package crazypants.enderio.machine;

public class SlotDefinition {

  public final int minUpgradeSlot;
  public final int maxUpgradeSlot;

  public final int minInputSlot;
  public final int maxInputSlot;

  public final int minOutputSlot;
  public final int maxOutputSlot;

  public SlotDefinition(int numInputs, int numOutputs, int numUpgradeSlots) {
    this.minInputSlot = 0;
    this.maxInputSlot = numInputs - 1;
    this.minOutputSlot = numOutputs > 0 ? numInputs : -10;
    this.maxOutputSlot = minOutputSlot + (numOutputs - 1);
    this.minUpgradeSlot = numUpgradeSlots > 0 ? numInputs + numOutputs : -1;
    this.maxUpgradeSlot = minUpgradeSlot + (numUpgradeSlots - 1);
  }

  public SlotDefinition(int numInputs, int numOutputs) {
    this.minInputSlot = 0;
    this.maxInputSlot = numInputs - 1;
    this.minOutputSlot = numOutputs > 0 ? numInputs : -10;
    this.maxOutputSlot = minOutputSlot + (numOutputs - 1);
    this.minUpgradeSlot = Math.max(maxInputSlot, maxOutputSlot) + 1;
    this.maxUpgradeSlot = minUpgradeSlot;
  }

  public SlotDefinition(int minInputSlot, int maxInputSlot, int minOutputSlot, int maxOutputSlot, int minUpgradeSlot, int maxUpgradeSlot) {
    this.minInputSlot = minInputSlot;
    this.maxInputSlot = maxInputSlot;
    this.minOutputSlot = minOutputSlot;
    this.maxOutputSlot = maxOutputSlot;
    this.minUpgradeSlot = minUpgradeSlot;
    this.maxUpgradeSlot = maxUpgradeSlot;
  }

  public boolean isUpgradeSlot(int slot) {
    return slot >= minUpgradeSlot && slot <= maxUpgradeSlot;
  }

  public boolean isInputSlot(int slot) {
    return slot >= minInputSlot && slot <= maxInputSlot;
  }

  public boolean isOutputSlot(int slot) {
    return slot >= minOutputSlot && slot <= maxOutputSlot;
  }

  public int getNumUpgradeSlots() {
    if(minUpgradeSlot < 0) {
      return 0;
    }
    return Math.max(0, maxUpgradeSlot - minUpgradeSlot + 1);
  }

  public int getNumInputSlots() {
    if(minInputSlot < 0) {
      return 0;
    }
    return Math.max(0, maxInputSlot - minInputSlot + 1);
  }

  public int getNumOutputSlots() {
    if(minOutputSlot < 0) {
      return 0;
    }
    return Math.max(0, maxOutputSlot - minOutputSlot + 1);
  }

  public int getNumSlots() {
    return Math.max(Math.max(getMaxInputSlot(), getMaxOutputSlot()), getMaxUpgradeSlot()) + 1;
  }

  public int getMinUpgradeSlot() {
    return minUpgradeSlot;
  }

  public int getMaxUpgradeSlot() {
    return maxUpgradeSlot;
  }

  public int getMinInputSlot() {
    return minInputSlot;
  }

  public int getMaxInputSlot() {
    return maxInputSlot;
  }

  public int getMinOutputSlot() {
    return minOutputSlot;
  }

  public int getMaxOutputSlot() {
    return maxOutputSlot;
  }

  @Override
  public String toString() {
    return "SlotDefinition [minUpgradeSlot=" + minUpgradeSlot + ", maxUpgradeSlot=" + maxUpgradeSlot + ", minInputSlot=" + minInputSlot + ", maxInputSlot="
        + maxInputSlot + ", minOutputSlot=" + minOutputSlot + ", maxOutputSlot=" + maxOutputSlot + ", nunSlots=" + getNumSlots() + " ]";
  }

}