"""
CrewAI Registry Loader - Variant A (Profiles per Agent)
Loads team configurations from crewai_teams.yml with profile support.
"""
import os
import json
import yaml
import logging
from pathlib import Path
from functools import lru_cache

logger = logging.getLogger(__name__)

CREWAI_AGENTS_PATH = os.getenv("CREWAI_AGENTS_PATH", "/app/config/crewai_agents.json")
CREWAI_TEAMS_PATH = os.getenv("CREWAI_TEAMS_PATH", "/app/config/crewai_teams.yml")
ROLES_BASE_PATH = os.getenv("ROLES_BASE_PATH", "/app/config/roles")

_teams_config = None
_agents_config = None


def load_agents_config():
    """Load basic agent config from crewai_agents.json"""
    global _agents_config
    if _agents_config is None:
        try:
            with open(CREWAI_AGENTS_PATH, "r") as f:
                _agents_config = json.load(f)
            logger.info(f"Loaded agents config from {CREWAI_AGENTS_PATH}")
        except Exception as e:
            logger.error(f"Failed to load agents config: {e}")
            _agents_config = {}
    return _agents_config


def load_teams_config():
    """Load teams/profiles config from crewai_teams.yml"""
    global _teams_config
    if _teams_config is None:
        try:
            with open(CREWAI_TEAMS_PATH, "r") as f:
                _teams_config = yaml.safe_load(f)
            version = _teams_config.get("version", "unknown")
            logger.info(f"Loaded teams config v{version} from {CREWAI_TEAMS_PATH}")
        except Exception as e:
            logger.error(f"Failed to load teams config: {e}")
            _teams_config = {}
    return _teams_config


def load_role_prompt(prompt_ref: str) -> str:
    """Load role prompt from .md file"""
    if not prompt_ref:
        return ""
    
    prompt_path = Path(ROLES_BASE_PATH) / prompt_ref
    try:
        if prompt_path.exists():
            return prompt_path.read_text(encoding="utf-8")
        else:
            logger.warning(f"Role prompt not found: {prompt_path}")
            return f"# Role: {prompt_ref}\n(prompt file missing)"
    except Exception as e:
        logger.error(f"Error loading role prompt {prompt_ref}: {e}")
        return ""


def get_agent_profiles(agent_id: str) -> list:
    """Get list of available profiles for an agent"""
    config = load_teams_config()
    agent_cfg = config.get(agent_id, {})
    profiles = agent_cfg.get("profiles", {})
    return list(profiles.keys())


def get_default_profile(agent_id: str) -> str:
    """Get default profile name for an agent"""
    config = load_teams_config()
    agent_cfg = config.get(agent_id, {})
    return agent_cfg.get("default_profile", "default")


def get_profile_hints(agent_id: str) -> dict:
    """Get profile selection hints (keywords) for an agent"""
    config = load_teams_config()
    agent_cfg = config.get(agent_id, {})
    return agent_cfg.get("profile_hints", {})


def select_profile(agent_id: str, prompt: str) -> str:
    """Select appropriate profile based on prompt keywords"""
    hints = get_profile_hints(agent_id)
    prompt_lower = prompt.lower()
    
    for profile_name, keywords in hints.items():
        for kw in keywords:
            if kw.lower() in prompt_lower:
                logger.info(f"Selected profile {profile_name} for {agent_id} (matched: {kw})")
                return profile_name
    
    return get_default_profile(agent_id)


def get_profile_config(agent_id: str, profile: str = None) -> dict:
    """Get full profile configuration for an agent"""
    config = load_teams_config()
    agent_cfg = config.get(agent_id, {})
    profiles = agent_cfg.get("profiles", {})
    
    if profile is None:
        profile = get_default_profile(agent_id)
    
    return profiles.get(profile, {})


def get_team_members(agent_id: str, profile: str = None) -> list:
    """Get team members with resolved prompts"""
    profile_cfg = get_profile_config(agent_id, profile)
    team = profile_cfg.get("team", [])
    
    resolved = []
    for member in team:
        resolved_member = dict(member)
        prompt_ref = member.get("system_prompt_ref", "")
        resolved_member["system_prompt"] = load_role_prompt(prompt_ref)
        resolved.append(resolved_member)
    
    return resolved


def get_synthesis_config(agent_id: str, profile: str = None) -> dict:
    """Get synthesis config with resolved prompt"""
    profile_cfg = get_profile_config(agent_id, profile)
    synthesis = profile_cfg.get("synthesis", {})
    
    if synthesis:
        prompt_ref = synthesis.get("system_prompt_ref", "")
        synthesis = dict(synthesis)
        synthesis["system_prompt"] = load_role_prompt(prompt_ref)
    
    return synthesis


def get_team_settings(agent_id: str, profile: str = None) -> dict:
    """Get team execution settings"""
    profile_cfg = get_profile_config(agent_id, profile)
    return {
        "team_name": profile_cfg.get("team_name", f"{agent_id} team"),
        "parallel_roles": profile_cfg.get("parallel_roles", True),
        "max_concurrency": profile_cfg.get("max_concurrency", 3)
    }


def get_delegation_config(agent_id: str, profile: str = None) -> dict:
    """Get delegation config for an agent"""
    profile_cfg = get_profile_config(agent_id, profile)
    return profile_cfg.get("delegation", {"enabled": False})


def can_delegate_to(agent_id: str, target_agent_id: str, profile: str = None) -> bool:
    """Check if agent can delegate to target"""
    deleg = get_delegation_config(agent_id, profile)
    if not deleg.get("enabled"):
        return False
    if deleg.get("forbid_self") and target_agent_id == agent_id:
        return False
    allowed = deleg.get("allow_top_level_agents", [])
    return target_agent_id in allowed


def is_orchestrator(agent_id: str) -> bool:
    """Check if agent has orchestrator capability"""
    config = load_teams_config()
    return agent_id in config and "profiles" in config.get(agent_id, {})


def get_all_agents_summary() -> dict:
    """Get summary of all agents and their profiles"""
    config = load_teams_config()
    summary = {}
    
    skip_keys = ["schema_version", "version", "description"]
    
    for agent_id, agent_cfg in config.items():
        if agent_id in skip_keys:
            continue
        if not isinstance(agent_cfg, dict):
            continue
            
        profiles = agent_cfg.get("profiles", {})
        summary[agent_id] = {
            "profiles": list(profiles.keys()),
            "default_profile": agent_cfg.get("default_profile", "default"),
            "has_hints": bool(agent_cfg.get("profile_hints"))
        }
        
        # Add role counts per profile
        for pname, pcfg in profiles.items():
            summary[agent_id][f"{pname}_roles"] = len(pcfg.get("team", []))
    
    return summary