"""HTTP client for communicating with the Village Simulation backend."""

import time
from dataclasses import dataclass
from typing import Optional, Any

import requests
from requests.exceptions import RequestException


@dataclass
class SimulationState:
    """Parsed simulation state from the API."""
    turn: int
    day: int
    step_in_day: int
    time_of_day: str
    world_width: int
    world_height: int
    agents: list[dict]
    market_orders: list[dict]
    market_prices: dict
    statistics: dict
    mode: str
    is_running: bool
    recent_logs: list[dict]
    
    @classmethod
    def from_api_response(cls, data: dict) -> "SimulationState":
        """Create from API response data."""
        return cls(
            turn=data.get("turn", 0),
            day=data.get("day", 1),
            step_in_day=data.get("step_in_day", 0),
            time_of_day=data.get("time_of_day", "day"),
            world_width=data.get("world_size", {}).get("width", 20),
            world_height=data.get("world_size", {}).get("height", 20),
            agents=data.get("agents", []),
            market_orders=data.get("market", {}).get("orders", []),
            market_prices=data.get("market", {}).get("prices", {}),
            statistics=data.get("statistics", {}),
            mode=data.get("mode", "manual"),
            is_running=data.get("is_running", False),
            recent_logs=data.get("recent_logs", []),
        )
    
    def get_living_agents(self) -> list[dict]:
        """Get only living agents."""
        return [a for a in self.agents if a.get("is_alive", False)]


class SimulationClient:
    """HTTP client for the Village Simulation backend."""
    
    def __init__(self, base_url: str = "http://localhost:8000"):
        self.base_url = base_url.rstrip("/")
        self.api_url = f"{self.base_url}/api"
        self.session = requests.Session()
        self.last_state: Optional[SimulationState] = None
        self.connected = False
        self._retry_count = 0
        self._max_retries = 3
    
    def _request(
        self,
        method: str,
        endpoint: str,
        json: Optional[dict] = None,
        timeout: float = 5.0,
    ) -> Optional[dict]:
        """Make an HTTP request to the API."""
        url = f"{self.api_url}{endpoint}"
        
        try:
            response = self.session.request(
                method=method,
                url=url,
                json=json,
                timeout=timeout,
            )
            response.raise_for_status()
            self.connected = True
            self._retry_count = 0
            return response.json()
        except RequestException as e:
            self._retry_count += 1
            if self._retry_count >= self._max_retries:
                self.connected = False
            return None
    
    def check_connection(self) -> bool:
        """Check if the backend is reachable."""
        try:
            response = self.session.get(
                f"{self.base_url}/health",
                timeout=2.0,
            )
            self.connected = response.status_code == 200
            return self.connected
        except RequestException:
            self.connected = False
            return False
    
    def get_state(self) -> Optional[SimulationState]:
        """Fetch the current simulation state."""
        data = self._request("GET", "/state")
        if data:
            self.last_state = SimulationState.from_api_response(data)
            return self.last_state
        return self.last_state  # Return cached state if request failed
    
    def advance_turn(self) -> bool:
        """Advance the simulation by one step."""
        result = self._request("POST", "/control/next_step")
        return result is not None and result.get("success", False)
    
    def set_mode(self, mode: str) -> bool:
        """Set the simulation mode ('manual' or 'auto')."""
        result = self._request("POST", "/control/mode", json={"mode": mode})
        return result is not None and result.get("success", False)
    
    def initialize(
        self,
        num_agents: int = 8,
        world_width: int = 20,
        world_height: int = 20,
    ) -> bool:
        """Initialize or reset the simulation."""
        result = self._request("POST", "/control/initialize", json={
            "num_agents": num_agents,
            "world_width": world_width,
            "world_height": world_height,
        })
        return result is not None and result.get("success", False)
    
    def get_status(self) -> Optional[dict]:
        """Get simulation status."""
        return self._request("GET", "/control/status")
    
    def get_agents(self) -> Optional[list[dict]]:
        """Get all agents."""
        result = self._request("GET", "/agents")
        if result:
            return result.get("agents", [])
        return None
    
    def get_market_orders(self) -> Optional[list[dict]]:
        """Get all market orders."""
        result = self._request("GET", "/market/orders")
        if result:
            return result.get("orders", [])
        return None
    
    def get_market_prices(self) -> Optional[dict]:
        """Get market prices."""
        return self._request("GET", "/market/prices")
    
    def wait_for_connection(self, timeout: float = 30.0) -> bool:
        """Wait for backend connection with timeout."""
        start = time.time()
        while time.time() - start < timeout:
            if self.check_connection():
                return True
            time.sleep(0.5)
        return False
    
    def get_config(self) -> Optional[dict]:
        """Get current simulation configuration."""
        return self._request("GET", "/config")
    
    def update_config(self, config_data: dict) -> bool:
        """Update simulation configuration."""
        result = self._request("POST", "/config", json=config_data)
        return result is not None and result.get("success", False)
    
    def reset_config(self) -> bool:
        """Reset configuration to defaults."""
        result = self._request("POST", "/config/reset")
        return result is not None and result.get("success", False)