import ipaddress
from typing import Any
from uuid import UUID

from pydantic import BaseModel, root_validator, validator

from gso.products.product_blocks import PhyPortCapacity
from gso.products.product_blocks.iptrunk import IptrunkType
from gso.products.product_blocks.router import RouterRole, RouterVendor
from gso.products.product_blocks.site import SiteTier
from gso.services import subscriptions
from gso.services.crm import CustomerNotFoundError, get_customer_by_name


class ImportResponseModel(BaseModel):
    pid: UUID
    detail: str


class SiteImportModel(BaseModel):
    site_name: str
    site_city: str
    site_country: str
    site_country_code: str
    site_latitude: float
    site_longitude: float
    site_bgp_community_id: int
    site_internal_id: int
    site_tier: SiteTier
    site_ts_address: str
    customer: str


class RouterImportModel(BaseModel):
    customer: str
    router_site: str
    hostname: str
    ts_port: int
    router_vendor: RouterVendor
    router_role: RouterRole
    is_ias_connected: bool
    router_lo_ipv4_address: ipaddress.IPv4Address
    router_lo_ipv6_address: ipaddress.IPv6Address
    router_lo_iso_address: str
    router_si_ipv4_network: ipaddress.IPv4Network | None = None
    router_ias_lt_ipv4_network: ipaddress.IPv4Network | None = None
    router_ias_lt_ipv6_network: ipaddress.IPv6Network | None = None


class IptrunkImportModel(BaseModel):
    customer: str
    geant_s_sid: str
    iptrunk_type: IptrunkType
    iptrunk_description: str
    iptrunk_speed: PhyPortCapacity
    iptrunk_minimum_links: int
    iptrunk_sideA_node_id: str
    iptrunk_sideA_ae_iface: str
    iptrunk_sideA_ae_geant_a_sid: str
    iptrunk_sideA_ae_members: list[str]
    iptrunk_sideA_ae_members_descriptions: list[str]
    iptrunk_sideB_node_id: str
    iptrunk_sideB_ae_iface: str
    iptrunk_sideB_ae_geant_a_sid: str
    iptrunk_sideB_ae_members: list[str]
    iptrunk_sideB_ae_members_descriptions: list[str]

    iptrunk_ipv4_network: ipaddress.IPv4Network
    iptrunk_ipv6_network: ipaddress.IPv6Network

    @classmethod
    def _get_active_routers(cls) -> set[str]:
        return {
            str(router_id) for router_id in subscriptions.get_active_router_subscriptions(fields=["subscription_id"])
        }

    @validator("customer")
    def check_if_customer_exists(cls, value: str) -> str:
        try:
            get_customer_by_name(value)
        except CustomerNotFoundError:
            raise ValueError(f"Customer {value} not found")

        return value

    @validator("iptrunk_sideA_node_id", "iptrunk_sideB_node_id")
    def check_if_router_side_is_available(cls, value: str) -> str:
        if value not in cls._get_active_routers():
            raise ValueError("Router not found")

        return value

    @validator("iptrunk_sideA_ae_members", "iptrunk_sideB_ae_members")
    def check_side_uniqueness(cls, value: list[str]) -> list[str]:
        if len(value) != len(set(value)):
            raise ValueError("Items must be unique")

        return value

    @root_validator
    def check_members(cls, values: dict[str, Any]) -> dict[str, Any]:
        min_links = values["iptrunk_minimum_links"]
        side_a_members = values.get("iptrunk_sideA_ae_members", [])
        side_a_descriptions = values.get("iptrunk_sideA_ae_members_descriptions", [])
        side_b_members = values.get("iptrunk_sideB_ae_members", [])
        side_b_descriptions = values.get("iptrunk_sideB_ae_members_descriptions", [])

        len_a = len(side_a_members)
        len_a_desc = len(side_a_descriptions)
        len_b = len(side_b_members)
        len_b_desc = len(side_b_descriptions)

        if len_a < min_links:
            raise ValueError(f"Side A members should be at least {min_links} (iptrunk_minimum_links)")

        if len_a != len_a_desc:
            raise ValueError("Mismatch in Side A members and their descriptions")

        if len_a != len_b:
            raise ValueError("Mismatch between Side A and B members")

        if len_a != len_b_desc:
            raise ValueError("Mismatch in Side B members and their descriptions")

        return values