#include "lexer/lexer.h"
#include <stdio.h>

char* getFileContents(const char* filename) {
    // https://stackoverflow.com/questions/3747086/reading-the-whole-text-file-into-a-char-array-in-c
    FILE* fp;
    long lSize;
    char* file;

    fp = fopen(filename, "rb");
    if (!fp) {
        perror(filename);
        exit(1);
    }

    fseek(fp, 0L, SEEK_END);
    lSize = ftell(fp);
    rewind(fp);

    file = calloc(1, lSize + 1);
    if (!file) {
        fclose(fp);
        fputs("memory allocation fail when reading file", stderr);
        exit(1);
    }

    if (1!=fread(file, lSize, 1, fp)) {
        fclose(fp);
        free(file);
        fputs("couldn't read entire file", stderr);
        exit(1);
    }

    // we done
    fclose(fp);

    return file;
}

int main(int argc, char** argv) {
    if (argc < 2) {
        printf("Usage: %s [file]\n", argv[0]);
        exit(1);
    }
    char* fileContents = getFileContents(argv[1]);
    ResultType(SolsLexer, charptr) lexer = createLexer(fileContents);
    if (lexer.error) {
        printf("Error while creating lexer: %s", lexer.as.error);
        exit(1);
    }
    ResultType(Nothing, charptr) lexed = lex(&lexer.as.success);
    if (lexed.error) {
        printf("%s", lexed.as.error);
        exit(1);
    }

    return 0;
}