}.rows" ]; then
  cat "${MANIFEST_FILE}.rows" >> "${MANIFEST_FILE}"
  rm "${MANIFEST_FILE}.rows"
fi

cat >> "${MANIFEST_FILE}" << MANIFEST

## Requirements

| Requirement | Value |
|-------------|-------|
| Claude Code version | 1.x or later |
| MCP servers | List any required MCP servers here |
| Tools | List any required tools (Bash, WebSearch, etc.) |
| Environment | List required env vars (ANTHROPIC_API_KEY, etc.) |

## Notes

Add any project-specific setup notes here.
MANIFEST

echo "[export] Manifest written"

# Create tarball
cd "${STAGING_DIR}"
tar -czf "${PROJECT_ROOT}/${OUTPUT_FILE}" .
cd "${PROJECT_ROOT}"

# Cleanup
rm -rf "${STAGING_DIR}"

echo "[export] Done: ${OUTPUT_FILE}"
echo "[export] Size: $(du -sh "${OUTPUT_FILE}" | cut -f1)"