# Ruby To-Do List Application - Task Model
# Created by: Molla Samser (help@rskworld.in, +91 93305 39277)
# Address: Nutanhat, Mongolkote, Purba Burdwan, West Bengal, India, 713147
# Year: 2026

class Task < ApplicationRecord
  # Associations
  belongs_to :user
  belongs_to :category, optional: true

  # Active Storage
  has_many_attached :attachments

  # Validations
  validates :title, presence: true, length: { minimum: 1, maximum: 255 }
  validates :description, length: { maximum: 1000 }, allow_blank: true
  validates :priority, inclusion: { in: [1, 2, 3] }, allow_nil: true

  # Scopes
  scope :completed, -> { where(completed: true) }
  scope :pending, -> { where(completed: false) }
  scope :high_priority, -> { where(priority: 3) }
  scope :medium_priority, -> { where(priority: 2) }
  scope :low_priority, -> { where(priority: 1) }
  scope :overdue, -> { where('due_date < ? AND completed = ?', Time.current, false) }
  scope :due_today, -> { where('due_date >= ? AND due_date < ?', Time.current.beginning_of_day, Time.current.end_of_day) }

  # Callbacks
  before_update :set_completed_at, if: :completed_changed?

  # Search functionality
  include PgSearch::Model
  pg_search_scope :search_by_title_and_description,
    against: [:title, :description],
    using: {
      tsearch: { prefix: true }
    }

  # Class methods for search
  def self.search(query, user)
    if query.present?
      user.tasks.search_by_title_and_description(query)
    else
      user.tasks.all
    end
  end

  # Methods
  def priority_name
    case priority
    when 1
      'Low'
    when 2
      'Medium'
    when 3
      'High'
    else
      'Not Set'
    end
  end

  def priority_color
    case priority
    when 1
      'success' # Green for low
    when 2
      'warning' # Yellow for medium
    when 3
      'danger'  # Red for high
    else
      'secondary'
    end
  end

  def toggle_completion!
    update(completed: !completed)
  end

  def overdue?
    due_date.present? && due_date < Time.current && !completed
  end

  def due_today?
    due_date.present? && due_date >= Time.current.beginning_of_day && due_date < Time.current.end_of_day
  end

  private

  def set_completed_at
    self.completed_at = completed ? Time.current : nil
  end

  def completed_changed?
    completed_changed?
  end
end