"""Tests for the ``[web]`` / ``[web.oidc]`` config section (W3 of the web-UI plan).

Contract: ``[web]`` absent means the web UI is disabled by default; secrets
are NEVER read from TOML — only keyring key *names* (``client_secret_cred``,
``session_secret_cred``).
"""

from __future__ import annotations

from pathlib import Path

from ci_orchestrator.config import WebConfig, WebOidcConfig, load_config


def _paths_section() -> str:
    return (
        '[paths]\nroot = "/var/lib/ci"\ntemplates = "/var/lib/ci/templates"\n'
        'build_vms = "/var/lib/ci/build-vms"\nartifacts = "/var/lib/ci/artifacts"\n'
        'keys = "/var/lib/ci/keys"\n'
    )


def _write_toml(tmp_path: Path, extra: str = "") -> Path:
    toml = tmp_path / "config.toml"
    toml.write_text(_paths_section() + extra, encoding="utf-8")
    return toml


# ── [web] absent ─────────────────────────────────────────────────────────────


def test_web_absent_defaults_to_disabled(tmp_path: Path) -> None:
    cfg = load_config(config_path=_write_toml(tmp_path), env={})

    assert cfg.web == WebConfig()
    assert cfg.web.enabled is False
    assert cfg.web.oidc is None


def test_web_absent_when_no_toml_file_at_all(tmp_path: Path) -> None:
    # No config file at all -> pure defaults.
    cfg = load_config(config_path=tmp_path / "nope.toml", env={})

    assert cfg.web.enabled is False
    assert cfg.web.oidc is None


# ── [web] present ────────────────────────────────────────────────────────────


def test_web_section_populates_fields(tmp_path: Path) -> None:
    extra = (
        "\n[web]\n"
        "enabled = true\n"
        'bind_host = "192.168.1.50"\n'
        "bind_port = 9000\n"
        'audit_log = "/var/lib/ci/logs/custom-audit.jsonl"\n'
        'allowed_users = ["simone", "alice"]\n'
        'session_secret_cred = "MySessionCred"\n'
    )
    cfg = load_config(config_path=_write_toml(tmp_path, extra), env={})

    assert cfg.web.enabled is True
    assert cfg.web.bind_host == "192.168.1.50"
    assert cfg.web.bind_port == 9000
    assert cfg.web.audit_log == Path("/var/lib/ci/logs/custom-audit.jsonl")
    assert cfg.web.allowed_users == ["simone", "alice"]
    assert cfg.web.session_secret_cred == "MySessionCred"
    assert cfg.web.oidc is None


def test_web_section_partial_uses_defaults_for_rest(tmp_path: Path) -> None:
    extra = "\n[web]\nenabled = true\n"
    cfg = load_config(config_path=_write_toml(tmp_path, extra), env={})

    assert cfg.web.enabled is True
    assert cfg.web.bind_host == "127.0.0.1"
    assert cfg.web.bind_port == 8800
    assert cfg.web.audit_log == Path("/var/lib/ci/logs/web-audit.jsonl")
    assert cfg.web.allowed_users == []
    assert cfg.web.session_secret_cred == "WebSessionSecret"


# ── [web.oidc] ───────────────────────────────────────────────────────────────


def test_web_oidc_section_populates_fields(tmp_path: Path) -> None:
    extra = (
        "\n[web]\nenabled = true\n"
        "\n[web.oidc]\n"
        'issuer = "https://gitea.lan"\n'
        'client_id = "ci-web"\n'
        'redirect_url = "http://192.168.1.50:8800/auth/callback"\n'
        'client_secret_cred = "MyOidcCred"\n'
        'scopes = ["openid", "profile", "email"]\n'
    )
    cfg = load_config(config_path=_write_toml(tmp_path, extra), env={})

    assert cfg.web.oidc == WebOidcConfig(
        issuer="https://gitea.lan",
        client_id="ci-web",
        redirect_url="http://192.168.1.50:8800/auth/callback",
        client_secret_cred="MyOidcCred",
        scopes=["openid", "profile", "email"],
    )


def test_web_oidc_section_defaults_client_secret_cred_and_scopes(tmp_path: Path) -> None:
    extra = (
        "\n[web.oidc]\n"
        'issuer = "https://gitea.lan"\n'
        'client_id = "ci-web"\n'
        'redirect_url = "http://192.168.1.50:8800/auth/callback"\n'
    )
    cfg = load_config(config_path=_write_toml(tmp_path, extra), env={})

    assert cfg.web.oidc is not None
    assert cfg.web.oidc.client_secret_cred == "WebOidcClientSecret"
    assert cfg.web.oidc.scopes == ["openid", "profile"]


def test_web_oidc_missing_required_key_yields_none_not_crash(tmp_path: Path) -> None:
    # Missing redirect_url -> oidc must degrade to None, never raise.
    extra = (
        "\n[web.oidc]\n"
        'issuer = "https://gitea.lan"\n'
        'client_id = "ci-web"\n'
    )
    cfg = load_config(config_path=_write_toml(tmp_path, extra), env={})

    assert cfg.web.oidc is None


def test_web_oidc_empty_section_yields_none(tmp_path: Path) -> None:
    extra = "\n[web.oidc]\n"
    cfg = load_config(config_path=_write_toml(tmp_path, extra), env={})

    assert cfg.web.oidc is None


# ── security: no secret values ever stored ──────────────────────────────────


def test_no_secret_value_fields_exist_on_web_config() -> None:
    """Only keyring key *names* are stored -- never a secret value."""
    field_names = set(WebConfig.__dataclass_fields__)
    assert "session_secret" not in field_names
    assert "session_secret_value" not in field_names
    assert "session_secret_cred" in field_names


def test_no_secret_value_fields_exist_on_web_oidc_config() -> None:
    field_names = set(WebOidcConfig.__dataclass_fields__)
    assert "client_secret" not in field_names
    assert "client_secret_value" not in field_names
    assert "client_secret_cred" in field_names


def test_toml_secret_looking_value_is_never_surfaced_as_a_secret(tmp_path: Path) -> None:
    """Even if a TOML author mistakenly writes a secret-shaped value under
    ``client_secret_cred``/``session_secret_cred``, config.py only ever
    treats it as a keyring key *name* -- there is no code path that reads a
    ``client_secret``/``session_secret`` key from TOML at all.
    """
    extra = (
        "\n[web]\nenabled = true\n"
        'session_secret_cred = "sk-not-a-real-secret-just-a-name"\n'
        "\n[web.oidc]\n"
        'issuer = "https://gitea.lan"\n'
        'client_id = "ci-web"\n'
        'redirect_url = "http://192.168.1.50:8800/auth/callback"\n'
        'client_secret_cred = "another-cred-name"\n'
        # If config.py ever started reading these, this test would need to
        # change -- their presence here proves they are ignored.
        'client_secret = "should-never-be-read"\n'
    )
    cfg = load_config(config_path=_write_toml(tmp_path, extra), env={})

    assert cfg.web.session_secret_cred == "sk-not-a-real-secret-just-a-name"
    assert cfg.web.oidc is not None
    assert cfg.web.oidc.client_secret_cred == "another-cred-name"
    # No attribute on WebOidcConfig can ever hold "should-never-be-read".
    for value in vars(cfg.web.oidc).values():
        assert value != "should-never-be-read"