/* main.c
 *
 * Created by Rory Healy (healyr@student.unimelb.edu.au)
 * Created on 25th August 2021
 * Last modified 8th September 2021
 *
 * Lists the watchtowers that are in each face of the polygon.
 * The polygon can be split using a pair of integers, which represent
 * the edge numbers that should be connected. This comes from stdin.
 *
 * To run the program type: 
 * ./voronoi1 dataset_file polygon_file output_file < splits
 * 
 * Options:
 *   dataset_file    required    Path to the dataset file (CSV)
 *   polygon_file    required    Path to the polygon file (txt)
 *   output_file     required    Output solution file
 *   splits          optional    Pairs of integers to split the edges
 *
 */

#ifndef DCEL_HEADER
#include "dcel.h"
#endif

#ifndef COMMON_HEADER
#include "common.h"
#endif

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

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

// int main(int argc, char **argv) {
//     /* Input and output files */
//     FILE *datasetFile = NULL, *polygonFile = NULL, *outputFile = NULL;
//     checkInputArgs(argc, argv, &datasetFile, &polygonFile, &outputFile);

//     /* Stores information about the towers given in dataset file */
//     tower_t **towers = malloc(sizeof(*towers));
//     checkNullPointer(towers);
//     int numTowers = 0;
//     towers = readTowers(towers, datasetFile, &numTowers);

//     /* Stores information about the vertices in the polygon file */
//     vertex_t **vertices = malloc(sizeof(*vertices));
//     checkNullPointer(vertices);
//     int numVertices = 0;
//     vertices = readPolygon(vertices, polygonFile, &numVertices);

//     /* Create DCEL structure from vertices */

//     /* Check for splits, split the polygon if needed */
    
//     /* Counts towers in each polygon, outputs to outputFile */

//     /* Cleaning up data */
//     freeTowers(towers, numTowers);
//     freeVertices(vertices, numVertices);
//     fclose(datasetFile);
//     fclose(polygonFile);
//     fclose(outputFile);
//     return 0;
// }

int main(int argc, char **argv) {
    /* Ensure input arguments are correct */
    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: {
            FILE *pointsFile = NULL, *outputFile = NULL;
            pointsFile = safeFileOpen(&pointsFile, argv[2], "r");
            outputFile = safeFileOpen(&outputFile, argv[3], "w");

            fclose(pointsFile);
            fclose(outputFile);
            break;
        }

        /* Expected usage: ./voronoi2 2 pointsFile polygonFile outputFile */
        case STAGE_2: {
            FILE *pointsFile = NULL, *polygonFile = NULL, *outputFile = NULL;
            pointsFile = safeFileOpen(&pointsFile, argv[2], "r");
            polygonFile = safeFileOpen(&polygonFile, argv[3], "r");
            outputFile = safeFileOpen(&outputFile, argv[4], "w");

            fclose(pointsFile);
            fclose(polygonFile);
            fclose(outputFile);
            break;
        }

        /* Expected usage: ./voronoi2 3 dataFile polygonFile outputFile */
        case STAGE_3: {
            FILE *dataFile = NULL, *polygonFile = NULL, *outputFile = NULL;
            dataFile = safeFileOpen(&dataFile, argv[2], "r");
            polygonFile = safeFileOpen(&polygonFile, argv[3], "r");
            outputFile = safeFileOpen(&outputFile, argv[4], "w");

            fclose(dataFile);
            fclose(polygonFile);
            fclose(outputFile);
            break;
        }

        /* Expected usage: /voronoi2 4 dataFile polygonFile outputFile */
        case STAGE_4: {
            FILE *dataFile = NULL, *polygonFile = NULL, *outputFile = NULL;
            dataFile = safeFileOpen(&dataFile, argv[2], "r");
            polygonFile = safeFileOpen(&polygonFile, argv[3], "r");
            outputFile = safeFileOpen(&outputFile, argv[4], "w");

            fclose(dataFile);
            fclose(polygonFile);
            fclose(outputFile);
            break;
        }

        /* Return error if stage number isn't defined. */  
        case STAGE_ERROR:
        default:
            fprintf(stderr, "Stage was not handled ENUM value (%d)\n", stage);
            exit(EXIT_FAILURE);
    }

    return 0;
}