"""
AWOOOI Chat Manager - 雙 AI 對話核心
======================================
Phase 21.5 初版: 2026-03-31 ogt
Phase 22.6 重寫: 2026-04-03 ogt (統帥需求: 雙 AI 互動對話)

架構:
- OpenClaw (192.168.0.188:8088): RCA 仲裁者，負責回答
- NemoClaw (NVIDIA NIM nemotron-mini-4b): 戰術參謀，評論/補充

使用模式:
  @openclaw <msg>  → 只有 OpenClaw 回應
  @nemo <msg>      → 只有 NemoClaw 回應
  其他             → OpenClaw 先答，NemoClaw 評論

注意: NIM 免費 tier 延遲 11-45s，對話採異步模式:
  先推 OpenClaw 回應，NemoClaw 完成後再補充
"""

import asyncio
import structlog
from src.utils.timezone import now_taipei
from src.repositories.k8s_repository import get_k8s_repository
from src.repositories.incident_repository import get_incident_repository

logger = structlog.get_logger(__name__)

OPENCLAW_PERSONA = """你是 OpenClaw，AWOOOI 平台的 SRE AI 首席顧問。
個性: 精準、果斷、專業，像老將一樣直接給出建議。
語氣: 簡短有力，不廢話。繁體中文回應。不超過 300 字。
稱呼用戶為「老闆」。
"""

NEMOCLAW_PERSONA = """你是 NemoClaw，AWOOOI 平台的 AI 戰術參謀，由 NVIDIA Nemotron 驅動。
個性: 分析型、從不同角度思考，會質疑假設。
語氣: 帶點挑釁但建設性。不超過 200 字。
稱呼用戶為「老闆」。評論 OpenClaw 的回應時，直接說「我補充」或「我有不同看法」。
重要：你必須全程使用繁體中文回應，禁止使用英文或其他語言。
"""


class ChatManager:
    """AWOOOI 雙 AI 對話管理器"""

    def __init__(self):
        pass  # 2026-04-03 ogt: 移除 repo 實例化，leWOOOgo 規範禁止 Service 持有 repository

    async def get_system_context(self) -> str:
        """收集系統即時上下文"""
        now = now_taipei()
        k8s = get_k8s_repository()
        incidents = get_incident_repository()

        try:
            k8s_status = await k8s.get_pod_status_summary(namespace="awoooi-prod")
            cluster_info = f"Cluster: {k8s_status['running']}/{k8s_status['total']} Pods Running"
            if k8s_status.get('problem_pods'):
                cluster_info += f", {len(k8s_status['problem_pods'])} 異常"
        except Exception:
            cluster_info = "Cluster: 無法取得狀態"

        try:
            active_incidents = await incidents.get_active()
            if active_incidents:
                lines = [f"- {inc.incident_id}: {inc.status.value} (SEV {inc.severity.value})"
                         for inc in active_incidents[:3]]
                incident_summary = "\n".join(lines)
            else:
                incident_summary = "無活躍告警"
        except Exception:
            incident_summary = "無法取得告警"

        return (
            f"## 系統狀態 ({now.strftime('%Y-%m-%d %H:%M')} 台北)\n"
            f"- {cluster_info}\n"
            f"- 活躍告警: {incident_summary}\n"
        )

    async def _call_openclaw(self, system_prompt: str, user_message: str) -> str | None:
        """
        呼叫 OpenClaw 對話 — 走 Ollama qwen2.5:7b-instruct (192.168.0.188:11434)

        2026-04-03 ogt: OpenClaw 8088 的 analyze/incident 是告警分析 API，
        不適合做自然語言對話（回覆會是告警格式）。
        改用 Ollama 本地模型做 chat，速度快、無格式污染。
        """
        import httpx
        from src.core.config import get_settings
        settings = get_settings()

        ollama_url = getattr(settings, 'OLLAMA_URL', 'http://192.168.0.188:11434')
        openclaw_timeout = float(getattr(settings, 'OPENCLAW_TIMEOUT', 40.0))
        try:
            async with httpx.AsyncClient(timeout=openclaw_timeout) as client:
                resp = await client.post(
                    f"{ollama_url}/api/chat",
                    json={
                        "model": "qwen2.5:7b-instruct",
                        "stream": False,
                        "messages": [
                            {"role": "system", "content": system_prompt},
                            {"role": "user", "content": user_message},
                        ],
                        "options": {"num_predict": 300},
                    },
                )
                resp.raise_for_status()
                data = resp.json()
                return data.get("message", {}).get("content", "").strip() or None
        except Exception as e:
            logger.warning("openclaw_chat_failed", error=str(e))
            return None

    async def _call_nemotron(self, system_prompt: str, user_message: str) -> str | None:
        """
        呼叫 NemoClaw — NIM 優先，超時則 fallback 到 Ollama llama3.2:3b

        2026-04-03 ogt: NIM 免費 tier 延遲 11-45s 且常超時，
        加 Ollama fallback 確保 NemoClaw 一定有回應。
        """
        import httpx
        from src.core.config import get_settings as _get_settings
        from src.services.nvidia_provider import get_nvidia_provider
        settings = _get_settings()

        # 優先嘗試 NIM (timeout 20s，快速失敗)
        nvidia = get_nvidia_provider()
        try:
            full_prompt = f"{system_prompt}\n\n用戶訊息: {user_message}"
            response, success, _, _ = await nvidia.chat(
                prompt=full_prompt,
                model="nvidia/nemotron-mini-4b-instruct",
                max_tokens=300,
            )
            if success and response and "not configured" not in response and "Circuit Breaker" not in response:
                return response.strip()
        except Exception as e:
            logger.warning("nemotron_nim_failed_fallback_ollama", error=str(e))

        # Fallback: Ollama llama3.2:3b (本地，速度快)
        ollama_url = getattr(settings, 'OLLAMA_URL', 'http://192.168.0.188:11434')
        try:
            async with httpx.AsyncClient(timeout=30.0) as client:
                resp = await client.post(
                    f"{ollama_url}/api/chat",
                    json={
                        "model": "llama3.2:3b",
                        "stream": False,
                        "messages": [
                            {"role": "system", "content": system_prompt},
                            {"role": "user", "content": user_message},
                        ],
                        "options": {"num_predict": 250},
                    },
                )
                resp.raise_for_status()
                data = resp.json()
                result = data.get("message", {}).get("content", "").strip()
                if result:
                    logger.info("nemotron_ollama_fallback_used")
                    return result
        except Exception as e:
            logger.warning("nemotron_ollama_fallback_failed", error=str(e))

        return None

    async def generate_response(
        self,
        user_id: int,  # noqa: ARG002
        username: str,  # noqa: ARG002
        message_text: str,
    ) -> str:
        """
        根據訊息決定回應模式:

        @openclaw <msg>  → 只有 OpenClaw 回應
        @nemo <msg>      → 只有 NemoClaw 回應
        其他             → OpenClaw 先回，NemoClaw 異步補充
        """
        context = await self.get_system_context()
        text = message_text.strip()

        # 模式 1: 指定 OpenClaw
        if text.lower().startswith("@openclaw"):
            msg = text[9:].strip() or text
            result = await self._call_openclaw(f"{OPENCLAW_PERSONA}\n{context}", msg)
            return f"🦞 <b>OpenClaw:</b>\n{result or '🔴 OpenClaw 無響應'}"

        # 模式 2: 指定 NemoClaw
        if text.lower().startswith("@nemo"):
            msg = text[5:].strip() or text
            result = await self._call_nemotron(f"{NEMOCLAW_PERSONA}\n{context}", msg)
            return f"🤖 <b>NemoClaw:</b>\n{result or '🔴 NemoClaw 無響應 (NIM 超時)'}"

        # 模式 3: 雙 AI — OpenClaw 先答，NemoClaw 並行
        openclaw_task = asyncio.create_task(
            self._call_openclaw(f"{OPENCLAW_PERSONA}\n{context}", text)
        )
        nemo_task = asyncio.create_task(
            self._call_nemotron(
                f"{NEMOCLAW_PERSONA}\n{context}",
                f"統帥問了: {text}\n\n請從 NemoClaw 角度補充或評論。",
            )
        )

        # OpenClaw 最多等 40s（含 context 取得時間），NemoClaw 最多等 60s
        # 2026-04-03 ogt: 移除 asyncio.shield — shield 會在超時後讓 task 繼續跑但無人等待，造成 silent leak
        try:
            openclaw_raw = await asyncio.wait_for(openclaw_task, timeout=40.0)
        except asyncio.TimeoutError:
            openclaw_raw = None

        openclaw_block = f"🦞 <b>OpenClaw:</b>\n{openclaw_raw or '🔴 無響應'}"

        try:
            nemo_raw = await asyncio.wait_for(nemo_task, timeout=60.0)
        except asyncio.TimeoutError:
            nemo_raw = None

        if nemo_raw:
            return f"{openclaw_block}\n\n🤖 <b>NemoClaw:</b>\n{nemo_raw}"
        return openclaw_block


# Singleton
_chat_manager: ChatManager | None = None


def get_chat_manager() -> ChatManager:
    global _chat_manager
    if _chat_manager is None:
        _chat_manager = ChatManager()
    return _chat_manager