module RailsAiAdmin::Fields::ScalarSchema

# File lib/rails_ai_admin/fields/scalar_schema.rb, line 18
def self.compile(base, constraints)
  unless constraints.is_a?(Hash) && constraints.keys.all? { |key| key.is_a?(String) || key.is_a?(Symbol) } && constraints.stringify_keys.size == constraints.size
    raise ConfigurationError, "Field schema constraints must be a scalar keyword hash"
  end
  constraints = constraints.stringify_keys
  allowed_keys = SHARED_KEYS + TYPE_KEYS.fetch(base.fetch("type"))
  if (constraints.keys - allowed_keys).any? || constraints.key?("type") && constraints["type"] != base.fetch("type")
    raise ConfigurationError, "Field schema cannot change the core scalar type or use unsupported keywords"
  end
  if constraints["pattern"] && (!constraints["pattern"].is_a?(String) || constraints["pattern"].bytesize > 1000)
    raise ConfigurationError, "Field schema pattern must be bounded text"
  end
  %w[title description].each do |key|
    raise ConfigurationError, "Field schema text must be bounded" if constraints[key] && (!constraints[key].is_a?(String) || constraints[key].bytesize > 300)
  end
  if constraints.key?("const") && !scalar?(constraints["const"]) || constraints.key?("enum") &&
      (!constraints["enum"].is_a?(Array) || !constraints["enum"].all? { |value| scalar?(value) })
    raise ConfigurationError, "Field enum and const constraints must contain JSON scalars"
  end
  encoded = JSON.generate(constraints)
  raise ConfigurationError, "Field schema is too large" if encoded.bytesize > 8192
  constraints = JSON.parse(encoded)
  schema = constraints.empty? ? base : base.merge("allOf" => [ constraints ])
  validator = JSONSchemer.schema(schema, ref_resolver: ->(*) { raise ConfigurationError, "Field schema references are unsupported" })
  raise ConfigurationError, "Invalid scalar field schema" unless validator.valid_schema?
  [ schema, validator ]
rescue JSON::GeneratorError, JSON::ParserError, EncodingError, RegexpError, ArgumentError
  raise ConfigurationError, "Invalid scalar field schema", cause: nil
end