package com.evsuite.abrp;

/**
 * Fourteen-segment letters, as on the time circuits the Time circuits style is drawn after: the
 * months and the gear words. Pure Java so it can be tested off the car.
 *
 * Segments as bits: the outer seven like {@link SevenSegment} (a top, b upper right, c lower
 * right, d bottom, e lower left, f upper left), the middle bar in two halves (g1 left, g2
 * right), and the inner six: h from the upper left corner to the centre, i up the middle, j to
 * the upper right corner, k to the lower left, l down the middle, m to the lower right.
 */
final class Segments14 {

    static final int A = 1, B = 2, C = 4, D = 8, E = 16, F = 32, G1 = 64, G2 = 128,
            H = 256, I = 512, J = 1024, K = 2048, L = 4096, M = 8192;

    private Segments14() {}

    /** The segments a letter, digit or '-' lights; anything else (a space) lights none. */
    static int mask(char ch) {
        switch (Character.toUpperCase(ch)) {
            case 'A': return A | B | C | E | F | G1 | G2;
            case 'B': return A | B | C | D | I | L | G2;
            case 'C': return A | D | E | F;
            case 'D': return A | B | C | D | I | L;
            case 'E': return A | D | E | F | G1 | G2;
            case 'F': return A | E | F | G1;
            case 'G': return A | C | D | E | F | G2;
            case 'H': return B | C | E | F | G1 | G2;
            case 'I': return A | D | I | L;
            case 'J': return B | C | D | E;
            case 'K': return E | F | G1 | J | M;
            case 'L': return D | E | F;
            case 'M': return B | C | E | F | H | J;
            case 'N': return B | C | E | F | H | M;
            case 'O': return A | B | C | D | E | F;
            case 'P': return A | B | E | F | G1 | G2;
            case 'R': return A | B | E | F | G1 | G2 | M;
            case 'S': return A | C | D | F | G1 | G2;
            case 'T': return A | I | L;
            case 'U': return B | C | D | E | F;
            case 'V': return E | F | J | K;
            case 'W': return B | C | E | F | K | M;
            case 'Y': return H | J | L;
            case '0': return A | B | C | D | E | F | J | K;
            case '1': return B | C;
            case '2': return A | B | D | E | G1 | G2;
            case '3': return A | B | C | D | G2;
            case '4': return B | C | F | G1 | G2;
            case '5': return A | C | D | F | G1 | G2;
            case '6': return A | C | D | E | F | G1 | G2;
            case '7': return A | B | C;
            case '8': return A | B | C | D | E | F | G1 | G2;
            case '9': return A | B | C | D | F | G1 | G2;
            case '-': return G1 | G2;
            default: return 0;
        }
    }

    /** The three-letter month as the time circuits show it: JAN … DEC; "---" out of range. */
    static String month(int month0) {
        String[] m = { "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC" };
        return month0 >= 0 && month0 < 12 ? m[month0] : "---";
    }

    /** The gear as a three-letter word for the time circuits: PRK, REV, NTL, DRV; "---" unread. */
    static String gearWord(Integer gear) {
        if (gear == null) return "---";
        switch (gear) {
            case 1: return "PRK";
            case 2: return "REV";
            case 3: return "NTL";
            case 4: return "DRV";
            default: return "---";
        }
    }
}