import os

from aiogram import F, Router
from aiogram.exceptions import TelegramBadRequest
from aiogram.fsm.context import FSMContext
from aiogram.types import CallbackQuery
from sqlalchemy.ext.asyncio import AsyncSession

from filters.admin import IsAdminFilter
from handlers.admin.panel.keyboard import AdminPanelCallback
from utils.modules_manager import manager

from .keyboard import build_module_menu_kb, build_modules_kb


router = Router()


def list_installed_modules() -> list[tuple[str, str | None]]:
    base = "modules"
    if not os.path.isdir(base):
        return []
    items: list[tuple[str, str | None]] = []
    for name in sorted(os.listdir(base)):
        path = os.path.join(base, name)
        if os.path.isdir(path) and not name.startswith("."):
            ver = None
            vp = os.path.join(path, "VERSION")
            if os.path.isfile(vp):
                try:
                    with open(vp, encoding="utf-8") as f:
                        for line in f:
                            line = line.strip()
                            if line:
                                ver = line
                                break
                except Exception:
                    ver = None
            items.append((name, ver))
    return items


@router.callback_query(AdminPanelCallback.filter(F.action == "modules"), IsAdminFilter())
async def handle_modules(callback_query: CallbackQuery, state: FSMContext, session: AsyncSession):
    await state.clear()

    packed = AdminPanelCallback.unpack(callback_query.data)
    page = max(1, packed.page or 1)

    all_items = list_installed_modules()
    items = [(n, v) for n, v in all_items if n != "web_admin_panel"]

    per_page = 12
    total_pages = max(1, (len(items) + per_page - 1) // per_page)
    page = min(page, total_pages)
    start = (page - 1) * per_page
    chunk = items[start : start + per_page]

    if chunk:

        def fmt(n, v):
            return f"{n} v{v}" if v else n

        lines = "\n".join(f"• {fmt(n, v)}" for n, v in chunk)
        text = f"🧩 Мои модули\n\nНайдено: {len(items)}\n<blockquote>{lines}</blockquote>"
    else:
        text = "🧩 Мои модули\n\nМодулей не найдено."

    markup = build_modules_kb(page, total_pages, chunk)
    try:
        await callback_query.message.edit_text(text=text, reply_markup=markup, disable_web_page_preview=True)
    except TelegramBadRequest as e:
        if "message is not modified" in str(e).lower():
            try:
                await callback_query.message.edit_reply_markup(reply_markup=None)
                await callback_query.message.edit_text(text=text, reply_markup=markup, disable_web_page_preview=True)
            except TelegramBadRequest:
                pass
        else:
            raise
    finally:
        await callback_query.answer()


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("module_restart__")), IsAdminFilter())
async def handle_module_restart(callback_query: CallbackQuery, state: FSMContext, session: AsyncSession):
    await state.clear()

    packed = AdminPanelCallback.unpack(callback_query.data)
    action = packed.action
    page = packed.page or 1
    name = action.split("module_restart__", 1)[-1]

    try:
        await manager.restart(name)
        result = "✅ Модуль перезапущен."
    except Exception as e:
        result = f"❌ Ошибка перезапуска: {e}"

    items = dict(list_installed_modules())
    ver = items.get(name)
    title = f"{name} v{ver}" if ver else name
    text = f"🧩 Модуль: <b>{title}</b>\n\n{result}"

    markup = build_module_menu_kb(name, page)
    try:
        await callback_query.message.edit_text(text=text, reply_markup=markup, disable_web_page_preview=True)
    except TelegramBadRequest as e:
        if "message is not modified" in str(e).lower():
            return
        raise


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("module_stop__")), IsAdminFilter())
async def handle_module_stop(callback_query: CallbackQuery, state: FSMContext, session: AsyncSession):
    await state.clear()

    packed = AdminPanelCallback.unpack(callback_query.data)
    action = packed.action
    page = packed.page or 1
    name = action.split("module_stop__", 1)[-1]

    try:
        await manager.stop(name)
        result = "🛑 Модуль остановлен."
    except Exception as e:
        result = f"❌ Ошибка остановки: {e}"

    items = dict(list_installed_modules())
    ver = items.get(name)
    title = f"{name} v{ver}" if ver else name
    text = f"🧩 Модуль: <b>{title}</b>\n\n{result}"

    markup = build_module_menu_kb(name, page)
    try:
        await callback_query.message.edit_text(text=text, reply_markup=markup, disable_web_page_preview=True)
    except TelegramBadRequest as e:
        if "message is not modified" in str(e).lower():
            return
        raise


@router.callback_query(AdminPanelCallback.filter(F.action.startswith("module_start__")), IsAdminFilter())
async def handle_module_start(callback_query: CallbackQuery, state: FSMContext, session: AsyncSession):
    await state.clear()

    packed = AdminPanelCallback.unpack(callback_query.data)
    action = packed.action
    page = packed.page or 1
    name = action.split("module_start__", 1)[-1]

    try:
        await manager.start(name)
        result = "▶️ Модуль запущен."
    except Exception as e:
        result = f"❌ Ошибка запуска: {e}"

    items = dict(list_installed_modules())
    ver = items.get(name)
    title = f"{name} v{ver}" if ver else name
    text = f"🧩 Модуль: <b>{title}</b>\n\n{result}"

    markup = build_module_menu_kb(name, page)
    try:
        await callback_query.message.edit_text(text=text, reply_markup=markup, disable_web_page_preview=True)
    except TelegramBadRequest as e:
        if "message is not modified" in str(e).lower():
            return
        raise