import asyncio
import json
from datetime import datetime
from aiogram import F
from aiogram.types import Message, InlineKeyboardMarkup, InlineKeyboardButton
from app import dp
from auth import is_admin_msg
from keyboards import backup_kb
from lock_utils import acquire_lock, release_lock
from services.backup import backup_badge, last_backup, restore_help
from services.runner import run_cmd


async def cmd_repo_stats(msg: Message):
    await msg.answer("⏳ Loading repo stats…", reply_markup=backup_kb)

    # --- restore-size stats ---
    rc1, raw1 = await run_cmd(
        ["restic", "stats", "--json"],
        use_restic_env=True,
        timeout=30
    )
    if rc1 != 0:
        await msg.answer(raw1, reply_markup=backup_kb)
        return

    restore = json.loads(raw1)

    # --- raw-data stats ---
    rc2, raw2 = await run_cmd(
        ["restic", "stats", "--json", "--mode", "raw-data"],
        use_restic_env=True,
        timeout=30
    )
    if rc2 != 0:
        await msg.answer(raw2, reply_markup=backup_kb)
        return

    raw = json.loads(raw2)

    # --- snapshots count ---
    rc3, raw_snaps = await run_cmd(
        ["restic", "snapshots", "--json"],
        use_restic_env=True,
        timeout=20
    )
    snaps = len(json.loads(raw_snaps)) if rc3 == 0 else "n/a"

    msg_text = (
        "📦 **Repository stats**\n\n"
        f"🧉 Snapshots: {snaps}\n"
        f"📁 Files: {restore.get('total_file_count', 'n/a')}\n"
        f"💽 Logical size: {restore.get('total_size', 0) / (1024**3):.2f} GiB\n"
        f"🧱 Stored data: {raw.get('total_pack_size', 0) / (1024**2):.2f} MiB\n"
    )

    await msg.answer(msg_text, reply_markup=backup_kb, parse_mode="Markdown")


async def cmd_backup_status(msg: Message):
    await msg.answer("⏳ Loading snapshots…", reply_markup=backup_kb)

    async def worker():
        rc, raw = await run_cmd(
            ["restic", "snapshots", "--json"],
            use_restic_env=True,
            timeout=30
        )
        if rc != 0:
            await msg.answer(raw, reply_markup=backup_kb)
            return

        snaps = json.loads(raw)
        if not snaps:
            await msg.answer("📦 Snapshots: none", reply_markup=backup_kb)
            return

        snaps.sort(key=lambda s: s["time"], reverse=True)

        # --- badge ---
        last = snaps[0]
        last_time = datetime.fromisoformat(
            last["time"].replace("Z", "+00:00")
        )
        badge = backup_badge(last_time)

        # --- buttons ---
        rows = []
        for s in snaps[:5]:
            t = datetime.fromisoformat(
                s["time"].replace("Z", "+00:00")
            )
            rows.append([
                InlineKeyboardButton(
                    text=f"🧉 {s['short_id']} | {t:%Y-%m-%d %H:%M}",
                    callback_data=f"snap:{s['short_id']}"
                )
            ])

        kb = InlineKeyboardMarkup(inline_keyboard=rows)

        await msg.answer(
            f"📦 Snapshots ({len(snaps)})\n{badge}",
            reply_markup=kb
        )

    asyncio.create_task(worker())


async def cmd_backup_now(msg: Message):
    if not acquire_lock("backup"):
        await msg.answer("⚠️ Backup уже выполняется", reply_markup=backup_kb)
        return

    await msg.answer("▶️ Backup запущен", reply_markup=backup_kb)

    async def worker():
        try:
            rc, out = await run_cmd(["sudo", "/usr/local/bin/backup.py", "restic-backup"], timeout=6 * 3600)
            await msg.answer(("✅ OK\n" if rc == 0 else "❌ FAIL\n") + out, reply_markup=backup_kb)
        finally:
            release_lock("backup")

    asyncio.create_task(worker())


async def cmd_last_backup(msg: Message):
    try:
        text = await asyncio.to_thread(last_backup)
    except Exception as e:
        await msg.answer(f"❌ Last backup failed: {type(e).__name__}: {e}", reply_markup=backup_kb)
        return
    await msg.answer(text, reply_markup=backup_kb)


@dp.message(F.text == "📦 Status")
async def bs(msg: Message):
    if is_admin_msg(msg):
        await cmd_backup_status(msg)


@dp.message(F.text == "📊 Repo stats")
async def rs(msg: Message):
    if is_admin_msg(msg):
        await cmd_repo_stats(msg)


@dp.message(F.text == "📦 Last backup")
async def lb(msg: Message):
    if is_admin_msg(msg):
        await cmd_last_backup(msg)


@dp.message(F.text == "▶️ Run backup")
async def br(msg: Message):
    if is_admin_msg(msg):
        await cmd_backup_now(msg)


@dp.message(F.text == "🧯 Restore help")
async def rh(msg: Message):
    if is_admin_msg(msg):
        await msg.answer(restore_help(), reply_markup=backup_kb)