import { PRODUCTION_WIDGET_RUNTIME_ENDPOINTS } from "../production-runtime-endpoints.js";
import type { PublicCommandPayload } from "./sdk-types.js";

export { PRODUCTION_WIDGET_RUNTIME_ENDPOINTS };

export const TELEMETRY_EVENTS = {
	INSTANCE_READY: "instance_ready",
	VIEW_DISPLAYED: "view_displayed",
	VIEW_CLOSED: "view_closed",
	FLOW_DISPLAYED: "flow_displayed",
	FLOW_CLOSED: "flow_closed",
} as const;

export type TelemetryEventName =
	(typeof TELEMETRY_EVENTS)[keyof typeof TELEMETRY_EVENTS];

// Data attribute used to anchor widget styles & root element. Shared so build
// scripts, runtime code and tests stay in sync.
export const WIDGET_SELECTOR = "[data-gx-widget]" as const;

export const PARENT_ORIGIN_PARAM = "gx_parent_origin" as const;

export const PRODUCTION_WIDGET_CORE_URL =
	PRODUCTION_WIDGET_RUNTIME_ENDPOINTS.coreUrl;

/** @internal Version for the trusted host-realm open-url action event. */
export const OPEN_URL_ACTION_VERSION = 2;

/** @internal Init capability proving that this SDK instance handles open-url actions. */
export const OPEN_URL_ACTION_CAPABILITY = "gx.action.open-url.v2" as const;

/** @internal Rollout capability used with the version 1 `_blank` host event. */
export const OPEN_URL_ACTION_V1_CAPABILITY = "gx.action.open-url.v1" as const;

/**
 * @internal Capability for synchronous navigation outcome settlement by the
 * internal SDK adapter. The browser host remains client-reported and does not
 * provide trusted execution attestation.
 */
export const NAVIGATION_OUTCOME_SETTLEMENT_CAPABILITY =
	"gx.navigation.outcome-settlement.v1" as const;

// Host event names (DOM events emitted by widget for external consumption)
// Uses prefix "getuserfeedback:" for namespacing
export const HOST_EVENT_PREFIX = "getuserfeedback:" as const;

export const HOST_EVENT_KEYS = {
	INSTANCE_FLOW_LAYOUT_UPDATED: "instance:flow:layout-updated",
	INSTANCE_FLOW_STATE_CHANGED: "instance:flow:state-changed",
	INSTANCE_FLOW_STATE_CHANGED_INSTANCE: "instance:flow:state-changed:instance",
	INSTANCE_VIEW_HOST_SNAPSHOTS_CHANGED: "instance:view-host:snapshots-changed",
	INSTANCE_COMMAND_SETTLED: "instance:command:settled",
	INSTANCE_HANDLE_INVALIDATED: "instance:handle:invalidated",
	INSTANCE_OPEN_REQUESTED: "instance:open:requested",
	INSTANCE_NAVIGATION_REQUESTED: "instance:navigation:requested",
	INSTANCE_HOST_ACTION_REQUESTED: "instance:host-action:requested",
	INSTANCE_COMMAND_UNSUPPORTED: "instance:command:unsupported",
	INSTANCE_READY: "instance:ready",
	INSTANCE_BRIDGE_MOUNTED: "instance:bridge:mounted",
	INSTANCE_BRIDGE_UNMOUNTED: "instance:bridge:unmounted",
	INSTANCE_IFRAME_READY: "instance:iframe:ready",
	INSTANCE_ERROR: "instance:error",
	INSTANCE_APP_EVENT: "instance:app-event",
} as const;

type NonSdkCapabilityCommandKind =
	| "updateHostContext"
	| "emitHostSignal"
	| "instanceFeedback.capture"
	| "instanceFeedback.listMine";
type SdkCapabilityCommandKind = Exclude<
	PublicCommandPayload["kind"],
	"init" | NonSdkCapabilityCommandKind
>;

const SDK_COMMAND_CAPABILITY_BY_KIND = {
	configure: "gx.command.configure.v1",
	open: "gx.command.open.v1",
	prefetch: "gx.command.prefetch.v1",
	prerender: "gx.command.prerender.v1",
	identify: "gx.command.identify.v1",
	setContainer: "gx.command.setContainer.v1",
	close: "gx.command.close.v1",
	reset: "gx.command.reset.v1",
	setDefaultContainerPolicy: "gx.command.setDefaultContainerPolicy.v1",
	track: "gx.command.track.v1",
} as const satisfies Record<
	SdkCapabilityCommandKind,
	`gx.command.${string}.v${number}`
>;

const SDK_COMMAND_CAPABILITIES = [
	SDK_COMMAND_CAPABILITY_BY_KIND.configure,
	SDK_COMMAND_CAPABILITY_BY_KIND.open,
	SDK_COMMAND_CAPABILITY_BY_KIND.prefetch,
	SDK_COMMAND_CAPABILITY_BY_KIND.prerender,
	SDK_COMMAND_CAPABILITY_BY_KIND.identify,
	SDK_COMMAND_CAPABILITY_BY_KIND.setContainer,
	SDK_COMMAND_CAPABILITY_BY_KIND.close,
	SDK_COMMAND_CAPABILITY_BY_KIND.reset,
	SDK_COMMAND_CAPABILITY_BY_KIND.setDefaultContainerPolicy,
	SDK_COMMAND_CAPABILITY_BY_KIND.track,
] as const;

type SdkCommandCapability =
	(typeof SDK_COMMAND_CAPABILITY_BY_KIND)[keyof typeof SDK_COMMAND_CAPABILITY_BY_KIND];
type _AssertAllCommandCapabilitiesAreAnnounced =
	Exclude<
		SdkCommandCapability,
		(typeof SDK_COMMAND_CAPABILITIES)[number]
	> extends never
		? true
		: never;
type _AssertNoUnknownCommandCapabilities =
	Exclude<
		(typeof SDK_COMMAND_CAPABILITIES)[number],
		SdkCommandCapability
	> extends never
		? true
		: never;

/**
 * Stable capability tokens announced by the browser SDK during init.
 * These are versioned and namespaced to support forward-compatible negotiation.
 */
export const FLOW_LAYOUT_UPDATES_CAPABILITY =
	"gx.host.flow-layout-updates.v1" as const;

export const SDK_PROTOCOL_CAPABILITIES = [
	"gx.protocol.public.v1",
	...SDK_COMMAND_CAPABILITIES,
	NAVIGATION_OUTCOME_SETTLEMENT_CAPABILITY,
] as const;

export type SdkProtocolCapability = (typeof SDK_PROTOCOL_CAPABILITIES)[number];

export const REACT_NATIVE_WEBVIEW_TRANSPORT_CAPABILITIES = {
	LAYOUT_TRANSITION_POLICY:
		"gx.react-native.webview.layout-transition-policy.v1",
	LAYOUT_TRANSITION_SCHEDULE:
		"gx.react-native.webview.layout-transition-schedule.v1",
} as const;

export type ReactNativeWebViewTransportCapability =
	(typeof REACT_NATIVE_WEBVIEW_TRANSPORT_CAPABILITIES)[keyof typeof REACT_NATIVE_WEBVIEW_TRANSPORT_CAPABILITIES];

export const LOADER_RUNTIME_GLOBAL_KEY = "__getuserfeedback_runtime" as const;
export const LOADER_RUNTIME_PROTOCOL_VERSION = "v5" as const;

// Helper to construct full event name with prefix
export const toHostEventName = (key: string): string =>
	`${HOST_EVENT_PREFIX}${key}`;