#include <stdio.h>
#include "quickjs.h"

static JSValue c_add(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst *argv) {
    double a, b;
    JS_ToFloat64(ctx, &a, argv[0]);
    JS_ToFloat64(ctx, &b, argv[1]);
    return JS_NewFloat64(ctx, a + b);
}

int main(int argc, char **argv) {
    JSRuntime *rt = JS_NewRuntime();
    JSContext *ctx = JS_NewContext(rt);
    
    printf("QuickJS Demo\n");
    printf("============\n\n");
    
    // Example 1: Simple evaluation
    printf("Example 1: Simple evaluation\n");
    JSValue result = JS_Eval(ctx, "1 + 2", 5, "<eval>", JS_EVAL_TYPE_GLOBAL);
    double value;
    JS_ToFloat64(ctx, &value, result);
    printf("1 + 2 = %.0f\n", value);
    JS_FreeValue(ctx, result);
    
    // Example 2: String operations
    printf("\nExample 2: String operations\n");
    result = JS_Eval(ctx, "'Hello' + ' ' + 'World'", 22, "<eval>", JS_EVAL_TYPE_GLOBAL);
    const char *str = JS_ToCString(ctx, result);
    printf("String result: %s\n", str);
    JS_FreeCString(ctx, str);
    JS_FreeValue(ctx, result);
    
    // Example 3: Function calls
    printf("\nExample 3: Function calls\n");
    result = JS_Eval(ctx, "function add(a,b){return a+b;} add(10,20)", 40, "<eval>", JS_EVAL_TYPE_GLOBAL);
    JS_ToFloat64(ctx, &value, result);
    printf("add(10,20) = %.0f\n", value);
    JS_FreeValue(ctx, result);
    
    // Example 4: C function registration
    printf("\nExample 4: C function from JavaScript\n");
    JSValue global = JS_GetGlobalObject(ctx);
    JSValue func = JS_NewCFunction(ctx, c_add, "c_add", 2);
    JS_SetPropertyStr(ctx, global, "c_add", func);
    JS_FreeValue(ctx, global);
    
    result = JS_Eval(ctx, "c_add(5,15)", 11, "<eval>", JS_EVAL_TYPE_GLOBAL);
    JS_ToFloat64(ctx, &value, result);
    printf("c_add(5,15) = %.0f\n", value);
    JS_FreeValue(ctx, result);
    
    printf("\nDemo completed successfully!\n");
    
    JS_FreeContext(ctx);
    JS_FreeRuntime(rt);
    return 0;
}