export type SearchUsageReport = {
    installed: boolean;
    enabled_now: boolean;
    applicable: boolean;
    from: string;
    to: string;
    timezone: string;
    read_at: string;
    definition_version: string;
    available_definitions: string[];
    definition_conflict_now: boolean;
    responses: number | null;
    zero_responses: number | null;
    zero_rate: number | null;
    channels: {
        id: string;
        label: string;
        responses: number | null;
        zero_responses: number | null;
        zero_rate: number | null;
        first_recorded_at: string | null;
        last_recorded_at: string | null;
        definition_versions: string[];
    }[];
    exclusions: string[];
    limits: string[];
    completeness: string;
    temporal_basis: string;
};
export type UsageReport = {
    definition_version: string;
    generated_at: string;
    timezone: string;
    observed_before: string;
    filters: {
        from: string;
        to: string;
        service_code: string | null;
        search_definition?: string;
    };
    search?: SearchUsageReport;
    services: { code: string; title: string; version: number }[];
    coverage: Record<string, number | null>;
    metrics: {
        id: string;
        title: string;
        value: number | null;
        unit: string;
        numerator: number | null;
        denominator: number | null;
        state: string;
        source: string;
        limits: string;
    }[];
    unmeasured: { id: string; title: string; reason: string; href?: string }[];
    limits: string[];
    fingerprint: string;
    read_consistency: string;
};

export function usageValue(value: number | null, unit = ''): string {
    if (value === null) return 'Sem medição';
    return `${value.toLocaleString('pt-PT', { maximumFractionDigits: 2 })}${unit ? ` ${unit}` : ''}`;
}

/** Export the applied server snapshot, never the pending filter form. */
export function usageExport(report: UsageReport): string {
    return JSON.stringify(report, null, 2);
}