# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2026 Bryan Joshua Pedini
"""
Seed a throwaway NetBox instance with the end-to-end test dataset.

Everything goes through the REST API with the superuser token: a read-only
user with its own token, two tenants, two sites, two clusters, a VRF, three
virtual machines (one with a primary IP) and a handful of IP addresses. All
operations are get-or-create so seeding is idempotent.
"""

import sys
import time
from typing import Any

import requests


class SeedError(Exception):
    """Raised when the NetBox instance cannot be seeded."""


class AdminApi:
    """Minimal admin client for creating objects through the NetBox API."""

    def __init__(self, url: str, token: str, timeout: int = 15):
        self._url = url.rstrip("/")
        self._timeout = timeout
        self._session = requests.Session()
        scheme = "Bearer" if token.startswith("nbt_") else "Token"
        self._session.headers.update(
            {"Authorization": f"{scheme} {token}", "Accept": "application/json"}
        )

    def _check(self, response: requests.Response) -> Any:
        if response.status_code not in (200, 201, 204):
            raise SeedError(
                f"{response.request.method} {response.url}: HTTP {response.status_code}: {response.text[:300]}"
            )
        return response.json() if response.status_code != 204 else None

    def get(self, path: str, params: dict[str, Any] | None = None) -> list[dict[str, Any]]:
        response = self._session.get(
            f"{self._url}/api/{path}/", params=params, timeout=self._timeout
        )
        return self._check(response)["results"]

    def post(self, path: str, payload: dict[str, Any]) -> dict[str, Any]:
        response = self._session.post(
            f"{self._url}/api/{path}/", json=payload, timeout=self._timeout
        )
        return self._check(response)

    def patch(self, path: str, object_id: int, payload: dict[str, Any]) -> dict[str, Any]:
        response = self._session.patch(
            f"{self._url}/api/{path}/{object_id}/", json=payload, timeout=self._timeout
        )
        return self._check(response)

    def delete(self, path: str, object_id: int) -> None:
        response = self._session.delete(
            f"{self._url}/api/{path}/{object_id}/", timeout=self._timeout
        )
        self._check(response)

    def ensure(self, path: str, lookup: dict[str, Any], payload: dict[str, Any]) -> dict[str, Any]:
        """Return the object matching lookup, creating it from payload if missing."""
        matches = self.get(path, params=lookup)
        if matches:
            return matches[0]
        return self.post(path, payload)


def wait_for_api(url: str, timeout: int = 300) -> None:
    """
    Poll /api/status/ until NetBox answers or the timeout expires.

    A 403 counts as up: it means the application is serving requests and only
    authentication is missing.
    """
    deadline = time.monotonic() + timeout
    last_error = "no attempt made"
    while time.monotonic() < deadline:
        try:
            response = requests.get(f"{url.rstrip('/')}/api/status/", timeout=5)
            if response.status_code in (200, 403):
                return
            last_error = f"HTTP {response.status_code}"
        except requests.exceptions.RequestException as exc:
            last_error = str(exc)
        time.sleep(3)
    raise SeedError(f"NetBox at {url} did not come up within {timeout}s: {last_error}")


def provision_token(url: str, username: str, password: str) -> str:
    """Create a fresh API token from user credentials and return its key."""
    try:
        response = requests.post(
            f"{url.rstrip('/')}/api/users/tokens/provision/",
            json={"username": username, "password": password},
            timeout=15,
        )
    except requests.exceptions.RequestException as exc:
        raise SeedError(f"Token provisioning failed: {exc}") from exc
    if response.status_code != 201:
        raise SeedError(
            f"Token provisioning for {username} failed: HTTP {response.status_code}: {response.text[:300]}"
        )
    return _token_secret(response.json())


def _token_secret(data: dict[str, Any]) -> str:
    """
    Return the usable credential of a freshly created token.

    NetBox 4.5 (token v2) shows the secret once in "token" and keeps only the
    public identifier in "key"; the full credential is "nbt_<key>.<secret>".
    Older releases expose the whole secret as "key" directly.
    """
    if data.get("token"):
        return f"nbt_{data['key']}.{data['token']}"
    return data["key"]


def seed(url: str, admin_token: str) -> dict[str, str]:
    """Create the whole e2e dataset and return the read-only user's token."""
    api = AdminApi(url, admin_token)

    customer1 = api.ensure(
        "tenancy/tenants", {"name": "customer1"}, {"name": "customer1", "slug": "customer1"}
    )
    customer2 = api.ensure(
        "tenancy/tenants", {"name": "customer2"}, {"name": "customer2", "slug": "customer2"}
    )
    milan = api.ensure("dcim/sites", {"name": "milan"}, {"name": "milan", "slug": "milan"})
    turin = api.ensure("dcim/sites", {"name": "turin"}, {"name": "turin", "slug": "turin"})
    cluster_type = api.ensure(
        "virtualization/cluster-types", {"name": "proxmox"}, {"name": "proxmox", "slug": "proxmox"}
    )
    cluster1 = api.ensure(
        "virtualization/clusters",
        {"name": "cluster1"},
        {
            "name": "cluster1",
            "type": cluster_type["id"],
            "scope_type": "dcim.site",
            "scope_id": milan["id"],
        },
    )
    cluster2 = api.ensure(
        "virtualization/clusters",
        {"name": "cluster2"},
        {
            "name": "cluster2",
            "type": cluster_type["id"],
            "scope_type": "dcim.site",
            "scope_id": turin["id"],
        },
    )
    internal = api.ensure("ipam/vrfs", {"name": "internal"}, {"name": "internal", "rd": "65000:1"})

    vm01 = api.ensure(
        "virtualization/virtual-machines",
        {"name": "vm01"},
        {
            "name": "vm01",
            "status": "active",
            "cluster": cluster1["id"],
            "site": milan["id"],
            "tenant": customer1["id"],
        },
    )
    api.ensure(
        "virtualization/virtual-machines",
        {"name": "vm02"},
        {
            "name": "vm02",
            "status": "active",
            "cluster": cluster1["id"],
            "site": milan["id"],
            "tenant": customer2["id"],
        },
    )
    api.ensure(
        "virtualization/virtual-machines",
        {"name": "vm03.example.com"},
        {
            "name": "vm03.example.com",
            "status": "active",
            "cluster": cluster2["id"],
            "site": turin["id"],
        },
    )

    # give vm01 primary IPs: interface -> assigned addresses -> primary_ip4/6
    eth0 = api.ensure(
        "virtualization/interfaces",
        {"virtual_machine_id": vm01["id"], "name": "eth0"},
        {"virtual_machine": vm01["id"], "name": "eth0"},
    )
    vm01_ip4 = api.ensure(
        "ipam/ip-addresses",
        {"address": "192.0.2.20/24"},
        {
            "address": "192.0.2.20/24",
            "dns_name": "vm01.example.com",
            "assigned_object_type": "virtualization.vminterface",
            "assigned_object_id": eth0["id"],
        },
    )
    vm01_ip6 = api.ensure(
        "ipam/ip-addresses",
        {"address": "2001:db8::20/64"},
        {
            "address": "2001:db8::20/64",
            "dns_name": "vm01-v6.example.com",
            "assigned_object_type": "virtualization.vminterface",
            "assigned_object_id": eth0["id"],
        },
    )
    api.patch(
        "virtualization/virtual-machines",
        vm01["id"],
        {"primary_ip4": vm01_ip4["id"], "primary_ip6": vm01_ip6["id"]},
    )

    standalone_addresses = [
        {"address": "192.0.2.10/24", "dns_name": "web.example.com", "tenant": customer1["id"]},
        {"address": "192.0.2.11/24", "vrf": internal["id"]},
        {"address": "192.0.2.12/24", "dns_name": "web.example.com"},
        {"address": "2001:db8::10/64", "dns_name": "v6.example.com"},
        {
            "address": "192.0.2.13/24",
            "dns_name": "db.other.org",
            "tenant": customer2["id"],
            "vrf": internal["id"],
        },
    ]
    for payload in standalone_addresses:
        api.ensure("ipam/ip-addresses", {"address": payload["address"]}, payload)

    # dedicated read-only user for the inventory, with a fresh token every run
    # (token secrets are only revealed on self-provisioning, never to admins)
    password = "Ansible-e2e-Passw0rd!"
    user = api.ensure(
        "users/users",
        {"username": "ansible-inventory"},
        {"username": "ansible-inventory", "password": password},
    )
    api.ensure(
        "users/permissions",
        {"name": "ansible-inventory read"},
        {
            "name": "ansible-inventory read",
            "enabled": True,
            "actions": ["view"],
            "object_types": [
                "tenancy.tenant",
                "dcim.site",
                "ipam.ipaddress",
                "ipam.vrf",
                "virtualization.cluster",
                "virtualization.virtualmachine",
            ],
            "users": [user["id"]],
        },
    )
    for token in api.get("users/tokens", params={"user_id": user["id"]}):
        api.delete("users/tokens", token["id"])
    return {
        "url": url,
        "token": provision_token(url, user["username"], password),
        "user": user["username"],
    }


def main() -> int:
    """Seed from the command line: seed.py <url> <admin-user> <admin-password>."""
    if len(sys.argv) != 4:
        print("usage: seed.py <netbox-url> <admin-user> <admin-password>", file=sys.stderr)
        return 2
    try:
        wait_for_api(sys.argv[1])
        admin_token = provision_token(sys.argv[1], sys.argv[2], sys.argv[3])
        result = seed(sys.argv[1], admin_token)
    except SeedError as exc:
        print(f"seed: {exc}", file=sys.stderr)
        return 1
    print(f"seeded, inventory token for {result['user']}: {result['token']}")
    return 0


if __name__ == "__main__":
    sys.exit(main())