11-parking-fee.js

1/**
2 * 🅿️ City Central Parking
3 *
4 * City Central Parking garage is the busiest in downtown. They need an
5 * automated system to calculate parking fees. Different vehicle types
6 * have different rates, and there's a daily maximum so customers
7 * aren't overcharged.
8 *
9 * Rates (first hour / each additional hour):
10 *   - "car":        $5 first hour, then $3/hour
11 *   - "motorcycle": $3 first hour, then $2/hour
12 *   - "bus":        $10 first hour, then $7/hour
13 *
14 * Daily Maximum (fee can never exceed this):
15 *   - "car":        $30
16 *   - "motorcycle": $18
17 *   - "bus":        $60
18 *
19 * Rules:
20 *   - Partial hours are rounded UP (e.g., 1.5 hours → 2 hours)
21 *   - The fee should never exceed the daily maximum
22 *   - If hours is 0 or negative, return -1
23 *   - If vehicleType is not "car", "motorcycle", or "bus", return -1
24 *
25 * Examples:
26 *   - car, 1 hour     → $5
27 *   - car, 3 hours    → $5 + $3 + $3 = $11
28 *   - car, 0.5 hours  → rounds up to 1 hour → $5
29 *   - car, 24 hours   → $5 + 23×$3 = $74 → capped at $30
30 *
31 * @param {number} hours - Number of hours parked
32 * @param {string} vehicleType - "car", "motorcycle", or "bus"
33 * @returns {number} Parking fee or -1 for invalid input
34 */
35export function calculateParkingFee(hours, vehicleType) {
36  if(!(vehicleType == "car" || vehicleType == "motorcycle" || vehicleType == "bus")){
37    return -1
38  }
39
40  if(hours <= 0){
41    return -1
42  }
43
44  let fee;
45  hours = Math.ceil(hours)
46  
47  if(vehicleType == "car" ){
48    hours < 1? fee = 5: fee = (3 * (hours-1)) + 5
49
50    if(fee > 30){
51      return 30
52    }
53    return fee
54  }
55
56  if(vehicleType == "motorcycle" ){
57    hours < 1? fee = 3: fee = (2 * (hours-1)) + 3
58
59    if(fee > 18){
60      return 18
61    }
62
63    return fee
64  }
65
66  if(vehicleType == "bus" ){
67    hours < 1? fee = 10: fee = (7 * (hours-1)) + 10
68
69    if(fee > 60){
70      return 60
71    }
72    return fee
73  }
74  
75}
76