/* main.c
 *
 * Created by Rory Healy (healyr@student.unimelb.edu.au)
 * Created on 25th August 2021
 * Last modified 14th September 2021
 *
 * Stage 1: Computes and outputs equations for the bisectors of points
 * Stage 2: Computes and outputs intersection points for bisectors against a 
 *          given polygon
 * Stage 3: Computes a Voronoi diagram using watchtowers as points and a
 *          polygon as the outer boundary. Outputs diameters of each Voronoi
 *          cell along with information about each watchtower.
 * Stage 4: Same as Stage 4, but the watchtowers are sorted by ascending order
 *          by diameter.
 *
 * To see valid input arguments, run ./voronoi2
 * 
 */

#ifndef VORONOI_HEADER
#include "voronoi.h"
#endif

#ifndef INPUT_HEADER
#include "input.h"
#endif

int main(int argc, char **argv) {
    /* Ensure input arguments are correct */
    if (argc == 1) {
        printArgError(STAGE_ERROR, "Incorrect usage.");
    }

    /* Get stage, ensure correct input args */
    enum stages stage = getStage(argv[1]);
    int expectedArgs = getExpectedArgs(stage);
    if (expectedArgs != argc) {
        printArgError(stage, "Incorrect number of inputs.");
    }

    /* Then run the program according to the stage given */
    switch(stage) {
        /* Expected usage: ./voronoi2 1 pointsFile outputFile */
        case STAGE_1:
            stage1(argv[2], argv[3]);
            break;

        /* Expected usage: ./voronoi2 2 pointsFile polygonFile outputFile */
        case STAGE_2:
            stage2(argv[2], argv[3], argv[4]);
            break;

        /* Expected usage: ./voronoi2 3 dataFile polygonFile outputFile */
        case STAGE_3:
            stage3(argv[2], argv[3], argv[4]);
            break;

        /* Expected usage: /voronoi2 4 dataFile polygonFile outputFile */
        case STAGE_4:
            stage4(argv[2], argv[3], argv[4]);
            break;

        /* Return error if stage number isn't defined. */  
        case STAGE_ERROR:
        default:
            printArgError(stage, "Invalid stage entered.");
            exit(EXIT_FAILURE);
    }

    return 0;
}