"""
Core TIPM Model Implementation
=============================

Main orchestrator for the Tariff Impact Propagation Model
"""

from typing import Dict, List, Any, Optional
import logging
from dataclasses import dataclass
from dataclasses import dataclass
from typing import Dict, List, Optional, Set
from datetime import datetime


@dataclass
class EnhancedCountryData:
    """Enhanced country data structure for v1.5 with authoritative classifications"""

    # Core identification
    name: str
    iso_alpha_2: str
    iso_alpha_3: str
    un_code: str
    # Trade & Economic Data
    tariff_rate: float
    bilateral_trade_usd: float
    gdp_usd: float
    gdp_per_capita: float
    # Geographic Classification
    continent: str
    region: str
    income_group: str
    # Global Organization Memberships
    global_groups: Set[str]
    trade_agreements: Set[str]
    currency_bloc: Optional[str]
    # New Economic Categories (v1.5)
    emerging_market_status: bool
    tech_manufacturing_rank: Optional[int]
    supply_chain_critical: bool
    # Resource Export Classifications
    mining_resource_exports: List[str]
    agricultural_exports: List[str]
    strategic_commodities: List[str]
    # Data Provenance (v1.5 requirement)
    data_sources: Dict[str, str]
    last_updated: datetime
    confidence_level: str

    def validate(self) -> bool:
        """Validate country data fields and bounds."""
        if not 0 <= self.tariff_rate <= 100:
            raise ValueError(
                f"Invalid tariff_rate for {self.name}: {self.tariff_rate}%. Must be 0-100%"
            )
        if self.gdp_usd < 0:
            raise ValueError(f"Negative GDP for {self.name}: {self.gdp_usd}")
        if self.gdp_per_capita < 0:
            raise ValueError(
                f"Negative GDP per capita for {self.name}: {self.gdp_per_capita}"
            )
        return True


# Placeholder for country database loader and validation framework
# To be implemented in next steps
import pandas as pd

from .layers.policy_trigger import PolicyTriggerLayer
from .layers.trade_flow import TradeFlowLayer
from .layers.industry_response import IndustryResponseLayer
from .layers.firm_impact import FirmImpactLayer
from .layers.consumer_impact import ConsumerImpactLayer
from .layers.geopolitical import GeopoliticalLayer
from .config.settings import (
    TIPMConfig,
    PolicyLayerConfig,
    TradeFlowConfig,
    IndustryConfig,
    FirmConfig,
    ConsumerConfig,
    GeopoliticalConfig,
)


@dataclass
@dataclass
class TariffShock:
    """Represents a tariff policy change"""

    tariff_id: str
    hs_codes: List[str]
    rate_change: float
    origin_country: str
    destination_country: str
    effective_date: str
    policy_text: str


@dataclass
class TIPMPrediction:
    """Model prediction output structure"""

    tariff_shock: TariffShock
    trade_flow_impact: Dict[str, Any]
    industry_response: Dict[str, Any]
    firm_impact: Dict[str, Any]
    consumer_impact: Dict[str, Any]
    geopolitical_impact: Dict[str, Any]
    confidence_scores: Dict[str, float]


class TIPMModel:
    """
    Main TIPM Model Class

    Orchestrates the 6-layer architecture for tariff impact prediction:
    1. Policy Trigger Input (tariff shock processing)
    2. Upstream Trade Flow Modeling
    3. Industry-Level Economic Response
    4. Firm-Level & Employment Impact
    5. Consumer Market Impact
    6. Geopolitical & Social Feedback
    """

    def __init__(self, config: Optional[TIPMConfig] = None):
        """Initialize TIPM model with configuration"""
        self.config = config or TIPMConfig()
        self.logger = logging.getLogger(__name__)

        # Initialize model layers
        self._initialize_layers()

        # Model state
        self.is_trained = False
        self.model_metadata = {}

    def _initialize_layers(self):
        """Initialize all 6 model layers"""
        # Use default configs if none provided
        policy_config = self.config.policy_config or PolicyLayerConfig()
        trade_flow_config = self.config.trade_flow_config or TradeFlowConfig()
        industry_config = self.config.industry_config or IndustryConfig()
        firm_config = self.config.firm_config or FirmConfig()
        consumer_config = self.config.consumer_config or ConsumerConfig()
        geopolitical_config = self.config.geopolitical_config or GeopoliticalConfig()

        self.policy_layer = PolicyTriggerLayer(policy_config)
        self.trade_flow_layer = TradeFlowLayer(trade_flow_config)
        self.industry_layer = IndustryResponseLayer(industry_config)
        self.firm_layer = FirmImpactLayer(firm_config)
        self.consumer_layer = ConsumerImpactLayer(consumer_config)
        self.geopolitical_layer = GeopoliticalLayer(geopolitical_config)

        self.logger.info("TIPM model layers initialized successfully")

    def fit(self, training_data: Dict[str, pd.DataFrame]) -> "TIPMModel":
        """
        Train the TIPM model on historical data

        Args:
            training_data: Dictionary containing training datasets for each layer
                - 'tariff_shocks': Historical tariff policy changes
                - 'trade_flows': Historical trade flow data
                - 'industry_responses': Industry-level response data
                - 'firm_responses': Firm-level response data
                - 'consumer_impacts': Consumer market impact data
                - 'geopolitical_events': Social/political response data
        """
        self.logger.info("Starting TIPM model training...")

        # Train each layer sequentially
        self.policy_layer.fit(training_data.get("tariff_shocks"))
        self.trade_flow_layer.fit(training_data.get("trade_flows"))
        self.industry_layer.fit(training_data.get("industry_responses"))
        self.firm_layer.fit(training_data.get("firm_responses"))
        self.consumer_layer.fit(training_data.get("consumer_impacts"))
        self.geopolitical_layer.fit(training_data.get("geopolitical_events"))

        self.is_trained = True
        self.logger.info("TIPM model training completed")

        return self

    def predict(self, tariff_shock: TariffShock) -> TIPMPrediction:
        """
        Predict tariff impact propagation through all layers

        Args:
            tariff_shock: Tariff policy change to analyze

        Returns:
            TIPMPrediction: Comprehensive impact prediction
        """
        if not self.is_trained:
            raise ValueError("Model must be trained before making predictions")

        self.logger.info(
            f"Predicting impact for tariff shock: {tariff_shock.tariff_id}"
        )

        # Layer 1: Process policy trigger
        policy_features = self.policy_layer.transform(tariff_shock)

        # Layer 2: Trade flow impact
        trade_impact = self.trade_flow_layer.predict(policy_features)

        # Layer 3: Industry response
        industry_impact = self.industry_layer.predict(trade_impact)

        # Layer 4: Firm-level impact
        firm_impact = self.firm_layer.predict(industry_impact)

        # Layer 5: Consumer impact
        consumer_impact = self.consumer_layer.predict(firm_impact)

        # Layer 6: Geopolitical feedback
        geopolitical_impact = self.geopolitical_layer.predict(consumer_impact)

        # Calculate confidence scores
        confidence_scores = self._calculate_confidence_scores(
            policy_features,
            trade_impact,
            industry_impact,
            firm_impact,
            consumer_impact,
            geopolitical_impact,
        )

        return TIPMPrediction(
            tariff_shock=tariff_shock,
            trade_flow_impact=trade_impact,
            industry_response=industry_impact,
            firm_impact=firm_impact,
            consumer_impact=consumer_impact,
            geopolitical_impact=geopolitical_impact,
            confidence_scores=confidence_scores,
        )

    def _calculate_confidence_scores(self, *layer_outputs) -> Dict[str, float]:
        """Calculate prediction confidence scores for each layer"""
        # Implementation placeholder - would calculate based on model uncertainties
        return {
            "policy_confidence": 0.85,
            "trade_flow_confidence": 0.78,
            "industry_confidence": 0.82,
            "firm_confidence": 0.73,
            "consumer_confidence": 0.79,
            "geopolitical_confidence": 0.65,
            "overall_confidence": 0.77,
        }

    def simulate_scenario(
        self, tariff_shocks: List[TariffShock], time_horizon: int = 12
    ) -> Dict[str, Any]:
        """
        Run scenario simulation with multiple tariff shocks over time

        Args:
            tariff_shocks: List of tariff policy changes
            time_horizon: Simulation time horizon in months

        Returns:
            Dictionary containing simulation results
        """
        self.logger.info(
            f"Running scenario simulation with {len(tariff_shocks)} shocks"
        )

        scenario_results = {
            "timeline": [],
            "cumulative_impacts": {},
            "country_impacts": {},
            "sector_impacts": {},
        }

        for shock in tariff_shocks:
            prediction = self.predict(shock)
            scenario_results["timeline"].append(
                {"shock": shock, "prediction": prediction}
            )

        return scenario_results

    def get_country_exposure(self, country_code: str) -> Dict[str, Any]:
        """
        Get tariff exposure profile for a specific country

        Args:
            country_code: ISO country code (e.g., 'SG', 'US', 'CN')

        Returns:
            Dictionary containing country-specific exposure metrics
        """
        # Implementation would analyze country's trade dependencies
        # and vulnerability to different types of tariff shocks
        return {
            "import_dependency": {},
            "export_exposure": {},
            "supply_chain_vulnerability": {},
            "economic_resilience": {},
        }