// hello.c -- Minimal DVX application
//
// Demonstrates:
//   - App descriptor and entry point
//   - Window creation with widgets
//   - Resource loading (reading embedded strings from .res)
//   - Message box display
//
// Build: see makefile
// Deploy: copy hello.app to APPS/<vendor>/HELLO/ on the target.

#include "dvxApp.h"
#include "dvxWgt.h"
#include "dvxWm.h"
#include "dvxRes.h"
#include "shellApp.h"
#include "button/button.h"
#include "label/label.h"
#include "box/box.h"

#include <stdio.h>

// App descriptor — exported to the shell
AppDescriptorT appDescriptor = {
    .name          = "Hello",
    .hasMainLoop   = false,
    .multiInstance = false,
    .stackSize     = 0,
    .priority      = 0
};

static AppContextT    *sAc  = NULL;
static DxeAppContextT *sCtx = NULL;
static WindowT        *sWin = NULL;

static void onClose(WindowT *win) {
    dvxDestroyWindow(sAc, win);
    sWin = NULL;
}


static void onButtonClick(WidgetT *w) {
    (void)w;

    // Read the custom "greeting" resource from our .app file
    uint32_t size = 0;
    void *data = dvxResRead(dvxResOpen(sCtx->appPath), "greeting", &size);

    if (data) {
        dvxMessageBox(sAc, "Hello", (const char *)data, MB_OK | MB_ICONINFO);
        free(data);
    } else {
        dvxMessageBox(sAc, "Hello", "Hello from DVX!", MB_OK | MB_ICONINFO);
    }
}


int32_t appMain(DxeAppContextT *ctx) {
    sCtx = ctx;
    sAc  = ctx->shellCtx;

    sWin = dvxCreateWindow(sAc, "Hello World", 100, 80, 240, 120, true);

    if (!sWin) {
        return -1;
    }

    sWin->onClose = onClose;

    WidgetT *root = wgtInitWindow(sAc, sWin);

    if (root) {
        wgtLabel(root, "Welcome to DVX!");

        WidgetT *btn = wgtButton(root, "Click Me");

        if (btn) {
            btn->onClick = onButtonClick;
        }
    }

    return 0;
}