/**
 * What a presentation reading contributes to a regression report.
 *
 * Beside `format.ts` rather than inside it for the reason `finding-record.ts` is:
 * the record types a report carries are one shape each, and a file holding every
 * shape at once is read by nobody looking for one of them.
 */
import type { Digest } from '@variance-authority/core/format';
/** How one relationship condition changed between comparable presentation readings. */
export type PresentationEffectTransition = 'introduced' | 'resolved' | 'persisted';
/** The finding-local measurement retained on one side of a presentation effect. */
export interface PresentationEffectEvidence {
    /** Finding id in the corresponding presentation report or hierarchy reading. */
    readonly finding: string;
    readonly measurements: Readonly<Record<string, number | string>>;
}
/** One relationship consequence attributable to the difference between two readings. */
export interface PresentationEffectRecord {
    readonly rule: string;
    readonly transition: PresentationEffectTransition;
    readonly owner: string;
    readonly nodes: readonly string[];
    readonly pattern?: string;
    readonly contract?: string;
    readonly before?: PresentationEffectEvidence;
    readonly after?: PresentationEffectEvidence;
}
/** Information-volume evidence kept beside relationship effects. */
export interface PresentationInformationRecord {
    readonly contentPreserved: boolean;
    readonly characters: {
        readonly before: number;
        readonly after: number;
        readonly delta: number;
    };
    readonly elements: {
        readonly before: number;
        readonly after: number;
        readonly delta: number;
    };
    readonly repeatedObjects: {
        readonly before: number;
        readonly after: number;
        readonly delta: number;
    };
}
/**
 * Presentation evidence carried by a general regression report.
 *
 * A side with no reading, or with no layout findings, is `changed`: one side has
 * evidence and the other does not. Its `because` names that side, and it has no
 * effects, because inventing a transition from one reading would turn absence
 * into evidence. Compared readings always carry `effects`, where an empty array
 * means the presentation consequence was measured and unchanged.
 */
export type PresentationSignalRecord = {
    readonly verdict: 'changed';
    /** Names the side that supplied no reading or no layout findings. */
    readonly because: string;
    readonly before?: Digest;
    readonly after?: Digest;
} | {
    readonly verdict: 'unchanged' | 'changed';
    readonly before: Digest;
    readonly after: Digest;
    readonly information: PresentationInformationRecord;
    readonly effects: readonly PresentationEffectRecord[];
};
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