#!/bin/bash
# Backup Claude Code configuration
# Creates a timestamped archive of important files

set -euo pipefail

CLAUDE_DIR="${HOME}/.claude"
BACKUP_DIR="${CLAUDE_DIR}/backups"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)
BACKUP_NAME="claude-config-${TIMESTAMP}"
BACKUP_PATH="${BACKUP_DIR}/${BACKUP_NAME}.tar.gz"

# Colors
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

echo "📦 Claude Code Configuration Backup"
echo ""

# Create backup directory
mkdir -p "${BACKUP_DIR}"

# Files to backup (relative to CLAUDE_DIR)
BACKUP_ITEMS=(
    "CLAUDE.md"
    "README.md"
    "settings.json"
    ".gitignore"
    ".claude-plugin"
    "agents"
    "commands"
    "hooks"
    "skills"
    "workflows"
    "state"
    "automation"
)

# Create temporary directory
TEMP_DIR=$(mktemp -d)
TEMP_BACKUP="${TEMP_DIR}/${BACKUP_NAME}"
mkdir -p "${TEMP_BACKUP}"

echo "Copying files..."
for item in "${BACKUP_ITEMS[@]}"; do
    if [[ -e "${CLAUDE_DIR}/${item}" ]]; then
        cp -r "${CLAUDE_DIR}/${item}" "${TEMP_BACKUP}/"
        echo -e "  ${GREEN}✓${NC} ${item}"
    else
        echo -e "  ${YELLOW}!${NC} ${item} (not found)"
    fi
done

# Exclude sensitive files
echo ""
echo "Excluding sensitive files..."
find "${TEMP_BACKUP}" -name "*.key" -delete 2>/dev/null || true
find "${TEMP_BACKUP}" -name "*.pem" -delete 2>/dev/null || true
find "${TEMP_BACKUP}" -name "credentials.json" -delete 2>/dev/null || true
find "${TEMP_BACKUP}" -name "token.json" -delete 2>/dev/null || true
find "${TEMP_BACKUP}" -name "settings.local.json" -delete 2>/dev/null || true

# Create archive
echo ""
echo "Creating archive..."
tar -czf "${BACKUP_PATH}" -C "${TEMP_DIR}" "${BACKUP_NAME}"

# Cleanup
rm -rf "${TEMP_DIR}"

# Get size
SIZE=$(du -h "${BACKUP_PATH}" | cut -f1)

echo ""
echo -e "${GREEN}✓${NC} Backup complete!"
echo ""
echo "Location: ${BACKUP_PATH}"
echo "Size: ${SIZE}"
echo ""

# List recent backups
echo "Recent backups:"
ls -lht "${BACKUP_DIR}"/*.tar.gz 2>/dev/null | head -5 || echo "  (none)"

# Cleanup old backups (keep last 10)
BACKUP_COUNT=$(ls -1 "${BACKUP_DIR}"/*.tar.gz 2>/dev/null | wc -l)
if [[ ${BACKUP_COUNT} -gt 10 ]]; then
    echo ""
    echo "Cleaning up old backups (keeping last 10)..."
    ls -1t "${BACKUP_DIR}"/*.tar.gz | tail -n +11 | xargs rm -f
fi