import json
import urllib.request
import urllib.error
from typing import List, Dict, Any, Tuple
from datetime import datetime

from .db_tools import (
    db_get_active_system_prompt,
    db_add_system_prompt,
    db_get_tasks,
    db_update_task_status,
    db_delete_task,
    db_add_task,
    db_get_rules
)
from .schemas import TOOLS_SCHEMA

OLLAMA_URL = "http://192.168.11.3:11434/api/chat"
MODEL_NAME = "qwen2.5:14b"

def process_chat_message(user_id: int, 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_lower = user_message.lower().strip()

    # Быстрый прямой ответ для списка задач текущего пользователя
    if any(phrase in user_lower for phrase in ["все задачи", "покажи задачи", "список задач", "реестр задач"]):
        tasks = db_get_tasks(user_id)
        if not tasks:
            formatted_text = "Ваш список задач пуст."
        else:
            def get_task_num(t):
                tid = str(t.get("task_id", ""))
                try:
                    return int(tid.upper().replace("TASK-", "").strip())
                except ValueError:
                    return 0

            tasks_sorted = sorted(tasks, key=get_task_num, reverse=True)
            lines = [f"📋 Ваш реестр задач ({len(tasks_sorted)}):\n"]
            for t in tasks_sorted:
                tid = t.get('task_id', '')
                title = t.get('title', 'Без названия')
                lines.append(f"• {tid}: {title}")
            formatted_text = "\n".join(lines)

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

    if any(phrase in user_lower for phrase in ["системный промпт", "покажи промпт", "промпт системы"]):
        prompt_text = db_get_active_system_prompt()
        formatted_text = f"⚙️ Актуальный системный промпт ИИ:\n\n{prompt_text}"
        return formatted_text, chat_history + [{"role": "user", "content": user_message}, {"role": "assistant", "content": formatted_text}]

    dynamic_prompt_text = 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}]

    payload = {
        "model": MODEL_NAME,
        "messages": messages,
        "tools": TOOLS_SCHEMA,
        "stream": False,
        "options": {"num_predict": 2048, "num_ctx": 8192, "temperature": 0.1}
    }

    req = urllib.request.Request(
        OLLAMA_URL,
        data=json.dumps(payload).encode("utf-8"),
        headers={"Content-Type": "application/json"}
    )

    try:
        with urllib.request.urlopen(req) as response:
            res_data = json.loads(response.read().decode("utf-8"))
            msg = res_data.get("message", {})
            tool_calls = msg.get("tool_calls", [])
            content_str = msg.get("content", "").strip().replace("**", "")

            if tool_calls:
                for tool in tool_calls:
                    fn_name = tool["function"]["name"]
                    fn_args = tool["function"].get("arguments", {})

                    if fn_name == "db_get_tasks":
                        tasks = db_get_tasks(user_id)
                        if not tasks:
                            formatted_text = "Ваш список задач пуст."
                        else:
                            def get_task_num(t):
                                tid = str(t.get("task_id", ""))
                                try:
                                    return int(tid.upper().replace("TASK-", "").strip())
                                except ValueError:
                                    return 0

                            tasks_sorted = sorted(tasks, key=get_task_num, reverse=True)
                            lines = [f"📋 Ваш реестр задач ({len(tasks_sorted)}):\n"]
                            for t in tasks_sorted:
                                tid = t.get('task_id', '')
                                title = t.get('title', 'Без названия')
                                lines.append(f"• {tid}: {title}")
                            formatted_text = "\n".join(lines)

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

                    elif fn_name == "db_add_task":
                        res = db_add_task(user_id=user_id, module=fn_args.get("module", "general"), title=fn_args.get("title"), priority=fn_args.get("priority", "MEDIUM"), due_date=fn_args.get("due_date"))
                        formatted_text = f"[✓] Задача {res.get('task_id', 'TASK')} успешно создана!" if "status" in res else f"❌ Ошибка: {res.get('error')}"
                        return formatted_text, chat_history + [{"role": "user", "content": user_message}, {"role": "assistant", "content": formatted_text}]

                    elif fn_name == "db_update_task_status":
                        res = db_update_task_status(user_id=user_id, task_id=fn_args.get("task_id"), status=fn_args.get("status"), due_date=fn_args.get("due_date"))
                        formatted_text = f"[✓] Статус задачи {fn_args.get('task_id')} обновлен!" if "status" in res else f"❌ Ошибка: {res.get('error')}"
                        return formatted_text, chat_history + [{"role": "user", "content": user_message}, {"role": "assistant", "content": formatted_text}]

                    elif fn_name == "db_delete_task":
                        task_id_to_del = fn_args.get("task_id", "").upper()
                        res = db_delete_task(user_id=user_id, task_id=task_id_to_del)
                        formatted_text = f"[✓] Задача {task_id_to_del} успешно удалена из вашей базы!" if "status" in res else f"❌ Ошибка: {res.get('error')}"
                        return formatted_text, chat_history + [{"role": "user", "content": user_message}, {"role": "assistant", "content": formatted_text}]

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

    except urllib.error.URLError as e:
        return f"Ошибка связи с Ollama ({OLLAMA_URL}): {e}", chat_history