package com.blaze.rtnblazesdk.utils.parsing

import android.util.Log
import com.facebook.react.bridge.ReadableMap
import com.google.gson.Gson
import com.google.gson.GsonBuilder

private const val TAG = "GsonUtils"

/**
 * Extension function to convert a ReadableMap to a object of type T
 * using a custom Gson instance with registered custom adapters.
 *
 * @return An instance of type T deserialized from the ReadableMap, or null if deserialization fails.
 */
internal inline fun <reified T> ReadableMap.toObject(): T? {
    return try {
        // Convert ReadableMap to JSON string
        val jsonString = this.toJsonString()
        // Deserialize JSON string to data class of type T
        jsonString.fromJsonString<T>()
    } catch (e: Exception) {
        Log.e(TAG, "toDataClass: $e")
        null
    }
}

/**
 * Creates a GsonBuilder with registered custom type adapters.
 *
 * @return A GsonBuilder instance with custom type adapters registered.
 */
private fun createCustomGsonBuilder(): GsonBuilder =
    GsonBuilder()
        .registerRoundingIntAdapterFactory()
        .registerBlazeEnumMapperAdapterFactory()

/**
 * Creates a customized Gson instance.
 *
 * @return A Gson instance with custom type adapters registered.
 */
private fun createCustomGson(): Gson {
    return createCustomGsonBuilder().setPrettyPrinting().create()
}

/**
 * Extension function to convert a ReadableMap to a JSON string.
 *
 * @return The JSON string representation of the ReadableMap.
 */
internal fun ReadableMap.toJsonString(): String {
    val map = this.toHashMap()
    return createCustomGson().toJson(map)
}

/**
 * Generic extension function to deserialize a JSON string into a data class of type T
 * using a custom Gson instance with registered custom adapters.
 *
 * @return An instance of type T deserialized from the JSON string, or null if deserialization fails.
 */
internal inline fun <reified T> String.fromJsonString(): T? {
    return try {
        createCustomGson()
            .fromJson(this, T::class.java)
    } catch (e: Exception) {
        Log.e(TAG, "fromJsonString: $e")
        null
    }
}

/**
 * Generic extension function to serialize any data class to a JSON string using Gson
 * with registered custom adapters.
 *
 * @return The JSON string representation of the data class, or null if serialization fails.
 */
internal fun Any.toJsonString(): String? {
    return try {
        createCustomGson().toJson(this)
    } catch (e: Exception) {
        null
    }
}

/**
 * Extension function to deserialize any object assumed to be representable as a JSON string into a data class of type T.
 * Requires that the Any object can be transformed into a JSON string representation directly or indirectly.
 *
 * @return An instance of type T deserialized from the JSON representation of the object, or null if deserialization fails.
 */
internal inline fun <reified T> Any.toObject(): T? {
    return try {
        val jsonString = when (this) {
            is String -> this
            else -> this.toJsonString() // This calls toJsonString if available
        }
        createCustomGson().fromJson(jsonString, T::class.java)
    } catch (e: Exception) {
        Log.e(TAG, "Error deserializing object to type ${T::class.java}: $e")
        null
    }
}