#!/bin/bash
# ============================================================
# 迁移收尾：修 P3015（删残缺 migration 目录）、migrate deploy、启动、健康检查
# 用法：在服务器上
#   cd /var/www/wildgrowth-backend/backend && bash deploy/scripts/migration-fix-and-start.sh
# 或（若脚本在 deploy 下）：bash deploy/scripts/migration-fix-and-start.sh
# ============================================================

set -e

GIT_ROOT="${GIT_ROOT:-/var/www/wildgrowth-backend}"
APP_ROOT="${APP_ROOT:-/var/www/wildgrowth-backend/backend}"
MIGRATIONS="$APP_ROOT/prisma/migrations"

echo "═══════════════════════════════════════════════════════════"
echo "  迁移收尾：修复 P3015、migrate、启动、健康检查"
echo "  APP_ROOT=$APP_ROOT"
echo "═══════════════════════════════════════════════════════════"

if [ ! -d "$APP_ROOT" ]; then
    echo "❌ 错误: $APP_ROOT 不存在"
    exit 1
fi
if [ ! -f "$APP_ROOT/.env" ]; then
    echo "❌ 错误: $APP_ROOT/.env 不存在"
    exit 1
fi

cd "$APP_ROOT"

# 1. 删除缺 migration.sql 的目录（解决 P3015）
echo ""
echo "1️⃣  检查 migrations，删除残缺目录..."
if [ -d "$MIGRATIONS" ]; then
    for d in "$MIGRATIONS"/*/; do
        [ -d "$d" ] || continue
        name=$(basename "$d")
        if [ ! -f "${d}migration.sql" ]; then
            echo "    删除残缺目录（无 migration.sql）: $name"
            rm -rf "$d"
        else
            echo "    OK: $name"
        fi
    done
else
    echo "    ⚠️  prisma/migrations 不存在，跳过"
fi

# 2. Prisma migrate deploy
echo ""
echo "2️⃣  执行 prisma migrate deploy..."
npx prisma migrate deploy
echo "✅ 迁移完成"

# 3. 若未 build 则 build（迁移后可能已有 dist，避免重复）
if [ ! -d "dist" ] || [ ! -f "dist/index.js" ]; then
    echo ""
    echo "3️⃣  构建..."
    npm run build
else
    echo ""
    echo "3️⃣  dist 已存在，跳过 build"
fi

# 4. 启动
echo ""
echo "4️⃣  启动服务..."
if pm2 describe wildgrowth-api >/dev/null 2>&1; then
    pm2 restart wildgrowth-api
    echo "    pm2 restart wildgrowth-api"
else
    # 未在 pm2 中则 start
    pm2 start dist/index.js --name wildgrowth-api
    echo "    pm2 start dist/index.js --name wildgrowth-api"
fi

# 5. 健康检查
echo ""
echo "5️⃣  健康检查..."
sleep 3
if curl -sf http://localhost:3000/health >/dev/null; then
    echo "✅ 本机 health 正常"
else
    echo "❌ 本机 health 失败: curl http://localhost:3000/health"
    pm2 logs wildgrowth-api --lines 30 --nostream
    exit 1
fi

# 6. 记录 .deploy-last（若在 Git 根可拿到 HEAD）
if [ -d "$GIT_ROOT/.git" ]; then
    (cd "$GIT_ROOT" && git rev-parse HEAD) > "$APP_ROOT/.deploy-last"
    echo "    .deploy-last 已更新"
fi

echo ""
echo "═══════════════════════════════════════════════════════════"
echo "  ✅ 迁移收尾完成，服务已启动"
echo "  请自测: https://api.muststudy.xin/health"
echo "  回滚: bash deploy/deploy-from-github.sh rollback"
echo "═══════════════════════════════════════════════════════════"