#!/bin/bash
# =============================================================================
# IGNY8 Full Backup Script
# =============================================================================
# Creates complete backup: database + configuration + code snapshot
# Usage: ./backup-full.sh [weekly|monthly]
# =============================================================================

set -e

# Configuration
BACKUP_TYPE="${1:-weekly}"
TIMESTAMP=$(date +%Y%m%d_%H%M%S)
APP_DIR="/data/app/igny8"
BACKUP_ROOT="/data/backups"

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

log() {
    echo -e "[$(date '+%Y-%m-%d %H:%M:%S')] $1"
}

log_success() {
    log "${GREEN}✅ $1${NC}"
}

log_error() {
    log "${RED}❌ $1${NC}"
}

# Determine backup directory
case $BACKUP_TYPE in
    weekly)
        BACKUP_DIR="${BACKUP_ROOT}/weekly/week_$(date +%Y_%W)"
        ;;
    monthly)
        BACKUP_DIR="${BACKUP_ROOT}/monthly/$(date +%Y_%m)"
        ;;
    *)
        log_error "Invalid backup type. Use: weekly or monthly"
        exit 1
        ;;
esac

mkdir -p "${BACKUP_DIR}"

echo "=========================================="
echo "IGNY8 Full Backup"
echo "=========================================="
echo "Type: ${BACKUP_TYPE}"
echo "Destination: ${BACKUP_DIR}"
echo ""

# Step 1: Database backup
log "Step 1/4: Backing up database..."
/data/app/igny8/scripts/ops/backup-db.sh "${BACKUP_TYPE}" || {
    log_error "Database backup failed"
    exit 1
}

# Step 2: Configuration backup
log "Step 2/4: Backing up configuration files..."
CONFIG_BACKUP="${BACKUP_DIR}/config_${TIMESTAMP}.tar.gz"
tar -czf "${CONFIG_BACKUP}" \
    -C "${APP_DIR}" \
    .env \
    .env.staging 2>/dev/null \
    docker-compose.app.yml \
    docker-compose.staging.yml 2>/dev/null \
    --ignore-failed-read || true

if [[ -f "${CONFIG_BACKUP}" ]]; then
    log_success "Config backup: ${CONFIG_BACKUP}"
else
    log_error "Config backup failed"
fi

# Step 3: Code snapshot (without node_modules, __pycache__, etc.)
log "Step 3/4: Creating code snapshot..."
CODE_BACKUP="${BACKUP_DIR}/code_${TIMESTAMP}.tar.gz"
tar -czf "${CODE_BACKUP}" \
    -C "/data/app" \
    --exclude='igny8/node_modules' \
    --exclude='igny8/frontend/node_modules' \
    --exclude='igny8/__pycache__' \
    --exclude='igny8/**/__pycache__' \
    --exclude='igny8/*.pyc' \
    --exclude='igny8/**/*.pyc' \
    --exclude='igny8/.git' \
    --exclude='igny8/backend/staticfiles' \
    --exclude='igny8/frontend/dist' \
    --exclude='igny8/backend/media' \
    --exclude='igny8/logs' \
    igny8/ 2>/dev/null || true

if [[ -f "${CODE_BACKUP}" ]]; then
    local size=$(du -h "${CODE_BACKUP}" | cut -f1)
    log_success "Code backup: ${CODE_BACKUP} (${size})"
else
    log_error "Code backup failed"
fi

# Step 4: Media files (if they exist)
log "Step 4/4: Backing up media files..."
MEDIA_DIR="${APP_DIR}/backend/media"
if [[ -d "${MEDIA_DIR}" ]] && [[ "$(ls -A ${MEDIA_DIR})" ]]; then
    MEDIA_BACKUP="${BACKUP_DIR}/media_${TIMESTAMP}.tar.gz"
    tar -czf "${MEDIA_BACKUP}" -C "${APP_DIR}/backend" media/ 2>/dev/null || true
    if [[ -f "${MEDIA_BACKUP}" ]]; then
        local media_size=$(du -h "${MEDIA_BACKUP}" | cut -f1)
        log_success "Media backup: ${MEDIA_BACKUP} (${media_size})"
    fi
else
    log "No media files to backup"
fi

# Create manifest
MANIFEST="${BACKUP_DIR}/manifest.txt"
cat > "${MANIFEST}" << EOF
IGNY8 Full Backup Manifest
===========================
Timestamp: ${TIMESTAMP}
Type: ${BACKUP_TYPE}
Server: $(hostname)

Files:
$(ls -la "${BACKUP_DIR}")

Sizes:
$(du -sh "${BACKUP_DIR}"/*)

Git Info:
$(cd "${APP_DIR}" && git log -1 --format='Commit: %H%nDate: %ci%nMessage: %s' 2>/dev/null || echo 'Not a git repo')
EOF

echo ""
echo "=========================================="
echo "BACKUP COMPLETE"
echo "=========================================="
echo "Location: ${BACKUP_DIR}"
echo ""
echo "Contents:"
ls -lh "${BACKUP_DIR}"
echo ""
echo "Total size: $(du -sh ${BACKUP_DIR} | cut -f1)"
echo "=========================================="