// SPDX-License-Identifier: Apache-2.0

package chisel3.internal.firrtl

import firrtl.{ir => fir}
import chisel3._
import chisel3.internal._
import chisel3.experimental._
import _root_.firrtl.{ir => firrtlir}
import _root_.firrtl.{PrimOps, RenameMap}
import _root_.firrtl.annotations.Annotation

import scala.collection.immutable.NumericRange
import scala.math.BigDecimal.RoundingMode
import scala.annotation.nowarn
import scala.collection.mutable

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class PrimOp(name: String) {
  override def toString: String = name
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
object PrimOp {
  val AddOp = PrimOp("add")
  val SubOp = PrimOp("sub")
  val TailOp = PrimOp("tail")
  val HeadOp = PrimOp("head")
  val TimesOp = PrimOp("mul")
  val DivideOp = PrimOp("div")
  val RemOp = PrimOp("rem")
  val ShiftLeftOp = PrimOp("shl")
  val ShiftRightOp = PrimOp("shr")
  val DynamicShiftLeftOp = PrimOp("dshl")
  val DynamicShiftRightOp = PrimOp("dshr")
  val BitAndOp = PrimOp("and")
  val BitOrOp = PrimOp("or")
  val BitXorOp = PrimOp("xor")
  val BitNotOp = PrimOp("not")
  val ConcatOp = PrimOp("cat")
  val BitsExtractOp = PrimOp("bits")
  val LessOp = PrimOp("lt")
  val LessEqOp = PrimOp("leq")
  val GreaterOp = PrimOp("gt")
  val GreaterEqOp = PrimOp("geq")
  val EqualOp = PrimOp("eq")
  val PadOp = PrimOp("pad")
  val NotEqualOp = PrimOp("neq")
  val NegOp = PrimOp("neg")
  val MultiplexOp = PrimOp("mux")
  val AndReduceOp = PrimOp("andr")
  val OrReduceOp = PrimOp("orr")
  val XorReduceOp = PrimOp("xorr")
  val ConvertOp = PrimOp("cvt")
  val AsUIntOp = PrimOp("asUInt")
  val AsSIntOp = PrimOp("asSInt")
  val AsFixedPointOp = PrimOp("asFixedPoint")
  val AsIntervalOp = PrimOp("asInterval")
  val WrapOp = PrimOp("wrap")
  val SqueezeOp = PrimOp("squz")
  val ClipOp = PrimOp("clip")
  val SetBinaryPoint = PrimOp("setp")
  val IncreasePrecision = PrimOp("incp")
  val DecreasePrecision = PrimOp("decp")
  val AsClockOp = PrimOp("asClock")
  val AsAsyncResetOp = PrimOp("asAsyncReset")
}

sealed abstract class Arg {
  def localName: String = name
  def contextualName(ctx: Component): String = name
  def fullName(ctx:       Component): String = contextualName(ctx)
  def name: String
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Node(id: HasId) extends Arg {
  override def contextualName(ctx: Component): String = id.getOptionRef match {
    case Some(arg) => arg.contextualName(ctx)
    case None      => id.instanceName
  }
  override def localName: String = id.getOptionRef match {
    case Some(arg) => arg.localName
    case None      => id.instanceName
  }
  def name: String = id.getOptionRef match {
    case Some(arg) => arg.name
    case None      => id.instanceName
  }
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
object Arg {
  def earlyLocalName(id: HasId): String = earlyLocalName(id, true)

  def earlyLocalName(id: HasId, includeRoot: Boolean): String = id.getOptionRef match {
    case Some(Index(Node(imm), Node(value))) =>
      s"${earlyLocalName(imm, includeRoot)}[${earlyLocalName(imm, includeRoot)}]"
    case Some(Index(Node(imm), arg)) => s"${earlyLocalName(imm, includeRoot)}[${arg.localName}]"
    case Some(Slot(Node(imm), name)) => s"${earlyLocalName(imm, includeRoot)}.$name"
    case Some(OpaqueSlot(Node(imm))) => s"${earlyLocalName(imm, includeRoot)}"
    case Some(arg) if includeRoot    => arg.name
    case None if includeRoot =>
      id match {
        case data: Data => data._computeName(Some("?")).get
        case _ => "?"
      }
    case _ => "_" // Used when includeRoot == false
  }
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
abstract class LitArg(val num: BigInt, widthArg: Width) extends Arg {
  private[chisel3] def forcedWidth = widthArg.known
  private[chisel3] def width: Width = if (forcedWidth) widthArg else Width(minWidth)
  override def contextualName(ctx: Component): String = name
  // Ensure the node representing this LitArg has a ref to it and a literal binding.
  def bindLitArg[T <: Element](elem: T): T = {
    elem.bind(ElementLitBinding(this))
    elem.setRef(this)
    elem
  }

  /** Provides a mechanism that LitArgs can have their width adjusted
    * to match other members of a VecLiteral
    *
    * @param newWidth the new width for this
    * @return
    */
  def cloneWithWidth(newWidth: Width): this.type

  protected def minWidth: Int
  if (forcedWidth) {
    require(
      widthArg.get >= minWidth,
      s"The literal value ${num} was elaborated with a specified width of ${widthArg.get} bits, but at least ${minWidth} bits are required."
    )
  }
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class ILit(n: BigInt) extends Arg {
  def name: String = n.toString
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class ULit(n: BigInt, w: Width) extends LitArg(n, w) {
  def name:     String = "UInt" + width + "(0h0" + num.toString(16) + ")"
  def minWidth: Int = (if (w.known) 0 else 1).max(n.bitLength)

  def cloneWithWidth(newWidth: Width): this.type = {
    ULit(n, newWidth).asInstanceOf[this.type]
  }

  require(n >= 0, s"UInt literal ${n} is negative")
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class SLit(n: BigInt, w: Width) extends LitArg(n, w) {
  def name: String = {
    val unsigned = if (n < 0) (BigInt(1) << width.get) + n else n
    s"asSInt(${ULit(unsigned, width).name})"
  }
  def minWidth: Int = (if (w.known) 0 else 1) + n.bitLength

  def cloneWithWidth(newWidth: Width): this.type = {
    SLit(n, newWidth).asInstanceOf[this.type]
  }
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Ref(name: String) extends Arg

/** Arg for ports of Modules
  * @param mod the module this port belongs to
  * @param name the name of the port
  */
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class ModuleIO(mod: BaseModule, name: String) extends Arg {
  override def contextualName(ctx: Component): String =
    if (mod eq ctx.id) name else s"${mod.getRef.name}.$name"
}

/** Ports of cloned modules (CloneModuleAsRecord)
  * @param mod The original module for which these ports are a clone
  * @param name the name of the module instance
  */
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class ModuleCloneIO(mod: BaseModule, name: String) extends Arg {
  override def localName = ""
  override def contextualName(ctx: Component): String =
    // NOTE: mod eq ctx.id only occurs in Target and Named-related APIs
    if (mod eq ctx.id) localName else name
}
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Slot(imm: Node, name: String) extends Arg {
  override def contextualName(ctx: Component): String = {
    val immName = imm.contextualName(ctx)
    if (immName.isEmpty) name else s"$immName.$name"
  }
  override def localName: String = {
    val immName = imm.localName
    if (immName.isEmpty) name else s"$immName.$name"
  }
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class OpaqueSlot(imm: Node) extends Arg {
  override def contextualName(ctx: Component): String = imm.contextualName(ctx)
  override def name: String = imm.name
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Index(imm: Arg, value: Arg) extends Arg {
  def name: String = s"[$value]"
  override def contextualName(ctx: Component): String = s"${imm.contextualName(ctx)}[${value.contextualName(ctx)}]"
  override def localName: String = s"${imm.localName}[${value.localName}]"
}

sealed trait ProbeDetails { this: Arg =>
  val probe: Arg
  override def name: String = s"$probe"
}
private[chisel3] case class ProbeExpr(probe: Arg) extends Arg with ProbeDetails
private[chisel3] case class RWProbeExpr(probe: Arg) extends Arg with ProbeDetails
private[chisel3] case class ProbeRead(probe: Arg) extends Arg with ProbeDetails

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
object Width {
  def apply(x: Int): Width = KnownWidth(x)
  def apply(): Width = UnknownWidth()
}

sealed abstract class Width {
  type W = Int
  def min(that:              Width): Width = this.op(that, _ min _)
  def max(that:              Width): Width = this.op(that, _ max _)
  def +(that:                Width): Width = this.op(that, _ + _)
  def +(that:                Int):   Width = this.op(this, (a, b) => a + that)
  def shiftRight(that:       Int): Width = this.op(this, (a, b) => 0.max(a - that))
  def dynamicShiftLeft(that: Width): Width =
    this.op(that, (a, b) => a + (1 << b) - 1)

  def known: Boolean
  def get:   W
  protected def op(that: Width, f: (W, W) => W): Width
}

sealed case class UnknownWidth() extends Width {
  def known: Boolean = false
  def get:   Int = None.get
  def op(that: Width, f: (W, W) => W): Width = this
  override def toString: String = ""
}

sealed case class KnownWidth(value: Int) extends Width {
  require(value >= 0)
  def known: Boolean = true
  def get:   Int = value
  def op(that: Width, f: (W, W) => W): Width = that match {
    case KnownWidth(x) => KnownWidth(f(value, x))
    case _             => that
  }
  override def toString: String = s"<${value.toString}>"
}

sealed abstract class MemPortDirection(name: String) {
  override def toString: String = name
}
object MemPortDirection {
  object READ extends MemPortDirection("read")
  object WRITE extends MemPortDirection("write")
  object RDWR extends MemPortDirection("rdwr")
  object INFER extends MemPortDirection("infer")
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
abstract class Command {
  def sourceInfo: SourceInfo
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
abstract class Definition extends Command {
  def id: HasId
  def name: String = id.getRef.name
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefPrim[T <: Data](sourceInfo: SourceInfo, id: T, op: PrimOp, args: Arg*) extends Definition

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefInvalid(sourceInfo: SourceInfo, arg: Arg) extends Command

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefWire(sourceInfo: SourceInfo, id: Data) extends Definition

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefReg(sourceInfo: SourceInfo, id: Data, clock: Arg) extends Definition

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefRegInit(sourceInfo: SourceInfo, id: Data, clock: Arg, reset: Arg, init: Arg) extends Definition

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefMemory(sourceInfo: SourceInfo, id: HasId, t: Data, size: BigInt) extends Definition

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefSeqMemory(
  sourceInfo:     SourceInfo,
  id:             HasId,
  t:              Data,
  size:           BigInt,
  readUnderWrite: fir.ReadUnderWrite.Value)
    extends Definition

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefMemPort[T <: Data](
  sourceInfo: SourceInfo,
  id:         T,
  source:     Node,
  dir:        MemPortDirection,
  index:      Arg,
  clock:      Arg)
    extends Definition

@nowarn("msg=class Port") // delete when Port becomes private
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefInstance(sourceInfo: SourceInfo, id: BaseModule, ports: Seq[Port]) extends Definition
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class WhenBegin(sourceInfo: SourceInfo, pred: Arg) extends Command
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class WhenEnd(sourceInfo: SourceInfo, firrtlDepth: Int, hasAlt: Boolean = false) extends Command
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class AltBegin(sourceInfo: SourceInfo) extends Command
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class OtherwiseEnd(sourceInfo: SourceInfo, firrtlDepth: Int) extends Command
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Connect(sourceInfo: SourceInfo, loc: Node, exp: Arg) extends Command
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Attach(sourceInfo: SourceInfo, locs: Seq[Node]) extends Command
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class ConnectInit(sourceInfo: SourceInfo, loc: Node, exp: Arg) extends Command
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Stop(id: stop.Stop, sourceInfo: SourceInfo, clock: Arg, ret: Int) extends Definition
// Note this is just deprecated which will cause deprecation warnings, use @nowarn
@deprecated(
  "This API should never have been public, for Module port reflection, use DataMirror.modulePorts",
  "Chisel 3.5"
)
case class Port(id: Data, dir: SpecifiedDirection, sourceInfo: SourceInfo)

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Printf(id: printf.Printf, sourceInfo: SourceInfo, clock: Arg, pable: Printable) extends Definition

private[chisel3] case class ProbeDefine(sourceInfo: SourceInfo, sink: Arg, probe: Arg) extends Command
private[chisel3] case class ProbeForceInitial(sourceInfo: SourceInfo, probe: Arg, value: Arg) extends Command
private[chisel3] case class ProbeReleaseInitial(sourceInfo: SourceInfo, probe: Arg) extends Command
private[chisel3] case class ProbeForce(sourceInfo: SourceInfo, clock: Arg, cond: Arg, probe: Arg, value: Arg)
    extends Command
private[chisel3] case class ProbeRelease(sourceInfo: SourceInfo, clock: Arg, cond: Arg, probe: Arg) extends Command

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
object Formal extends Enumeration {
  val Assert = Value("assert")
  val Assume = Value("assume")
  val Cover = Value("cover")
}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Verification[T <: VerificationStatement](
  id:         T,
  op:         Formal.Value,
  sourceInfo: SourceInfo,
  clock:      Arg,
  predicate:  Arg,
  message:    String)
    extends Definition

@nowarn("msg=class Port") // delete when Port becomes private
abstract class Component extends Arg {
  def id:    BaseModule
  def name:  String
  def ports: Seq[Port]
  val secretPorts: mutable.ArrayBuffer[Port] = id.secretPorts
}

@nowarn("msg=class Port") // delete when Port becomes private
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefModule(id: RawModule, name: String, ports: Seq[Port], commands: Seq[Command]) extends Component {
  val secretCommands: mutable.ArrayBuffer[Command] = mutable.ArrayBuffer[Command]()
}

@nowarn("msg=class Port") // delete when Port becomes private
@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class DefBlackBox(
  id:     BaseBlackBox,
  name:   String,
  ports:  Seq[Port],
  topDir: SpecifiedDirection,
  params: Map[String, Param])
    extends Component

@nowarn("msg=class Port") // delete when Port becomes private
private[chisel3] case class DefIntrinsicModule(
  id:     BaseIntrinsicModule,
  name:   String,
  ports:  Seq[Port],
  topDir: SpecifiedDirection,
  params: Map[String, Param])
    extends Component

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
case class Circuit(
  name:       String,
  components: Seq[Component],
  @deprecated("Do not use annotations val of Circuit directly - use firrtlAnnotations instead. Will be removed in a future release",
    "Chisel 3.5")
  annotations: Seq[ChiselAnnotation],
  renames:     RenameMap,
  @deprecated("Do not use newAnnotations val of Circuit directly - use firrtlAnnotations instead. Will be removed in a future release",
    "Chisel 3.5")

  newAnnotations: Seq[ChiselMultiAnnotation]) {

  def this(name: String, components: Seq[Component], annotations: Seq[ChiselAnnotation], renames: RenameMap) =
    this(name, components, annotations, renames, Seq.empty)

  def firrtlAnnotations: Iterable[Annotation] =
    annotations.flatMap(_.toFirrtl.update(renames)) ++ newAnnotations.flatMap(
      _.toFirrtl.flatMap(_.update(renames))
    )

  def copy(
    name:        String = name,
    components:  Seq[Component] = components,
    annotations: Seq[ChiselAnnotation] = annotations,
    renames:     RenameMap = renames
  ) = Circuit(name, components, annotations, renames, newAnnotations)

}

@deprecated(deprecatedPublicAPIMsg, "Chisel 3.6")
object Circuit
    extends scala.runtime.AbstractFunction4[String, Seq[Component], Seq[ChiselAnnotation], RenameMap, Circuit] {
  def unapply(c: Circuit): Option[(String, Seq[Component], Seq[ChiselAnnotation], RenameMap)] = {
    Some((c.name, c.components, c.annotations, c.renames))
  }

  def apply(name: String, components: Seq[Component], annotations: Seq[ChiselAnnotation], renames: RenameMap): Circuit =
    new Circuit(name, components, annotations, renames)
}
