"""Een eigen IP-adres per container, en een publieke URL per container.

Beide gingen per stack. Bij een app met één container klopt dat, maar de
ARR-stack heeft er vijftig: één adres voor de hele stack betekende dat de eerste
container het kreeg en alle andere hun poortmappings kwijtraakten zonder er iets
voor terug te krijgen. Daarna waren ze nergens meer te bereiken.
"""
import json
import sys
import time
from pathlib import Path

import pytest
import yaml

sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "server-up"))

from conftest import login

NETWERK = {"name": "lan", "parent": "eth0", "subnet": "192.168.1.0/24",
           "gateway": "192.168.1.1", "range": "192.168.1.240/28",
           "driver": "macvlan"}


def _maak_bron(env, naam="tweeling"):
    """Sjabloon met twee containers, elk met een eigen poort."""
    from core import git
    wortel = git.cache_dir("server-up") / "apps" / naam
    (wortel / "files").mkdir(parents=True, exist_ok=True)
    (wortel / "template.json").write_text(json.dumps({
        "kind": "compose",
        "metadata": {"name": naam, "description": "test"},
        "variables": [{"title": "Algemeen", "items": [
            {"name": "service_name", "type": "str", "title": "Naam",
             "default": naam, "required": True},
        ]}],
    }), encoding="utf-8")
    (wortel / "files" / "compose.yaml").write_text(
        "services:\n"
        "  << service_name >>-een:\n"
        "    image: nginx\n"
        "    ports:\n"
        '      - "8801:80"\n'
        "  << service_name >>-twee:\n"
        "    image: nginx\n"
        "    ports:\n"
        '      - "8802:80"\n', encoding="utf-8")
    return wortel


@pytest.fixture
def netwerk(env):
    import core as cfg
    cfg.patch({"NETWORKS": [NETWERK]})


def _installeer(client, csrf, monkeypatch, body):
    """Installeer zonder Docker: alleen het compose-bestand op schijf telt."""
    from core import docker, networks
    import app as app_module
    monkeypatch.setattr(docker, "validate_compose", lambda *a, **k: (True, ""))
    monkeypatch.setattr(docker, "compose_up", lambda *a, **k: 0)
    monkeypatch.setattr(networks, "used_ips", lambda *a, **k: set())
    monkeypatch.setattr(networks, "ensure_shared", lambda *a, **k: (True, ""))
    monkeypatch.setattr(app_module, "_reserved_ips", lambda: set())
    r = client.post("/api/store/install", json=body,
                    headers={"X-CSRF-Token": csrf})
    jid = (r.get_json() or {}).get("job_id")
    if jid:
        einde = time.time() + 15
        while time.time() < einde:
            d = client.get(f"/api/jobs/{jid}").get_json() or {}
            if d.get("status") in ("done", "error"):
                break
            time.sleep(0.05)
    return r


def _compose(env, naam):
    import core as cfg
    d = Path(cfg.load()["LIBRARY_DIR"]) / naam
    return yaml.safe_load((d / "docker-compose.yml").read_text(encoding="utf-8"))


def test_adres_per_container(client, env, netwerk, monkeypatch):
    csrf = login(client)
    _maak_bron(env)
    r = _installeer(client, csrf, monkeypatch, {
        "stack": "tweeling", "repo_id": "server-up", "instance": "tweeling",
        "network": "lan", "ips": {"tweeling-een": "192.168.1.241"},
        "app_networks": [],
    })
    assert r.get_json().get("job_id"), r.get_json()
    doc = _compose(env, "tweeling")
    een = doc["services"]["tweeling-een"]
    twee = doc["services"]["tweeling-twee"]
    assert een["networks"]["lan"] == {"ipv4_address": "192.168.1.241"}
    assert "ports" not in een
    # En dit is waar het om gaat: de andere container is níét stilzwijgend
    # onbereikbaar geworden.
    assert twee["ports"] == ["8802:80"]


def test_leeg_adres_wordt_aangevuld(client, env, netwerk, monkeypatch):
    csrf = login(client)
    _maak_bron(env)
    _installeer(client, csrf, monkeypatch, {
        "stack": "tweeling", "repo_id": "server-up", "instance": "tweeling",
        "network": "lan", "ips": {"tweeling-een": "", "tweeling-twee": ""},
        "app_networks": [],
    })
    doc = _compose(env, "tweeling")
    adressen = {n: s["networks"]["lan"]["ipv4_address"]
                for n, s in doc["services"].items()}
    assert len(set(adressen.values())) == 2, f"zelfde adres twee keer: {adressen}"


def test_adres_buiten_het_subnet_wordt_geweigerd(client, env, netwerk, monkeypatch):
    csrf = login(client)
    _maak_bron(env)
    r = _installeer(client, csrf, monkeypatch, {
        "stack": "tweeling", "repo_id": "server-up", "instance": "tweeling",
        "network": "lan", "ips": {"tweeling-een": "10.0.0.5"}, "app_networks": [],
    })
    assert r.status_code == 400
    assert "subnet" in r.get_json()["msg"]


def test_adressen_staan_in_de_metadata(client, env, netwerk, monkeypatch):
    """Zonder dit weet het herconfigureerscherm niet meer welke container welk
    adres had."""
    csrf = login(client)
    _maak_bron(env)
    _installeer(client, csrf, monkeypatch, {
        "stack": "tweeling", "repo_id": "server-up", "instance": "tweeling",
        "network": "lan", "ips": {"tweeling-een": "192.168.1.241"},
        "app_networks": [],
    })
    import core as cfg
    meta = json.loads((Path(cfg.load()["LIBRARY_DIR"]) / "tweeling"
                       / ".serverup.json").read_text(encoding="utf-8"))
    assert meta["ips"] == {"tweeling-een": "192.168.1.241"}

    r = client.get("/api/stacks/tweeling/config")
    assert r.get_json()["ips"] == {"tweeling-een": "192.168.1.241"}


def test_zonder_mapping_blijft_het_bij_een_adres(client, env, netwerk, monkeypatch):
    """Een app met één container hoort niets van deze uitbreiding te merken."""
    csrf = login(client)
    _maak_bron(env)
    _installeer(client, csrf, monkeypatch, {
        "stack": "tweeling", "repo_id": "server-up", "instance": "tweeling",
        "network": "lan", "ip": "192.168.1.245", "app_networks": [],
    })
    doc = _compose(env, "tweeling")
    met_adres = [n for n, s in doc["services"].items()
                 if isinstance(s.get("networks"), dict) and "lan" in s["networks"]]
    assert met_adres == ["tweeling-een"]


# ── Pangolin ─────────────────────────────────────────────────────────────────

def test_publieke_url_per_container(client, env, netwerk, monkeypatch):
    """Pangolin pakte de eerste poort in het bestand. Bij twintig webinterfaces
    kreeg je dus twintig keer dezelfde."""
    csrf = login(client)
    _maak_bron(env)
    _installeer(client, csrf, monkeypatch, {
        "stack": "tweeling", "repo_id": "server-up", "instance": "tweeling",
        "app_networks": [],
    })
    from core import pangolin
    gezien = {}

    def nep(naam, subdomein, ip, poort, site_id=None, domein_id=""):
        gezien.update(naam=naam, ip=ip, poort=poort)
        return {"url": f"https://{subdomein}.example.com", "resource_id": 1}

    monkeypatch.setattr(pangolin, "ingesteld", lambda: True)
    monkeypatch.setattr(pangolin, "publiceer", nep)

    r = client.post("/api/stacks/tweeling/pangolin",
                    json={"service": "tweeling-twee", "host_ip": "10.1.2.3"},
                    headers={"X-CSRF-Token": csrf})
    assert r.get_json()["ok"], r.get_json()
    assert gezien["poort"] == 8802, gezien
    assert gezien["naam"] == "tweeling-twee"

    import core as cfg
    meta = json.loads((Path(cfg.load()["LIBRARY_DIR"]) / "tweeling"
                       / ".serverup.json").read_text(encoding="utf-8"))
    assert meta["pangolin_urls"]["tweeling-twee"] == \
        "https://tweeling-twee.example.com"