#include "lexer.h"
#include "SolsToken.h"
#include "../include/error.h"
#include "../include/estr.h"

ResultType(SolsLexer, charptr) createLexer(char* input) {
    char* inputcopy = malloc(strlen(input) + 1);
    if (inputcopy == NULL) {
        return Error(SolsLexer, charptr, "Couldn't copy string into lexer (in createLexer() function)");
    }
    strcpy(inputcopy, input);
    ResultType(SolsTokens, charptr) tokens = createSolsTokens();
    if (tokens.error) {
        Estr e = CREATE_ESTR(tokens.as.error);
        APPEND_ESTR(e, " (in createLexer() function)");
        return Error(SolsLexer, charptr, e.str);
    }
    SolsLexer lexer = {
        .input = inputcopy,
        .output = tokens.as.success,
        .current = 0,
    };
    return Success(SolsLexer, charptr, lexer);
}

ResultType(voidptr, charptr) lex(SolsLexer* lexer) {
    if (lexer->input == NULL) {
        return Error(voidptr, charptr, "Lexer is not initialised");
    }

    lexer->current = 0;

    return Success(voidptr, charptr, NULL);
}