import unittest

from fgai.logs import parse_log_line
from fgai.profile_suggestions import apply_profile_advice, suggest_stream_profiles


class ProfileSuggestionTests(unittest.TestCase):
    def test_suggests_common_profile_fields_per_stream(self):
        events = [
            parse_log_line(f"fgai_stream_id=firewall fgai_stream=Firewall srcip=10.0.0.{index} dstip=8.8.8.8 dstport=443 action=deny timestamp=2026-06-29T10:00:{index:02d}Z hitcount={index}")
            for index in range(1, 25)
        ]

        suggestions = suggest_stream_profiles(events)
        profile = suggestions[0]["profile"]

        self.assertEqual(profile["stream_id"], "firewall")
        self.assertIn("srcip", profile["entity_fields"])
        self.assertEqual(profile["timestamp_field"], "eventtime")
        self.assertIn("action", profile["categorical_fields"])
        self.assertIn("dstport", profile["categorical_fields"])
        self.assertIn("hitcount", profile["numeric_fields"])
        self.assertIn("deny_action", profile["detectors"])

    def test_placeholder_winlog_fields_do_not_make_firewall_windows(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=firewall fgai_stream='Firewall Logs' srcip=10.0.0.{index} dstip=8.8.8.8 "
                f"dstport=443 action=deny policyid=12 eventid=- winlog.channel=- winlog.event_id=- "
                f"winlog.event_data.targetusername=- hostname=- username=- timestamp=2026-06-29T10:00:{index:02d}Z"
            )
            for index in range(1, 25)
        ]

        suggestion = suggest_stream_profiles(events)[0]
        profile = suggestion["profile"]

        self.assertEqual(suggestion["detected_log_type"], "firewall")
        self.assertNotIn("username", profile["entity_fields"])
        self.assertNotIn("hostname", profile["entity_fields"])
        self.assertIn("srcip", profile["entity_fields"])
        self.assertIn("policyid", profile["categorical_fields"])
        self.assertIn("deny_action", profile["detectors"])

    def test_suggests_windows_event_fields(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=windows fgai_stream='Illuminate:Windows Security Event Log Messages' winlog_event_id=4625 "
                f"winlog_event_data_targetusername=alice winlog_computer_name=host{index % 3} "
                f"event_provider=Microsoft-Windows-Security-Auditing channel=Security logon_type=3 "
                f"winlog_event_data_ipaddress=10.0.0.{index % 5} "
                f"eventtime=2026-06-29T10:00:{index:02d}Z action=failure"
            )
            for index in range(1, 30)
        ]

        profile = suggest_stream_profiles(events)[0]["profile"]

        self.assertIn("username", profile["entity_fields"])
        self.assertIn("hostname", profile["entity_fields"])
        self.assertIn("srcip", profile["entity_fields"])
        self.assertNotIn("winlog_event_data_targetusername", profile["entity_fields"])
        self.assertIn("eventid", profile["categorical_fields"])
        self.assertIn("logon_type", profile["categorical_fields"])
        self.assertIn("event_provider", profile["categorical_fields"])
        self.assertNotIn("policyid", profile["categorical_fields"])
        self.assertNotIn("dstport", profile["categorical_fields"])
        self.assertNotIn("srcip", profile["categorical_fields"])
        self.assertNotIn("eventid", profile["numeric_fields"])
        self.assertIn("auth_failure", profile["detectors"])

    def test_windows_named_stream_gets_auth_profile_even_before_failures(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=winsec fgai_stream='Illuminate:Windows Security Event Log Messages' "
                f"eventid=4624 username=user{index % 4} hostname=host{index % 2} channel=Security "
                f"eventtime=2026-06-29T10:00:{index:02d}Z action=success"
            )
            for index in range(1, 30)
        ]

        suggestion = suggest_stream_profiles(events)[0]
        profile = suggestion["profile"]

        self.assertEqual(suggestion["stream_name"], "Illuminate:Windows Security Event Log Messages")
        self.assertIn("username", profile["entity_fields"])
        self.assertIn("hostname", profile["entity_fields"])
        self.assertIn("eventid", profile["categorical_fields"])
        self.assertIn("auth_failure", profile["detectors"])

    def test_winlogbeat_ecs_fields_build_windows_profile(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=winbeat fgai_stream='Winlogbeat Security' "
                f"@timestamp=2026-06-30T10:00:{index:02d}Z event.code=4625 event.action=logon-failed "
                f"event.outcome=failure event.category=authentication event.type=start "
                f"user.name=user{index % 4} host.name=win{index % 3} source.ip=10.0.0.{index % 5} "
                f"winlog.channel=Security winlog.provider_name=Microsoft-Windows-Security-Auditing "
                f"winlog.event_data.LogonType=3 process.name=proc{index % 3}.exe"
            )
            for index in range(1, 30)
        ]

        profile = suggest_stream_profiles(events)[0]["profile"]

        self.assertEqual(profile["timestamp_field"], "eventtime")
        self.assertEqual(profile["entity_fields"][:3], ["username", "hostname", "srcip"])
        self.assertIn("eventid", profile["categorical_fields"])
        self.assertIn("action", profile["categorical_fields"])
        self.assertIn("event.category", profile["categorical_fields"])
        self.assertIn("winlog.channel", profile["categorical_fields"])
        self.assertIn("process.name", profile["categorical_fields"])
        self.assertNotIn("user.name", profile["categorical_fields"])
        self.assertNotIn("source.ip", profile["categorical_fields"])
        self.assertIn("auth_failure", profile["detectors"])

    def test_discovers_non_priority_application_fields(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=app fgai_stream=BillingApp tenant_id=t{index % 4} actor_id=user{index % 7} "
                f"workflow_state={'approved' if index % 2 else 'rejected'} payment_provider=stripe risk_points={index % 9} "
                f"created_at=2026-06-29T10:00:{index:02d}Z"
            )
            for index in range(1, 40)
        ]

        profile = suggest_stream_profiles(events)[0]["profile"]

        self.assertIn("username", profile["entity_fields"])
        self.assertIn("tenant_id", profile["categorical_fields"])
        self.assertIn("workflow_state", profile["categorical_fields"])
        self.assertIn("risk_points", profile["numeric_fields"])

    def test_profile_discovery_explains_selected_and_rejected_fields(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=app fgai_stream=BillingApp tenant_id=t{index % 4} actor_id=user{index % 7} "
                f"workflow_state={'approved' if index % 2 else 'rejected'} request_id=req-{index} "
                f"constant_field=same raw='{{json}}' risk_points={index % 9} created_at=2026-06-29T10:00:{index:02d}Z"
            )
            for index in range(1, 40)
        ]

        suggestion = suggest_stream_profiles(events)[0]
        discovery = suggestion["discovery"]

        self.assertEqual(suggestion["detected_log_type"], "application")
        self.assertEqual(discovery["log_type"], "application")
        self.assertIn("actor_id", discovery["selected_fields"]["entity"])
        self.assertIn("workflow_state", discovery["selected_fields"]["categorical"])
        self.assertIn("risk_points", discovery["selected_fields"]["numeric"])
        rejected = {item["field"]: item["reason"] for item in discovery["rejected_fields"]}
        self.assertEqual(rejected["raw"], "raw/internal field")
        self.assertEqual(rejected["constant_field"], "constant value")
        self.assertEqual(rejected["request_id"], "too high cardinality")

    def test_fields_shared_between_streams_are_default_profile_candidates(self):
        events = []
        for stream_id, stream_name in (("billing", "BillingApp"), ("orders", "OrdersApp")):
            events.extend(
                parse_log_line(
                    f"fgai_stream_id={stream_id} fgai_stream={stream_name} actor_id=user{index % 6} "
                    f"tenant_id=t{index % 3} workflow_state={'approved' if index % 2 else 'rejected'} "
                    f"result_code=r{index % 4} latency_ms={index % 9} created_at=2026-06-29T10:00:{index:02d}Z"
                )
                for index in range(1, 30)
            )

        suggestions = {item["stream_id"]: item for item in suggest_stream_profiles(events)}

        for suggestion in suggestions.values():
            profile = suggestion["profile"]
            shared = {item["field"] for item in suggestion["shared_fields"]}
            self.assertIn("workflow_state", shared)
            self.assertIn("result_code", shared)
            self.assertIn("latency_ms", shared)
            self.assertIn("workflow_state", profile["categorical_fields"])
            self.assertIn("result_code", profile["categorical_fields"])
            self.assertIn("latency_ms", profile["numeric_fields"])

    def test_semantic_alias_fields_are_shared_across_streams(self):
        events = []
        events.extend(
            parse_log_line(
                f"fgai_stream_id=proxy fgai_stream=Proxy source.ip=10.0.0.{index % 7} url=/item/{index % 3} action=allow"
            )
            for index in range(1, 30)
        )
        events.extend(
            parse_log_line(
                f"fgai_stream_id=firewall fgai_stream=Firewall client_ip=10.0.0.{index % 7} dstport=443 action=accept"
            )
            for index in range(1, 30)
        )

        suggestions = {item["stream_id"]: item for item in suggest_stream_profiles(events)}

        for suggestion in suggestions.values():
            shared = {item["field"]: item for item in suggestion["shared_fields"]}
            self.assertIn("srcip", shared)
            self.assertEqual(shared["srcip"]["kind"], "entity")
            self.assertIn("source.ip", shared["srcip"]["aliases"])
            self.assertIn("client_ip", shared["srcip"]["aliases"])

    def test_custom_namespace_and_suffix_fields_are_shared_across_streams(self):
        events = []
        for stream_id, field in (("app1", "lcs_customer_id"), ("app2", "lcs_order_id")):
            events.extend(
                parse_log_line(
                    f"fgai_stream_id={stream_id} fgai_stream={stream_id} {field}=id{index % 4} result_state=ok actor_name=user{index % 3}"
                )
                for index in range(1, 20)
            )

        suggestions = {item["stream_id"]: item for item in suggest_stream_profiles(events)}

        for suggestion in suggestions.values():
            shared = {item["field"]: item for item in suggestion["shared_fields"]}
            self.assertIn("lcs_*", shared)
            self.assertIn("*_id", shared)
            self.assertIn("*_status", shared)
            self.assertIn("*_name", shared)

    def test_heuristic_profile_recommends_behavior_relationships(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=windows fgai_stream=Windows username=user{index % 3} srcip=10.0.0.{index % 5} hostname=host{index % 4} action=success eventid=4624"
            )
            for index in range(1, 40)
        ]

        suggestion = suggest_stream_profiles(events)[0]
        relationships = {(item["left"], item["right"]) for item in suggestion["relationship_fields"]}

        self.assertIn(("username", "srcip"), relationships)
        self.assertIn("username->srcip", suggestion["discovery"]["selected_fields"]["relationships"])
        self.assertEqual(suggestion["profile"]["relationship_fields"], suggestion["relationship_fields"])

    def test_heuristic_profile_recommends_generic_entity_behavior_relationships(self):
        events = [
            parse_log_line(
                f"fgai_stream_id=app fgai_stream=App entry_context_clientipaddress=10.0.0.{index % 5} entry_context_type={'login' if index % 2 else 'update'} houston_category=cat{index % 3}"
            )
            for index in range(1, 40)
        ]

        suggestion = suggest_stream_profiles(events)[0]
        relationships = {(item["left"], item["right"]) for item in suggestion["relationship_fields"]}

        self.assertIn(("entry_context_clientipaddress", "entry_context_type"), relationships)

    def test_applies_valid_llm_advice_and_rejects_unknown_fields(self):
        suggestion = suggest_stream_profiles([
            parse_log_line("fgai_stream_id=windows fgai_stream=Windows username=alice hostname=host01 eventid=4625 action=failure")
        ])[0]

        advised = apply_profile_advice([suggestion], [{
            "stream_id": "windows",
            "entity_fields": ["username", "not_a_field"],
            "timestamp_field": "eventtime",
            "categorical_fields": ["eventid", "full_message"],
            "numeric_fields": ["missing_number"],
            "detectors": {"auth_failure": {"enabled": True, "minimum": 3, "z_threshold": 2.5}, "made_up": {"enabled": True}},
            "relationship_fields": [{"left": "username", "right": "eventid", "name": "user event"}, {"left": "username", "right": "not_a_field"}],
            "field_roles": {"username": "identity", "not_a_field": "entity"},
            "correlation_roles": {"identity": ["username", "not_a_field"], "asset": ["missing_host"]},
            "reason": "Windows auth fields",
        }])[0]

        self.assertEqual(advised["profile_advisor"]["status"], "ok")
        self.assertEqual(advised["profile"]["entity_fields"], ["username"])
        self.assertIn("eventid", advised["profile"]["categorical_fields"])
        self.assertNotIn("full_message", advised["profile"]["categorical_fields"])
        self.assertEqual(set(advised["profile"]["detectors"]), {"auth_failure"})
        self.assertEqual(advised["profile"]["relationship_fields"], [{"left": "username", "right": "eventid", "name": "user event"}])
        self.assertEqual(advised["profile_advisor"]["field_roles"], {"username": "identity"})
        self.assertEqual(advised["profile_advisor"]["correlation_roles"], {"identity": ["username"]})

    def test_missing_llm_advice_keeps_heuristic_profile(self):
        suggestion = suggest_stream_profiles([
            parse_log_line("fgai_stream_id=app fgai_stream=App actor_id=user1 action=login")
        ])[0]

        advised = apply_profile_advice([suggestion], [])[0]

        self.assertEqual(advised["profile_advisor"]["status"], "heuristic")
        self.assertEqual(advised["profile"], suggestion["profile"])


if __name__ == "__main__":
    unittest.main()
