export interface FallClearanceInput {
    lanyardLength: number;
    decelerationDistance: number;
    harnessStretch: number;
    workerHeight: number;
    safetyFactor: number;
    anchorHeight: number;
    rescueClearance?: number;
    obstacleHeight?: number;
}
export interface FallClearanceResult {
    totalFallDistance: number;
    minimumHeight: number;
    rescueClearance: number;
    freeSpaceRequired: number;
    clearanceAboveObstacle: number;
    isAdequate: boolean | null;
    warnings: string[];
}
export type CouplingQuality = 'good' | 'fair' | 'poor';
export type WorkDuration = 'short' | 'medium' | 'long';
export interface NioshInput {
    horizontalDistance: number;
    verticalDistance: number;
    verticalTravel: number;
    asymmetryAngle: number;
    frequency: number;
    duration: WorkDuration;
    coupling: CouplingQuality;
    loadWeight: number;
}
export interface NioshResult {
    rwl: number;
    liftingIndex: number;
    hm: number;
    vm: number;
    dm: number;
    am: number;
    fm: number;
    cm: number;
    riskLevel: 'low' | 'moderate' | 'high';
}
export interface NoiseExposure {
    soundLevel: number;
    duration: number;
}
export interface NoiseExposureInput {
    exposures: NoiseExposure[];
}
export interface NoiseExposureResult {
    dose: number;
    twa: number;
    status: 'compliant' | 'actionRequired' | 'exceeds';
}
export type WorkloadIntensity = 'light' | 'moderate' | 'heavy' | 'veryHeavy';
export interface WbgtInput {
    dryBulbTemp: number;
    wetBulbTemp: number;
    globeTemp: number;
    isOutdoor: boolean;
    workload: WorkloadIntensity;
    isAcclimatized: boolean;
}
export interface WbgtResult {
    wbgt: number;
    threshold: number;
    status: 'safe' | 'caution' | 'danger';
}
export interface ToolExposure {
    vibrationMagnitude: number;
    exposureTime: number;
}
export interface HavsInput {
    tools: ToolExposure[];
}
export interface HavsResult {
    a8: number;
    partialExposures: number[];
    percentEAV: number;
    percentELV: number;
    exposurePoints: number;
    status: 'safe' | 'action' | 'limit';
    maxDailyExposure: number;
}
export type VentilationActivityLevel = 'sedentary' | 'light' | 'moderate' | 'heavy';
export type SpaceType = 'office' | 'classroom' | 'retail' | 'restaurant' | 'industrial' | 'warehouse' | 'gym' | 'custom';
export interface VentilationRateInput {
    roomLength: number;
    roomWidth: number;
    roomHeight: number;
    occupants: number;
    activityLevel: VentilationActivityLevel;
    spaceType: SpaceType;
    customAch?: number;
}
export interface VentilationRateResult {
    roomVolume: number;
    requiredAch: number;
    cfm: number;
    m3PerHour: number;
    litersPerSecond: number;
    cfmPerPerson: number;
}
export type RespiratorType = 'filtering-facepiece' | 'half-mask' | 'full-facepiece' | 'powered-half-mask' | 'powered-hood' | 'powered-full-facepiece' | 'supplied-air-half' | 'supplied-air-full' | 'supplied-air-full-pd' | 'scba-pd';
export interface RespiratorInput {
    concentration: number;
    oel: number;
    respiratorType: RespiratorType;
}
export interface RespiratorResult {
    muc: number;
    apf: number;
    hazardRatio: number;
    requiredAPF: number;
    protectionAdequate: boolean;
    safetyMargin: number;
}
/**
 * Ladder Angle Calculator Types (OSHA 4:1 rule)
 */
export interface LadderAngleInput {
    ladderLength: number;
    height?: number;
    baseDistance?: number;
}
export interface LadderAngleResult {
    angle: number;
    height: number;
    baseDistance: number;
    ladderLength: number;
    idealBaseDistance: number;
    reachHeight: number;
    isCompliant: boolean;
    warnings: string[];
}
/**
 * Illuminance Calculator Types (Lumen Method)
 */
export interface IlluminanceInput {
    roomLength: number;
    roomWidth: number;
    luminaireHeight: number;
    workplaneHeight?: number;
    targetLux: number;
    lumensPerLuminaire: number;
    wattsPerLuminaire?: number;
    cu?: number;
    mf?: number;
}
export interface IlluminanceResult {
    fixturesNeeded: number;
    actualLux: number;
    roomIndex: number;
    cu: number;
    roomIndexClamped: boolean;
    totalLumens: number;
    powerDensity: number | null;
    recommendedSpacing: number;
}
/**
 * Thermal Comfort (PMV/PPD) Types — ISO 7730
 */
export interface ThermalComfortInput {
    airTemp: number;
    radiantTemp: number;
    airVelocity: number;
    relativeHumidity: number;
    metabolicRate: number;
    clothingInsulation: number;
}
export interface ThermalComfortResult {
    pmv: number;
    ppd: number;
    category: 'A' | 'B' | 'C' | 'outside';
    sensation: 'cold' | 'cool' | 'slightly_cool' | 'neutral' | 'slightly_warm' | 'warm' | 'hot';
}
/**
 * REBA (Rapid Entire Body Assessment) Types
 */
export interface RebaInput {
    trunkAngle: number;
    trunkTwisted: boolean;
    trunkSideBent: boolean;
    neckAngle: number;
    neckTwisted: boolean;
    neckSideBent: boolean;
    legSupport: 'bilateral' | 'unilateral';
    kneeFlexion: number;
    upperArmAngle: number;
    shoulderRaised: boolean;
    armAbducted: boolean;
    armSupported: boolean;
    lowerArmAngle: number;
    wristAngle: number;
    wristTwisted: boolean;
    /** Hand-to-object coupling quality (REBA Step 11). Defaults to 'good' (+0). */
    coupling?: 'good' | 'fair' | 'poor' | 'unacceptable';
    load: number;
    shockForce: boolean;
    staticPosture: boolean;
    repeatedSmallRange: boolean;
    rapidLargeChange: boolean;
}
export interface RebaResult {
    trunkScore: number;
    neckScore: number;
    legScore: number;
    upperArmScore: number;
    lowerArmScore: number;
    wristScore: number;
    couplingScore: number;
    scoreA: number;
    scoreB: number;
    scoreC: number;
    rebaScore: number;
    riskLevel: 'negligible' | 'low' | 'medium' | 'high' | 'very_high';
    actionLevel: number;
}
/**
 * Arc Flash Types — IEEE 1584 / NFPA 70E
 */
export interface ArcFlashInput {
    voltage: number;
    boltedFaultCurrent: number;
    workingDistance: number;
    faultClearingTime: number;
    gapBetweenConductors: number;
    enclosureType: 'open' | 'box' | 'mcc' | 'panel' | 'cable';
}
export interface ArcFlashResult {
    arcCurrent: number;
    incidentEnergy: number;
    arcFlashBoundary: number;
    ppeCategory: 0 | 1 | 2 | 3 | 4;
    hazardLevel: 'safe' | 'danger' | 'extreme';
    requiredPPE: string;
}
/**
 * Confined Space Atmospheric Assessment Types — OSHA 29 CFR 1910.146
 */
export interface ConfinedSpaceInput {
    oxygenPercent: number;
    lelPercent: number;
    h2sPpm?: number;
    coPpm?: number;
    customGas?: {
        name: string;
        concentration: number;
        pel: number;
        idlh: number;
    };
}
export interface ConfinedSpaceResult {
    oxygenStatus: 'safe' | 'deficient' | 'enriched';
    lelStatus: 'safe' | 'caution' | 'danger';
    h2sStatus: 'safe' | 'caution' | 'danger' | 'idlh' | null;
    coStatus: 'safe' | 'caution' | 'danger' | 'idlh' | null;
    customGasStatus: 'safe' | 'exceeds_pel' | 'idlh' | null;
    overallStatus: 'safe' | 'caution' | 'danger' | 'idlh';
    entryPermitted: boolean;
    warnings: string[];
}
/**
 * LEL (Lower Explosive Limit) Mixed Gas Types — Le Chatelier's Rule
 */
export interface GasComponent {
    name: string;
    concentration: number;
    lel: number;
}
export interface LelInput {
    gases: GasComponent[];
    temperature?: number;
    pressure?: number;
}
export interface LelResult {
    mixtureLel: number;
    totalConcentration: number;
    percentOfLel: number;
    status: 'safe' | 'caution' | 'danger';
    safetyMargin: number;
    contributions: {
        name: string;
        fraction: number;
    }[];
}
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