"""
멀티클라우드 통합 관제 — NCloud + AWS + 기타

엔드포인트:
  GET  /api/multicloud/providers       — 등록된 프로바이더 목록
  POST /api/multicloud/providers       — 프로바이더 등록
  DELETE /api/multicloud/providers/{id}— 프로바이더 삭제
  GET  /api/multicloud/resources       — 전체 클라우드 리소스 통합
  GET  /api/multicloud/costs           — 전체 비용 통합
  GET  /api/multicloud/summary         — 멀티클라우드 현황 요약
"""
from __future__ import annotations

import json, logging
from datetime import datetime
from typing import Optional

import httpx
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel, Field
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from core.auth import get_current_user, require_admin_role
from database import get_db
from models import User, MultiCloudConfig

logger = logging.getLogger(__name__)
router = APIRouter(prefix="/api/multicloud", tags=["멀티클라우드"])

SUPPORTED_PROVIDERS = ["ncloud", "aws", "gcp", "azure", "kt_cloud", "naver_cloud"]


class ProviderCreate(BaseModel):
    name: str
    provider_type: str = Field(..., description="ncloud|aws|gcp|azure|kt_cloud")
    region: str = "kr-1"
    access_key: str
    secret_key: str
    extra_config: Optional[dict] = None


@router.post("/providers")
async def add_provider(req: ProviderCreate, db: AsyncSession = Depends(get_db), user: User = Depends(require_admin_role)):
    if req.provider_type not in SUPPORTED_PROVIDERS:
        raise HTTPException(400, f"미지원 프로바이더: {req.provider_type}")
    cfg = MultiCloudConfig(
        tenant_id=user.tenant_id, name=req.name,
        provider_type=req.provider_type, region=req.region,
        access_key=req.access_key,
        secret_key_enc=req.secret_key,  # TODO: AES-256-GCM
        extra_config=json.dumps(req.extra_config or {}),
        is_active=True, created_at=datetime.utcnow(),
    )
    db.add(cfg); await db.commit(); await db.refresh(cfg)
    return {"ok": True, "id": cfg.id}


@router.get("/providers")
async def list_providers(db: AsyncSession = Depends(get_db), user: User = Depends(get_current_user)):
    rows = await db.execute(select(MultiCloudConfig).where(MultiCloudConfig.tenant_id == user.tenant_id, MultiCloudConfig.is_active == True))
    return [{"id": c.id, "name": c.name, "type": c.provider_type, "region": c.region} for c in rows.scalars().all()]


@router.delete("/providers/{config_id}")
async def delete_provider(config_id: int, db: AsyncSession = Depends(get_db), user: User = Depends(require_admin_role)):
    row = await db.execute(select(MultiCloudConfig).where(MultiCloudConfig.id == config_id, MultiCloudConfig.tenant_id == user.tenant_id))
    cfg = row.scalar_one_or_none()
    if not cfg: raise HTTPException(404)
    cfg.is_active = False; await db.commit()
    return {"ok": True}


@router.get("/resources")
async def list_all_resources(db: AsyncSession = Depends(get_db), user: User = Depends(get_current_user)):
    rows = await db.execute(select(MultiCloudConfig).where(MultiCloudConfig.tenant_id == user.tenant_id, MultiCloudConfig.is_active == True))
    cfgs = rows.scalars().all()
    all_resources = []
    for cfg in cfgs:
        # NCloud 경유 실제 조회 (다른 프로바이더는 설정 완료 후 활성화)
        if cfg.provider_type in ("ncloud", "naver_cloud"):
            try:
                from routers.ncloud import list_servers as ncloud_list
                # 기존 ncloud.py 재활용
                resources = await _get_ncloud_resources(cfg)
                for r in resources:
                    r["provider"] = cfg.name
                    r["provider_type"] = cfg.provider_type
                all_resources.extend(resources)
            except Exception as e:
                logger.warning(f"NCloud 조회 실패: {e}")
        else:
            all_resources.append({"provider": cfg.name, "provider_type": cfg.provider_type, "note": "설정 후 활성화"})
    return {"resources": all_resources, "total": len(all_resources)}


async def _get_ncloud_resources(cfg: MultiCloudConfig) -> list[dict]:
    try:
        from routers.ncloud import _ncloud_request
        data = await _ncloud_request(cfg, "GET", "/vserver/v2/getServerInstanceList")
        if data:
            return [{"id": s.get("serverInstanceNo"), "name": s.get("serverName"),
                     "status": s.get("serverInstanceStatus", {}).get("codeName"),
                     "ip": s.get("publicIp")} for s in data.get("getServerInstanceListResponse", {}).get("serverInstanceList", [])]
    except Exception: pass
    return []


@router.get("/summary")
async def multicloud_summary(db: AsyncSession = Depends(get_db), user: User = Depends(get_current_user)):
    rows = await db.execute(select(MultiCloudConfig).where(MultiCloudConfig.tenant_id == user.tenant_id, MultiCloudConfig.is_active == True))
    cfgs = rows.scalars().all()
    return {
        "provider_count": len(cfgs),
        "providers": [{"name": c.name, "type": c.provider_type} for c in cfgs],
        "last_checked": datetime.utcnow(),
    }