#!/bin/bash
# kb-web 自动部署脚本
# 用法: ./deploy.sh [test|prod] [branch]

set -e

DEPLOY_ENV=${1:-test}
BRANCH=${2:-main}
TIMESTAMP=$(date +"%Y%m%d_%H%M%S")

# 配置
case $DEPLOY_ENV in
    test)
        DEPLOY_DIR="/var/www/kb-web-test"
        BACKUP_DIR="/var/www/kb-web-test-backups"
        ;;
    prod)
        DEPLOY_DIR="/var/www/kb-web-prod"
        BACKUP_DIR="/var/www/kb-web-prod-backups"
        ;;
    *)
        echo "用法: $0 [test|prod] [branch]"
        exit 1
        ;;
esac

REPO_URL="ssh://sc-gitea@192.168.1.22:2223/starmen1265/kb-web.git"
LOG_FILE="/var/log/kb-web-deploy.log"

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

log "========== 开始部署 $DEPLOY_ENV 环境 =========="
log "分支: $BRANCH"
log "目标目录: $DEPLOY_DIR"

# 创建目录
mkdir -p "$DEPLOY_DIR" "$BACKUP_DIR" "$(dirname "$LOG_FILE")"

# 备份当前版本
if [ -d "$DEPLOY_DIR/.git" ]; then
    log "备份当前版本..."
    CURRENT_COMMIT=$(cd "$DEPLOY_DIR" && git rev-parse --short HEAD 2>/dev/null || echo "unknown")
    tar -czf "$BACKUP_DIR/backup_${CURRENT_COMMIT}_${TIMESTAMP}.tar.gz" -C "$DEPLOY_DIR" . 2>/dev/null || true
    # 只保留最近5个备份
    cd "$BACKUP_DIR" && ls -t | tail -n +6 | xargs -r rm -f
fi

# 拉取代码
if [ -d "$DEPLOY_DIR/.git" ]; then
    log "更新代码..."
    cd "$DEPLOY_DIR"
    git fetch origin
    git reset --hard "origin/$BRANCH"
else
    log "克隆代码..."
    git clone -b "$BRANCH" "$REPO_URL" "$DEPLOY_DIR"
    cd "$DEPLOY_DIR"
fi

# 设置权限
log "设置权限..."
chown -R www-data:www-data "$DEPLOY_DIR" 2>/dev/null || chown -R nginx:nginx "$DEPLOY_DIR" 2>/dev/null || true
find "$DEPLOY_DIR" -type d -exec chmod 755 {} \;
find "$DEPLOY_DIR" -type f -exec chmod 644 {} \;

# 记录部署信息
DEPLOY_INFO="$DEPLOY_DIR/.deploy_info"
cat > "$DEPLOY_INFO" << EOF
环境: $DEPLOY_ENV
分支: $BRANCH
提交: $(git rev-parse HEAD)
时间: $(date '+%Y-%m-%d %H:%M:%S')
部署者: webhook
EOF

log "部署完成!"
log "提交: $(git log -1 --oneline)"
log "=========================================="