"""
CrewAI Client for Router
Handles decision: direct LLM vs CrewAI orchestration
"""
import os
import json
import logging
import httpx
from typing import Dict, Any, Optional, Tuple, List
from pathlib import Path

logger = logging.getLogger(__name__)

CREWAI_URL = os.getenv("CREWAI_URL", "http://dagi-staging-crewai-service:9010")
CREWAI_ENABLED = os.getenv("CREWAI_ENABLED", "true").lower() == "true"

CREWAI_AGENTS_PATH = os.getenv("CREWAI_AGENTS_PATH", "/config/crewai_agents.json")
FALLBACK_CREWAI_PATH = "/app/config/crewai_agents.json"

MIN_PROMPT_LENGTH_FOR_CREW = 100
COMPLEXITY_KEYWORDS = [
    "план", "plan", "аналіз", "analysis", "дослідження", "research",
    "порівняй", "compare", "розроби", "develop", "створи стратегію",
    "декомпозиція", "decompose", "крок за кроком", "step by step",
    "детально", "in detail", "комплексний", "comprehensive"
]

_crewai_cache = None


def load_crewai_config():
    global _crewai_cache
    if _crewai_cache is not None:
        return _crewai_cache
    
    for path in [CREWAI_AGENTS_PATH, FALLBACK_CREWAI_PATH]:
        try:
            p = Path(path)
            if p.exists():
                with open(p, "r", encoding="utf-8") as f:
                    data = json.load(f)
                logger.info(f"Loaded CrewAI config from {path}")
                _crewai_cache = data
                return data
        except Exception as e:
            logger.warning(f"Could not load from {path}: {e}")
    return None


def get_agent_crewai_info(agent_id):
    config = load_crewai_config()
    if not config:
        return {"enabled": False, "orchestrator": False, "team": []}
    
    orchestrators = config.get("orchestrators", [])
    teams = config.get("teams", {})
    
    is_orchestrator = any(o.get("id") == agent_id for o in orchestrators)
    team_info = teams.get(agent_id, {})
    team_members = team_info.get("members", [])
    
    return {
        "enabled": is_orchestrator,
        "orchestrator": is_orchestrator,
        "team": team_members
    }


def should_use_crewai(agent_id, prompt, agent_config, force_crewai=False):
    """
    Decide whether to use CrewAI orchestration or direct LLM.
    Returns: (use_crewai: bool, reason: str)
    """
    if not CREWAI_ENABLED:
        return False, "crewai_disabled_globally"
    
    if force_crewai:
        return True, "force_crewai_requested"
    
    crewai_info = get_agent_crewai_info(agent_id)
    
    if not crewai_info.get("enabled", False):
        return False, "agent_crewai_disabled"
    
    if not crewai_info.get("orchestrator", False):
        return False, "agent_not_orchestrator"
    
    team = crewai_info.get("team", [])
    if not team:
        return False, "agent_has_no_team"
    
    if len(prompt) < MIN_PROMPT_LENGTH_FOR_CREW:
        return False, "prompt_too_short"
    
    prompt_lower = prompt.lower()
    has_complexity = any(kw in prompt_lower for kw in COMPLEXITY_KEYWORDS)
    
    if has_complexity:
        return True, "complexity_keywords_detected"
    
    return False, "default_direct_llm"


async def call_crewai(agent_id, task, context=None, team=None):
    try:
        if not team:
            crewai_info = get_agent_crewai_info(agent_id)
            team = crewai_info.get("team", [])
        
        async with httpx.AsyncClient(timeout=180.0) as client:
            payload = {
                "task": task,
                "orchestrator": agent_id,
                "context": context or {},
            }
            if team:
                payload["team"] = [
                    m.get("role", str(m)) if isinstance(m, dict) else m 
                    for m in team
                ]
            
            logger.info(f"CrewAI call: agent={agent_id}, team={len(team)} members")
            
            response = await client.post(f"{CREWAI_URL}/crew/run", json=payload)
            
            if response.status_code == 200:
                data = response.json()
                success = data.get("success")
                logger.info(f"CrewAI response: success={success}")
                return data
            else:
                logger.error(f"CrewAI error: {response.status_code}")
                return {"success": False, "result": None, "agents_used": [], "error": f"HTTP {response.status_code}"}
    except Exception as e:
        logger.error(f"CrewAI exception: {e}")
        return {"success": False, "result": None, "agents_used": [], "error": str(e)}


async def get_crewai_health():
    try:
        async with httpx.AsyncClient(timeout=5.0) as client:
            response = await client.get(f"{CREWAI_URL}/health")
            return response.json()
    except Exception as e:
        return {"status": "error", "error": str(e)}