extends "res://tests/test_case.gd"

const ControlPlaneClient = preload("res://scripts/control_plane_client.gd")
const RankedProfileState = preload("res://scripts/ranked_profile_state.gd")


func test_base_url_validation_rejects_ambiguous_or_insecure_values() -> void:
	assert_true(ControlPlaneClient.is_valid_base_url("http://127.0.0.1:8080"), "local HTTP endpoint is valid")
	assert_true(ControlPlaneClient.is_valid_base_url("https://match.example"), "HTTPS endpoint is valid")
	assert_true(not ControlPlaneClient.is_valid_base_url("match.example"), "scheme is required")
	assert_true(not ControlPlaneClient.is_valid_base_url("http://match.example/"), "trailing slash is normalized before validation")
	assert_true(not ControlPlaneClient.is_valid_base_url("http://match example"), "whitespace is rejected")
	assert_true(not ControlPlaneClient.is_valid_base_url("https://user:pass@match.example"), "userinfo is rejected")
	assert_true(not ControlPlaneClient.is_valid_base_url("https://match.example?token=secret"), "query strings are rejected")

	var client := ControlPlaneClient.new()
	assert_true(client.configure("https://match.example", "session-id:opaque-token"), "safe access token configures")
	assert_true(not client.configure("https://match.example", "token\nforged-header"), "header injection is rejected")
	assert_true(ControlPlaneClient.is_valid_web_api_ticket("ticket-value"), "ordinary Steam Web API ticket is accepted")
	assert_true(not ControlPlaneClient.is_valid_web_api_ticket("ticket\nforged"), "ticket header characters are rejected")
	assert_true(not ControlPlaneClient.is_valid_web_api_ticket(""), "empty Steam ticket is rejected")
	assert_true(ControlPlaneClient.is_valid_access_token("session-id:opaque-token"), "opaque session format is accepted")
	assert_true(not ControlPlaneClient.is_valid_access_token(":opaque-token"), "missing session identifier is rejected")
	assert_true(not ControlPlaneClient.is_valid_access_token("session-id:token\nforged"), "session header injection is rejected")
	assert_eq(ControlPlaneClient.websocket_url("https://match.example"), "wss://match.example", "TLS control plane uses secure WebSocket")
	assert_eq(ControlPlaneClient.websocket_url("http://127.0.0.1:8080"), "ws://127.0.0.1:8080", "local control plane uses WebSocket")
	assert_eq(ControlPlaneClient.websocket_url("match.example"), "", "unscoped URL cannot become a WebSocket URL")
	var unconfigured := ControlPlaneClient.new()
	assert_eq(unconfigured.connect_event_stream(), ERR_UNAUTHORIZED, "event stream requires an authenticated session")


func test_ticket_normalization_preserves_payload_and_derives_expiry() -> void:
	var payload := {"ticket_id": "ticket-1", "state": "QUEUED", "expires_at": "2026-08-31T12:00:00Z"}
	var normalized := ControlPlaneClient.normalize_ticket(payload)
	assert_eq(normalized["ticket_id"], "ticket-1", "normalization preserves ticket identity")
	assert_true(normalized.has("expires_at_unix"), "RFC3339 expiry is available to the projection")
	assert_true(int(normalized["expires_at_unix"]) > 0, "expiry is converted to a positive epoch")
	assert_true(not payload.has("expires_at_unix"), "normalization does not mutate the HTTP payload")


func test_ticket_normalization_derives_authoritative_enqueue_time() -> void:
	var normalized := ControlPlaneClient.normalize_ticket({"enqueued_at": "1970-01-01T00:16:40Z"})
	assert_eq(int(normalized["enqueued_at_unix"]), 1000, "RFC3339 enqueue time is converted to epoch")
	assert_eq(ControlPlaneClient.normalize_ticket({"enqueued_at": "not-a-timestamp"})["enqueued_at_unix"], -1, "malformed enqueue time remains visibly invalid")
	assert_eq(ControlPlaneClient.normalize_ticket({"expires_at": 123})["expires_at_unix"], -1, "non-string expiry remains visibly invalid")


func test_session_expiry_is_checked_at_the_boundary_and_fails_closed() -> void:
	assert_true(not ControlPlaneClient.is_session_expired("", 1000), "legacy sessions without an expiry remain compatible")
	assert_true(not ControlPlaneClient.is_session_expired("1970-01-01T00:16:40Z", 999), "session remains valid before expiry")
	assert_true(ControlPlaneClient.is_session_expired("1970-01-01T00:16:40Z", 1000), "session expires at the exact boundary")
	assert_true(ControlPlaneClient.is_session_expired("not-a-timestamp", 1000), "malformed non-empty expiry fails closed")
	assert_true(ControlPlaneClient.is_valid_rfc3339_timestamp("2026-08-31T12:00:00.123Z"), "fractional RFC3339 timestamp is accepted")
	assert_true(not ControlPlaneClient.is_valid_rfc3339_timestamp("2026-02-30T12:00:00Z"), "impossible calendar date is rejected")
	assert_true(not ControlPlaneClient.is_valid_rfc3339_timestamp("2026-13-01T12:00:00Z"), "impossible month is rejected")
	assert_true(not ControlPlaneClient.is_valid_rfc3339_timestamp("2026-08-31 12:00:00Z"), "space-separated timestamp is rejected")
	assert_true(not ControlPlaneClient.is_valid_rfc3339_timestamp("2026-08-31T12:00:00"), "timezone-less timestamp is rejected")
	var valid_session := {"player_id": "player_1234567890", "access_token": "session-id:opaque-token", "expires_at": "2099-08-31T12:00:00Z"}
	assert_true(ControlPlaneClient.is_valid_session_response(valid_session), "future session response is accepted")
	var missing_expiry := valid_session.duplicate()
	missing_expiry.erase("expires_at")
	assert_true(not ControlPlaneClient.is_valid_session_response(missing_expiry), "session without expiry is rejected")
	var malformed_expiry := valid_session.duplicate()
	malformed_expiry["expires_at"] = "tomorrow"
	assert_true(not ControlPlaneClient.is_valid_session_response(malformed_expiry), "malformed session expiry is rejected")
	var expired_session := valid_session.duplicate()
	expired_session["expires_at"] = "2000-01-01T00:00:00Z"
	assert_true(not ControlPlaneClient.is_valid_session_response(expired_session), "expired session response is rejected")


func test_reconfiguration_discards_the_previous_session_expiry() -> void:
	var client := ControlPlaneClient.new()
	client.session_expires_at = "1970-01-01T00:00:01Z"
	assert_true(client.configure("https://match.example", "new-session:opaque-token"), "new session configures successfully")
	assert_eq(client.session_expires_at, "", "new credentials do not inherit the old expiry")


func test_websocket_event_validation_requires_contract_specific_fields() -> void:
	var envelope := {"event": "state_changed", "revision": 1, "resource_id": "ticket_123456789", "occurred_at": "2026-08-31T12:00:00Z", "state": "QUEUED"}
	assert_true(ControlPlaneClient._valid_websocket_event(envelope), "valid state event is accepted")
	var accepted := envelope.duplicate()
	accepted["state"] = "ACCEPTED"
	assert_true(ControlPlaneClient._valid_websocket_event(accepted), "authoritative accepted queue event is accepted")
	for phase in ["ASSIGNED", "RESULT_PENDING", "COMPLETED"]:
		var lifecycle := envelope.duplicate()
		lifecycle["state"] = phase
		assert_true(ControlPlaneClient._valid_websocket_event(lifecycle), "post-match queue event is accepted: " + phase)
	var bad_state := envelope.duplicate()
	bad_state["state"] = "SECRET"
	assert_true(not ControlPlaneClient._valid_websocket_event(bad_state), "unknown state event is rejected")
	var assignment := {"event": "assignment_changed", "revision": 0, "resource_id": "match_1234567890", "occurred_at": "2026-08-31T12:00:00Z", "match_id": "match_1234567890", "server_id": "server_123456789"}
	assert_true(ControlPlaneClient._valid_websocket_event(assignment), "complete assignment event is accepted")
	var short_assignment_id := assignment.duplicate()
	short_assignment_id["server_id"] = "server-1"
	assert_true(not ControlPlaneClient._valid_websocket_event(short_assignment_id), "short assignment server id is rejected")
	assignment.erase("server_id")
	assert_true(not ControlPlaneClient._valid_websocket_event(assignment), "incomplete assignment event is rejected")
	var fractional := envelope.duplicate()
	fractional["revision"] = 1.5
	assert_true(not ControlPlaneClient._valid_websocket_event(fractional), "fractional event revision is rejected")
	var negative := envelope.duplicate()
	negative["revision"] = -1
	assert_true(not ControlPlaneClient._valid_websocket_event(negative), "negative event revision is rejected")
	var malformed_time := envelope.duplicate()
	malformed_time["occurred_at"] = "yesterday"
	assert_true(not ControlPlaneClient._valid_websocket_event(malformed_time), "malformed event timestamp is rejected")
	var short_resource := envelope.duplicate()
	short_resource["resource_id"] = "short"
	assert_true(not ControlPlaneClient._valid_websocket_event(short_resource), "short resource identifier is rejected")
	var unsafe_resource := envelope.duplicate()
	unsafe_resource["resource_id"] = "ticket_123456789/secret"
	assert_true(not ControlPlaneClient._valid_websocket_event(unsafe_resource), "resource identifier with separators is rejected")
	var match_state := {"event": "state_changed", "revision": 4, "resource_id": "match_1234567890", "occurred_at": "2026-08-31T12:00:00Z", "state": "ASSIGNMENT_READY", "match_id": "match_1234567890"}
	assert_true(ControlPlaneClient._valid_websocket_event(match_state), "match-scoped lifecycle event is accepted")
	match_state["match_id"] = "different_match_123"
	assert_true(not ControlPlaneClient._valid_websocket_event(match_state), "match lifecycle identity must equal its resource identity")


func test_match_assignment_ready_event_recovers_ticket_and_schedules_assignment_fetch() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.state.begin_queue("ticket_assignment_1", "casual"), "queue setup succeeds")
	client._operation = "queue_heartbeat"
	var event := {"event": "state_changed", "revision": 4, "resource_id": "match_assignment_1", "occurred_at": "2026-08-31T12:00:00Z", "state": "ASSIGNMENT_READY", "match_id": "match_assignment_1"}
	client._handle_websocket_packet(JSON.stringify(event).to_utf8_buffer())
	assert_eq(client._pending_resync_resource_id, "ticket_assignment_1", "match event requests authoritative ticket recovery")
	assert_eq(client._pending_assignment_match_id, "match_assignment_1", "assignment lookup no longer depends on a prior assignment GET")
	assert_eq(client.state.ticket_id, "ticket_assignment_1", "match resource is never projected as a ticket identity")
	client.free()


func test_recovered_assignment_ready_ticket_schedules_fetch_after_missed_revisions() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	client.player_id = "player_1234567890"
	client.state.begin_queue("ticket_assignment_1", "casual")
	assert_true(client.state.apply_ticket_update({"ticket_id": "ticket_assignment_1", "revision": 1, "state": "PROPOSED", "playlist": "casual"}), "proposal setup applies")
	client._operation = "queue_recover"
	var recovered := {"ticket_id": "ticket_assignment_1", "player_id": "player_1234567890", "match_id": "match_assignment_1", "playlist": "casual", "state": "ASSIGNMENT_READY", "revision": 5, "enqueued_at": "2026-08-31T12:00:00Z", "expires_at": "2026-08-31T12:01:00Z"}
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify(recovered).to_utf8_buffer())
	assert_eq(client.state.phase, MatchmakingState.ASSIGNMENT_READY, "REST recovery applies a forward authoritative snapshot")
	assert_eq(client._pending_assignment_match_id, "match_assignment_1", "recovered snapshot supplies the assignment lookup key")
	client.free()


func test_websocket_reconnect_defers_recovery_while_http_mutation_is_in_flight() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.state.begin_queue("ticket-reconnect", "casual"), "queue setup succeeds")
	client._operation = "queue_heartbeat"
	client._set_websocket_status("CONNECTED")
	assert_eq(client._pending_resync_resource_id, "ticket-reconnect", "reconnect recovery is retained until the mutation completes")
	client.free()


func test_transient_rest_recovery_failure_does_not_end_matchmaking() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	client.state.begin_queue("ticket_recovery_123", "casual")
	client._operation = "queue_recover"
	client._on_request_completed(HTTPRequest.RESULT_CANT_CONNECT, 0, PackedStringArray(), PackedByteArray())
	assert_eq(client.state.phase, MatchmakingState.QUEUED, "network failure during recovery keeps the active search")
	assert_true(client.state.message.contains("retrying"), "recovery failure remains visible and retryable")
	client._operation = "proposal_recover"
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), "[]".to_utf8_buffer())
	assert_eq(client.state.phase, MatchmakingState.QUEUED, "malformed transient recovery response does not become terminal")
	client.free()


func test_resync_of_terminal_proposal_recovers_the_ticket() -> void:
	assert_eq(ControlPlaneClient.resync_target("proposal-terminal-resync", "ticket-terminal-resync", "proposal-terminal-resync", false), "ticket-terminal-resync", "terminal proposal resync targets the requeued ticket")
	assert_eq(ControlPlaneClient.resync_target("proposal-terminal-resync", "ticket-terminal-resync", "proposal-terminal-resync", true), "proposal-terminal-resync", "open proposal resync retains the proposal target")


func test_retryable_mutation_policy_only_retries_safe_failures() -> void:
	assert_true(ControlPlaneClient.is_retryable_mutation_response(0), "transport failure is retryable")
	assert_true(ControlPlaneClient.is_retryable_mutation_response(408), "request timeout is retryable")
	assert_true(ControlPlaneClient.is_retryable_mutation_response(429), "rate limit is retryable")
	assert_true(ControlPlaneClient.is_retryable_mutation_response(503), "server failure is retryable")
	assert_true(not ControlPlaneClient.is_retryable_mutation_response(401), "authentication failure is not blindly replayed")
	assert_true(not ControlPlaneClient.is_retryable_mutation_response(409), "revision/idempotency conflict is not blindly replayed")


# multiplayer-next.md 8.43 named "duplicate-action recovery beyond proposals"
# and "regional outage retry UI" as remaining. Both mechanisms (can_retry_last_mutation /
# retry_last_mutation, and matchmaking.gd's queue button falling back to them)
# already existed in the client, but had no test coverage proving the
# generic (non-proposal) mutation path actually recovers end to end -- only
# is_retryable_mutation_response's pure classification was covered above.
func test_generic_mutation_retry_recovers_after_a_transient_failure() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.configure("https://match.example", "session-id:opaque-token"), "client configures")
	assert_true(client.state.begin_queue("ticket-retry-generic", "casual"), "queue setup succeeds")
	# Simulate what _start_request itself would already have recorded before
	# a real network call was in flight, the same way the pre-existing
	# conflict-handler tests above set _operation directly.
	client._operation = "queue_heartbeat"
	client._last_mutation = {"operation": "queue_heartbeat", "method": HTTPClient.METHOD_POST, "path": "/v1/queue/ticket-retry-generic/heartbeat", "payload": {"revision": 0}, "key": "heartbeat-retry-key-123456", "expected_revision": 0}
	assert_true(not client.can_retry_last_mutation(), "a mutation still in flight is never offered as retryable")

	# A regional outage: the transport itself failed rather than returning a
	# decoded HTTP status -- exactly the "regional outage retry" case. This
	# transition is the actual previously-uncovered boundary: nothing tested
	# that a generic (non-proposal) mutation ever becomes retryable at all,
	# only is_retryable_mutation_response's pure classification above.
	# retry_last_mutation's own dispatch is not exercised here: it reaches
	# HTTPRequest.request(), which needs the node inside a live SceneTree,
	# and test_runner.tscn runs every test method from within its own
	# _ready() while the tree is still being built, so that is out of reach
	# for this harness -- the "not offered at all" boundary below covers the
	# part of retry_last_mutation this environment can exercise safely.
	client._on_request_completed(HTTPRequest.RESULT_CANT_CONNECT, 0, PackedStringArray(), PackedByteArray())
	assert_true(client.can_retry_last_mutation(), "a transport failure on a non-proposal mutation is offered as retryable")
	client.free()


func test_generic_mutation_retry_is_not_offered_for_unsafe_failures() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.configure("https://match.example", "session-id:opaque-token"), "client configures")
	assert_true(client.state.begin_queue("ticket-retry-unsafe", "casual"), "queue setup succeeds")
	client._operation = "queue_cancel"
	client._last_mutation = {"operation": "queue_cancel", "method": HTTPClient.METHOD_POST, "path": "/v1/queue/ticket-retry-unsafe/cancel", "payload": {}, "key": "cancel-retry-key-123456", "expected_revision": 0}
	# A 409 is a revision/idempotency conflict, not a transient failure --
	# should_recover_queue_after_conflict owns recovering it instead, and a
	# blind resend would replay a mutation whose precondition already failed.
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 409, PackedStringArray(), JSON.stringify({"error": "revision conflict"}).to_utf8_buffer())
	assert_true(not client.can_retry_last_mutation(), "a conflict response is never offered as a blind retry")
	assert_eq(client.retry_last_mutation(), ERR_INVALID_DATA, "retrying when not offered fails closed rather than resending a stale mutation")
	client.free()


# connect_to_assignment() already existed, fully validated, with its own
# assignment_connection_started/assignment_connection_failed signals -- but
# nothing anywhere in the client ever called it. A player reaching the
# ASSIGNED phase (server confirms the complete roster) with a fetched, fresh
# assignment would simply sit on "Your match server is ready" forever,
# because the transport was never actually started. This is the wiring fix,
# not just new test coverage for existing behavior.
func test_client_starts_the_transport_once_the_ticket_reaches_assigned() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.configure("https://match.example", "session-id:opaque-token"), "client configures")
	client.player_id = "player_1234567890"
	assert_true(client.state.begin_queue("ticket-connect-ready", "casual"), "queue setup succeeds")

	# The assignment fetch (triggered independently, earlier, by
	# ASSIGNMENT_READY) has already completed by the time ASSIGNED arrives --
	# the common case.
	client._operation = "assignment"
	var assignment_payload := {"match_id": "match_connect_1234567890", "server_id": "server_connect_1234567890", "player_id": "player_1234567890", "slot": 0, "expires_at": "2099-08-31T12:00:00Z", "protocol_version": 1, "transport": "enet", "endpoint": "127.0.0.1:65500", "join_authorisation": "opaque-join-token"}
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify(assignment_payload).to_utf8_buffer())
	assert_true(client.assignment.available, "assignment fetch applies")

	var connect_started := [false]
	var connect_failed := [false]
	client.assignment_connection_started.connect(func(_a): connect_started[0] = true)
	client.assignment_connection_failed.connect(func(_d): connect_failed[0] = true)

	client._operation = "queue_recover"
	var ticket_payload := {"ticket_id": "ticket-connect-ready", "player_id": "player_1234567890", "playlist": "casual", "revision": 5, "state": "ASSIGNED", "match_id": "match_connect_1234567890", "enqueued_at": "2026-08-31T12:00:00Z", "expires_at": "2099-08-31T12:00:00Z"}
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify(ticket_payload).to_utf8_buffer())

	# connect_to_assignment() itself calls state.mark_connecting() as part of a
	# successful attempt, so by the time control returns here phase has
	# already advanced past ASSIGNED to CONNECTING -- that advancement is
	# itself the proof the connect was actually attempted.
	assert_eq(client.state.phase, MatchmakingState.CONNECTING, "reaching ASSIGNED with a ready assignment actually started the transport, rather than sitting idle")
	assert_true(connect_started[0] or connect_failed[0], "connect_to_assignment's own signal fired")
	assert_true(client._pending_connect_match_id.is_empty(), "an attempted connect is not left pending")

	# A duplicate/replayed ASSIGNED event for the same match (e.g. an
	# at-least-once outbox redelivery) must not fire a second connection
	# attempt. Called directly against the guarded function rather than
	# through another full _on_request_completed round-trip: phase has
	# already moved on to CONNECTING, so both of _connect_when_assigned's own
	# guards (phase != ASSIGNED, and the _connect_attempted_match_id match)
	# now independently refuse a second attempt for this match.
	connect_started[0] = false
	connect_failed[0] = false
	client._connect_when_assigned("match_connect_1234567890")
	assert_true(not connect_started[0] and not connect_failed[0], "a duplicate connect attempt for an already-attempted match is not reattempted")

	NetworkManager.shutdown()
	client.free()


func test_client_defers_the_connect_until_the_assignment_fetch_completes() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.configure("https://match.example", "session-id:opaque-token"), "client configures")
	assert_true(client.state.begin_queue("ticket-connect-deferred", "casual"), "queue setup succeeds")

	var connect_started := [false]
	var connect_failed := [false]
	client.assignment_connection_started.connect(func(_a): connect_started[0] = true)
	client.assignment_connection_failed.connect(func(_d): connect_failed[0] = true)

	# ASSIGNED arrives before the assignment fetch (triggered earlier by
	# ASSIGNMENT_READY) has actually completed -- the ordering the deferred
	# path exists for. client.assignment is still the default, unavailable one.
	client._operation = "queue_recover"
	var ticket_payload := {"ticket_id": "ticket-connect-deferred", "player_id": "player_1234567890", "playlist": "casual", "revision": 5, "state": "ASSIGNED", "match_id": "match_deferred_1234567890", "enqueued_at": "2026-08-31T12:00:00Z", "expires_at": "2099-08-31T12:00:00Z"}
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify(ticket_payload).to_utf8_buffer())

	assert_eq(client.state.phase, MatchmakingState.ASSIGNED, "ticket state machine still reaches ASSIGNED")
	assert_eq(client._pending_connect_match_id, "match_deferred_1234567890", "the connect attempt is deferred until the assignment is actually available")
	assert_true(not connect_started[0] and not connect_failed[0], "no connection attempt is made before the assignment is ready -- nothing to connect to yet")
	client.free()


# Covers §8.43's "failed reconnect UX": connect_to_assignment()'s own
# synchronous failures previously only emitted assignment_connection_failed,
# a signal nothing in the client listened to -- state.phase stayed stuck at
# ASSIGNED, the UI kept showing "Your match server is ready" forever, and
# there was no way back to a fresh search.
func test_synchronous_assignment_connection_failure_surfaces_as_a_failed_search() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.state.begin_queue("ticket-connect-unavailable", "casual"), "queue setup succeeds")
	# client.assignment is still the default, unavailable one.
	var err := client.connect_to_assignment()
	assert_eq(err, ERR_UNAUTHORIZED, "connect fails closed when the assignment isn't ready")
	assert_eq(client.state.phase, MatchmakingState.FAILED, "the failure is surfaced as a failed search rather than leaving the UI stuck at ASSIGNED")
	assert_true(client.state.message.to_lower().contains("unavailable") or client.state.message.to_lower().contains("expired"), "the failure detail is retained: %s" % client.state.message)
	client.free()


# The likelier real-world failure than the synchronous one above:
# NetworkManager.join() returns OK immediately (the attempt started), but the
# actual ENet handshake fails asynchronously later -- unreachable server,
# refused connection, ENet's own ~5s connect timeout. This is exactly the gap
# main_menu.gd's own _on_connection_failed exists to cover for the
# direct-join flow; nothing covered it for a matchmaking-driven connect.
func test_async_network_connection_failure_after_assignment_ready_surfaces_as_a_failed_search() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.configure("https://match.example", "session-id:opaque-token"), "client configures")
	client.player_id = "player_1234567890"
	assert_true(client.state.begin_queue("ticket-connect-asyncfail", "casual"), "queue setup succeeds")
	client._operation = "assignment"
	var assignment_payload := {"match_id": "match_asyncfail_1234567890", "server_id": "server_asyncfail_1234567890", "player_id": "player_1234567890", "slot": 0, "expires_at": "2099-08-31T12:00:00Z", "protocol_version": 1, "transport": "enet", "endpoint": "127.0.0.1:65501", "join_authorisation": "opaque-join-token"}
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify(assignment_payload).to_utf8_buffer())
	client._operation = "queue_recover"
	var ticket_payload := {"ticket_id": "ticket-connect-asyncfail", "player_id": "player_1234567890", "playlist": "casual", "revision": 5, "state": "ASSIGNED", "match_id": "match_asyncfail_1234567890", "enqueued_at": "2026-08-31T12:00:00Z", "expires_at": "2099-08-31T12:00:00Z"}
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify(ticket_payload).to_utf8_buffer())
	assert_eq(client.state.phase, MatchmakingState.CONNECTING, "the transport attempt started")

	NetworkManager.connection_failed.emit()
	assert_eq(client.state.phase, MatchmakingState.FAILED, "the async handshake failure is surfaced rather than leaving CONNECTING stuck forever")

	NetworkManager.shutdown()
	client.free()


func test_network_connection_failure_is_ignored_outside_a_matchmaking_driven_connect() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.state.begin_queue("ticket-unrelated-failure", "casual"), "queue setup succeeds")
	# state.phase is QUEUED, not CONNECTING -- this connection_failed belongs
	# to something else (e.g. main_menu.gd's own direct-join flow) and must
	# not be misattributed to matchmaking.
	NetworkManager.connection_failed.emit()
	assert_eq(client.state.phase, MatchmakingState.QUEUED, "an unrelated connection_failed does not fail an active queue search")
	client.free()


func test_rest_resource_identifiers_use_the_opaque_contract_shape() -> void:
	assert_true(ControlPlaneClient.is_valid_resource_id("ticket_1234567890"), "contract-sized resource id is accepted")
	assert_true(not ControlPlaneClient.is_valid_resource_id("ticket-1"), "short resource id is rejected")
	assert_true(not ControlPlaneClient.is_valid_resource_id("ticket_1234567890/path"), "path separator is rejected")


func test_queue_revision_conflicts_schedule_authoritative_recovery() -> void:
	assert_true(ControlPlaneClient.should_recover_queue_after_conflict("queue_heartbeat", 409, "ticket-1"), "stale heartbeat recovers the queue ticket")
	assert_true(ControlPlaneClient.should_recover_queue_after_conflict("queue_cancel", 409, "ticket-1"), "stale cancellation recovers the queue ticket")
	assert_true(not ControlPlaneClient.should_recover_queue_after_conflict("queue_create", 409, "ticket-1"), "create conflict uses its own idempotency path")
	assert_true(not ControlPlaneClient.should_recover_queue_after_conflict("queue_heartbeat", 503, "ticket-1"), "transient outage remains retryable instead of being treated as a revision conflict")
	assert_true(not ControlPlaneClient.should_recover_queue_after_conflict("queue_cancel", 409, ""), "missing ticket cannot trigger recovery")


func test_queue_conflict_response_handler_defers_ticket_recovery() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.state.begin_queue("ticket-handler", "casual"), "queue setup succeeds")
	client._operation = "queue_heartbeat"
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 409, PackedStringArray(), JSON.stringify({"error": "revision conflict"}).to_utf8_buffer())
	assert_eq(client._pending_resync_resource_id, "ticket-handler", "heartbeat conflict queues ticket recovery")
	client._operation = "queue_cancel"
	client._pending_resync_resource_id = ""
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 409, PackedStringArray(), JSON.stringify({"error": "revision conflict"}).to_utf8_buffer())
	assert_eq(client._pending_resync_resource_id, "ticket-handler", "cancel conflict queues ticket recovery")
	client.free()


# Covers §8.43's "version-mismatch-specific client messaging": a 426 Upgrade
# Required on queue_create (the server-side floor added alongside this test)
# must surface a distinct, actionable message rather than the server's raw
# generic error string, and must not offer a futile "Retry Search" -- the
# same client build will fail again identically every time.
func test_outdated_client_receives_a_distinct_message_and_no_retry_offer() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	assert_true(client.configure("https://match.example", "session-id:opaque-token"), "client configures")
	client._operation = "queue_create"
	client._last_queue_create = {"ticket_id": "ticket-outdated", "playlist": "casual", "client_build": "build-1", "protocol_version": 4, "key": "outdated-key-123456"}
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, HTTPClient.RESPONSE_UPGRADE_REQUIRED, PackedStringArray(), JSON.stringify({"error": "client_outdated"}).to_utf8_buffer())
	assert_eq(client.state.phase, MatchmakingState.FAILED, "outdated client fails the search")
	assert_true(client.state.message.to_lower().contains("update"), "message tells the player to update rather than repeating the raw server error: %s" % client.state.message)
	assert_true(not client.can_retry_queue_create(), "retrying with the same outdated client build is never offered")
	client.free()


func test_rest_responses_reject_malformed_resource_identifiers() -> void:
	var client := ControlPlaneClient.new()
	client._ready()
	client._operation = "queue_recover"
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify({"ticket_id": "short", "playlist": "casual", "revision": 0, "state": "QUEUED"}).to_utf8_buffer())
	assert_eq(client.state.phase, MatchmakingState.FAILED, "malformed queue response is not projected")
	client._operation = "proposal_recover"
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 200, PackedStringArray(), JSON.stringify({"proposal_id": "proposal/unsafe", "revision": 0, "state": "OPEN"}).to_utf8_buffer())
	assert_eq(client.state.phase, MatchmakingState.FAILED, "malformed proposal response is not projected")
	client.free()


func test_queue_response_requires_the_complete_contract_shape() -> void:
	var valid := {"ticket_id": "ticket_1234567890", "player_id": "player_1234567890", "playlist": "casual", "state": "QUEUED", "revision": 0, "enqueued_at": "2026-08-31T12:00:00Z", "expires_at": "2026-08-31T12:01:00Z"}
	assert_true(ControlPlaneClient._valid_queue_response(valid), "complete queue response is accepted")
	var missing_expiry := valid.duplicate()
	missing_expiry.erase("expires_at")
	assert_true(not ControlPlaneClient._valid_queue_response(missing_expiry), "queue response without expiry is rejected")
	var fractional_revision := valid.duplicate()
	fractional_revision["revision"] = 1.5
	assert_true(not ControlPlaneClient._valid_queue_response(fractional_revision), "fractional queue revision is rejected")
	var malformed_player := valid.duplicate()
	malformed_player["player_id"] = "player/unsafe"
	assert_true(not ControlPlaneClient._valid_queue_response(malformed_player), "unsafe queue player id is rejected")
	var assigned := valid.duplicate()
	assigned["state"] = "ASSIGNMENT_READY"
	assigned["match_id"] = "match_1234567890"
	assert_true(ControlPlaneClient._valid_queue_response(assigned), "recovered assignment-ready ticket carries its match lookup identity")
	var premature_match := valid.duplicate()
	premature_match["match_id"] = "match_1234567890"
	assert_true(not ControlPlaneClient._valid_queue_response(premature_match), "pre-match ticket cannot smuggle a match identity")
	assigned["match_id"] = "match/unsafe"
	assert_true(not ControlPlaneClient._valid_queue_response(assigned), "unsafe recovered match identity is rejected")
	var proposed := valid.duplicate()
	proposed["state"] = "PROPOSED"
	proposed["proposal_id"] = "proposal_12345678"
	assert_true(ControlPlaneClient._valid_queue_response(proposed), "recovered proposed ticket carries its proposal lookup identity")
	var client := ControlPlaneClient.new()
	client._ready()
	client.state.begin_queue("ticket_1234567890", "casual")
	client._queue_proposal_if_ready(proposed)
	assert_eq(client._pending_proposal_id, "proposal_12345678", "recovered proposal is queued for authoritative fetch")
	assert_eq(client.state.proposal_id, "proposal_12345678", "recovered proposal identity becomes the active projection")
	client.free()


func test_proposal_response_requires_structured_unique_participants() -> void:
	var base := {"proposal_id": "proposal_1234567890", "expires_at": "2099-08-31T12:00:00Z", "participants": [
		{"player_id": "player_1234567890", "response": "PENDING", "team": 0, "slot": 0},
		{"player_id": "player_1234567891", "response": "PENDING", "team": 1, "slot": 3}
	]}
	assert_true(ControlPlaneClient._valid_proposal_response(base), "structured proposal participants are accepted")
	var duplicate := base.duplicate(true)
	duplicate["participants"][1]["player_id"] = "player_1234567890"
	assert_true(not ControlPlaneClient._valid_proposal_response(duplicate), "duplicate participant identity is rejected")
	var fractional_slot := base.duplicate(true)
	fractional_slot["participants"][0]["slot"] = 0.5
	assert_true(not ControlPlaneClient._valid_proposal_response(fractional_slot), "fractional participant slot is rejected")
	var malformed_expiry := base.duplicate(true)
	malformed_expiry["expires_at"] = "tomorrow"
	assert_true(not ControlPlaneClient._valid_proposal_response(malformed_expiry), "malformed proposal expiry is rejected")
	var missing_expiry := base.duplicate(true)
	missing_expiry.erase("expires_at")
	assert_true(not ControlPlaneClient._valid_proposal_response(missing_expiry), "missing proposal expiry is rejected")
	assert_true(int(ControlPlaneClient.normalize_proposal(base)["expires_at_unix"]) > 0, "proposal expiry is normalized")


func test_assignment_endpoint_split_never_accepts_url_or_bad_port() -> void:
	var endpoint := ControlPlaneClient._split_assignment_endpoint("127.0.0.1:31001")
	assert_eq(endpoint["host"], "127.0.0.1", "assignment host is separated from the port")
	assert_eq(endpoint["port"], 31001, "assignment port is parsed as an integer")
	for unsafe in ["127.0.0.1", "127.0.0.1:0", "127.0.0.1:65536", "127.0.0.1:31001/path", "https://127.0.0.1:31001"]:
		assert_true(ControlPlaneClient._split_assignment_endpoint(unsafe).is_empty(), "unsafe endpoint is rejected: %s" % unsafe)


func test_ranked_profile_is_backend_display_data_and_rejects_unsafe_values() -> void:
	var profile := RankedProfileState.new()
	assert_true(profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 3, "tier": "GOLD", "provisional": true, "season_id": "season_1234567890"}), "valid profile applies")
	assert_eq(profile.display_text(), "Provisional · 3 ranked games", "provisional status overrides tier presentation")
	assert_true(not profile.apply({"rating": -1.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 3, "tier": "GOLD", "provisional": false}), "negative rating is rejected")
	assert_true(not profile.available, "unsafe response is not displayed")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 3, "tier": "", "provisional": false}), "empty tier is rejected")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 3, "tier": "MASTER", "provisional": false}), "unknown tier is rejected")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 3, "tier": "GOLD", "provisional": "false"}), "string boolean is rejected")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 3.5, "tier": "GOLD", "provisional": false}), "fractional ranked games is rejected")


func test_ranked_profile_projects_and_bounds_season_countdown() -> void:
	var profile := RankedProfileState.new()
	assert_true(profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 10, "tier": "GOLD", "provisional": false, "season_id": "season_1234567890", "season_ends_at": "1970-01-03T00:00:00Z"}), "season end applies")
	assert_true(profile.display_text(1000).contains("Season ends in 2d"), "countdown rounds up remaining season time")
	assert_true(profile.display_text(300000).contains("Season ends in 0d"), "expired season countdown is clamped")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 10, "tier": "GOLD", "provisional": false, "season_ends_at": "not-a-timestamp"}), "malformed season expiry is rejected")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 10, "tier": "GOLD", "provisional": false, "season_ends_at": 123}), "non-string season expiry is rejected")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 10, "tier": "GOLD", "provisional": false, "season_id": "short"}), "short season identifier is rejected")
	assert_true(not profile.apply({"rating": 1500.0, "rd": 200.0, "volatility": 0.06, "ranked_games": 10, "tier": "GOLD", "provisional": false, "season_id": 123}), "non-string season identifier is rejected")


# The client had no probe support at all, so even with the backend wired a real
# player could never acquire the RTT evidence the matcher requires.
func test_probe_region_validation_rejects_unknown_regions() -> void:
	assert_true(ControlPlaneClient.is_valid_probe_region("EU"), "EU is a placement region")
	assert_true(ControlPlaneClient.is_valid_probe_region("NA"), "NA is a placement region")
	for region in ["", "eu", "APAC", "EU/NA", "../EU"]:
		assert_true(not ControlPlaneClient.is_valid_probe_region(region), "rejects %s" % region)


func test_probe_requests_require_a_session() -> void:
	var client = ControlPlaneClient.new()
	client.base_url = "http://127.0.0.1:8080"
	client.access_token = ""
	assert_eq(client.request_probe_challenge("EU"), ERR_UNAUTHORIZED, "probing without a session is refused")
	assert_eq(client.submit_probe_answer("EU", "bm9uY2U=", "bG9j"), ERR_UNAUTHORIZED, "answering without a session is refused")
	client.free()


func test_probe_answer_rejects_empty_nonce_or_location() -> void:
	var client = ControlPlaneClient.new()
	client.base_url = "http://127.0.0.1:8080"
	client.access_token = "session-1234567890:token-1234567890"
	assert_eq(client.submit_probe_answer("EU", "", "bG9j"), ERR_INVALID_PARAMETER, "an empty nonce is refused")
	assert_eq(client.submit_probe_answer("EU", "bm9uY2U=", ""), ERR_INVALID_PARAMETER, "an empty location is refused")
	assert_eq(client.request_probe_challenge("APAC"), ERR_INVALID_PARAMETER, "an unknown region is refused")
	client.free()


func test_opaque_location_payload_is_never_empty() -> void:
	# The backend rejects an empty opaque location, and without a Steam runtime
	# there is nothing real to report -- but the RTT the backend measures is
	# what actually drives placement, so the probe must still be answerable.
	var payload := ControlPlaneClient.opaque_location_payload()
	assert_true(not payload.is_empty(), "a probe answer always carries a location blob")
	assert_true(not Marshalls.base64_to_raw(payload).is_empty(), "the location blob is valid base64")


func test_probe_challenge_response_without_a_nonce_is_a_failure() -> void:
	var client = ControlPlaneClient.new()
	client.base_url = "http://127.0.0.1:8080"
	client.access_token = "session-1234567890:token-1234567890"
	var failures: Array = []
	client.request_failed.connect(func(operation: String, _code: int, detail: String): failures.append([operation, detail]))
	client._operation = "probe_challenge_EU"
	client._on_request_completed(HTTPRequest.RESULT_SUCCESS, 201, PackedStringArray(), JSON.stringify({"region": "EU"}).to_utf8_buffer())
	assert_eq(failures.size(), 1, "a challenge with no nonce is reported as a failure")
	client.free()


# The game started with an empty token against a loopback default and no
# production code ever called configure() or login_steam(), so every
# matchmaking request failed ERR_UNAUTHORIZED before reaching the network.
func test_has_session_reflects_token_and_expiry() -> void:
	var client = ControlPlaneClient.new()
	assert_true(not client.has_session(), "a fresh client has no session")
	client.access_token = "session-1234567890:token-1234567890"
	client.session_expires_at = "2099-01-01T00:00:00Z"
	assert_true(client.has_session(), "a valid unexpired token is a session")
	client.session_expires_at = "2000-01-01T00:00:00Z"
	assert_true(not client.has_session(), "an expired token is not a session")
	client.free()


func test_configured_base_url_falls_back_to_the_development_default() -> void:
	# Release builds set COSMIC_CLASH_CONTROL_PLANE_URL; without it the
	# loopback default keeps local development working.
	var resolved := ControlPlaneClient.configured_base_url()
	assert_true(ControlPlaneClient.is_valid_base_url(resolved), "the resolved endpoint is always usable")
	if OS.get_environment(ControlPlaneClient.BASE_URL_ENV).strip_edges().is_empty():
		assert_eq(resolved, ControlPlaneClient.DEFAULT_BASE_URL, "falls back to the development default")