module Validations::TenancyValidations
  # Validations methods need to be called 'validate_<page_name>' to run on model save
  # or 'validate_' to run on submit as well
  include Validations::SharedValidations

  def validate_fixed_term_tenancy(record)
    is_present = record.tenancylength.present?
    is_in_range = record.tenancylength.to_i.between?(min_tenancy_length(record), 99)
    conditions = [
      {
        condition: !(record.is_secure_tenancy? || record.is_assured_shorthold_tenancy?) && is_present,
        error: I18n.t("validations.tenancy.length.fixed_term_not_required"),
      },
      {
        condition: (record.is_assured_shorthold_tenancy? && !is_in_range) && is_present,
        error: I18n.t(
          "validations.tenancy.length.shorthold",
          min_tenancy_length: min_tenancy_length(record),
          rent_type: rent_type_mapping(record)[record.rent_type],
          needs_type: needs_type_mapping[record.needstype]
        ),
      },
      {
        condition: record.is_secure_tenancy? && (!is_in_range && is_present),
        error: I18n.t(
          "validations.tenancy.length.secure",
          min_tenancy_length: min_tenancy_length(record),
          rent_type: rent_type_mapping(record)[record.rent_type],
          needs_type: needs_type_mapping[record.needstype]
        ),
      },
    ]

    conditions.each do |condition|
      next unless condition[:condition]

      record.errors.add :tenancylength, condition[:error]
      record.errors.add :tenancy, condition[:error]
    end
  end

  def validate_other_tenancy_type(record)
    validate_other_field(record, 3, :tenancy, :tenancyother, "tenancy type", "other tenancy type")
  end

  def validate_joint_tenancy(record)
    return unless record.collection_start_year && record.joint

    if record.hhmemb == 1 && record.joint != 2 && record.collection_start_year >= 2022
      record.errors.add :joint, I18n.t("validations.tenancy.not_joint")
      record.errors.add :hhmemb, I18n.t("validations.tenancy.joint_more_than_one_member")
    end
  end

  def min_tenancy_length(record)
    record.needstype == 2 || record.rent_type.in?([3, 5]) ? 1 : 2
  end

  def rent_type_mapping(record)
    {
      1 => "Affordable Rent",
      2 => "London Affordable Rent",
      4 => "London Living Rent",
      3 => "Rent to Buy",
      0 => "Social Rent",
      5 => record.irproduct,
    }
  end

  def needs_type_mapping
    {
      1 => "General needs",
      2 => "Supported housing",
    }
  end
end