import { TuiPlugin } from '@opencode-ai/plugin/tui';

/** Any part-like object. `object` (not `{ metadata?: unknown }`) so metadata-less SDK Part variants stay assignable. */
type CreditPart = object;
/** Minimal message shape; SDK `Message` is assignable. */
interface CreditMessage {
    readonly id: string;
    readonly role: string;
}
/** One part's credit metadata: the turn total plus the SDK-reported unit. */
interface PartCredits {
    credits: number;
    unit?: string;
}
/** Session-wide rollup. `unit` stays undefined until metadata reports one. */
interface SessionCredits {
    total: number;
    unit?: string;
    /**
     * True once any assistant message carried kiro credit metadata. Lets the view pick credits over the
     * "$X spent" fallback, since a 0-credit kiro turn is indistinguishable from no metadata by `total` alone.
     */
    present: boolean;
}
/** Read `{ kiro: { credits, creditsUnit } }` from a part; only finite numeric credits count. */
declare function readPartCredits(part: CreditPart): PartCredits | undefined;
/** One message's credits, deduped by the last-carrier-wins rule (parts never summed); unit from the most recent carrier. */
declare function messageCredits(parts: ReadonlyArray<CreditPart>): PartCredits | undefined;
/** Per-message credit total, or undefined when no part carries credits. */
declare function creditsForMessage(parts: ReadonlyArray<CreditPart>): number | undefined;
/** Sum per-message totals across a session's assistant messages (one value each); unit from the most recent carrier. */
declare function sumSessionCredits(messages: ReadonlyArray<CreditMessage>, partsByMessage: (messageID: string) => ReadonlyArray<CreditPart>): SessionCredits;
/** Render credits with the unit, e.g. "12.5 credits", "1 credit". Unit is naively pluralized unless it ends in "s"; with no unit, only the number renders. */
declare function formatCredits(value: number, unit?: string): string;
/**
 * Muted cost lines as an array (one per rendered row). Three states:
 *   - both (credits present + non-zero cost): ["$X.XX spent", "N credits"]
 *   - credits only (cost 0): ["N credits"]
 *   - dollars only (no credits): ["$X.XX spent"] (also ["$0.00 spent"] when empty)
 * Keys off `credits.present` and `cost > 0`, never `credits.total` alone (a 0-credit kiro turn is present).
 */
declare function spendLines(input: {
    cost: number;
    credits: SessionCredits;
}): string[];

declare const _default: {
    id: string;
    tui: TuiPlugin;
};

export { type CreditMessage, type CreditPart, type PartCredits, type SessionCredits, creditsForMessage, _default as default, formatCredits, messageCredits, readPartCredits, spendLines, sumSessionCredits };