class Characters::ItemsController < ApplicationController
  before_action :set_character, only: :index

  def index
  end

  def equip
    @item = Item.find(params[:item_id])
    unless current_char.can_equip? @item
      flash[:alert] = "Couldn't equip #{@item.name}"
      flash[:alert] += " (requires #{@item.equip_requirements&.join(", ")})" if @item.equip_requirements.any?
      return
    end
    current_char.equip(@item)
    flash[:notice] = "Equipped #{@item.name}."
  rescue EquipmentError
    flash[:alert] = "Couldn't equip #{@item.name}. Make sure the slot is free."
  ensure
    redirect_to character_items_path(current_char)
  end

  def unequip
    current_char.unequip(params[:slot].to_sym)
    flash[:notice] = "Unequipped item."
  rescue EquipmentError
    flash[:alert] = "Couldn't unequip item."
  ensure
    redirect_to character_items_path(current_char)
  end

  def use
    @item = Item.find(params[:item_id])
    unless @item.usable?
      flash[:alert] = "You can't use #{@item.name}."
      redirect_to character_items_path(current_char) and return
    end
    unless current_char.character_items.exists?(item: @item)
      flash[:alert] = "You don't have #{@item.name}."
      redirect_to character_items_path(current_char) and return
    end
    @item.whatnot[:use_effects]&.each do |effect|
      case effect[:type]
      when "change_wounds"
        # This is basically duplicated in HearthAmenityController
        Character.transaction do
          wounds_change = [effect[:value], -current_char.wounds].max
          current_char.shift_item(@item, -1)
          current_char.wounds = current_char.wounds + wounds_change
          current_char.save!
          flash[:notice] = "#{effect[:message]}"
          heal_or_gain = wounds_change.positive? ? "gain" : "heal"
          flash[:notice] += " You #{heal_or_gain} #{wounds_change.abs} wound(s)."
        end
      when "activity"
        start_activity(Activity.find_by_gid(effect[:gid])) and return
      when "condition"
        condition = Condition.find_by_gid(effect[:gid])
        Character.transaction do
          current_char.shift_item(@item, -1)
          current_char.states.create!(condition: condition, expires_at: Time.now + effect[:duration])
          flash[:notice] = "#{effect[:message]}"
          flash[:notice] += " You gain the #{condition.name} condition."
        end
      else
        raise "Invalid use effect type string (#{effect[:type]})"
      end
      redirect_to character_items_path(current_char)
    end
  end

  private
    def set_character
      @character = Character.find(params[:character_id])
      unless current_char == @character
        flash[:alert] = "You can only look at your own items."
        redirect_to character_path(@character)
      end
    end
end