#ifndef QWADB_H
#define QWADB_H

#include <QByteArray>
#include <QList>
#include <QMainWindow>
#include <QTcpSocket>
#include <QQueue>
#include "ui_qwadb.h"
#include "wasm.h"

QT_BEGIN_NAMESPACE
namespace Ui {
class QWadb;
}
QT_END_NAMESPACE

struct QWadbLinear
{
    WasmType type;
};

Q_DECLARE_METATYPE(QWadbLinear);

class QWadb : public QMainWindow
{
    Q_OBJECT

public:
    QWadb(const QCoreApplication &app, QWidget *parent = nullptr);

private:

    struct request
    {
        enum class type {global, local, param, bkpt, linear} type;
        varuint32 index, rindex;
        QVariant v;
    };

    void open(const QString &path);

    int trap(const QList<QByteArray> &frame);
    int ok(const QList<QByteArray> &frame);
    int parse(const QByteArray &frame);
    int process(const QByteArray &frame);
    QVariant parse_value(const QByteArray &v, WasmType type) const;
    int parse_global(const QList<QByteArray> &params) const;
    int parse_param(const QList<QByteArray> &params) const;
    int parse_local(const QList<QByteArray> &params) const;
    int parse_linear(const QList<QByteArray> &params) const;

    int push(const request &r);
    int pop(request &r);

    typedef int (QWadb::*stepfn)(char);
    int getlf(char b);
    int getsync(char b);

    int write(const QByteArray &ba);

    const char *to_fmt(WasmType type) const;
    const char *to_string(WasmType type) const;
    int from_string(const QString &s, WasmType &type) const;

    request lastreq;
    bool connected;
    QTcpSocket socket;
    QByteArray frame;
    QQueue<request> reqs;
    stepfn step;
    Ui::QWadb ui;
    Wasm w;

signals:
    void sendreq(void);

private slots:
    void disconnected(void);
};

#endif