export type ChartType = "bar" | "line" | "scatter" | "area";
/**
 * Per-column interpolation mode for line / area glyphs.
 */
export type InterpolateMode = "skip" | "solid" | "transparent";
/**
 * Per-column entry inside the viewer's `columns_config` map.
 */
export interface ColumnChartConfig {
    /**
     * "Bar" | "Line" | "Scatter" | "Area" (case-insensitive). Invalid / missing → bar.
     */
    chart_type?: string;
    /**
     * Explicit stack override.
     */
    stack?: boolean;
    /**
     * Force this aggregate onto the secondary (right) Y axis,
     * independent of `autoAltYAxis` and the dual-axis ratio
     * heuristic.
     */
    alt_axis?: boolean;
    /**
     * Interpolation mode for line / area glyphs. See
     * {@link InterpolateMode}. Legacy values `true` / `false` are also
     * accepted by {@link resolveInterpolate} (mapped to `"solid"` /
     * `"skip"`). Default `"skip"`. No effect on bar / scatter.
     */
    interpolate?: InterpolateMode;
}
/**
 * Resolve the render glyph for an aggregate base name. Lookup key is the
 * *base* (e.g. `"Sales"`); composite arrow columns like `"North|Sales"`
 * should strip the prefix before calling — the bar pipeline already
 * tracks aggregates as base names, so call sites pass the base directly.
 */
export declare function resolveChartType(aggName: string, cfg: Record<string, ColumnChartConfig> | undefined, fallback?: ChartType): ChartType;
/**
 * Resolve whether a series stacks with its aggregate siblings.
 */
export declare function resolveStack(aggName: string, chartType: ChartType, cfg: Record<string, ColumnChartConfig> | undefined): boolean;
/**
 * Resolve whether a column is pinned to the secondary Y axis via
 * `columns_config[aggName].alt_axis`.
 */
export declare function resolveAltAxis(aggName: string, cfg: Record<string, ColumnChartConfig> | undefined): boolean;
/**
 * Resolve the interpolation mode for this aggregate.
 */
export declare function resolveInterpolate(aggName: string, chartType: ChartType, cfg: Record<string, ColumnChartConfig> | undefined): InterpolateMode;