id("com.google.devtools.ksp") version "2.0.0-1.0.21" // version of ksp can dependent on your kotlin version

implementation("me.ddayo:aris.luagen")
ksp("me.ddayo:ap")

@LuaProvier("MyGenerated") // specify generated class name here. You can also set default name at ksp option
object MyFunctions {
    @LuaFunction // this creates lua function as same name with kotlin side
    fun function1() {
        // do some stuff for function1
    }
    
    @LuaFunction(name = "custom_function") // this overwrites the name of function
    fun function2() {
        // do some stuff for custom_function
    }
    
    @LuaFunction("create_kotlin_class")
    fun function3() = MyKotlinClass()
}

@LuaProvider("MyGenerated")
class MyKotlinClass: IStaticDecl by MyGenerated.MyKotlinClass_LuaGenerated {
    /*
     MyKotlinClass_LuaGenerated object which contains implementation of toLua() will be generated by KSP. 
     If this class is abstract, just adding @LuaProvider annotation is also ok
     
     Using `by` keyword is equivalent with following code:
     override fun toLua(lua: Lua) {
         MyKotlinClass_LuaGenerated.toLua(lua)
     }
     Modification of toLua method is not recommended.
     */
    
    @LuaFunction
    fun myFUnction(param: Int) {
        // do some stuff for myFUnction
    }
}

class MyEngine: LuaEngine() {
    init {
        MyGenerated.initLua(lua)
    }
}

class Main {
    fun main() {
        val engine = MyEngine()
        engine.createTask("""
        -- your code here
        local a = create_kotlin_class()
        a:myFUnction(1) -- invoke a.myFUnction with parameter 1
        -- a.myFUnction(1) does not works because the function accepts self object as first argument
        
        coroutine.yield() -- this exists from lua context
        
        custom_function() -- this executed on second loop
        """, "some_task")
        engine.loop() // execute function
        engine.loop() // resume lua code execution
    }
}