from typing import Annotated

# Import from vendor-specific modules
from .y_finance import (
    get_YFin_data_online,
    get_stock_stats_indicators_window,
    get_fundamentals as get_yfinance_fundamentals,
    get_balance_sheet as get_yfinance_balance_sheet,
    get_cashflow as get_yfinance_cashflow,
    get_income_statement as get_yfinance_income_statement,
    get_insider_transactions as get_yfinance_insider_transactions,
)
from .yfinance_news import get_news_yfinance, get_global_news_yfinance
from .alpha_vantage import (
    get_stock as get_alpha_vantage_stock,
    get_indicator as get_alpha_vantage_indicator,
    get_fundamentals as get_alpha_vantage_fundamentals,
    get_balance_sheet as get_alpha_vantage_balance_sheet,
    get_cashflow as get_alpha_vantage_cashflow,
    get_income_statement as get_alpha_vantage_income_statement,
    get_insider_transactions as get_alpha_vantage_insider_transactions,
    get_news as get_alpha_vantage_news,
    get_global_news as get_alpha_vantage_global_news,
)
from .alpha_vantage_common import AlphaVantageRateLimitError

# Market provider registry
from .market_registry import registry as market_registry, MARKET_METHOD_MAP

# Auto-discover and register market providers
from . import markets  # noqa: F401

# Configuration and routing logic
from .config import get_config

# Tools organized by category
TOOLS_CATEGORIES = {
    "core_stock_apis": {
        "description": "OHLCV stock price data",
        "tools": [
            "get_stock_data"
        ]
    },
    "technical_indicators": {
        "description": "Technical analysis indicators",
        "tools": [
            "get_indicators"
        ]
    },
    "fundamental_data": {
        "description": "Company fundamentals",
        "tools": [
            "get_fundamentals",
            "get_balance_sheet",
            "get_cashflow",
            "get_income_statement"
        ]
    },
    "news_data": {
        "description": "News and insider data",
        "tools": [
            "get_news",
            "get_global_news",
            "get_insider_transactions",
        ]
    }
}

VENDOR_LIST = [
    "yfinance",
    "alpha_vantage",
]

# Mapping of methods to their vendor-specific implementations
VENDOR_METHODS = {
    # core_stock_apis
    "get_stock_data": {
        "alpha_vantage": get_alpha_vantage_stock,
        "yfinance": get_YFin_data_online,
    },
    # technical_indicators
    "get_indicators": {
        "alpha_vantage": get_alpha_vantage_indicator,
        "yfinance": get_stock_stats_indicators_window,
    },
    # fundamental_data
    "get_fundamentals": {
        "alpha_vantage": get_alpha_vantage_fundamentals,
        "yfinance": get_yfinance_fundamentals,
    },
    "get_balance_sheet": {
        "alpha_vantage": get_alpha_vantage_balance_sheet,
        "yfinance": get_yfinance_balance_sheet,
    },
    "get_cashflow": {
        "alpha_vantage": get_alpha_vantage_cashflow,
        "yfinance": get_yfinance_cashflow,
    },
    "get_income_statement": {
        "alpha_vantage": get_alpha_vantage_income_statement,
        "yfinance": get_yfinance_income_statement,
    },
    # news_data
    "get_news": {
        "alpha_vantage": get_alpha_vantage_news,
        "yfinance": get_news_yfinance,
    },
    "get_global_news": {
        "yfinance": get_global_news_yfinance,
        "alpha_vantage": get_alpha_vantage_global_news,
    },
    "get_insider_transactions": {
        "alpha_vantage": get_alpha_vantage_insider_transactions,
        "yfinance": get_yfinance_insider_transactions,
    },
}


def _extract_ticker(method: str, args: tuple, kwargs: dict) -> str:
    """Extract the ticker/symbol from method arguments.

    Most data methods take ticker/symbol as the first positional argument.
    get_global_news is the exception — it has no ticker argument.
    """
    # Methods that don't have a ticker argument
    no_ticker_methods = {"get_global_news"}
    if method in no_ticker_methods:
        return None

    # First positional arg is the ticker/symbol for all other methods
    if args:
        return args[0]

    # Check common keyword names
    for key in ("symbol", "ticker"):
        if key in kwargs:
            return kwargs[key]

    return None


def get_category_for_method(method: str) -> str:
    """Get the category that contains the specified method."""
    for category, info in TOOLS_CATEGORIES.items():
        if method in info["tools"]:
            return category
    raise ValueError(f"Method '{method}' not found in any category")

def get_vendor(category: str, method: str = None) -> str:
    """Get the configured vendor for a data category or specific tool method.
    Tool-level configuration takes precedence over category-level.
    """
    config = get_config()

    # Check tool-level configuration first (if method provided)
    if method:
        tool_vendors = config.get("tool_vendors", {})
        if method in tool_vendors:
            return tool_vendors[method]

    # Fall back to category-level configuration
    return config.get("data_vendors", {}).get(category, "default")

def route_to_vendor(method: str, *args, **kwargs):
    """Route method calls to appropriate vendor implementation with fallback support.

    First checks if the ticker belongs to a registered non-US market (VN, TH, etc.).
    If so, delegates directly to that market's provider. Otherwise, uses the
    existing vendor routing (yfinance/alpha_vantage).
    """
    # --- Market provider check ---
    ticker = _extract_ticker(method, args, kwargs)
    market_code = None

    if ticker:
        market_code = market_registry.detect_market(ticker)
    elif method == "get_global_news":
        # For global news with no ticker, check config for explicit market
        config = get_config()
        market_setting = config.get("market", "auto")
        if market_setting not in ("auto", "US"):
            market_code = market_setting

    # If a market provider handles this method, delegate to it
    if market_code and method in MARKET_METHOD_MAP:
        return market_registry.call_market_method(market_code, method, *args, **kwargs)

    # --- Default vendor routing (US / yfinance / alpha_vantage) ---
    category = get_category_for_method(method)
    vendor_config = get_vendor(category, method)
    primary_vendors = [v.strip() for v in vendor_config.split(',')]

    if method not in VENDOR_METHODS:
        raise ValueError(f"Method '{method}' not supported")

    # Build fallback chain: primary vendors first, then remaining available vendors
    all_available_vendors = list(VENDOR_METHODS[method].keys())
    fallback_vendors = primary_vendors.copy()
    for vendor in all_available_vendors:
        if vendor not in fallback_vendors:
            fallback_vendors.append(vendor)

    for vendor in fallback_vendors:
        if vendor not in VENDOR_METHODS[method]:
            continue

        vendor_impl = VENDOR_METHODS[method][vendor]
        impl_func = vendor_impl[0] if isinstance(vendor_impl, list) else vendor_impl

        try:
            return impl_func(*args, **kwargs)
        except AlphaVantageRateLimitError:
            continue  # Only rate limits trigger fallback

    raise RuntimeError(f"No available vendor for '{method}'")