/**
 * Normalized cell and stable encoding types.
 *
 * These types are the foundation for cross-runtime fingerprinting and event
 * identity. They contain no Google SDK, SQLite, or platform-specific types.
 */
import { NORMALIZED_CELL_KINDS, type CellObservationKind } from "./constants.js";
import type { StableCodecDateValue, StableCodecValue } from "@hikoutei/kohkai";
import type { Presence } from "../state/types.js";
export type { CellObservationKind, NormalizedCellKind } from "./constants.js";
/** A date encoded as a fixed-width UTC ISO-8601 string. */
export type DateValue = StableCodecDateValue;
/**
 * A normalized scalar value that can be deterministically encoded.
 *
 * `null` represents an empty cell. An explicit empty string is
 * `{ kind: "string", value: "" }`.
 */
export type NormalizedCell = null | {
    readonly kind: typeof NORMALIZED_CELL_KINDS.STRING;
    readonly value: string;
} | {
    readonly kind: typeof NORMALIZED_CELL_KINDS.NUMBER;
    readonly value: number;
} | {
    readonly kind: typeof NORMALIZED_CELL_KINDS.BOOLEAN;
    readonly value: boolean;
} | DateValue;
/**
 * Physical Sheet metadata retained by the internal observation/provider path.
 * This compatibility type is intentionally not part of the public root API.
 */
export interface CellObservation {
    readonly cellKind: CellObservationKind;
    readonly normalizedCell: NormalizedCell;
    readonly formulaHash: Presence<string>;
    readonly mergeRange: Presence<string>;
    readonly errorCode: Presence<string>;
}
/**
 * Any value that stable_encode_v1 can encode: scalars, arrays, dates, and
 * objects with string keys. Objects with `kind: "date"` are encoded as dates,
 * not as plain objects.
 */
export type StableValue = StableCodecValue;
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