from typing import Dict, List
import json
from rich.console import Console

from . import FunctionSpace
from .ModelManager import ModelManager
from .AiProvider import AiProvider
from .AiPrompt import AiMessage, AiTextPart, AiCall, AiResult, AiPrompt


console = Console()
terminal_width = console.size.width


class AiGoogle(AiProvider):
    litellm_provider = "gemini"
    
    def prepare_request(self, messages: List[Dict]) -> Dict:
        request = {
            "contents": messages,
            "tools": [{"functionDeclarations": GoogleToolsArray}]
        }
        if self.system_message:
            request["system_instruction"] = {"parts": [{"text": self.system_message}]}
        return request

    def get_api_url(self) -> str:
        return f"https://generativelanguage.googleapis.com/v1beta/models/{self.prompt.model}:generateContent?key={self.prompt.api_key}"

    def get_headers(self) -> Dict:
        return {"Content-Type": "application/json"}

    def to_ai_message(self, response: Dict) -> AiMessage:
        candidates = response.get("candidates", [])
        if not candidates:
            raise Exception("No response candidates received from Google API")

        content = []
        for part in candidates[0]['content']["parts"]:
            if   "text" in part:            content.append(AiTextPart(vm=self.prompt.vm, text=part["text"]))
            elif "functionCall" in part:
                fc = part["functionCall"]
                content.append(AiCall(vm=self.prompt.vm,name=fc["name"],arguments=fc.get("args", {}),id=fc.get("id", "")))

        return AiMessage(vm=self.prompt.vm, role="assistant", content=content,
                        model_name=self.prompt.model, provider=self.prompt.provider)

    def to_company_messages(self, messages: List[AiMessage]) -> List[Dict]:
        google_messages = []

        for msg in messages:
            if msg.role == "system":
                self.system_message = msg.content[0].text if msg.content else None
                continue

            content = []
            for part in msg.content:
                if   part.type == "text":       content.append({"text": part.text})
                elif part.type == "image_url":  content.append({"inlineData": {"mimeType": part.media_type,"data": part.file_contents}})
                elif part.type == "call":       content.append({"functionCall": {"name": part.name,"args": part.arguments}})
                elif part.type == "result":     content.append({"functionResponse": {"name": part.name,"response": part.result,"id": part.id or ""}})
                else: raise Exception(f"Unknown part type: {part.type}")

            google_messages.append({"role": msg.role, "parts": content})

        return google_messages

    def extract_token_usage(self, response: Dict) -> tuple[int, int]:
        """Extract token usage from Google API response"""
        usage = response.get("usageMetadata", {})
        tokens_in = usage.get("promptTokenCount", 0)
        tokens_out = usage.get("candidatesTokenCount", 0)
        return tokens_in, tokens_out

    def calculate_costs(self, tokens_in: int, tokens_out: int) -> tuple[float, float]:
        """Calculate costs based on token usage and model pricing"""
        from .ModelManager import ModelManager
        
        try:
            model = ModelManager.get_model(self.prompt.model_lookup_key)
            cost_in = tokens_in * model.input_cost
            cost_out = tokens_out * model.output_cost
            return cost_in, cost_out
        except Exception:
            # Fallback to zero costs if model not found
            return 0.0, 0.0

    # def update_models(self) -> bool:
    #     """Update models from provider API - not yet implemented"""
    #     console.print("[yellow]Model updating not yet implemented for Google provider[/yellow]")
    #     return False


# Prepare Google tools array
GoogleToolsArray = [
    {
        "name": tool['function']['name'],
        "description": tool['function']['description'],
        "parameters": {k: v for k, v in tool['function']['parameters'].items() if k != 'additionalProperties'}
    }
    for tool in FunctionSpace.functions.tools_array
]

ModelManager.register_handler(provider_name="gemini", handler_class=AiGoogle)
