import json
from typing import List, Dict, Any, Tuple
from datetime import datetime

from app.db import database
from app.tools.definitions import TOOLS_SCHEMA
from app.tools.handlers import handle_tool_call, get_system_capabilities_text
from app.core.ollama_client import send_ollama_request

def process_chat_message(user_message: str, chat_history: List[Dict[str, Any]] = None) -> Tuple[str, List[Dict[str, Any]]]:
    if chat_history is None:
        chat_history = []

    current_now = datetime.now().strftime("%Y-%m-%d %H:%M")
    user_clean = user_message.replace("\xa0", " ").strip()
    user_lower = user_clean.lower()

    # 1. Жесткий перехват: Помощь и варианты команд (чистый Plain Text без Markdown)
    if any(phrase in user_lower for phrase in ["помощь", "возможности", "что ты умеешь", "помощь в общении", "варианты команд"]):
        formatted_text = get_system_capabilities_text()
        updated_history = chat_history + [
            {"role": "user", "content": user_message},
            {"role": "assistant", "content": formatted_text}
        ]
        return formatted_text, updated_history

    # 2. Жесткий перехват: Системный промпт из БД
    if any(phrase in user_lower for phrase in ["системный промпт", "покажи промпт", "промпт системы", "промпт из базы"]):
        prompt_text = database.db_get_active_system_prompt()
        formatted_text = f"⚙️ Актуальный системный промпт ИИ (из базы SQLite):\n\n{prompt_text}"
        updated_history = chat_history + [
            {"role": "user", "content": user_message},
            {"role": "assistant", "content": formatted_text}
        ]
        return formatted_text, updated_history

    # 3. Жесткий перехват: База знаний из БД
    if any(phrase in user_lower for phrase in ["базу знаний", "база знаний", "покажи правила", "инструкции ии"]):
        rules = database.db_get_rules()
        if not rules:
            formatted_text = "База знаний пуста."
        else:
            formatted_text = "🧠 База знаний ИИ (ai_knowledge_base):\n\n"
            for r in rules:
                formatted_text += f"{r.get('id')}. {r.get('rule_text')}\n\n"

        updated_history = chat_history + [
            {"role": "user", "content": user_message},
            {"role": "assistant", "content": formatted_text}
        ]
        return formatted_text, updated_history

    # Динамическая подгрузка системного промпта из БД SQLite
    dynamic_prompt_text = database.db_get_active_system_prompt()
    system_prompt = {
        "role": "system",
        "content": f"Текущая дата и время сервера: {current_now}.\n\n{dynamic_prompt_text}"
    }

    messages = [system_prompt] + chat_history + [{"role": "user", "content": user_message}]

    try:
        res_data = send_ollama_request(messages=messages, tools=TOOLS_SCHEMA)
        msg = res_data.get("message", {})

        tool_calls = msg.get("tool_calls", [])
        content_str = msg.get("content", "").strip().replace("**", "").replace("```", "").replace("###", "")

        # Перехват текстового JSON с именем функции
        if not tool_calls and "name" in content_str and "db_" in content_str:
            try:
                start_idx = content_str.find("{")
                end_idx = content_str.rfind("}") + 1
                if start_idx != -1 and end_idx != -1:
                    parsed = json.loads(content_str[start_idx:end_idx])
                    if "name" in parsed:
                        tool_calls = [{"function": parsed}]
            except Exception:
                pass

        if tool_calls:
            for tool in tool_calls:
                fn_name = tool["function"]["name"]
                fn_args = tool["function"].get("arguments", {})
                
                formatted_text = handle_tool_call(fn_name, fn_args)
                
                updated_history = chat_history + [
                    {"role": "user", "content": user_message},
                    {"role": "assistant", "content": formatted_text}
                ]
                return formatted_text, updated_history

        updated_history = chat_history + [
            {"role": "user", "content": user_message},
            {"role": "assistant", "content": content_str}
        ]
        return content_str, updated_history

    except Exception as e:
        return f"Ошибка обработки запроса: {e}", chat_history