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import type {
FastCanvasInput,
FastCanvasInputResult,
} from "./fast-canvas-transport";
import type { FastHudPage } from "./fast-hud-pages";
export const FAST_MAP_ZOOM_RADII = [850, 650, 500, 375, 280] as const;
export const FAST_MAP_DEFAULT_ZOOM_INDEX = 1;
export type FastHudViewMode =
| "dashboard"
| "map"
| "news"
| "todo"
| "weather"
| "ai"
| "conversate"
| "navigation";
export type FastHudViewState = {
readonly mode: FastHudViewMode;
readonly zoomIndex: number;
readonly newsIndex: number;
readonly newsPage: number;
readonly todoIndex: number;
readonly navigationIndex: number;
readonly navigationFollowsActive: boolean;
readonly aiLine: number;
readonly aiFollowsLatest: boolean;
};
export type FastHudViewContext = {
readonly newsCount: number;
readonly newsPageCounts: readonly number[];
readonly todoCount: number;
readonly maneuverCount: number;
readonly activeManeuverIndex: number;
readonly aiLineCount?: number;
};
export type FastHudEffect =
| { readonly type: "toggle-todo"; readonly index: number }
| { readonly type: "start-ai" | "interrupt-ai" | "stop-ai" }
| { readonly type: "start-conversate" | "tap-conversate" | "stop-conversate" }
| { readonly type: "scroll-conversate"; readonly delta: -1 | 1 };
export type FastHudTransition = {
readonly state: FastHudViewState;
readonly result: FastCanvasInputResult;
readonly effect?: FastHudEffect;
};
function clampIndex(index: number, count: number): number {
const lastIndex = Math.max(0, Math.floor(count) - 1);
return Math.min(Math.max(0, Math.floor(index)), lastIndex);
}
function clampZoom(index: number): number {
return clampIndex(index, FAST_MAP_ZOOM_RADII.length);
}
function newsPageCount(
context: FastHudViewContext,
newsIndex: number,
): number {
return Math.max(
1,
Math.floor(context.newsPageCounts[newsIndex] ?? 1),
);
}
function pageMode(page: FastHudPage): Exclude<FastHudViewMode, "dashboard"> {
return page === "overview" ? "map" : page;
}
function moveIndex(
state: FastHudViewState,
key: "newsIndex" | "todoIndex" | "navigationIndex" | "aiLine",
input: FastCanvasInput,
count: number,
extra: Partial<FastHudViewState> = {},
): FastHudTransition {
const delta = input === "scroll-next"
? 1
: input === "scroll-previous"
? -1
: 0;
if (delta === 0 || count <= 0) {
return { state, result: "consume" };
}
const nextIndex = clampIndex(state[key] + delta, count);
if (nextIndex === state[key]) return { state, result: "consume" };
return {
state: { ...state, ...extra, [key]: nextIndex },
result: "redraw",
};
}
export function createFastHudViewState(): FastHudViewState {
return {
mode: "dashboard",
zoomIndex: FAST_MAP_DEFAULT_ZOOM_INDEX,
newsIndex: 0,
newsPage: 0,
todoIndex: 0,
navigationIndex: 0,
navigationFollowsActive: true,
aiLine: 0,
aiFollowsLatest: true,
};
}
export function syncFastHudView(
state: FastHudViewState,
context: FastHudViewContext,
): FastHudViewState {
const activeIndex = clampIndex(
context.activeManeuverIndex,
context.maneuverCount,
);
const newsIndex = clampIndex(state.newsIndex, context.newsCount);
return {
...state,
zoomIndex: clampZoom(state.zoomIndex),
newsIndex,
newsPage: clampIndex(
state.newsPage,
newsPageCount(context, newsIndex),
),
todoIndex: clampIndex(state.todoIndex, context.todoCount),
navigationIndex: state.navigationFollowsActive
? activeIndex
: clampIndex(state.navigationIndex, context.maneuverCount),
aiLine: state.aiFollowsLatest
? clampIndex((context.aiLineCount ?? 0) - 1, context.aiLineCount ?? 0)
: clampIndex(state.aiLine, context.aiLineCount ?? 0),
};
}
export function reduceFastHudInput(
current: FastHudViewState,
page: FastHudPage,
input: FastCanvasInput,
context: FastHudViewContext,
): FastHudTransition {
if (current.mode === "dashboard") {
if (input !== "tap") return { state: current, result: "unhandled" };
const state = syncFastHudView(current, context);
const mode = pageMode(page);
return {
state: mode === "navigation"
? {
...state,
mode,
navigationIndex: clampIndex(
context.activeManeuverIndex,
context.maneuverCount,
),
navigationFollowsActive: true,
}
: mode === "ai"
? {
...state,
mode,
aiLine: clampIndex(
(context.aiLineCount ?? 0) - 1,
context.aiLineCount ?? 0,
),
aiFollowsLatest: true,
}
: { ...state, mode },
result: "redraw",
effect: mode === "ai"
? { type: "start-ai" }
: mode === "conversate"
? { type: "start-conversate" }
: undefined,
};
}
const state = current.mode === "map"
? { ...current, zoomIndex: clampZoom(current.zoomIndex) }
: current.mode === "news"
? {
...current,
newsIndex: clampIndex(current.newsIndex, context.newsCount),
newsPage: clampIndex(
current.newsPage,
newsPageCount(
context,
clampIndex(current.newsIndex, context.newsCount),
),
),
}
: current.mode === "todo"
? {
...current,
todoIndex: clampIndex(current.todoIndex, context.todoCount),
}
: current.mode === "weather" || current.mode === "ai" || current.mode === "conversate"
? current
: {
...current,
navigationIndex: current.navigationFollowsActive
? clampIndex(
context.activeManeuverIndex,
context.maneuverCount,
)
: clampIndex(
current.navigationIndex,
context.maneuverCount,
),
};
if (input === "double-tap") {
return {
state: { ...state, mode: "dashboard" },
result: "redraw",
effect: state.mode === "ai"
? { type: "stop-ai" }
: state.mode === "conversate"
? { type: "stop-conversate" }
: undefined,
};
}
if (state.mode === "map") {
if (input !== "scroll-next" && input !== "scroll-previous") {
return { state, result: "consume" };
}
const delta = input === "scroll-next" ? -1 : 1;
const zoomIndex = clampZoom(state.zoomIndex + delta);
return zoomIndex === state.zoomIndex
? { state, result: "consume" }
: { state: { ...state, zoomIndex }, result: "redraw" };
}
if (state.mode === "news") {
if (input !== "scroll-next" && input !== "scroll-previous") {
return { state, result: "consume" };
}
if (context.newsCount <= 0) return { state, result: "consume" };
if (input === "scroll-next") {
const pages = newsPageCount(context, state.newsIndex);
if (state.newsPage < pages - 1) {
return {
state: { ...state, newsPage: state.newsPage + 1 },
result: "redraw",
};
}
if (state.newsIndex >= context.newsCount - 1) {
return { state, result: "consume" };
}
return {
state: {
...state,
newsIndex: state.newsIndex + 1,
newsPage: 0,
},
result: "redraw",
};
}
if (state.newsPage > 0) {
return {
state: { ...state, newsPage: state.newsPage - 1 },
result: "redraw",
};
}
if (state.newsIndex <= 0) return { state, result: "consume" };
const newsIndex = state.newsIndex - 1;
return {
state: {
...state,
newsIndex,
newsPage: newsPageCount(context, newsIndex) - 1,
},
result: "redraw",
};
}
if (state.mode === "weather") {
return { state, result: "consume" };
}
if (state.mode === "ai") {
if (input === "tap") {
return {
state: {
...state,
aiLine: clampIndex(
(context.aiLineCount ?? 0) - 1,
context.aiLineCount ?? 0,
),
aiFollowsLatest: true,
},
result: "consume",
effect: { type: "interrupt-ai" },
};
}
if (input !== "scroll-next" && input !== "scroll-previous") {
return { state, result: "consume" };
}
const count = context.aiLineCount ?? 0;
if (count <= 0) return { state, result: "consume" };
const delta = input === "scroll-next" ? 1 : -1;
const aiLine = clampIndex(state.aiLine + delta, count);
const aiFollowsLatest = aiLine === count - 1;
if (
aiLine === state.aiLine
&& aiFollowsLatest === state.aiFollowsLatest
) {
return { state, result: "consume" };
}
return {
state: { ...state, aiLine, aiFollowsLatest },
result: "redraw",
};
}
if (state.mode === "conversate") {
if (input === "tap") {
return { state, result: "consume", effect: { type: "tap-conversate" } };
}
if (input === "scroll-next" || input === "scroll-previous") {
return {
state,
result: "consume",
effect: {
type: "scroll-conversate",
delta: input === "scroll-next" ? 1 : -1,
},
};
}
return { state, result: "consume" };
}
if (state.mode === "todo") {
if (input === "tap") {
return context.todoCount <= 0
? { state, result: "consume" }
: {
state,
result: "consume",
effect: { type: "toggle-todo", index: state.todoIndex },
};
}
return moveIndex(
state,
"todoIndex",
input,
context.todoCount,
);
}
if (input === "tap") {
if (context.maneuverCount <= 0) {
return { state, result: "consume" };
}
const navigationIndex = clampIndex(
context.activeManeuverIndex,
context.maneuverCount,
);
if (
navigationIndex === state.navigationIndex
&& state.navigationFollowsActive
) {
return { state, result: "consume" };
}
return {
state: {
...state,
navigationIndex,
navigationFollowsActive: true,
},
result: "redraw",
};
}
return moveIndex(
state,
"navigationIndex",
input,
context.maneuverCount,
{ navigationFollowsActive: false },
);
}