"""Tests for the Keycloak export module."""

import json
import uuid

import pytest

from local_identity.export import (
    _deterministic_id,
    bulk_export_body,
    split_fullname,
    user_to_keycloak,
    validate_keycloak_user,
)
from local_identity.user import ProductionIdentity, UserRecord, make_test_user

PRIMARY = UserRecord(
    username="tegwick",
    fullname="Bernd Worsch",
    email="bernd.worsch@gmail.com",
)


# ------------------------------------------------------------------ #
# split_fullname                                                      #
# ------------------------------------------------------------------ #

class TestSplitFullname:
    def test_two_words(self):
        assert split_fullname("Bernd Worsch") == ("Bernd", "Worsch")

    def test_three_words(self):
        assert split_fullname("Jean Claude Damme") == ("Jean Claude", "Damme")

    def test_single_word(self):
        assert split_fullname("Madonna") == ("Madonna", "")

    def test_extra_whitespace_stripped(self):
        assert split_fullname("  Bernd  Worsch  ") == ("Bernd", "Worsch")

    def test_non_ascii(self):
        first, last = split_fullname("Ärger Müller")
        assert first == "Ärger"
        assert last == "Müller"


# ------------------------------------------------------------------ #
# _deterministic_id                                                   #
# ------------------------------------------------------------------ #

class TestDeterministicId:
    def test_stable_across_calls(self):
        assert _deterministic_id("net-kingdom", "tegwick") == _deterministic_id("net-kingdom", "tegwick")

    def test_different_realm_gives_different_id(self):
        assert _deterministic_id("realm-a", "u") != _deterministic_id("realm-b", "u")

    def test_different_username_gives_different_id(self):
        assert _deterministic_id("r", "alice") != _deterministic_id("r", "bob")

    def test_is_valid_uuid(self):
        uid = _deterministic_id("net-kingdom", "tegwick")
        uuid.UUID(uid)  # must not raise


# ------------------------------------------------------------------ #
# user_to_keycloak                                                    #
# ------------------------------------------------------------------ #

class TestUserToKeycloak:
    def test_username(self):
        assert user_to_keycloak(PRIMARY)["username"] == "tegwick"

    def test_name_split(self):
        kc = user_to_keycloak(PRIMARY)
        assert kc["firstName"] == "Bernd"
        assert kc["lastName"] == "Worsch"

    def test_email(self):
        assert user_to_keycloak(PRIMARY)["email"] == "bernd.worsch@gmail.com"

    def test_enabled_and_email_verified(self):
        kc = user_to_keycloak(PRIMARY)
        assert kc["enabled"] is True
        assert kc["emailVerified"] is False

    def test_environment_attribute(self):
        kc = user_to_keycloak(PRIMARY)
        assert kc["attributes"]["local_identity_environment"] == ["local"]

    def test_primary_user_has_no_generated_attribute(self):
        kc = user_to_keycloak(PRIMARY)
        assert "local_identity_generated" not in kc["attributes"]

    def test_test_user_has_generated_attribute(self):
        t = make_test_user(PRIMARY, 1)
        kc = user_to_keycloak(t)
        assert kc["attributes"]["local_identity_generated"] == ["true"]

    def test_structural_fields_present(self):
        kc = user_to_keycloak(PRIMARY)
        for field in ("credentials", "requiredActions", "groups", "realmRoles", "clientRoles"):
            assert field in kc, f"missing field '{field}'"

    def test_id_is_deterministic(self):
        assert user_to_keycloak(PRIMARY)["id"] == user_to_keycloak(PRIMARY)["id"]

    def test_id_is_valid_uuid(self):
        uuid.UUID(user_to_keycloak(PRIMARY)["id"])

    def test_json_serializable(self):
        json.dumps(user_to_keycloak(PRIMARY))  # must not raise

    def test_production_identity_overrides_username(self):
        u = UserRecord(
            username="tegwick",
            fullname="Bernd Worsch",
            email="bernd.worsch@gmail.com",
            production_identity=ProductionIdentity(username="bworsch", realm="prod"),
        )
        assert user_to_keycloak(u)["username"] == "bworsch"

    def test_production_identity_realm_used_in_id(self):
        u = UserRecord(
            username="tegwick",
            fullname="Bernd Worsch",
            email="bernd.worsch@gmail.com",
            production_identity=ProductionIdentity(username="bworsch", realm="prod"),
        )
        expected_id = _deterministic_id("prod", "bworsch")
        assert user_to_keycloak(u)["id"] == expected_id

    def test_default_realm_used_when_no_production_identity(self):
        expected_id = _deterministic_id("my-realm", "tegwick")
        assert user_to_keycloak(PRIMARY, realm="my-realm")["id"] == expected_id


# ------------------------------------------------------------------ #
# validate_keycloak_user                                              #
# ------------------------------------------------------------------ #

class TestValidateKeycloakUser:
    def test_valid_passes(self):
        validate_keycloak_user(user_to_keycloak(PRIMARY))  # must not raise

    def test_missing_field_raises(self):
        d = user_to_keycloak(PRIMARY)
        del d["username"]
        with pytest.raises(ValueError, match="username"):
            validate_keycloak_user(d)

    def test_wrong_type_raises(self):
        d = user_to_keycloak(PRIMARY)
        d["enabled"] = "yes"
        with pytest.raises(ValueError, match="enabled"):
            validate_keycloak_user(d)

    def test_multiple_errors_all_reported(self):
        d = user_to_keycloak(PRIMARY)
        del d["username"]
        del d["email"]
        with pytest.raises(ValueError) as exc_info:
            validate_keycloak_user(d)
        msg = str(exc_info.value)
        assert "username" in msg
        assert "email" in msg


# ------------------------------------------------------------------ #
# bulk_export_body                                                    #
# ------------------------------------------------------------------ #

class TestBulkExportBody:
    def test_required_keys_present(self):
        body = bulk_export_body([PRIMARY])
        assert "ifResourceExists" in body
        assert "realm" in body
        assert "users" in body

    def test_default_if_resource_exists(self):
        assert bulk_export_body([PRIMARY])["ifResourceExists"] == "SKIP"

    def test_custom_realm(self):
        assert bulk_export_body([PRIMARY], realm="my-realm")["realm"] == "my-realm"

    def test_user_count(self):
        users = [PRIMARY, make_test_user(PRIMARY, 1), make_test_user(PRIMARY, 2)]
        assert len(bulk_export_body(users)["users"]) == 3

    def test_empty_user_list(self):
        assert bulk_export_body([])["users"] == []

    def test_overwrite_strategy(self):
        body = bulk_export_body([PRIMARY], if_resource_exists="OVERWRITE")
        assert body["ifResourceExists"] == "OVERWRITE"

    def test_json_serializable(self):
        json.dumps(bulk_export_body([PRIMARY, make_test_user(PRIMARY, 1)]))