class ParticipantsController < ApplicationController
  before_action :set_participant, only: [:show, :edit, :update, :destroy]
  
  def index
    @participants = Participant.order(:last_name).page(params[:page]).per(5) # Adjust the number per page as needed
  end
  

  def show
    @participant = Participant.includes(:employments, :service_contracts).find(params[:id])
    @workers = @participant.workers  # Fetch associated workers
    @employments = @participant.employments.includes(:worker).order('workers.last_name')
    @service_contracts = @participant.service_contracts.includes(:vendor)  # Fetch associated service contracts
    @employment = Employment.new  # Initialize a new Employment object
    @service_contract = ServiceContract.new  # Initialize a new Service Contract object
  end
  
  def new
    @participant = Participant.new
  end

  def create
    @participant = Participant.new(participant_params)
  
    if ssn_already_taken?(@participant.ssn)
      flash.now[:alert] = 'SSN is already taken by another participant or employer.'
      render :new, status: :unprocessable_entity and return
    end
  
    ActiveRecord::Base.transaction do
      if params[:is_employer] == 'yes'
        # This assumes you have a method `create_new_employer_for_participant` that handles creating a new employer and setting `@participant.employer_id`.
        unless create_new_employer_for_participant(@participant)
          render :new, status: :unprocessable_entity and return
        end
      elsif params[:employer_id].present?
        # Directly assign the existing employer_id to the participant
        @participant.employer_id = params[:employer_id]
      end
  
      if @participant.save
        # Create an EmployerRecord only if necessary.
        create_employer_record(@participant) if @participant.employer_id.present?
  
        redirect_to @participant, notice: 'Participant was successfully created.'
      else
        render :new, status: :unprocessable_entity
      end
    end
  rescue ActiveRecord::RecordInvalid => e
    flash.now[:alert] = "Failed to create participant: #{e.message}"
    render :new, status: :unprocessable_entity
  end
  
  
  def edit
  end

  def update
    @participant = Participant.find(params[:id])
  
    if @participant.update(participant_params)
      update_employer_details(@participant)
      
      if @participant.errors.any?
        # If there are errors (e.g., from updating employer details), re-render the edit form.
        render :edit
      else
        # If everything went well, redirect to the participant's show page.
        redirect_to @participant, notice: 'Participant and associated employer details were successfully updated.'
      end
    else
      render :edit
    end
  end
  
  

  def search
    if params[:term].present?
      @participants = Participant.where("first_name LIKE ? OR last_name LIKE ?", "%#{params[:term]}%", "%#{params[:term]}%")
    else
      @participants = Participant.none
    end

    respond_to do |format|
      format.json { render json: @participants.map { |participant| { label: participant.full_name, value: participant.id } } }
    end
  end

  def destroy
    @participant = Participant.find(params[:id])
    begin
      @participant.destroy
      redirect_to participants_url, notice: 'Participant was successfully destroyed.'
    rescue ActiveRecord::InvalidForeignKey
      # Redirect with an error message if foreign key constraints fail
      redirect_to participants_url, alert: 'Participant cannot be deleted because it is linked to other records.'
    end
  end

  def link_worker
    @participant = Participant.find(params[:id])
    @employment = @participant.employments.new(employment_params)
  
    if @employment.save
      redirect_to @participant, notice: 'Worker was successfully linked.'
    else
      Rails.logger.debug @employment.errors.full_messages
      flash[:alert] = @employment.errors.full_messages.to_sentence
      render 'show'
    end
  end

  def link_vendor
    @participant = Participant.find(params[:id])
    @service_contract = @participant.service_contracts.new(service_contract_params)
  
    if @service_contract.save
      redirect_to @participant, notice: 'Vendor was successfully linked.'
    else
      flash[:alert] = @service_contract.errors.full_messages.to_sentence
      render 'show'
    end
  end
  
  private

  def handle_employer_creation_for_participant(participant)
    if params[:is_employer] == 'yes'
      employer = Employer.create!(employer_params_from_participant(participant))
      participant.employer_id = employer.id
    elsif params[:employer_id].present?
      participant.employer_id = params[:employer_id]
    end
  end

  def set_participant
    @participant = Participant.find(params[:id])
  end

  def ssn_already_taken?(ssn)
    Participant.exists?(ssn: ssn) || Employer.exists?(ssn: ssn)
  end

  def participant_params
    params.require(:participant).permit(
      :first_name, 
      :last_name, 
      :address_line_1, 
      :address_line_2, 
      :city, 
      :state, 
      :zip, 
      :phone, 
      :email, 
      :mci, 
      :dob, 
      :ssn, 
      :gender, 
      :employer_id
    )
  end
  
  
  def employer_params_from_participant(participant)
    {
      first_name: participant.first_name,
      last_name: participant.last_name,
      address_line_1: participant.address_line_1,
      address_line_2: participant.address_line_2,
      city: participant.city,
      state: participant.state,
      zip: participant.zip,
      phone: participant.phone,
      email: participant.email,
      dob: participant.dob,
      ssn: participant.ssn,
      gender: participant.gender
    }
  end
  
  def employment_params
    params.require(:employment).permit(:worker_id, :start_date, :end_date)
  end

  def service_contract_params
    params.require(:service_contract).permit(:vendor_id, :start_date, :end_date)
  end

  def create_new_employer_for_participant(participant)
    employer = Employer.create!(employer_params_from_participant(participant))
    participant.employer_id = employer.id
    employer.persisted?
  end

  def create_employer_record(participant)
    EmployerRecord.create!(participant: participant, employer_id: participant.employer_id, start_date: Date.today)
  end
  
  
  def update_employer_details(participant)
    employer = Employer.find(participant.employer_id)
    
    update_attrs = {
      # Include all fields you want to update, excluding SSN
      first_name: participant.first_name,
      last_name: participant.last_name,
      address_line_1: participant.address_line_1,
      address_line_2: participant.address_line_2,
      city: participant.city,
      state: participant.state,
      zip: participant.zip,
      phone: participant.phone,
      email: participant.email,
      dob: participant.dob,
      gender: participant.gender,
    }
    
    unless employer.update(update_attrs)
      # If the update fails, add a custom error to the participant object.
      participant.errors.add(:base, "Employer details could not be updated: #{employer.errors.full_messages.join(', ')}")
      # You might not need to throw :abort if you're handling this logic in the controller.
    end
  end
  
end