import os
from services.runner import run_cmd


def detect_pkg_manager() -> str | None:
    if os.path.exists("/usr/bin/apt"):
        return "apt"
    if os.path.exists("/usr/bin/dnf"):
        return "dnf"
    if os.path.exists("/usr/bin/yum"):
        return "yum"
    if os.path.exists("/usr/bin/pacman"):
        return "pacman"
    return None


async def list_updates() -> str:
    pm = detect_pkg_manager()
    if not pm:
        return "⚠️ No supported package manager found"

    if pm == "apt":
        await run_cmd(["sudo", "apt", "update"], timeout=300)
        rc, out = await run_cmd(["apt", "list", "--upgradable"], timeout=120)
        return f"📦 Updates (apt)\n```{out}```" if rc == 0 else f"❌ apt list failed\n```{out}```"

    if pm == "dnf":
        rc, out = await run_cmd(["sudo", "dnf", "check-update"], timeout=300)
        if rc in (0, 100):
            return f"📦 Updates (dnf)\n```{out}```"
        return f"❌ dnf check-update failed\n```{out}```"

    if pm == "yum":
        rc, out = await run_cmd(["sudo", "yum", "check-update"], timeout=300)
        if rc in (0, 100):
            return f"📦 Updates (yum)\n```{out}```"
        return f"❌ yum check-update failed\n```{out}```"

    if pm == "pacman":
        rc, out = await run_cmd(["pacman", "-Qu"], timeout=120)
        return f"📦 Updates (pacman)\n```{out}```" if rc == 0 else f"❌ pacman -Qu failed\n```{out}```"

    return "⚠️ Unsupported package manager"


async def apply_updates() -> str:
    pm = detect_pkg_manager()
    if not pm:
        return "⚠️ No supported package manager found"

    if pm == "apt":
        await run_cmd(["sudo", "apt", "update"], timeout=300)
        rc, out = await run_cmd(["sudo", "apt-get", "-y", "upgrade"], timeout=1800)
        return f"⬆️ Upgrade (apt)\n```{out}```" if rc == 0 else f"❌ apt upgrade failed\n```{out}```"

    if pm == "dnf":
        rc, out = await run_cmd(["sudo", "dnf", "-y", "upgrade"], timeout=1800)
        return f"⬆️ Upgrade (dnf)\n```{out}```" if rc == 0 else f"❌ dnf upgrade failed\n```{out}```"

    if pm == "yum":
        rc, out = await run_cmd(["sudo", "yum", "-y", "update"], timeout=1800)
        return f"⬆️ Upgrade (yum)\n```{out}```" if rc == 0 else f"❌ yum update failed\n```{out}```"

    if pm == "pacman":
        rc, out = await run_cmd(["sudo", "pacman", "-Syu", "--noconfirm"], timeout=1800)
        return f"⬆️ Upgrade (pacman)\n```{out}```" if rc == 0 else f"❌ pacman -Syu failed\n```{out}```"

    return "⚠️ Unsupported package manager"