# Copyright (C) 2024-2025 LibreWeddingPlanner contributors

# frozen_string_literal: true

class TablesArrangementsController < ApplicationController
  def index
    query = TablesArrangement
            .order(valid: :desc)
            .order(discomfort: :asc)
            .select(:id, :name, :discomfort, :status, :progress)
            .select("digest = '#{current_digest}'::uuid OR discomfort IS NULL as valid")
            .limit((params[:limit].presence&.to_i || 20).clamp(1..20))

    query = query.where(status: params[:status]) if params[:status].present?

    render json: query
      .as_json(only: %i[id name discomfort valid status progress])
  end

  def stats
    scope = TablesArrangement.where('digest = ?::uuid OR discomfort IS NULL', current_digest)

    render json: {
      count: scope.group(:status).count,
      in_progress: scope.where(status: :in_progress).limit(10).order(progress: :desc).pluck(:progress)
    }
  end

  def show
    Guest.joins(:seats, :group)
         .where(seats: { tables_arrangement_id: params[:id] })
         .select('guests.*', 'groups.color', 'seats.table_number')
         .group_by(&:table_number)
         .map { |number, guests| format(number:, guests:) }
         .then { |result| render json: { id: params[:id], tables: result } }
  end

  def create
    ActiveRecord::Base.transaction do
      tables_arrangement = TablesArrangement.create!(status: :not_started)
      TableSimulatorJob.perform_later(current_tenant.id, tables_arrangement.id)
    end

    render json: {}, status: :created
  end

  private

  def current_digest
    @current_digest ||= Tables::Distribution.digest(current_tenant)
  end

  def format(number:, guests:)
    {
      number: number,
      discomfort: discomfort(guests: guests),
      guests: guests.as_json(only: %i[id name color])
    }
  end

  def discomfort(guests:)
    table = Tables::Table.new(guests)

    table.min_per_table = TableSimulatorJob::MIN_PER_TABLE
    table.max_per_table = TableSimulatorJob::MAX_PER_TABLE
    calculator = Tables::DiscomfortCalculator.new(table:)
    {
      discomfort: calculator.calculate,
      breakdown: calculator.breakdown
    }
  end
end