#include "parse.h"

#include <QObject>

QVector<Token> lex(const QString& code) {
    QVector<Token> tokens;
    size_t i = 0;
    size_t lineCounter = 0;
    size_t columnCounter = 0;
    while(i < code.size()) {
        if(code[i] == '\n') {
            tokens.push_back({lineCounter, columnCounter, TokenTypeEOL, i, i + 1});
            ++lineCounter;
            columnCounter = 0;
            ++i;
        }
        else if(code[i] == ',') {
            tokens.push_back({lineCounter, columnCounter, TokenTypeComma, i, i + 1});
            ++i;
        }
        else if(code[i] == '#') {
            tokens.push_back({lineCounter, columnCounter, TokenTypeHash, i, i + 1});
            ++i;
        }
        else if(code[i] == '%') {
            tokens.push_back({lineCounter, columnCounter, TokenTypePercent, i, i + 1});
            ++i;
        }
        else if(code[i] == '$') {
            tokens.push_back({lineCounter, columnCounter, TokenTypeDollar, i, i + 1});
            ++i;
        }
        else if(code[i] == '/' && (i+1) < code.size() && code[i+1] == '/') {
            size_t s = i + 2;
            while(s < code.size() && code[s] != '\n') {
                 ++s;
            }
            i = s;
        }
        else if(code[i].isSpace()) {
            ++i;
        }
        else if(code[i].isDigit()) {
            size_t s = i + 1;
            while(s < code.size() && code[s].isDigit()){
                 ++s;
            }

            tokens.push_back({lineCounter, columnCounter, TokenTypeNumber, i, s});
            i = s;
        }
        else if(code[i].isLetter()) {
            size_t s = i + 1;
            while(s < code.size() && code[s].isLetter()){
                 ++s;
            }

            tokens.push_back({lineCounter, columnCounter, TokenTypeWord, i, s});
            i = s;
        }
        else {
            tokens.push_back({lineCounter, columnCounter, TokenTypeError, i, i + 1});
            ++i;
        }

        ++columnCounter;
    }

    return tokens;
}



QVector<QVector<Instruction>> parse(const QString& code, const QVector<Token>& tokens, QVector<ParseError>& errors) {
    size_t i = 0;

    while(i < tokens.size()) {
        if(tokens[i].tokenType != TokenTypeWord) {
            errors += ParseError(tokens[i].line, tokens[i].column, QObject::tr("is not a valid Instruction"));
            //lets fast forward to next line
            while(i < tokens.size() && tokens[i].tokenType != TokenTypeEOL) {
                ++i;
            }
            ++i;
            continue;
        }
        else {
            QString word = code.mid(tokens[i].begin, tokens[i].end - tokens[i].begin).toUpper();

            if(word.compare("CREATE", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "MOVE", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "DIE", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "TRANS", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "RTRANS", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "TURN", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "JUMP", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "AJUMP", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "BJUMP", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "TURN", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "SCAN", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "FARSCAN", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "SET", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "ADD", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "SUB", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "MUL", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "DIV", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "MOD", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "MIN", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "MAX", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "RANDOM", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "IF", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "IFN", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "IFG", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "IFL", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "IFGE", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "IFLE", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "INIT", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "BREAK", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "RESUME", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "SLEEP", Qt::CaseInsensitive)) {
            }
            else if(word.compare( "QUIT", Qt::CaseInsensitive)) {
            }
            else {
                errors += ParseError(tokens[i].line, tokens[i].column, QObject::tr("is not a valid Instruction"));
            }
            ++i;
        }
    }
}