package com.margelo.nitro.core

import androidx.annotation.Keep
import com.facebook.jni.HybridData
import com.facebook.proguard.annotations.DoNotStrip
import dalvik.annotation.optimization.FastNative

typealias AnyArray = Array<AnyValue>
typealias AnyObject = Map<String, AnyValue>

/**
 * Represents a value that can be any of the following types:
 * - `null`
 * - [Double]
 * - [Boolean]
 * - [Long]
 * - [String]
 * - [AnyArray] ([Array]`<AnyValue>`)
 * - [AnyObject] ([Map]`<String, AnyValue>`)
 */
@Suppress("KotlinJniMissingFunction")
@Keep
@DoNotStrip
class AnyValue {
  private val mHybridData: HybridData

  /**
   * Create a new [AnyValue] that holds `null`.
   */
  constructor() {
    mHybridData = initHybrid()
  }

  @DoNotStrip
  @Keep
  private constructor(mHybridData: HybridData) {
    this.mHybridData = mHybridData
  }

  /**
   * Create a new [AnyValue] that holds the given [Double]
   */
  constructor(value: Double) {
    mHybridData = initHybrid(value)
  }

  /**
   * Create a new [AnyValue] that holds the given [Boolean]
   */
  constructor(value: Boolean) {
    mHybridData = initHybrid(value)
  }

  /**
   * Create a new [AnyValue] that holds the given [Long]
   */
  constructor(value: Long) {
    mHybridData = initHybrid(value)
  }

  /**
   * Create a new [AnyValue] that holds the given [String]
   */
  constructor(value: String) {
    mHybridData = initHybrid(value)
  }

  /**
   * Create a new [AnyValue] that holds the given [AnyArray]
   */
  constructor(value: AnyArray) {
    mHybridData = initHybrid(value)
  }

  /**
   * Create a new [AnyValue] that holds the given [AnyObject]
   */
  constructor(value: AnyObject) {
    mHybridData = initHybrid(value)
  }

  /**
   * Gets whether this [AnyValue] instance is holding a `null`.
   */
  @FastNative
  external fun isNull(): Boolean

  /**
   * Gets whether this [AnyValue] instance is holding a [Double] value.
   */
  @FastNative
  external fun isDouble(): Boolean

  /**
   * Gets whether this [AnyValue] instance is holding a [Boolean] value.
   */
  @FastNative
  external fun isBoolean(): Boolean

  /**
   * Gets whether this [AnyValue] instance is holding a [Long] value.
   */
  @FastNative
  external fun isInt64(): Boolean

  /**
   * Gets whether this [AnyValue] instance is holding a [String] value.
   */
  @FastNative
  external fun isString(): Boolean

  /**
   * Gets whether this [AnyValue] instance is holding an [AnyArray] value.
   */
  @FastNative
  external fun isAnyArray(): Boolean

  /**
   * Gets whether this [AnyValue] instance is holding an [AnyObject] value.
   */
  @FastNative
  external fun isAnyObject(): Boolean

  /**
   * Get the [Double] value this [AnyValue] is holding.
   * @throws Error if this [AnyValue] is not holding a [Double] (see [isDouble]`()`)
   */
  @FastNative
  external fun asDouble(): Double

  /**
   * Get the [Boolean] value this [AnyValue] is holding.
   * @throws Error if this [AnyValue] is not holding a [Boolean] (see [isBoolean]`()`)
   */
  @FastNative
  external fun asBoolean(): Boolean

  /**
   * Get the [Long] value this [AnyValue] is holding.
   * @throws Error if this [AnyValue] is not holding a [Long] (see [isInt64]`()`)
   */
  @FastNative
  external fun asInt64(): Long

  /**
   * Get the [String] value this [AnyValue] is holding.
   * @throws Error if this [AnyValue] is not holding a [String] (see [isString]`()`)
   */
  external fun asString(): String

  /**
   * Get the [AnyArray] value this [AnyValue] is holding.
   * @throws Error if this [AnyValue] is not holding an [AnyArray] (see [isAnyArray]`()`)
   */
  external fun asAnyArray(): AnyArray

  /**
   * Get the [AnyObject] value this [AnyValue] is holding.
   * @throws Error if this [AnyValue] is not holding an [AnyObject] (see [isAnyObject]`()`)
   */
  external fun asAnyObject(): AnyObject

  private external fun initHybrid(): HybridData

  private external fun initHybrid(value: Double): HybridData

  private external fun initHybrid(value: Boolean): HybridData

  private external fun initHybrid(value: Long): HybridData

  private external fun initHybrid(value: String): HybridData

  private external fun initHybrid(value: AnyArray): HybridData

  private external fun initHybrid(value: AnyObject): HybridData

  fun toAny(): Any? {
    if (isNull()) {
      return null
    } else if (isDouble()) {
      return asDouble()
    } else if (isInt64()) {
      return asInt64()
    } else if (isBoolean()) {
      return asBoolean()
    } else if (isString()) {
      return asString()
    } else if (isAnyArray()) {
      val mapped = asAnyArray().map { it.toAny() }
      return mapped.toTypedArray()
    } else if (isAnyObject()) {
      val mapped = asAnyObject().mapValues { (key, value) -> value.toAny() }
      return mapped
    } else {
      throw Error("AnyValue holds unknown type!")
    }
  }

  companion object {
    fun fromAny(value: Any?): AnyValue {
      when (value) {
        null -> {
          return AnyValue()
        }

        is Double -> {
          return AnyValue(value)
        }

        is Float -> {
          return AnyValue(value.toDouble())
        }

        is Int -> {
          return AnyValue(value.toDouble())
        }

        is Boolean -> {
          return AnyValue(value)
        }

        is Long -> {
          return AnyValue(value)
        }

        is String -> {
          return AnyValue(value)
        }

        is Array<*> -> {
          val mapped = value.map { v -> AnyValue.fromAny(v) }
          return AnyValue(mapped.toTypedArray())
        }

        is List<*> -> {
          val mapped = value.map { v -> AnyValue.fromAny(v) }
          return AnyValue(mapped.toTypedArray())
        }

        is Map<*, *> -> {
          val mapped = value.map { (k, v) -> k.toString() to AnyValue.fromAny(v) }
          return AnyValue(mapped.toMap())
        }

        is AnyValue, is AnyMap -> {
          throw Error("Cannot box AnyValue ($value) twice!")
        }

        else -> {
          throw Error("Value \"$value\" cannot be represented as AnyValue!")
        }
      }
    }
  }
}