import os
import sys
from unifi_controller_api import UnifiController
from unifi_controller_api.exceptions import UnifiAuthenticationError, UnifiAPIError
from pprint import pprint

import pynetbox

class Db():
    def __init__(self):
        self.devices = []
        self.interfaces = []
        self.ips = []

class NetboxCache():
    def __init__(self, nb):
        self.nb = nb
        self.device_roles = {}
        self.device_types = {}

    def get_device_role(self, slug):
        dt = self.device_roles.get(slug)

        if dt is not None:
            return dt

        dt = self.nb.dcim.device_roles.get(slug=slug)
        
        if dt is None:
            raise Exception(f"No such device type: {slug}")

        self.device_roles[slug] = dt
        return dt

    def get_device_type(self, slug):
        dt = self.device_types.get(slug)

        if dt is not None:
            return dt

        dt = self.nb.dcim.device_types.get(slug=slug)
        
        if dt is None:
            raise Exception(f"No such device type: {slug}")

        self.device_types[slug] = dt
        return dt

def process_switch(d, db: Db, nb: NetboxCache, site, vrf):
    db.devices.append({
        "name": d.name,
        "device_type": nb.get_device_type("ubiquiti-us-8-150w").id,
        "role": nb.get_device_role("switch").id,
        "mac": d.mac,
        "serial": d.serial,
        "site": site.id,
    })

def main():
    unifi_url=os.getenv("UNIFI_URL")
    unifi_username=os.getenv("UNIFI_USERNAME")
    unifi_password=os.getenv("UNIFI_PASSWORD")
    unifi_site=os.getenv("UNIFI_SITE")

    netbox_url=os.getenv("NETBOX_URL")
    netbox_token=os.getenv("NETBOX_TOKEN")
    netbox_vrf_name=os.getenv("NETBOX_VRF")
    netbox_site_name=os.getenv("NETBOX_SITE")

    controller = controller_login(unifi_url, unifi_username, unifi_password)

    (nb, netbox_site, netbox_vrf) = netbox_login(netbox_url, netbox_token, netbox_site_name, netbox_vrf_name)
    status = nb.status()
    print(f"NetBox status: {status}")

    devices = collect_devices(controller, unifi_site)

    nb_cache = NetboxCache(nb)
    db = Db()
    for d in devices:
        pprint(d)
        if d.model == "US8P150":
            process_switch(d, db, nb_cache, netbox_site, netbox_vrf)

    print_db(db)

    sync_db(nb, db)

def controller_login(url, username, password) -> UnifiController:
#    try:
        controller = UnifiController(
            controller_url=url,
            username=username,
            password=password,
            is_udm_pro=False,
            verify_ssl=True,
        )

        # Just to check that there is a valid authentication
        controller.get_unifi_site(include_health=False, raw=False)

        return controller
#    except UnifiAuthenticationError:
#        print("Authentication failed - please check your UniFi Controller credentials and URL.")
#    except UnifiAPIError as e:
#        print(f"UniFi API error: {e}")
#    except Exception as e:
#        print(f"An unexpected error occurred: {e}")

def collect_devices(controller: UnifiController, site_name: str) -> list[any]:
    try:
        return controller.get_unifi_site_device(site_name=site_name, detailed=True, raw=False)
    except UnifiAPIError as e:
        print(f"Error fetching device information: {e}")
    except Exception as e:
        print(f"An unexpected error occurred: {e}")

    devices = sorted(devices, key=lambda d: d.name)
    for d in devices:
        print(f"{d.name}", file=sys.stderr)
        print(f"{d}", file=sys.stderr)
        db.devices = devices
#        db.devices.append({
#            "name": d.name,
#            "mac": d.mac,
#            "serial": d.serial,
#        })
#        db.ips.append({
#            "address": d.ip,
#            "status": "active",
#            "vrf": None,
#            "device": d.name,
#            "interface": "",
#            "is_primary": "true",
#        })
#        db.interfaces.append({
#        })

    return db

def print_db(db: Db):
    def p(xs):
        for x in xs:
            print(f"---")
            for k, v in x.items():
                print(f"{k}: {v}")

    p(sorted(db.devices, key=lambda d: d["name"]))
    p(sorted(db.interfaces, key=lambda d: d["address"]))
    p(sorted(db.ips, key=lambda d: d["address"]))

def sync_db(nb, db: Db):
    print("Synchronizing")
    for d in db.devices:
        pprint(d)
        remote = nb.dcim.devices.get(name = d["name"])
        if remote is None:
            print(f"Creating new for {d['name']}")
            remote = nb.dcim.devices.create(d)
            pprint(remote.serialize())
        else:
            pprint(remote.serialize())
            remote.update(d)

def netbox_login(url: str, token: str, site_name: str, vrf_name: str) -> pynetbox.core.api.Api:
    nb = pynetbox.api(url, token=token)

    site = nb.dcim.sites.get(name=site_name)
    if site is None:
        site = nb.dcim.sites.get(slug=site_name)
        if site is None:
            print(f"Could not look up site by name or slug: {site_name}", file=sys.stderr)
            exit(1)
    print(f"NetBox site {site.name}", file=sys.stderr)

    vrf = None
    vrf_id = None
    if vrf_name is not None:
        vrf = nb.ipam.vrfs.get(site=site, name=vrf_name)
        if vrf is None:
            print(f"Could not look up VRF by slug: {vrf_name}", file=sys.stderr)
            exit(1)
        vrf_id = vrf.id

    return nb, site, vrf

if __name__ == "__main__":
    main()