import asyncio
from aiogram import F
from aiogram.types import Message, CallbackQuery, InlineKeyboardMarkup, InlineKeyboardButton
from app import dp, cfg
from auth import is_admin_msg
from keyboards import system_kb
from system_checks import security, disks, hardware
from services.http_checks import get_url_checks, check_url
from services.queue import enqueue
from services.updates import list_updates, apply_updates
from services.runner import run_cmd
import state
from state import UPDATES_CACHE, REBOOT_PENDING
from services.metrics import summarize


@dp.message(F.text == "💽 Disks")
async def sd(msg: Message):
    if is_admin_msg(msg):
        await msg.answer(disks(), reply_markup=system_kb)


@dp.message(F.text == "🔐 Security")
async def sec(msg: Message):
    if is_admin_msg(msg):
        await msg.answer(security(), reply_markup=system_kb)


@dp.message(F.text == "🌐 URLs")
async def urls(msg: Message):
    if not is_admin_msg(msg):
        return

    checks = list(get_url_checks(cfg))
    if not checks:
        await msg.answer("⚠️ Нет URL для проверки", reply_markup=system_kb)
        return

    await msg.answer("⏳ Проверяю URL…", reply_markup=system_kb)

    async def worker():
        tasks = [asyncio.to_thread(check_url, url) for _, url in checks]
        results = await asyncio.gather(*tasks)

        lines = ["🌐 URLs\n"]
        for (alias, _url), (ok, status, ms, err) in zip(checks, results):
            if ok:
                lines.append(f"🟢 {alias}: {status} ({ms}ms)")
            elif status is not None:
                lines.append(f"🔴 {alias}: {status} ({ms}ms)")
            else:
                reason = err or "error"
                lines.append(f"🔴 {alias}: {reason} ({ms}ms)")

        await msg.answer("\n".join(lines), reply_markup=system_kb)

    asyncio.create_task(worker())


@dp.message(F.text == "📈 Metrics")
async def metrics(msg: Message):
    if not is_admin_msg(msg):
        return
    if state.METRICS_STORE is None:
        await msg.answer("⚠️ Metrics not initialized", reply_markup=system_kb)
        return
    await msg.answer(summarize(state.METRICS_STORE, minutes=15), reply_markup=system_kb)


@dp.message(F.text == "📦 Updates")
async def updates_list(msg: Message):
    if not is_admin_msg(msg):
        return

    async def job():
        title, lines = await list_updates()
        UPDATES_CACHE[msg.from_user.id] = {
            "title": title,
            "lines": lines,
            "page_size": 20,
        }
        await send_updates_page(msg, msg.from_user.id, 0, edit=False)

    pos = await enqueue("pkg-updates", job)
    await msg.answer(f"🕓 Updates queued (#{pos})", reply_markup=system_kb)


@dp.message(F.text == "⬆️ Upgrade")
async def updates_apply(msg: Message):
    if not is_admin_msg(msg):
        return

    kb = InlineKeyboardMarkup(
        inline_keyboard=[[
            InlineKeyboardButton(text="✅ Confirm", callback_data="upgrade:confirm"),
            InlineKeyboardButton(text="✖ Cancel", callback_data="upgrade:cancel"),
        ]]
    )
    await msg.answer("⚠️ Confirm package upgrade?", reply_markup=kb)


@dp.message(F.text == "🔄 Reboot")
async def reboot_request(msg: Message):
    if not is_admin_msg(msg):
        return

    kb = InlineKeyboardMarkup(
        inline_keyboard=[[
            InlineKeyboardButton(text="✅ Confirm", callback_data="reboot:confirm"),
            InlineKeyboardButton(text="✖ Cancel", callback_data="reboot:cancel"),
        ]]
    )
    await msg.answer("⚠️ Confirm reboot?", reply_markup=kb)


@dp.message(F.text == "🧱 Hardware")
async def hw(msg: Message):
    if is_admin_msg(msg):
        await msg.answer(hardware(), reply_markup=system_kb)


def _updates_kb(page: int, total_pages: int) -> InlineKeyboardMarkup:
    buttons = []
    if total_pages > 1:
        row = []
        if page > 0:
            row.append(InlineKeyboardButton(text="⬅️ Prev", callback_data=f"updpage:{page-1}"))
        if page < total_pages - 1:
            row.append(InlineKeyboardButton(text="Next ➡️", callback_data=f"updpage:{page+1}"))
        if row:
            buttons.append(row)
    return InlineKeyboardMarkup(inline_keyboard=buttons)


async def send_updates_page(msg: Message, user_id: int, page: int, edit: bool):
    data = UPDATES_CACHE.get(user_id)
    if not data:
        await msg.answer("⚠️ Updates cache empty", reply_markup=system_kb)
        return

    lines = data["lines"]
    page_size = data["page_size"]
    total_pages = max(1, (len(lines) + page_size - 1) // page_size)
    page = max(0, min(page, total_pages - 1))
    start = page * page_size
    end = start + page_size
    body = "\n".join(lines[start:end])

    text = f"{data['title']} (page {page+1}/{total_pages})\n```\n{body}\n```"
    if edit:
        await msg.edit_text(text, reply_markup=_updates_kb(page, total_pages), parse_mode="Markdown")
    else:
        await msg.answer(text, reply_markup=_updates_kb(page, total_pages), parse_mode="Markdown")


@dp.callback_query(F.data.startswith("updpage:"))
async def updates_page(cb: CallbackQuery):
    if cb.from_user.id not in UPDATES_CACHE:
        await cb.answer("No cached updates")
        return
    try:
        page = int(cb.data.split(":", 1)[1])
    except ValueError:
        await cb.answer("Bad page")
        return
    await cb.answer()
    await send_updates_page(cb.message, cb.from_user.id, page, edit=True)


@dp.callback_query(F.data == "upgrade:confirm")
async def upgrade_confirm(cb: CallbackQuery):
    if cb.from_user.id != cfg["telegram"]["admin_id"]:
        return
    await cb.answer()

    async def job():
        text = await apply_updates()
        await cb.message.answer(text, reply_markup=system_kb, parse_mode="Markdown")

    pos = await enqueue("pkg-upgrade", job)
    await cb.message.answer(f"🕓 Upgrade queued (#{pos})", reply_markup=system_kb)


@dp.callback_query(F.data == "upgrade:cancel")
async def upgrade_cancel(cb: CallbackQuery):
    await cb.answer("Cancelled")
    await cb.message.delete()


@dp.callback_query(F.data == "reboot:confirm")
async def reboot_confirm(cb: CallbackQuery):
    if cb.from_user.id != cfg["telegram"]["admin_id"]:
        return
    await cb.answer()
    REBOOT_PENDING[cb.from_user.id] = {}
    await cb.message.answer("🔐 Send reboot password", reply_markup=system_kb)


@dp.callback_query(F.data == "reboot:cancel")
async def reboot_cancel(cb: CallbackQuery):
    await cb.answer("Cancelled")
    await cb.message.delete()


@dp.message(F.text, F.func(lambda msg: msg.from_user and msg.from_user.id in REBOOT_PENDING))
async def reboot_password(msg: Message):
    if not is_admin_msg(msg):
        return
    REBOOT_PENDING.pop(msg.from_user.id, None)

    expected = cfg.get("security", {}).get("reboot_password")
    if not expected:
        await msg.answer("⚠️ Reboot password not configured", reply_markup=system_kb)
        return

    if (msg.text or "").strip() != expected:
        await msg.answer("❌ Wrong password", reply_markup=system_kb)
        return

    async def job():
        await msg.answer("🔄 Rebooting…", reply_markup=system_kb)
        await run_cmd(["sudo", "reboot"], timeout=10)

    pos = await enqueue("reboot", job)
    await msg.answer(f"🕓 Reboot queued (#{pos})", reply_markup=system_kb)