r"""Automate provisioning of Authentik OAuth2/OIDC Provider & Application for Kavita.

Pre-configures:
1. Authentik OAuth2 Provider with endpoints and flexible redirect URIs:
   - https://kavita.snarfnet.net/signin-oidc
   - https://kavita.snarfnet.net/api/account/openid-callback
   - https://kavita.snarfnet.net/
   - Regex: https://kavita\.snarfnet\.net.*
2. Authentik Application ('kavita') with brand icon and grouping.
3. Outputs exact OIDC values for the Kavita Admin Settings.
"""

import json
import secrets
import ssl
import sys
import urllib.request

ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE

AK_BASE = "https://authentik.snarfnet.net"
AK_TOKEN = "SnarfNetPermanentAutomationToken2026"

AUTH_FLOW = "38a86ef3-f43a-4756-8f54-ca008a8eef6e"
INVAL_FLOW = "7a8145b8-2476-4636-9901-825f826df805"
CERT_PK = "6d48ba88-4b51-428f-903c-93334988a941"

SCOPES = [
    "f521356c-080d-4bd6-b19a-68ab159a5aef",  # openid
    "8395b909-8e8d-4fc1-a620-5592e10df8fe",  # email
    "85b89b43-92d8-425c-b9cc-8e00038cad37",  # profile
    "d2248142-6be2-4833-94f8-e02f5d293b02",  # groups
]


def ak_request(endpoint, method="GET", data=None):
    url = f"{AK_BASE.rstrip('/')}/api/v3/{endpoint.lstrip('/')}"
    body = json.dumps(data).encode("utf-8") if data else None
    headers = {
        "Authorization": f"Bearer {AK_TOKEN}",
        "Content-Type": "application/json",
        "Accept": "application/json",
    }
    req = urllib.request.Request(url, data=body, headers=headers, method=method)
    with urllib.request.urlopen(req, timeout=10, context=ctx) as r:
        raw = r.read().decode("utf-8")
        return r.getcode(), json.loads(raw) if raw else {}


def main():
    print("=" * 60)
    print("Kavita <-> Authentik OIDC Provisioner")
    print("=" * 60)

    # 1. Check or Create Authentik Provider
    code, res = ak_request("providers/oauth2/")
    existing_provider = next((p for p in res.get("results", []) if p.get("name") == "Kavita"), None)

    if existing_provider:
        provider_id = existing_provider["pk"]
        client_id = existing_provider["client_id"]
        client_secret = existing_provider["client_secret"]
        print(f"Existing Kavita Provider found (ID {provider_id})")
    else:
        client_id = f"kavita-{secrets.token_hex(4)}"
        client_secret = secrets.token_urlsafe(40)
        provider_payload = {
            "name": "Kavita",
            "authorization_flow": AUTH_FLOW,
            "invalidation_flow": INVAL_FLOW,
            "property_mappings": SCOPES,
            "client_type": "confidential",
            "client_id": client_id,
            "client_secret": client_secret,
            "include_claims_in_id_token": True,
            "signing_key": CERT_PK,
            "redirect_uris": [
                {"matching_mode": "strict", "url": "https://kavita.snarfnet.net/signin-oidc"},
                {"matching_mode": "strict", "url": "https://kavita.snarfnet.net/api/account/openid-callback"},
                {"matching_mode": "strict", "url": "https://kavita.snarfnet.net/"},
                {"matching_mode": "regex", "url": r"https://kavita\.snarfnet\.net.*"},
            ],
            "sub_mode": "user_username",
            "issuer_mode": "per_provider",
        }
        code, new_prov = ak_request("providers/oauth2/", method="POST", data=provider_payload)
        provider_id = new_prov["pk"]
        print(f"Created Kavita Provider (ID {provider_id}, client_id: {client_id})")

    # 2. Check or Create Authentik Application
    code, res = ak_request("core/applications/")
    existing_app = next((a for a in res.get("results", []) if a.get("slug") == "kavita"), None)

    app_payload = {
        "name": "Kavita",
        "slug": "kavita",
        "provider": provider_id,
        "group": "Storage & Media",
        "meta_icon": "https://cdn.jsdelivr.net/gh/walkxcode/dashboard-icons/png/kavita.png",
        "meta_description": "Digital Comic, Manga & Book Library",
        "meta_launch_url": "https://kavita.snarfnet.net",
        "open_in_new_tab": True,
    }

    if existing_app:
        ak_request("core/applications/kavita/", method="PATCH", data=app_payload)
        print("Updated existing 'kavita' application.")
    else:
        ak_request("core/applications/", method="POST", data=app_payload)
        print("Created 'kavita' application.")

    print("\n" + "=" * 60)
    print("OIDC CONFIGURATION FOR KAVITA SETTINGS:")
    print("=" * 60)
    print(f"Authority / Issuer URL:  {AK_BASE}/application/o/kavita/")
    print(f"Discovery URL:           {AK_BASE}/application/o/kavita/.well-known/openid-configuration")
    print(f"Client ID:               {client_id}")
    print(f"Client Secret:           {client_secret}")
    print(f"Scopes:                  openid email profile")
    print("=" * 60)


if __name__ == "__main__":
    main()