import type {
    AnalyticsEvent,
    ConsentPolicy,
} from "../types/analytics.types.js";

/**
 * Permits every event. Default policy when none is supplied to the
 * tracker.
 */
export class AllowAllPolicy implements ConsentPolicy {
    public isAllowed(_event: AnalyticsEvent): boolean {
        return true;
    }
}

/**
 * Honours the host's `Do Not Track` signal. Blocks every event when
 * `navigator.doNotTrack === "1"`, otherwise permits every event. Reads
 * the navigator lazily inside `isAllowed` so the policy is constructable
 * in SSR / Node contexts where `navigator` does not exist.
 */
export class DoNotTrackPolicy implements ConsentPolicy {
    public isAllowed(_event: AnalyticsEvent): boolean {
        if (typeof navigator === "undefined") {
            return true;
        }
        return navigator.doNotTrack !== "1";
    }
}