package at.hannibal2.skyhanni.utils

import java.lang.reflect.Constructor
import java.lang.reflect.Field
import java.lang.reflect.Modifier
import kotlin.properties.ReadWriteProperty
import kotlin.reflect.KMutableProperty1
import kotlin.reflect.KProperty
import kotlin.reflect.KProperty0
import kotlin.reflect.KProperty1
import kotlin.reflect.full.isSubtypeOf
import kotlin.reflect.full.memberProperties
import kotlin.reflect.full.starProjectedType
import kotlin.reflect.jvm.isAccessible

object ReflectionUtils {

    // TODO nea?
//    fun <T> dynamic(block: () -> KMutableProperty0<T>?): ReadWriteProperty<Any?, T?> {
//        return object : ReadWriteProperty<Any?, T?> {
//            override fun getValue(thisRef: Any?, property: KProperty<*>): T? {
//                return block()?.get()
//            }
//
//            override fun setValue(thisRef: Any?, property: KProperty<*>, value: T?) {
//                if (value != null)
//                    block()?.set(value)
//            }
//        }
//    }

    fun <T, R> dynamic(root: KProperty0<R?>, child: KMutableProperty1<R, T>) =
        object : ReadWriteProperty<Any?, T?> {
            override fun getValue(thisRef: Any?, property: KProperty<*>): T? {
                val rootObj = root.get() ?: return null
                return child.get(rootObj)
            }

            override fun setValue(thisRef: Any?, property: KProperty<*>, value: T?) {
                if (value == null) return
                val rootObj = root.get() ?: return
                child.set(rootObj, value)
            }
        }

    inline fun <reified T : Any> Any.getPropertiesWithType() =
        this::class.memberProperties
            .filter { it.returnType.isSubtypeOf(T::class.starProjectedType) }
            .map {
                it.isAccessible = true
                (it as KProperty1<Any, T>).get(this)
            }

    fun Field.makeAccessible() = also { isAccessible = true }

    fun <T> Constructor<T>.makeAccessible() = also { isAccessible = true }

    fun Field.removeFinal(): Field {
        javaClass.getDeclaredField("modifiers").makeAccessible().set(this, modifiers and (Modifier.FINAL.inv()))
        return this
    }

    fun StackTraceElement.getClassInstance(): Class<*> {
        return Class.forName(this.className)
    }

    fun Class<*>.getDeclaredFieldOrNull(name: String): Field? = declaredFields.firstOrNull { it.name == name }
}