"""Portfolio Manager graph — orchestrates the full PM workflow."""

from __future__ import annotations

from typing import Any, List, Optional

from tradingagents.default_config import DEFAULT_CONFIG
from tradingagents.llm_clients import create_llm_client
from tradingagents.agents.portfolio import (
    create_holding_reviewer,
    create_pm_decision_agent,
)
from .portfolio_setup import PortfolioGraphSetup


class PortfolioGraph:
    """Orchestrates the Portfolio Manager workflow.

    Sequential phases:
    1. load_portfolio — fetch portfolio + holdings from DB
    2. compute_risk — compute portfolio risk metrics
    3. review_holdings — LLM reviews all open positions (mid_think)
    4. prioritize_candidates — score and rank scanner candidates
    5. pm_decision — LLM produces BUY/SELL/HOLD decisions (deep_think)
    6. execute_trades — execute decisions and take EOD snapshot
    """

    def __init__(
        self,
        config: dict[str, Any] | None = None,
        debug: bool = False,
        callbacks: Optional[List] = None,
        repo=None,
    ) -> None:
        """Initialize the portfolio graph.

        Args:
            config: Configuration dictionary.  Falls back to DEFAULT_CONFIG.
            debug: Whether to print intermediate state chunks during streaming.
            callbacks: Optional LangChain callback handlers.
            repo: PortfolioRepository instance.  If None, created lazily from DB.
        """
        self.config = config or DEFAULT_CONFIG.copy()
        self.debug = debug
        self.callbacks = callbacks or []
        self._repo = repo

        mid_llm = self._create_llm("mid_think")
        deep_llm = self._create_llm("deep_think")

        agents = {
            "review_holdings": create_holding_reviewer(mid_llm),
            "pm_decision": create_pm_decision_agent(deep_llm),
        }

        portfolio_config = self._get_portfolio_config()
        setup = PortfolioGraphSetup(agents, repo=self._repo, config=portfolio_config)
        self.graph = setup.setup_graph()

    def _get_portfolio_config(self) -> dict[str, Any]:
        """Extract portfolio-specific config keys."""
        from tradingagents.portfolio.config import get_portfolio_config

        return get_portfolio_config()

    def _create_llm(self, tier: str) -> Any:
        """Create an LLM instance for the given tier.

        Mirrors ScannerGraph._create_llm logic exactly.

        Args:
            tier: One of ``"quick_think"``, ``"mid_think"``, ``"deep_think"``.

        Returns:
            A LangChain-compatible chat model instance.
        """
        kwargs = self._get_provider_kwargs(tier)

        if tier == "mid_think":
            model = self.config.get("mid_think_llm") or self.config["quick_think_llm"]
            provider = (
                self.config.get("mid_think_llm_provider")
                or self.config.get("quick_think_llm_provider")
                or self.config["llm_provider"]
            )
            backend_url = (
                self.config.get("mid_think_backend_url")
                or self.config.get("quick_think_backend_url")
                or self.config.get("backend_url")
            )
        else:
            model = self.config[f"{tier}_llm"]
            provider = (
                self.config.get(f"{tier}_llm_provider") or self.config["llm_provider"]
            )
            backend_url = (
                self.config.get(f"{tier}_backend_url") or self.config.get("backend_url")
            )

        if self.callbacks:
            kwargs["callbacks"] = self.callbacks

        client = create_llm_client(
            provider=provider,
            model=model,
            base_url=backend_url,
            **kwargs,
        )
        return client.get_llm()

    def _get_provider_kwargs(self, tier: str) -> dict[str, Any]:
        """Resolve provider-specific kwargs (e.g. thinking_level, reasoning_effort)."""
        kwargs: dict[str, Any] = {}
        prefix = f"{tier}_"
        provider = (
            self.config.get(f"{prefix}llm_provider") or self.config.get("llm_provider", "")
        ).lower()

        if provider == "google":
            thinking_level = self.config.get(f"{prefix}google_thinking_level") or self.config.get(
                "google_thinking_level"
            )
            if thinking_level:
                kwargs["thinking_level"] = thinking_level

        elif provider in ("openai", "xai", "openrouter", "ollama"):
            reasoning_effort = self.config.get(
                f"{prefix}openai_reasoning_effort"
            ) or self.config.get("openai_reasoning_effort")
            if reasoning_effort:
                kwargs["reasoning_effort"] = reasoning_effort

        return kwargs

    def run(
        self,
        portfolio_id: str,
        date: str,
        prices: dict[str, float],
        scan_summary: dict[str, Any],
    ) -> dict[str, Any]:
        """Run the full portfolio manager workflow.

        Args:
            portfolio_id: ID of the portfolio to manage.
            date: Analysis date string (YYYY-MM-DD).
            prices: Current EOD prices (ticker → price).
            scan_summary: Macro scan output from ScannerGraph (contains
                          ``stocks_to_investigate`` and optionally
                          ``price_histories``).

        Returns:
            Final LangGraph state dict containing all workflow outputs.
        """
        initial_state: dict[str, Any] = {
            "portfolio_id": portfolio_id,
            "analysis_date": date,
            "prices": prices,
            "scan_summary": scan_summary,
            "messages": [],
            "portfolio_data": "",
            "risk_metrics": "",
            "holding_reviews": "",
            "prioritized_candidates": "",
            "pm_decision": "",
            "execution_result": "",
            "sender": "",
        }

        if self.debug:
            final_state = {}
            for chunk in self.graph.stream(initial_state):
                print(f"[portfolio debug] chunk keys: {list(chunk.keys())}")
                final_state.update(chunk)
            return final_state

        return self.graph.invoke(initial_state)